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TM 9-2320-303-10 - JATONKAM35s HOME ON THE WEB

1. Extreme Cold Operate Extreme Heat nne F Fifth Wheel Sliding FOIGING M 2 36 2 95 Fuel System Principles of 1 14 1 14 G General PMCS 4 61 H Heater and Defroster Operate 2 26 1 Inflation 0 Initial Initial Adjustments Daily Checks and Self Tests Instrument Panel L Lights 2 24 2 79 List of Abbreviations 1 8 1 3 Location and Description of Major Components 1 10 1 6 Index 2 9 2320 303 10 Subject Paragraph Page M Maintenance Forms and Procedures Major Components Location and Description Mud Flap Mud or Soft Surfaces Operate N Nomenclature Cross Reference 1 7 1 3 Air
2. 3 9 3 18 Woods or Rocky Terrain Operate 2 38 2 97 Index 5 By Order of the Secretary of the Army ERIC K SHINSEKI General United States Army Official Chief of Staff HUDSON Administrative Assistant to the Secretary of the Army 0126109 DISTRIBUTION To be distributed in accordance with the initial distribution requirements for IDN 381111 TM 9 2320 303 10 9 2320 303 10 RECOMMENDED CHANGES TO PUBLICATIONS AND Use Part II reverse for Repair Parts and BLANK FORMS Special Too Lists RPSTLI and Supply For uae of pis lom soa AR 15 30 proponam agency ODIBCA Catalogs Suppry Manuals 5 5 TO Forward fo proponent of publication or formi Include ZIP Codes FROM Activity and location Include ZIP Code AMSTA LC CI TECH PUBS TACOM RI 125th Transportation Company 1 Rock Island Arsenal ATTN Motor SGT SGT Wilson Rock Island IL 61299 7630 Ft Riley KA 78665 4000 PART i ALL PUBLICATIONS EXCEPT RPSTL AND BC 5M AND BLANK FORMS PUBLICATIONIFORM NUMBER DATE TITLE Truck Tractor Line Haul for TM 9 2320 303 10 15 Oct 2001 Operator s Manual Pere nummum Part number for item 4 detergent is incorrect TYPED NAME GRADE OR TITLE TELEPHONE EXCHANGE AUTOVON SIGNATURE PLUS EXTENSION Johnny Wilson 5 MOTOR SGT DSN 867 7967 DA 2028 REPLACES DA FORM 2028 1 DEC 68 WHICH WILL BE USED U
3. Operate Heater and Preparation for Operate Tiltable 2 10 GENERAL WARNING These vehicles have been designed to operate safely and efficiently within the limits specified in this TM Operation beyond these limits is prohibited in accordance with AR 70 1 without written approval from Commander U S Army Tank automotive and Armaments Command ATTN AMSTA DSA CS Warren MI 48397 5000 This section contains instructions for safely operating the M915A4 under usual conditions Unusual conditions are defined and described in Section IVlof this chapter 2 11 INITIAL ADJUSTMENTS DAILY CHECKS AND SELF TESTS a Place master battery switch to ON b Perform Before operation Preventive Maintenance Checks and Services PMCS Chapter 2 Section Il c Change military load classification paragraph 1 11 if necessary 2 61 9 2320 303 10 INITIAL ADJUSTMENTS DAILY CHECKS AND SELF TESTS Con t 2 11 d Adjust side mirrors 3 by loosening two nuts 2 and moving side mirror to proper position Tighten two nuts CAUTION DO NOT attempt to adjust spotter mirrors without loosening screws Attaching screw may become loose and result in loss of spotter mirror e Adjust spotter mirrors 1 by loosening three screws 4 and moving spotter mirror to proper
4. EXPENDABLE AND DURABLE ITEMS LIST D 1 STOWAGE AND DECAL DATA PLATE AND STENCIL GUIDE LUBRICATION 1 524 Index 1 9 2320 303 10 HOW USE THIS MANUAL This manual is designed to help you operate and maintain the M915A4 truck tractor FEATURES OF THIS MANUAL A table of contents is provided at the beginning of this manual An index of all paragraphs contained within a section is found at the beginning of each section WARNINGs CAUTIONs NOTEs subject headings and other important information are highlighted in BOLD print as a visual aid WARNING A WARNING indicates a hazard which can result in death or serious injury CAUTION A CAUTION is a reminder of safety practices or directs attention to usage practices that may result in damage to equipment NOTE A NOTE is a statement containing information that will make the procedure easier to perform Statements and words of particular importance are printed in CAPITAL LETTERS to create emphasis Instructions are located with illustrations that show the specific task on which the operator is working Dashed leader lines used in illustrations indicate that called out items are not visible i e they are located within the structure Dashed leader lines in the Lubrication Chart indicate that lubrication is required on BOTH sides of the equipment Te
5. 2 22 Heater and In E Iri Extreme Heat eii In Mud or Soft Surfaces 21 2 35 2 94 In Woods or On Rocky DONEC TREE 2 24 On Snow or 4 84 Portable Fire Sandy or Dusty Conditions Sliding Fifth nenna Tiltable Operation Spare Wheel and Tire Assembly Carrier P Pintle Towing Procedures 00811 PMCS Procedures Portable Fire Extinguisher Preparation for Preventive Maintenance Checks and Services PMCS for Pr Index 3 9 2320 303 10 Subject Paragraph Page P Con t Principles of Operation Air Conditioning 5 dne pncdepesdiitatss qud sbti Air System PRIN MD
6. 19 17 Cooling Syste RD 1 16 1 15 Drive Train NR NUDO ERN Electrical SyStem societe ducant eda tec Exhaust System M Sem E R Refueling ERIT E Reporting Equipment Improvement Recommendations EIRs 1 5 1 2 Rifle Mounting Kit carita 2 25 2 81 S Sandy or Dusty Conditions Operate in Seat Controls 2 5 2 15 S I 2 11 2 61 Semitrailer 0 Uncouple Sh t Down Engine ontario ende recien Slave Start Tr ck Snow and Ice Operate sien Steering Wheel and Column Mounted Controls Steering Principles of T MIPS DIVING n REI cM eec Transmission Operate Index 4 9 2320 303 10 Subject Paragraph Page T Con t Transport Preparation 2 27 2 82 Troubleshootiimg cdae able 3 1 3 6 Troubleshooting Symptom U Uncouple from Semitrailer eese 2 19 2 75 Warranty 1 6 1 2 Wheel and Tire Assembly
7. FM 21 305 NBC Contamination 2 FM 3 3 9 2320 303 10 4 FIELD MANUALS Con t NBC Decontamination FM 3 5 NBG Protection rerit E phe E exert RE sabes FM 3 4 Northern nnne 31 71 Vehicle Recovery Operations FM 20 22 A 5 TECHNICAL MANUALS cr e eret a a RE re Bale ens TM 9 6140 200 14 Care Maintenance Repair and Inspection of Pneumatic Tires and Inner TM 9 2620 200 14 Destruction of Army Materiel to Prevent Enemy TM 750 244 6 Operator s Unit Direct Support and General Support Maintenance Manual Including Repair Parts and Special Tools List for Semitrailer Flatbed Breakbulk Container Transporter 34 Ton 872 872 1 872 2 872 TM 9 2330 359 14 amp P Operator s Unit Direct Support and General Support Maintenance Manual Including Repair Parts and Special Tools List for Semitrailer Tactical Dual Purpose Breakbulk Container Transporter 22 1 2 Ton 871 871 1 TM 9 2330 359 14 amp P Operator s Unit Direct Support and General Support Maintenance Manual Including Repair Parts and Special Tools List for Semitrailer Tank Fuel 7500 Gallon 9 2330 384 14 amp P Principles of
8. View evidence of fluid hydraulic leaks or Class leakage such as oil fuel leaks are evident coolant fuel or a Check under truck for a Class Ill oil coolant or hydraulic fluid 9 2320 303 10 Table 2 1 Preventive Maintenance Checks Services PMCS for M915A4 Con t Item To Check Not Fully Mission Interval Service Procedure Capable If 23 After Overall b Check front gladhands Con t View for damage Ensure that gladhand vent holes are not plugged Ensure that dummy couplings are installed c Check truck for c Damage that would impair obvious damage that operation is evident would impair operation d Check for damage to d Lights are damaged front service blackout lights marker clearance lights 23 After Wheels WARNING and Tires Operating truck with an underinflated defective tire may lead to tire failure and loss of steering control Damage to equipment or injury to personnel may result Visually check all left side Tire is missing deflated tires for defects unserviceable or two underinflation or loose or more wheel studs or lug nuts missing wheel studs or are missing lug nuts 24 After Front Check that lubricating oil Axle is visible in sight glass Wheel 25 and rubber plug 24 Bearings is installed oil is not visible in sight glass remove plug and add until level is even with plug opening A
9. tet do e ca Rte TERR tb tended eut PARET Ire se pee nas Pounds per Square Inch quM En Revolutions per Minute This Page Intentionally Left Blank TM 9 2320 303 10 9 2320 303 10 Section Il EQUIPMENT DESCRIPTION AND DATA Paragraph Page Number Paragraph Title Number 1 9 Equipment Characteristics Capabilities and Features 1 5 Location and Description of Major Components 1 6 1 11 Equipment 1 9 1 9 EQUIPMENT CHARACTERISTICS CAPABILITIES AND FEATURES a Characteristics 1 The M915A4 is used to transport M871 M872 and M1062 semitrailers on line haul missions 2 It has a Gross Vehicle Weight Rating GVWR of 52 000 Ib 23 608 kg and is equipped with a two way oscillating sliding fifth wheel compatible with a two inch kingpin Maximum towed load on kingpin is 30 000 Ib 13 620 kg b Capabilities and Features 1 While operating on Class roads the fully loaded M915A4 can maintain a speed of 55 mph 88 kph on level roads and 29 mph 47 kph while ascending a 3 percent grade It has a minimum turning diameter curb to curb of 53 ft 9 in 16 4 m 2 Average cruising ranges at Gross Combination Weight Rating GCWR with a full tank of fuel will vary based on conditions e g varying loads prolonged idle and climatic conditions Cruising range is optimally 300 miles 483 km 3 M915A4 is equipped with an instrum
10. 9 2320 303 10 OPERATOR S MANUAL FOR TRUCK TRACTOR LINE HAUL 52 000 GVWR 6 X 4 M915A4 NSN 2320 01 458 1207 Approved for public release distribution is unlimited HEADQUARTERS DEPARTMENT OF THE ARMY 15 OCTOBER 2001 9 2320 303 10 LIST OF EFFECTIVE PAGES Dates of issue for original and changed pages work packages are Original October 2001 Not Applicable TOTAL NUMBER OF PAGES ON THIS PUBLICATION 16 216 CONSISTING OF THE FOLLOWING Pag Change No No I 0 0 Warnings 0 0 1 1 thru 1 21 2 0 2 1 thru 2 100 0 3 1 thru 3 23 0 1 and 2 0 B 1 thru 7 0 G1 thr GS 8 reca 0 D 1 thru 4 0 E 1 th E O 0 1 thru 12 0 Index 1 thru 5 0 Authentication Page 0 Sample DA Form 2028 0 Blank DA Form 2028 0 Metric Conversion Chart 0 Back Cover 0 Zero in this column indicates an original page 9 2320 303 10 FOR INFORMATION FIRST AID REFER FM 21 11 WARNING CARBON MONOXIDE EXHAUST GASES CAN KILL
11. 2 1 GENERAL Do not attempt to operate the M915A4 until becoming familiar with the location and use of all controls and indicators The following section describes all operator controls and indicators 2 1 2 2 INSTRUMENT PANEL a Instrument Cluster TM 9 2320 303 10 1 Left Gage Panel Air Vent Engine Water Temperature Gage Engine Oil Pressure Gage Voltmeter Vents air into cab from heater ventilator defroster and air conditioner if equipped Louvered openings are adjustable Registers engine coolant temperature in degrees Fahrenheit Normal range is in green band 190 210 F 88 99 If needle goes into yellow band 210 215 99 120 C or red band 216 250 F 102 121 C stop and investigate cause Registers engine oil pressure in psi kPa Normal pressure at rated speed 1200 rpm is 50 70 psi 345 483 kPa Pressure at idle speed 600 rpm is 15 psi 100 kPa minimum Indicates rate of battery charge or discharge in volts a RED BAND Below 11 volts indicates a possible malfunction Stop and report problem to Unit Maintenance YELLOW BAND 11 12 volts indicates battery is undercharged Turn off all electrical circuits if possible and run engine at highest rpm permitted for existing conditions If reading is still not in green band notify Unit Maintenance GREEN BAND 13 15 volts indicates normal operating range RED BAND Above 15 volts indicates batteries are being overcharged
12. 3 Check frequently for rust and fungus growth Clean and lubricate vehicle to help prevent deterioration 2 35 OPERATE MUD OR SOFT SURFACES NOTE e M915A4 is equipped with No Spin automatic locking positive traction differential on the forward rear axle The No Spin differential eliminates individual wheel spinout for better traction e When locking system is engaged driving axles receive equal torque a Before entering mud or other soft surfaces check conditions and select appropriate transmission gear range Place interaxle lockout control valve lever in LOCK position Enter soft area at a medium speed for gear range selected b Maintain steady pressure on accelerator pedal to keep vehicle rolling until solid ground is reached Do not accelerate to point where wheels spin and do not stop if possible If vehicle gets stuck try to pull out slowly a low gear Boards brush or similar materials may be placed under tires to provide traction d When vehicle reaches hard surface place interaxle lockout control valve lever in UNLOCK position e Notify Unit Maintenance to clean and inspect propeller shafts for proper lubrication 2 94 9 2320 303 10 2 36 FORDING a General 1 Maximum fording depth is 20 in 50 8 cm 2 Ford to maximum depth for short periods and short distances only Vehicles can ford to maximum depth for five minutes without requiring maintenance to continue operation b
13. Cage and Brakes Operate in Extreme Operate in Extreme Heat 0 0221 Operate in Mud or Soft as Operate in Sandy or Dusty Conditions Operate in Woods or On Rocky Operate on Snow or 2 29 GENERAL WARNING These vehicles have been designed to operate safely and efficiently within the limits specified in this TM Operation beyond these limits is prohibited in accordance with AR 70 1 without written approval from Commander U S Army Tank automotive and Armaments Command ATTN AMSTA DSA CS Warren MI 48397 5000 This section contains instructions for safely operating the M915A4 under unusual conditions In addition to normal preventive maintenance special care must be taken to keep truck operational in extreme temperatures and other environmental conditions b Refer to FM 21 300 and FM 21 305 for additional information 2 87 9 2320 303 10 2 30 SLAVE START TRUCK WARNING e When slave starting truck use NATO slave cable that DOES NOT have loose or missing insulation DO NOT proceed if suitable cable is not available DO NOT use civilian type jumper cables CAUTION e If dead truck s engin
14. gear shaft 1 clockwise until spare wheel and tire assembly 5 is raised to stowed position 3 Engage pawl 2 on gear shaft 1 4 Install two nuts 4 9 2320 303 10 3 9 WHEEL AND TIRE ASSEMBLY REPLACEMENT NOTE When changing tires DO NOT substitute type or size tire unless all tires on the vehicle can be converted Keep all tires the same size and type a Placement of Jack 1 For front tire replacement place jack 4 so jack ram 3 is under first small leaf spring 1 just forward of axle 2 2 For rear tire replacement place jack 4 so jack ram 3 is under equalizing beam 6 inboard of equalizing beam end adapter 5 b Remove Wheel and Tire Assembly 1 Block wheels 2 Remove spare wheel and tire assembly from carrier paragraph 3 8 3 9 9 2320 303 10 WHEEL AND TIRE ASSEMBLY REPLACEMENT Con t NOTE If replacing inner rear tire loosen both outer and inner wheel nuts Wheel nuts on left side of vehicle are left hand threads turn right to loosen turn left to tighten Wheel nuts on right side of vehicle are right hand threads turn left to loosen turn right to tighten 3 Loosen wheel nuts on wheel to be removed 4 Place jack in position subparagraph a WARNING Hydraulic jack is intended only for lifting truck not for supporting vehicle to perform maintenance Do not get under truck after it is raised unless it is properly supported with blocks or ja
15. tr m 1 gt ul gt VIEW H SEATS OIL CAN POINTS OIL CAN 7 POINTS 10 9 2320 303 10 VIEW SPARE WHEEL AND CARRIER NOTES 1 FRONT AXLE WHEEL BEARINGS Daily check that level of gear lubricating oil is visible in sight glass If oil is not visible remove rubber plug and add GO until level is even with plug opening Install rubber plug 2 POWER STEERING RESERVOIR Daily with engine running and fluid at operating temperature remove dipstick from reservoir and check level of lubricating oil on dipstick Add OE HDO to bring level above the ADD mark on dipstick 3 RADIATOR WARNING Let radiator cool remove removing cap Remove cap in two steps First place thick cloth over cap and slowly turn cap left OIL CAN POINTS to its first stop pause and allow pressure to escape from cooling system Then turn cap further left until you can remove it Failure to follow this procedure can result in serious burns Daily with engine cool remove radiator cap Check level of coolant in radiator Coolant must be within 2 1 2 in 6 4 cm below filler neck coolant to correct level Install radiator cap 4 ENGINE CRANKCASE Daily check level of lubricating oil Wait 10 minutes after shutting down engine to allow oil to drain back into crankcase To ensure an accurate reading vehicle must be parked on level ground Safe operating level is between ADD and FULL
16. 2 7 9 2320 303 10 2 2 INSTRUMENT PANEL Con t c Lower Control Panel 26 Controlorindicator Function Ignition Switch Operates gages switches sending units instrument panel lights and engine start Turn key in switch to right for ON position Turn key fully counterclockwise to activate accessories Turn key to center vertical position to turn all systems OFF Engine Start Button Press to energize starter solenoid Release button as soon as engine starts Utility Light Switch ON OFF toggle switch controls utility lights mounted on back of cab Up position is ON Down is OFF Ether Quick Start Button Press and release button to manually inject ether for starting in cold weather Panel Lights Control Knob Brightens or dims instrument panel lights Turn clockwise to brighten and counterclockwise to dim Turn fully counterclockwise to shut off panel lights Beacon Light Switch ON OFF toggle switch controls beacon warning light on top of vehicle Pro Link Connector Used to connect Pro Link to fault isolate ABS transmission and CWS by Unit Maintenance 9 2320 303 10 INSTRUMENT PANEL Con t d Lower Right Dash Panel 27 28 29 Wiper Washer Control Mirror Heat Switch Auxiliary Heater Indicator Light if equipped Auxiliary Heater Control Switch if equipped HI LO Switch if equipped FRESH RECIRC Air Button Fan Switch Mode Control Lever Temperature Co
17. 53 Table 2 1 TM 9 2320 303 10 Preventive Maintenance Checks and Services PMCS for M915A4 Con t Item To Check Service Weekly Axle Brea thers Not Fully Mission Procedure Capable If WARNING Dry cleaning solvent is toxic and flammable Always wear protective goggles and gloves and use only in a well ventilated area Avoid contact with skin eyes and clothes and DO NOT breathe vapors DO NOT use near open flame or excessive heat The solvent s flash point is 100 F 138 F 38 C 59 C If you become dizzy while using cleaning solvent immediately get fresh air and medical help If solvent contacts eyes immediately wash your eyes and get medical aid NOTE Perform the following service at all axles except the front axle Without removing breather vent 61 check for a clogged vent Clean with dry cleaning solvent ltem 16 Appendix D as required to remove dirt and grease 2 55 9 2320 303 10 Table 2 1 Preventive Maintenance Checks Services PMCS for M915A4 Con t Location EE To Check Not Fully Mission Interval Service Procedure Capable If 54 Weekly Brake NOTE Cham bers Perform the following check at all axles Check brake chamber Stroke alert indicator is Service pushrod for visible showing of stroke alert indicator 62 55 Weekly Pintle Check pintle hook 64 for Hook looseness damaged locking mechanism and presence of
18. After After TM 9 2320 303 10 Table 2 1 Preventive Maintenance Checks and Services PMCS for M915A4 Con t Location ETE To Check Service Overall View Wheels and Tires Fifth Wheel Ramps Taillights Trailer Gladhands Mud Flaps Procedure Check for damage to rear service blackout lights marker clearance lights e Check for damage to exhaust System components Ensure that components Ensure that components are securely mounted and are not leaking f Check CWS antenna and side sensor for obvious damage Not Fully Mission Capable If d Lights are damaged e Exhaust system components are damaged WARNING Operating truck with an underinflated or defective tire may lead to tire failure and loss of steering control injury to personnel ma Visually check all right side tires for defects underinflation or loose or missing wheel studs lug nuts Check for damage to fifth wheel ramps 44 Check for taillights 41 damage to Check for presence of dummy couplings 42 and damage to trailer gladhands 40 Check for presence and general condition of mud flaps 43 Damage to equipment or result Tire is missing or deflated unserviceable or two or more wheel studs or lug nuts are missing Damage that coupling prevents Taillights are damaged Damage that prevents air from applying trailer brakes when coupled
19. Mud flaps are missing 9 2320 303 10 Table 2 1 Preventive Maintenance Checks Services PMCS for M915A4 Con t Item To Check Not Fully Mission Interval Service Procedure Capable If 34 After Mud Con t Flaps 2 43 35 2 44 Interval After Table 2 1 TM 9 2320 303 10 Preventive Maintenance Checks and Services PMCS for M915A4 Con t Item To Check Service Fuel Tank Not Fully Mission Procedure Capable If WARNING DO NOT smoke or permit any open flame in area of truck while servicing diesel fuel system Be sure hose nozzle is grounded against filler tube during refueling to prevent static electricity Failure to follow this warning may result in injury to personnel or equipment damage Check for presence a Filler cap is missing or and condition of fuel damaged filler cap 46 Check fuel tank 45 b Class fuel leaks are for leaks damage and evident security of mounting c Remove fuel tank filler cap 46 and fill fuel tank 45 to holes approximately 3 in 7 6 cm in filler neck Ensure that filler cap is free of debris and other material that could interfere with air venting Install filler cap paragraph 3 6 9 2320 303 10 Table 2 1 Preventive Maintenance Checks Services PMCS for M915A4 Con t Item To Check Not Fully Mission Service Procedure Capable If 36 After Front Check that lubricating oil Axle is v
20. a Gage reading is not within limits b Gage reads less than 65 psi 448 kPa yellow band warning buzzer stays on or gage is not operating c Needle is in yellow or red band e Indicator window shows 20 in of water Vehicle moves with parking brake applied 9 2320 303 10 Table 2 1 Preventive Maintenance Checks Services PMCS for M915A4 Con t Location ETE To Check Service Service Brakes m Interval Before Trailer Brakes Before Instru ment Panel CWS Displays During Brakes Procedure Not Fully Mission Capable If D transmission in Drive Vehicle moves with service release parking brake brakes applied apply service brakes Vehicle should not move NOTE Perform this check with trailer after tractor trailer are coupled Listen for air leaks at intervehicular connecting hoses relay valve and air reservoirs Apply trailer brakes only and attempt to move tractor trailer combination Monitor all gages and indicator and warning lights Check that engine coolant transmission oil temperature gages register within normal range green band Monitor indicator lights on driver s display unit and side sensor display If system fail light illuminates continue mission and turn CWS off Notify supervisor Check brakes for pulling or grabbing Check that brake pedal is firm and does not fully depress to
21. e Carbon monoxide is a colorless odorless deadly poison which when breathed deprives the body of oxygen and causes suffocation Exposure to air containing carbon monoxide produces symptoms of headache dizziness loss of muscular control apparent drowsiness and coma Permanent brain damage or death can result from severe exposure Carbon monoxide occurs in exhaust fumes of internal combustion engines Carbon monoxide can become dangerously concentrated under conditions of inadequate ventilation The following precautions must be observed to ensure safety of personnel when engine of truck is operated DO NOT operate truck engine in enclosed areas DO NOT idle truck engine without adequate ventilation DO NOT drive truck with inspection plates or cover plates removed BE ALERT for exhaust poisoning symptoms They are e Headache e Dizziness e Sleepiness e 1055 of muscular control If you see another person with exhaust poisoning symptoms Remove person from area Expose to fresh air Keep person warm Do not permit physical exercise Administer cardiopulmonary resuscitation CPR if necessary Notify a medic BE AWARE The field protective mask for nuclear biological chemical NBC protection will not protect you from carbon monoxide poisoning The Best Defense Against Carbon Monoxide Poisoning Is Good Ventilation 9 2320 303 10 WARNING BATTERIES To avoid eye injury eye protection is required when
22. Cab Floor Mounted Controls Cage and Brakes Characteristics Capabilities and Features Equipment Cleaning Veliicle etae Leere coat erede entere Collision Warning System 5 Controls and Indicators AGGITIOMA Instrument Controls Steering Wheel and Column Mounted Cooling System Principles of Operation Corrosion Prevention and Control Couple to GHOCKS iii Data EQUIPMENT EEEE EE Destruction of Army Materiel to Prevent Enemy Use Drive Train Principles of Operation meer Driving Mge Index 1 9 2320 303 10 Subject Paragraph Page E Electrical System Principles of Operation 1 17 Engine Shut DOR oreste kia 2 12 2 64 Equipment Characteristics Capabilities and Features Exhaust System Principles of
23. Notify Unit Maintenance 9 2320 303 10 2 2 INSTRUMENT PANEL Con t 2 Center Gage Panel 5 Tachometer 6 Speedometer Odometer Registers engine speed in rpm Maximum governed speed is 2100 rpm Idle speed is 600 rpm Registers vehicle ground speed mph kph speedometer distance traveled seven digit odometer in miles 2 3 2 2 10 11 9 2320 303 10 INSTRUMENT PANEL Con t 3 Right Gage Panel Primary Air Pressure Gage Secondary Air Pressure Gage Air Cleaner Restriction Indicator Gage Transmission Oil Temperature Gage Fuel Gage Registers air pressure in psi in rear brake system Normal operating range is 90 120 psi 621 827 kPa Registers air pressure in psi in front brake system Normal operating range is 90 120 psi 621 827 kPa Indicates air cleaner air flow is adequate if gage is clear If restricted indicator window will show up to 20 inches of water Push yellow reset button to reset after air cleaner has been serviced Indicates oil temperature in transmission Normal range in green band is 600 200 F 71 93 C If needle goes into yellow band or red band stop and investigate cause Indicates amount of fuel in fuel tank when ignition switch is turned on 2 2 9 2320 303 10 INSTRUMENT PANEL Con t b Upper Right Dash Panel Control or Indicator Air Vents Engine Jake Brake Selection Switches Fifth Whe
24. Step 1 Ensure system has had enough time to disengage Leave interaxle lockout control valve lever in UNLOCKED position and wait for light to go off Step 2 Excessive driveline windup may have occurred Back truck up slowly If driveline does not disengage notify Unit Maintenance 3 7 9 2320 303 10 Table 3 1 Troubleshooting Con t MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION ELECTRICAL SYSTEM 6 ONE OR MORE LIGHTING SYSTEMS NOT WORKING Step 1 Check position of switch es If vehicle is coupled to semitrailer and problem is with semitrailer lighting system check intervehicular cable connection Place switch es in ON position and blackout light switch to NORMAL position Connect intervehicular cable Step 2 Perform semitrailer troubleshooting ENGINE 7 ENGINE COOLANT TEMPERATURE GAGE INDICATES ENGINE IS OVERHEATING WARNING DO NOT remove radiator cap unless engine is cold Remove radiator cap in two steps First place a thick cloth over cap and slowly turn cap left to first stop Pause and allow pressure to escape Turn cap further left until it can be removed This is a pressurized cooling system and escaping steam hot water or coolant will cause serious burns Step 1 Check engine coolant level in radiator Add engine coolant as required Appendix Step 2 Check system for leaks If leaks are found notify Unit Maintenance Step 3 Check f radiator cooling fins are free of mud snow ice or de
25. TACOMHRI 1 Rock Island Arsenal Rock Island IL 61299 7630 The e mail address is TACOM TECH PUBS ria army mil The fax number is DSN 793 0726 or Commercial 309 782 0726 TABLE OF CONTENTS Page CHAPTER 1 nenne General Informations aaa ptu daas 1 1 Equipment Description and Data 1 5 Section Principles of 1 13 CHAPTER 2 OPERATING INSTRUCTIONS Description and Use of Operator s Controls and Indicators 2 1 Preventive Maintenance Checks and Services PMOS eana 2 19 Approved for public release distribution is unlimited Section lt CHAPTER 3 Section APPENDIX APPENDIX APPENDIX APPENDIX APPENDIX APPENDIX TM 9 2320 303 10 TABLE OF CONTENTS Con t Page Operation Under Usual Conditions 2 55 Operation Under Unusual Conditions 2 77 OPERATOR Lubrication Instructions seesssssssssseess 3 1 Troubleshooting 3 3 Maintenance Procedures 3 13 HEFERENGES 2 2 respeto COMPONENTS OF END ITEM AND BASIC ISSUE ITEMS LISTS ADDITIONAL AUTHORIZATION LIST
26. bends 2 57 Interval 2 58 TM 9 2320 303 10 Table 2 1 Preventive Maintenance Checks and Services PMCS for M915A4 Con t Item To Check Service CAB INTERI OR Windows OVER ALL VEHICLE Under carriage Frame Cab and Propeller Shafts Air System Exhaust System Spare Wheel and Tire and Vehicle Tires Procedure Check operation general condition of cab doors and windows a Check for obvious damage to frame and undercarriage Check propeller shafts and U joints for loose or broken bolts and nuts Check all air lines fittings and valves for looseness or damaged Check exhaust system for corrosion looseness or damage a Check spare wheel and tire for cuts gouges cracks or uneven wear Check for secure mounting of spare wheel and tire Check all vehicle tires for cuts gouges cracks or uneven wear Not Fully Mission Capable If Any loose or broken frame side rails crossmembers broken welds or broken bolts are found Mounting bolts and nuts are loose or missing Any air lines fittings or valves are loose or damaged Pipe clamp hardware damaged or missing a Spare wheel and tire are missing or damaged c Any tire is missing or damaged 9 2320 303 10 Table 2 1 Preventive Maintenance Checks Services PMCS for M915A4 Con t Item To Check Not Fully Mission Interval Service Proced
27. mu t Extin missing seal 16 guisher 2 31 9 2320 303 10 Table 2 1 Preventive Maintenance Checks Services PMCS for M915A4 Con t Location EE To Check Not Fully Mission Interval Service Procedure Capable If Before Engine a poo n engine a Engine will not start Low Startup baa EE 2 air pressure or warning Verify that po air light warning buzzer pressure warning light stay on 17 and warning buzzer turn off b Check that ABS indicator lights 18 turn off after 4 second self test If not notify supervisor ee FASTEN SEAT BELT CAUTION DO NOT run engine above idle speed until oil pressure gage indicates at least 15 psi 100 kPa at idle speed c Check engine rpm c At idle engine speed is tachometer not 600 rpm 2 32 9 2320 303 10 Table 2 1 Preventive Maintenance Checks Services PMCS for M915A4 Con t Item To Check Not Fully Mission Interval Service Procedure Capable If 9 Before Seats a Check seats and seat a Seat belts and Seat belts for security of serviceable Belts mounting and damage NOTE All adjustments should be made while seated Primary air pressure gage must indicate a minimum of 60 psi 414 kPa to adjust height of seat Check for proper b Seat missing operation of inoperative height adjustment valve lever 21 and fore and aft se
28. twice per second Orange Accompanied This indicator illuminates when an object is detected with Yellow within a 3 second interval of vehicle opening or closing 1 to 2 seconds following interval with vehicle opening and no tone and 1 to 2 seconds following interval with vehicle closing accompanied by a tone Yellow This indicator illuminates when an object is detected within the system s maximum range Maximum range is 350 feet on straight roads and is reduced on curved roads by the road turn radius It also illuminates when the proximity alarm threshold is crossed Red System Failure Lights when a problem has been detected in the forward looking radar system pattern of flashes blink out the faults that are stored in memory when activated by holding in the volume control knob for five seconds 2 22 9 2320 303 10 2 6 ADDITIONAL CONTROLS AND INDICATORS Con t Table 1 Miscellaneous Tones Light Tones Description Fail One Low Tone Sounded when the system diagnostics detect a failure One Tone Each time the volume control is turned a single tone is sounded 2 23 9 2320 303 10 2 6 ADDITIONAL CONTROLS AND INDICATORS Con t h CWS Side Sensor Display Red Vehicle Detected Light Sensor Yellow No Vehicle Detected Red and Yellow 2 24 Indicator light that illuminates after objects have been detected by the side sensor When the right turn signal is activated and the side sensor
29. 1292 9 2320 303 10 Section BASIC ISSUE ITEMS Con t 11 1 2 3 4 5 6 Illus National Description Usable Qty Number Stock Number CAGEC Part Number on Code U I Handle Wrench EA 1 in BII storage box 34623 44201 6150 00 772 8814 Harness Assy 12 ft 24 EA 1 volt in BII storage box 19207 7728814 4910 01 407 2953 Hose Pneumatic Tire EA 1 Inflation with Gauge 40 ft in BII storage box 19207 11677140 7 B 5 9 2320 303 10 Section BASIC ISSUE ITEMS Con t 1 2 3 4 5 Illus National Description Usable Number Stock Number CAGEC Part Number on Code U I EA 5120 01 146 8096 Jack Hydraulic 12 Ton w Handle in BII storage box 08844 JH 12 6220 01 327 3225 Lamp Work Portable 12 volt 25 ft Cord in BII storage box 78422 1401152 5120 01 398 7966 Pliers Combination Gen eral Purpose in BII storage box 72368 J26 5120 00 227 7356 Screwdriver Flat Tip in BII storage box 64067 5120 00 227 7356 5120 00 234 8913 Screwdriver Crosstip in BII storage box 75347 BD122 9 2320 303 10 Section BASIC ISSUE ITEMS Con t 1 2 3 4 6 National Description Usable Qty U I Number Stock Number CAGEC Part Number on Code 19 9905 00 148 9546 Triangle Folding Reflective EA in BII storage box 19207 11669000 5120 00 240 5328 Wrench Adjustable 8 in EA long in BII storage box 19207
30. 81349 MIL L 46167 1 Quart Can 5 Gallon Drum 55 Gallon Drum OIL Lubricating Internal Combustion Engine OE HDO 10 81349 MIL L 2104 1 Quart Can 5 Gallon Can 55 Gallon Drum OIL Lubricating Engine OE HDO 15W 40 81349 MIL L 2104 1 Quart Can 5 Gallon Can 55 Gallon Drum 9 2320 303 10 Section EXPENDABLE AND DURABLE ITEMS LIST Con t 1 2 3 4 Item National Description Number Level Stock Number CAGEC Part Number 13 C OIL Lubricating Internal Combustion Engine OE HDO 30 81349 MIL L 2104 9150 00 186 6681 1 Quart Can 9150 00 188 9858 5 Gallon Can 9150 00 189 6729 55 Gallon Drum OIL Lubricating Internal Combustion Engine OE HDO 40 81349 MIL L 2104 9150 00 189 6730 1 Quart Can 9150 00 188 9860 5 Gallon Can 9150 00 188 9862 55 Gallon Drum RAG Wiping 64067 7920 00 205 1711 7920 00 205 1711 50 Pound Bale SOLVENT Dry Cleaning Type II 81348 P D 680 6650 00 110 4498 1 Pint Can 6650 00 664 5685 1 Quart Can 6650 00 281 1985 1 Gallon Can 6850 00 274 5421 5 Gallon Can 6850 00 285 801 1 55 Gallon Drum TAPE Reflective 2 Inches Wide 81346 ASTM 04956 9390 00 174 2322 1800 Inch Roll D 4 9 2320 303 10 APPENDIX E STOWAGE AND DECAL DATA PLATE AND STENCIL GUIDE E 1 SCOPE This appendix shows the location for stowage of equipment and material required to be carried on the M915A4 b This appendix also includes illustrations showing the lo
31. Compressed air used for cleaning or drying purposes or for clearing restrictions should never exceed 30 psi 207 kPa Wear protective clothing goggles shield gloves etc and use caution to avoid injury to personnel WARNING DIESEL FUEL HANDLING DO NOT smoke or permit any open flame in area of truck while you are servicing diesel fuel system Be sure hose nozzle is grounded against filler tube during refueling to prevent static electricity Failure to follow this warning may result in injury to personnel or equipment damage Auxiliary arctic heater must be switched to OFF while refueling Fuel may ignite causing damage to vehicle and injury or death to personnel DO NOT perform fuel system checks inspections or maintenance while smoking or near fire flames or sparks Fuel may ignite causing damage to vehicle and injury or death to personnel 9 2320 303 10 Fuel tank may become hot during vehicle operation Use hand protection when removing fuel cap WARNING DRY CLEANING SOLVENT Dry cleaning solvent is toxic and flammable Always wear protective goggles and gloves and use only in a well ventilated area Avoid contact with skin eyes and clothes and DO NOT breathe vapors DO NOT use near open flame or excessive heat The solvent s flash point is 100 F 138F 38 C 59 C If you become dizzy while using cleaning solvent immediately get fresh air and medical help If solvent contact eyes immediately
32. F Horns NOTE Vehicle operation with inoperative horn may violate AR 385 55 If tactical situation permits check operation of electrical and air horns Acces Verify that windshield sory wipers and Items heater ventilator air conditioner operate Lights NOTE Vehicle operation with damaged or inoperative headlights or stoplights may violate AR 385 55 2 49 9 2320 303 10 Table 2 1 Preventive Maintenance Checks Services PMCS for M915A4 Con t Item To Check Not Fully Mission Interval Service Procedure Capable If a Check for presence and operation Service drive turn signal blackout marker blackout drive marker clearance lights Check operation of tail stoplights Depress brake pedal approximately 1 4 in 64 Tail stoplights should come on Check for loose a Any drive belt is loose missing broken missing broken cracked frayed cracked to the belt fiber has more drive belts 55 Notify than one crack 1 8 in 3 2 supervisor if loose mm in depth or has frays drive belts are more than 2 in 5 1 suspected long Check for damaged b Pulley is damaged pulleys 54 2 50 9 2320 303 10 Table 2 1 Preventive Maintenance Checks Services PMCS for M915A4 Con t Item To Check Not Fully Mission Interval Service Procedure Capable If 45 Weekly Ether WARNING Quick Ether is highly flammable an
33. Grams 2 2 Pounds 1 Metric Ton 1000 Kilograms 1 Megagram 1 1 Short Temperature Tons 5 9 F 32 C Liquid Measure 212 Fahrenheit is equivalent to 100 Celsius 90 Fahrenheit is equivalent to 32 2 Celsius 32 Fahrenheit is equivalent to 0 Celsius 1 Milliliter 0 001 Liters 0 0338 Fluid Ounces 1 Liter 1000 Milliliters 33 83 Fluid Ounces 9 5 32 F APPROXIMATE CONVERSION FACTORS To Change To Multiply By To Change To Multiply By e eo Tix poe Ec Quarts Liters Liters Quarts 9 2320 303 10 079294 000
34. Procedure Capable If NOTE Review all WARNINGS CAUTIONs and NOTES before performing PMCS and operating the truck Perform all PMCS checks if a You are the assigned operator but have not operated the truck since the last weekly inspection You are operating the truck for the first time Before Check under truck for a Class Ill oil coolant or i evidence of fluid hydraulic leaks or Class 11 leakage such as oil fuel leaks are evident coolant fuel or hydraulic fluid Check truck for b Damage that would impair obvious damage that operation is evident would impair operation Visually check for c Any tire is missing or missing or damaged damaged Lug nuts are ties Check lug nuts loose or missing to ensure they are at least finger tight Before Cab Check for damage to Damage that would interfere Exterior lights 9 spotting mirrors with visibility impair 1 side mirror 4 operation is evident windshield 2 windshield wipers and blades 3 cab door 8 grabhandle 5 battery box 7 and steps and CWS antenna 10 Before Spare Check for presence and Spare wheel and tire is Wheel condition of spare wheel missing or damaged and Tire and tire 6 2 28 9 2320 303 10 Table 2 1 Preventive Maintenance Checks Services PMCS for M915A4 Con t Item To Check Not Fully Mission Interval Service Procedure Capable If 3 Before Spare Wheel and T
35. and recommended intervals for lubrication by the operator crew Any special lubrication Instructions required for specific components are contained in the NOTES section of the chart c The KEY and CHARTs A through C provide information needed to select the proper lubricant for various temperature ranges and uses and identify the interval d Recommended intervals are based on normal conditions of operation temperature and humidity When operating under extreme conditions lubricants should always be changed more frequently When in doubt notify your supervisor F 2 SPECIFIC LUBRICATION INSTRUCTIONS a Keep all lubricants in a closed container and store in a clean dry place away from extreme heat Keep container covers clean and do not allow dust dirt or other foreign material to mix with lubricants Keep lubrication equipment clean and ready for use b Maintain a record of lubrication performed and report any problems noted during lubrication Refer to DA Pam 738 750 for maintenance forms and procedures to record and report any findings Keep all external parts of equipment not requiring lubrication free of lubricants After lubrication wipe off excess lubricant to prevent accumulation of foreign matter d Refer to FM 9 207 for lubrication instructions in cold weather F 1 9 2320 303 10 LUBRICATION CHART TRUCK TRACTOR LINE HAUL 52 000 GVWR 6 X 4 M915A4 NSN 2520 01 458 1207 This Lubrication Char
36. at heater inlet reaches 176 F 80 LO position is suitable when heater operates over an extended period 3 Place HI LO switch 4 to desired setting 4 turn heater off place AUX switch 2 to OFF position Heater burner will stop and AUX HTR light will go out within a few minutes Blower will continue to run for approximately 90 seconds 2 34 OPERATE IN EXTREME HEAT a General During very hot weather driving procedures may require altering to prevent vehicle overheating Avoid continuous high speeds long hard pulls and continuous operation in soft terrain 2 93 9 2320 303 10 2 34 OPERATE IN EXTREME HEAT Con t b Driving Vehicle 1 Check water temperature gage and stop if temperature is unusually high Allow vehicle to cool down 2 Check cooling system air cleaner air cleaner restriction indicator engine oil level and radiator fins frequently Perform necessary services and notify Unit Maintenance of any unusual gage readings or problems 3 Notify Unit Maintenance to shorten differential oil change interval c Parking Vehicle 1 vehicle under cover if possible If shelter is not available cover vehicle with tarpaulins If there aren t enough tarps to cover entire vehicle arrange tarps around engine compartment and over radiator to keep sand and dust out Cover window glass to protect against sand blasting 2 Ensure all tires are inflated to proper pressure
37. bumper 4 2 83 9 2320 303 10 2 28 OPERATE TILTABLE HOOD a Open Tiltable Hood 1 Unlock hood retaining strap 3 from hood locking bracket 4 2 Repeat step 1 for opposite side 3 Grasp hand slot 1 at top front center of hood 2 and rotate hood to open position 2 84 9 2320 303 10 2 28 OPERATE TILTABLE Con t WARNING ALWAYS install hood props after opening hood Failure to follow this warning could result in severe injury to personnel On side of radiator 5 remove hood prop rod 6 from bracket Rotate hood prop rod 6 froward and install rod end in slot provided on hood bracket 7 4 5 6 Repeat steps 4 and 5 for opposite side b Close Tiltable Hood 1 Remove hood prop rod 6 end from hood bracket 7 2 Rotate hood prop rod 6 rearward and secure in bracket on side of radiator 5 3 Repeat steps 1 and 2 for opposite side 4 Grasp hand hold 1 at top front center of hood 2 and lower hood to closed position 2 85 9 2320 303 10 2 28 OPERATE TILTABLE Con t 5 Lock retaining strap 3 on hood locking bracket 4 6 Repeat step 5 for opposite side 2 86 9 2320 303 10 Section IV OPERATION UNDER UNUSUAL CONDITIONS Paragraph Page Number Paragraph Title Number G n ral Slave Start TOW TRUCK quM
38. detects an object the red indicator light comes on and the driver display unit speaker sounds a double tone The tone is sounded only once per activation of the turn signal Lights if a failure of the side sensor occurs and if the criteria for heavy rain is met Photo sensor that senses ambient light and adjusts intensity of the indicator lights accordingly i e increases brightness of indicator lights in daytime and decreases brightness of indicator lights at nighttime Indicator light stays on when no objects are detected by the side sensor Indicates the side sensor is temporarily unable to detect objects in heavy rain 9 2320 303 10 Section PREVENTIVE MAINTENANCE CHECKS AND SERVICES PMCS Paragraph Page Number Paragraph Title Number EC MNNNMRTE m Explanation of Table General PMCS 2 26 Preventive Maintenance Checks and Services PMCS one ate dam Ea Ed da etai d d a cid 2 28 2 7 GENERAL To ensure that the truck is ready for operation at all times it must be inspected on a regular basis so that defects may be found and corrected before they result in serious damage equipment failure or injury to personnel Table 2 1 contains systematic instructions on inspections adjustments and corrections to be performed by the operator crew to keep your equipment in
39. marks on dipstick As required add OE HDO through filler opening DO NOT overfill F 11 TRANSMISSION CAUTION Transmission must not be operated for extended periods of time until a Hot Check has verified proper fluid level Transmission damage can result from extended operation at improper fluid level conditions COLD OIL CHECK COLD RUN BAND Run engine for one minute at idle speed Idle engine in Neutral until transmission reaches 60 120 F 16 49 C Shift transmission to Drive D then Reverse R then return to N Remove dipstick from oil filler tube wipe clean and check oil level Oil registering in the COLD RUN band indicates a sufficient quantity of oil to safely operate the transmission until temperature reaches 160 200 F 71 93 C If fluid level is not within COLD RUN band add or drain fluid as required to bring level within the band When temperature reaches 160 200 F 71 93 C a hot oil check MUST be performed HOT OIL CHECK HOT RUN BAND Be sure temperature has reached 160 200 F 71 93 C With truck on level ground engine idling and transmission in Neutral N remove dipstick from oil filler tube wipe clean and check oil level If oil registers in the HOT RUN band quantity of oil in transmission is safe for operating the F 12 TM 9 2320 303 10 vehicle If it registers or below the bottom line of the HOT RUN band add the required amount of oil to br
40. nuts must be torqued to the required torque Failure to follow this warning may result in serious injury to personnel and damage to equipment Tighten wheel nuts with wheel wrench After 25 miles 40 km retighten wheel nuts Within next 75 miles 121 km have Unit Maintenance torque wheel nuts to proper torque Tightening pattern is identical for all wheel assemblies 3 20 9 2320 303 10 3 9 WHEEL TIRE ASSEMBLY REPLACEMENT Con t 5 For front or outer rear tire tighten wheel nuts according to tightening pattern WHEEL NUT TIGHTENING PATTERN 6 If replacing inner rear tire alternately tighten inner wheel nuts by removing outer wheel nut according to tightening pattern and tighten inner wheel nut After tightening inner wheel nut reinstall outer wheel nut and tighten according to tightening pattern 7 Notify Unit Maintenance as soon as possible to apply proper torque 8 Stow defective tire in spare wheel and tire carrier and have it replaced or repaired as soon as possible 9 Remove wheel blocks 3 21 9 2320 303 10 3 10 BATTERY BOX COVER REPLACEMENT WARNING To avoid eye injury eye protection is required when working around batteries Do not smoke use open flame make sparks or create other ignition sources around batteries If a battery is giving off gases it can explode and cause injury to personnel Remove all jewelry such as rings ID tags watches and bracelets If j
41. on high beams Lift lever again to turn high beams off 2 Electric Horn Push to activate Used instead of air horn in normal city driving 3 Steering Wheel Turn clockwise to turn vehicle right and counterclockwise to turn vehicle left 4 Trailer Brake Hand When pulled rearward activates trailer brakes Control Valve Lever 5 Tilt Steering Wheel Push down on lever to change tilt of steering column and Control Lever wheel Release lever to lock tilt adjustment in position To adjust height of steering wheel pull up on lever Release lever to lock height adjustment in position 6 Hazard Signal Switch Located under the turn signal Move switch out left to activate hazard lights Move turn signal lever forward or rearward to deactivate hazard lights 9 2320 303 10 2 4 FLOOR MOUNTED CONTROLS e f Ry Pii AM 5 N 2 AER Control or Indicator Accelerator Pedal Depress to increase engine speed Release to decrease engine speed Brake Pedal Depress to apply service brakes on truck and if properly coupled to a trailer trailer service brakes Release to release service brakes 2 4 9 2320 303 10 FLOOR MOUNTED CONTROLS Con t Controlorindicator Function Transmission Pushbutton Shifts automatic transmission Range select positions Shift Selector are Reverse R Neutral and Drive D In D selection of a specific gear can be accom
42. position Tighten three screws f Occupy and adjust seat see paragraph 2 5 g Adjust steering wheel seelparagrar WARNING Use of seat belts while operating vehicle is mandatory Fasten belt BEFORE driving Trying to fasten three point seat belt while driving creates a hazardous condition Failure to follow this warning may result in death or injury to personnel h Adjust tether belt 1 Loosen tether belt 6 and turn buckle 5 at a right angle to webbing Pull buckle away from inner webbing 2 62 9 2320 303 10 2 11 INITIAL ADJUSTMENTS DAILY CHECKS AND SELF TESTS Con t 2 Tighten tether bet 6 to proper tension Ensure that movement of seat suspension is not restricted i Fasten seat belt 1 Slowly pull link 9 out of retractor 10 and across lap far enough to engage buckle 5 If retractor locks too soon allow belt to retract slightly and then pull slowly 2 Push link 9 into buckle 5 3 Position shoulder strap 8 diagonally across chest NOTE e If engaging Komfort Loc allow no more than 1 in 2 5 cm between chest and shoulder strap Komfort Loc amp will automatically release if pressure is applied to shoulder strap 4 If desired engage Komfort Loc 7 by pulling on shoulder strap 8 and pressing Komfort Loc lever up 5 release seat belt press release button on buckle 5 If Komfort Loc 7 was engaged give shoulder strap 8 a quick downward tug
43. return to idle speed This procedure can be continued as long as each directional shift moves vehicle a greater distance If not vehicle should be towed from its position 2 Stopping a Ease on accelerator leaving vehicle in gear b Apply service brakes lightly and evenly DO NOT pump service brake pedal WARNING Do not use engine brake if road surfaces are slippery Using engine brake on wet icy or snow covered roads could result of loss of vehicle control Failure to follow this warning could result in death or injury to personnel or damage to equipment c Always avoid sudden braking and use of engine brake on slick roads CAUTION Care must be exercised if tractor or trailer ABS light comes on while driving possibly indicating an ABS malfunction Although the regular normal vehicle system is still fully operational you should continue at a speed no greater than 40 mph 64 kph until the mission is complete When the mission is complete report to Unit Maintenance to clear the ABS fault and restore full ABS capabilities d During emergency or reduced traction stops press brake pedal fully until vehicle comes to a safe stop DO NOT PUMP brake pedal With brake pedal fully depressed ABS will control all wheels to provide steering control and a reduced braking distance 2 98 9 2320 303 10 2 39 OPERATE ON SNOW OR ICE Con t 3 Parking If parking on icy slushy wet or muddy surfaces place boar
44. the end item whenever it is issued or transferred between property accounts Illustrations are furnished to assist you in identifying the items b Section Basic Issue Items These are the minimum essential items required to place the truck in operation to operate it and to perform emergency repairs Although shipped separately packaged BII must be with the truck during operation and whenever it is transferred between property accounts The illustrations will assist you with hard to identify items This manual is your authority to request requisition replacement BII based on TOE MTOE authorization of end item B 3 EXPLANATION OF COLUMNS Below is an explanation of columns found in the tabular listings a Column 1 Illustration Number Illus Number This column indicates the number of the illustration that shows the item b Column 2 National Stock Number Indicates the National Stock Number NSN assigned to the item and will be used for requisitioning purposes B 1 9 2320 303 10 3 EXPLANATION COLUMNS Con t c Column 3 Description and Usable On Code Indicates the Federal item name and if required a minimum description in parentheses to identify and locate the item The entry for each item ends with the Commercial and Government Entity Code in parentheses followed by the part number Usable on Code indicates the vehicle to which the item is assigned Usable on Code is not applica
45. to release 2 63 2 12 START ENGINE NOTE TM 9 2320 303 10 Refer to paragraph 2 2 for the location of instrument panel controls and indicators a Ensure that parking brake is applied paragraph 2 2 b Depress transmission shift selector Neutral N pushbutton c Ensure that all accessories are off and engine brake system switches are in OFF Down position d Turn ignition switch to ON position Low air pressure warning light PARK BRAKE light if applied ABS light s and warning buzzer come on ABS light s will go off after passing a four second self test e Ensure that interaxle lockout control valve lever is in UNLOCK position CAUTION DO NOT operate starter motor for more than 30 seconds at a time After 30 seconds allow starter motor to cool for at least two minutes before attempting to start engine again Excessive heating of starter motor may result in damage or early starter failure f Press engine start button NOTE Fuel filter water separator is located in engine compartment on left side frame rail 0 When engine starts release engine start button If engine fails to start prime fuel system by pumping fuel filter water separator valve 1 for one minute Press engine start button If engine still fails to start pump valve for 20 seconds Press engine start button If engine still fails to start notify Unit Maintenance 2 64 9 2320 303 10 2 12 START ENGINE Co
46. truck tractor is a 6 X 4 prime mover of semitrailers used primarily to transport containers bulk cargo and petroleum products over primary and secondary roads under worldwide climatic conditions in a military environment 1 2 MAINTENANCE FORMS AND PROCEDURES Department of the Army forms and procedures used for the equipment will be those prescribed by DA Pam 738 750 Functional Users Manual for the Army Maintenance Management System TAMMS as contained in the Maintenance Management Update 1 1 9 2320 303 10 1 3 CORROSION PREVENTION AND CONTROL CPC a Corrosion Prevention and Control CPC of Army materiel is a continuing concern It is important that any corrosion problems with this item be reported so that the problem can be corrected and improvements can be made to prevent the problem in future items b While corrosion is typically associated with rusting of metals it can also include deterioration of other materials such as rubber and plastic Unusual cracking softening swelling or breaking of these materials may be a corrosion problem If a corrosion problem is identified it can be reported using SF Form 368 Product Quality Deficiency Report Use of key words such as corrosion rust deterioration or cracking will ensure that the information is identified as a CPC problem The form should be submitted to the address specified in DA Pam 738 750 1 4 DESTRUCTION ARMY MATERIEL TO PREVENT ENEMY USE F
47. using a mild solution of warm water and soap never use solvents or abrasives Wipe all washed areas dry 9 2320 303 10 3 6 REFUELING WARNING DO NOT smoke or permit any open flame in area of truck while you are servicing diesel fuel system Be sure hose nozzle is grounded against filler tube during refueling to prevent static electricity Failure to follow this warning may result in injury to personnel or equipment damage e Auxiliary arctic heater if equipped must be switched to OFF while refueling e Place portable fire extinguisher within reach prior to refueling Fuel tank may become hot during vehicle operation Use hand protection when removing fuel cap DO NOT overfill fuel tank e If fuel starts foaming from fuel tank stop immediately to avoid fuel spillage e Failure to follow these warnings could result in injury or death to personnel a Shut down engine paragraph 2 16 b Ensure that auxiliary arctic heater if equipped is switched to OFF 2 32 Wipe off dirt on and around fuel filler cap 1 d Remove filler cap 1 by rotating cap counterclockwise e Fill tank 2 to holes approximately 3 in 7 6 cm in filler neck f Install filler cap 1 by rotating cap clockwise as far as it will go 9 2320 303 10 3 7 INFLATION a Remove pneumatic hose 1 with gauge from BII storage box b Connect pneumatic hose 1 to emergency gladhand red 2 on left
48. wash your eyes and get medical aid WARNING FIRE EXTINGUISHER Discharging large quantities of dry chemical fire extinguisher in cab may result in temporary breathing difficulty during and immediately after the discharge event If at all possible discharge fire extinguisher from outside the cab Ventilate cab thoroughly prior to reentry WARNING HAZARDOUS WASTE DISPOSAL When servicing this vehicle performing maintenance or disposing of materials such as engine coolant transmission fluid lubricants battery acids or batteries and CARC paint consult your unit local hazardous waste disposal center or safety office for local regulatory guidance If further information is needed please contact The Army Environmental Hotline at 1 800 872 3845 WARNING HEARING PROTECTION e Hearing protection is required when operating vehicle at more than 45 mph 72 kph with windows open for an extended period of time Hearing protection is also required when working around truck with engine running for an extended period of time Failure to follow this warning may result in hearing damage 9 2320 303 10 Hearing protection is required when personnel are within 1 m 3 1 ft of the vehicle when operating at low engine idle 600 rpm and within 3 5 m 11 ft of the vehicle when operating at high idle 1600 rpm WARNING NBC EXPOSURE If NBC exposure is suspected all air cleaner media should be handled by personnel wearing protective equipm
49. working around batteries Do not smoke use open flame make sparks or create other ignition sources around batteries If a battery is giving off gases it can explode and cause injury to personnel Remove all jewelry such as rings ID tags watches and bracelets If jewelry or a tool contacts a battery terminal a direct short will result in instant heating damage to equipment and injury to personnel e Sulfuric acid contained in batteries can cause serious burns f battery corrosion or electrolyte makes contact with skin eyes or clothing take immediate action to stop the corrosive burning effects Failure to follow these procedures may result in death or serious injury to personnel a Eyes Flush with cold water for no less than 15 minutes and seek medical attention immediately b Skin Flush with large amounts of cold water until all acid is removed Seek medical attention as required c Internal If corrosion or electrolyte is ingested drink large amounts of water or milk Follow with milk of magnesia beaten egg or vegetable oil Seek medical attention immediately d Clothing Equipment Wash area with large amounts of cold water Neutralize acid with baking soda or household ammonia WARNING BRAKES Do not use trailer handbrake to prevent trailer from jackknifing because this may cause trailer to jackknife Modern airbrake systems are designed to deliver the right amount of air to all wheels to stop vehicle without ja
50. 11655778 3 5120 00 293 1289 Wrench Lug EA in BII storage box 03683 18806 7 9 2320 303 10 APPENDIX ADDITIONAL AUTHORIZATION LIST Section INTRODUCTION C 1 SCOPE This appendix lists additional items that you are authorized for the support of the M915A4 truck tractor C 2 GENERAL This list identifies items that do not have to accompany the truck and that do not have to be turned in with it These items are authorized to you by CTA MTOE TDA or JTA C 3 EXPLANATION OF LISTING National Stock Numbers descriptions and quantities are provided to help you identify and request the additional items you require to support this equipment If the item required differs for different models of this equipment see the Usable on Code column for the applicable model or models Usable on Codes is applicable for this manual 1 National Stock Number 6130 01 421 3768 5110 00 293 2336 5510 00 491 0306 5510 00 491 0307 2540 01 453 0497 5340 00 545 2337 5120 00 288 6574 5895 01 361 7606 6545 00 922 1200 4230 01 133 4124 5340 01 345 4676 1005 01 345 8880 5340 00 158 3805 C 2 TM 9 2320 303 10 Section ADDITIONAL AUTHORIZATION LIST 2 3 4 Description Usable Qty CAGEC amp Part Number on Code U M Auth Analyzer Charger Battery 0G1L1 S55A Axe Single Bit 4 16 HD wt 35 5 36 5 in long 19207 6150925 Block Jack Support Wood 4 8 9 in 19
51. 207 CPR103023 1 Block Jack Support Wood 7 8 9 19207 CPR103023 2 Chains Tire 80535 2245 Clevis Part of Tow Bar 2540 00 378 2012 19207 8724449 Handle Mattock 35 5 36 5 in long 19207 11677021 Installation Kit SINCGARS 80063 A3104086 Kit Air Deflector 64678 681 790 02 KO Kit Arctic Heater 62380 Thermo 90S Kit First Aid 19207 11677011 Kit M13 Apparatus 81361 E5 51 527 Kit M13 Decontamination Mounting 64678 681 899 01 KO Kit Rifle Mounting 64678 681 816 00 KO Padlock 96906 MS35647 10 9 2320 303 10 Section Il ADDITIONAL AUTHORIZATION LIST Con t 1 2 3 4 National Description Usable Qty Stock Number CAGEC amp Part Number on Code U M Auth 5120 00 243 2395 Pick Mattock 5 Ib without Handle 19207 11677022 5315 00 539 9174 Pin Part of Tow Bar 2540 00 378 2012 19207 10929861 5315 00 350 4326 Pin Locking Part of Tow Bar 2540 00 378 2012 19207 5213744 5120 00 293 3336 Shovel Hand Rd Pt D Hdl Short Size 2 19207 11655784 2540 01 267 2912 Tow Bar Medium Duty 19207 12322663 C 3 9 2320 303 10 APPENDIX D EXPENDABLE AND DURABLE ITEMS LIST Section INTRODUCTION D 1 SCOPE This appendix list expendable and durable items you will need to operate and maintain the M915 Family of Vehicles This listing is for informational purposes only and is not authority to requisition the listed items These items are autho
52. 59 Nem 400 298 3 kW 2100 rpm 1 bypass 1 primary replaceable elements 3 diesel fuel injected cylinder 1 dry element 1 10 psi 69 kPa dual 12 24 volt 4 12 volt Allison HD 4560P 4 speed automatic pushbutton Rockwell l beam FF961 12 000 Ib 5448 kg 32 9 2320 303 10 1 11 EQUIPMENT DATA Con t Rear Axle Tandem Manu fact ltet icti teer fever OV evo cel evo Rockwell SQHP Rated 38 000 Ib 17 252 kg at on 4 44 1 Interaxle Differential senes bevel gear Interaxle Differential air control Brake System ecient air mechanical Pressure 244 2 1 60 120 psi 414 827 kPa Airbrake Chambers Srl ue 2 on front axle Failsafe 4 on forward rear and rear rear axles ABS Anti Lock Brake System Types 4 channel Location front axle and rear rear axle Wheels Kjcp CE 22 5 x 825 in Number of Studs Stud 5126 10 1 125 in Tires Elm EE tubeless radial on highway skr c e 11 R22 5 Ply R tirig 1 2 te Sees Irene dope ee pee 14PR oeste ttt icto eh cott Eee a eod H Inflation Pressure Maximum Load EtOnt i acu e D REUS 105 psi 724
53. ATES Con t io a ao LN ees 77 ERE Rat zh L KORO SHIPPING DATA M9ISA4 OVER ALL LENGTH 276 00 IN SHIPPING TONNAGE 10 TONS OVER ALL HEIGHT 118 00 IN FRONT AXLE WEIGHT 9 700 LBS OVER ALL WIDTH 100 00 IN FRONT REAR AXLE WEIGHT 4 310 LBS SHIPPING VOLUME 1 047 0 CU FT BACK REAR AXLE WEIGHT 4 510 LBS e SHIPPING WEIGHT 16 320 LBS le PAu E 3 9 2320 303 10 E 3 STOWAGE AND STENCILS PERSONNEL GEAR STORAGE BOX 105 M13 DECONTAMINATION KIT MOUNTING E TP100 LIFT BASIC ISSUE ITEMS DOWN DOWN BII STORAGE BOX cn 105 100 4 9 2320 303 10 E 3 STOWAGE AND STENCILS LOAD CLASSIFICATION SIGN LIFT TAPE PERSONNEL GEAR 9 STORAGE BOX REFLECTIVE TAPE E 5 9 2320 303 10 E 3 STOWAGE AND STENCILS Con t E 6 9 2320 303 10 APPENDIX F LUBRICATION INSTRUCTIONS F 1 GENERAL NOTE These instructions are mandatory This equipment is enrolled in the Army Oil Analysis Program AOAP Engine oil and transmission oil must be sampled every 90 days as prescribed by DA Pam 738 750 a The M915A4 must receive lubrication with approved lubricants at recommended intervals in order to be mission ready at all times b The Lubrication Chart shows lubrication points items to be lubricated the required lubricants
54. Automotive Vehicles ee TM 9 8000 A 6 TECHNICAL BULLETINS Rust Proofing Procedures for Truck Utility TB 43 0213 ECIAM TEE TB 9 2320 364 15 7 OTHER PUBLICATIONS Abbreviations for Use on Drawings and in Specifications Standards and Technical MIL STD 12D Army Medical Department Expendable Durable Items CTA 8 100 Expendable Durable Items Except Medical Class V Repair Parts and Heraldic CTA 50 970 Prevention of Motor Vehicle AR 385 55 A 2 9 2320 303 10 APPENDIX B COMPONENTS OF END ITEM AND BASIC ISSUE ITEMS LISTS Section INTRODUCTION B 1 SCOPE This appendix lists Components of End Item and Basic Issue Items for the M915A4 truck tractor to help you inventory items required for safe and efficient operation B 2 GENERAL The Components of End Item and Basic Issue Items BII Lists are divided into the following sections a Section Components of End This listing is for informational purposes only and is not authority to requisition replacements These items are part of the end item but are removed and separately packaged for transportation or shipment As part of the end item these items must be with
55. B and C fire extinguisher Use on oil and electrical fires only a Remove fire extinguisher 3 from bracket 5 located between passenger seat and shift tower b Hold fire extinguisher 3 upright Point nozzle 4 toward base of fire and pull safety pin 1 c Squeeze lever 2 discharging chemical at base of fire Use a side to side motion to spread chemical After using fire extinguisher notify Unit Maintenance 2 78 9 2320 303 10 2 24 OPERATE LIGHTS NOTE If engine is not running ignition switch must be in ON position for lights to operate a Operate Beacon Warning Light 1 Turn ignition on and main light switch to STOP LIGHT 2 Move beacon light switch up to turn on beacon warning light 1 BCN LT indicator 4 should come on 3 beacon light switch down BCN LT indicator 4 should go off 4 Place ignition key in OFF position FASTEN SEAT BELT 2 79 9 2320 303 10 2 24 OPERATE LIGHTS Con t b Operate Work Lights 1 Connect work light plug into receptacle 3 on either side of cab 2 Place ignition key in ON position and main light switch in STOP LIGHT or SER DRIVE position 3 Position ignition key in OFF position and disconnect work light plug from receptacle 3 Operate Utility Lights 1 Place ignition key in ON position and main light switch in STOP LIGHT or SER DRIVE position 2 Move utility lig
56. Before Fording 1 Check bottom surface of water to ensure it is hard enough to be forded without exceeding maximum fording depth 2 Ensure that engine is operating properly 3 Lubricate unpainted surfaces to guard against rust and deterioration 4 Place interaxle lockout control valve lever in LOCK position c During Fording 1 Place transmission in a low gear paragraph 2 13 and enter water slowly 2 Ford at speeds of 3 4 mph 5 6 kph d After Fording 1 When vehicle emerges from water apply brakes a few times to dry brake linings Ensure that brakes are working properly before driving at normal speeds 2 Place interaxle lockout control valve lever in UNLOCK position 3 Allow engine to run for awhile to drive out any accumulated water 4 Drain or dry any area where water has accumulated S Check all fluids for signs of contamination and for proper levels Appendix F 6 lf vehicle has been operated in salt water rinse undercarriage immediately Allow exterior to dry and check for evidence of salt accumulation Use a clean damp cloth to immediately remove all salt accumulation 7 Notify Unit Maintenance that after fording lubrication is required 2 95 9 2320 303 10 2 37 OPERATE SANDY OR DUSTY CONDITIONS NOTE M915A4 is equipped with No Spin automatic locking positive traction differential on the forward rear axle The No Spin differential eliminates individual wheel spino
57. CK position to release two slide locking plungers 3 Ensure that plungers release c Drive tractor slowly forward or backward to position fifth wheel d After sliding to desired position engage two slide locking plungers 3 by placing fifth wheel slide control valve lever 5 LOCK position 2 72 9 2320 303 10 2 17 OPERATE SLIDING FIFTH WHEEL Con t CAUTION Do not operate vehicle if slide locking plungers are not fully engaged and landing gear is not fully retracted This could result in damage to tractor semitrailer and landing gear e Visually check that two slide locking plungers 3 are retracted and fully engaged It may be necessary to leave semitrailer brakes locked and move tractor slightly to engage plungers in rack teeth 2 f If lowered raise landing gear to fully retracted position 2 18 COUPLE SEMITRAILER WARNING Do not use semitrailer handbrake as primary brake to keep tension on coupling system This will cause undue tension on brakes and coupling which could result in injury to personnel or damage to equipment Prevent problems with slack in fifth wheel by using good braking habits and adjusting coupling and braking systems properly CAUTION If towing M872 semitrailer rear mud flaps must be removed and stowed Failure to follow this caution may result in equipment damage a Ensure that fifth wheel ramps are level with or are slightly below the angle of the pickup ramps WARNING Use c
58. D 2 4 Description CAGEC Part Number ANTIFREEZE Multi Engine Type Type 58536 A A 52624 1 Gallon Can 5 Gallon Container Cleaning Compound Windshield 81348 O C 1 901 DETERGENT General Purpose Liquid 81348 7930 00 282 9699 1 Gallon Can FUEL DIESEL DF 2 Grade 81348 VVF800GRADEDF2RE 5 Gallon Can 55 Gallon Drum 16 Gage 55 Gallon Drum 18 Gage FUEL Diesel Winter 81348 VVF800GRADEDF1W1 Bulk 5 Gallon Can 55 Gallon Drum 16 Gage 55 Gallon Drum 18 Gage GREASE Automotive and Artillery GAA 81349 MIL G 10924 14 Ounce Cartridge 2 1 4 Ounce Tube 1 3 4 Pound Can 6 1 2 Pound Can 35 Pound Pail 120 Pound Drum 9 2320 303 10 Section EXPENDABLE AND DURABLE ITEMS LIST Con t 1 Item Number 2 3 National Level Stock Number C 9150 01 035 5390 9150 01 035 5391 9150 01 035 5392 9150 01 035 5393 9150 01 035 5394 9150 01 035 5396 9150 00 402 4478 9150 00 402 2372 9150 00 491 7197 9150 00 189 6727 9150 00 186 6668 9150 00 191 2772 9150 01 151 4117 9150 01 151 4118 9150 01 151 4119 4 Description Part Number OIL Lubricating GO 75 81349 MIL L 2105 1 Quart Can 5 Gallon Can OIL Lubricating Gear Multipurpose GO 80 90 81348 MIL L 2105 1 Quart Can 5 Gallon Can 55 Gallon Drum 16 Gage OIL Lubricating GO 85 140 81349 MIL L 2105 55 Gallon Drum OIL Lubricating Internal Combustion Engine Arctic OEA
59. Door Window Glass Regulator Handle Door Lock Button Push button and raise lever to unlock window Push out on handle to open window Pull handle in to close window Lower lever to lock window Pul cable to activate air horn Release cable to deactivate air horn Pull handle to open cab door Turn left handle clockwise to lower left window and counterclockwise to raise left window Turn right handle counterclockwise to lower right window and clockwise to raise right window Push button down to lock door To unlock either pull door opening handle or unlock from outside with ignition key 9 2320 303 10 2 6 ADDITIONAL CONTROLS AND INDICATORS Con t Control or Indicator Stroke Alert Indicator Bright orange band painted on service pushrod of all brake chambers When visible notify Unit Maintenance to perform stroke adjustment or major brake service 9 2320 303 10 2 6 ADDITIONAL CONTROLS AND INDICATORS Con t Control or Indicator Hood Prop When installed prevents hood from accidentally closing 2 19 9 2320 303 10 2 6 ADDITIONAL CONTROLS AND INDICATORS Con t 8 Key Control or Indicator Interior Light Provides interior cab lighting 2 20 2 6 9 2320 303 10 ADDITIONAL CONTROLS AND INDICATORS Con t g CWS Driver s Display Unit Green Power On Volume Control and Power On Off Speaker llluminates after power is applied to the system a
60. EVIATIONS NOTE Refer to MIL STD 12D for standard abbreviations Abbreviation Definition MICA uL a mM Mer Additional Authorization List MT Anti Lock Brake System l H Basic Issue Items G eine P Centigrade or Celsius e Cubic Inch Displacement ume MS Centimeter golpe Kn Components of End Item MIS ense ee Euer ee epe eos Ere eu peu p e ute Collision Warning System Electronic Control Unit uua testen dub i ocu do Door TRA ME Fahrenheit GOWR mE Gross Combination Weight Rating aV Eb hee Gross Vehicle Weight Rating nc Kilogram orsi guo en deep ed rau ue eva eU re Kilometer prie p E UD E ODE tes Pare Pop Toe Kilopascal tee ae cu tesa t epu Eee ef tenu ut ecd n en Kilometers per Hour KW eR teet e ue MR Kilowatt xt dc M LM t E Liter lr Pound lo ge Pound foot o mc Liters per Hour LEE Meter PEE Ur Millimeter cst t bt en kerk ch e su kcal re dst os Vr Newton meter PMGS Preventive Maintenance Checks and Services DSU ci PEPEE A E
61. OEA lubricant is EE en i ene pees eee REN emery to meet the low expected temperature range lubricant is to be used in lieu of OE HDO 10 lubricant for all expected temperatures where OE HDO 10 is EE en i iie Mama CHART B TRANSMISSION EXPECTED TEMPERATURES Teese ee OE HDO Lubricating Oil ICE L 2104 Oil ICE Len 46167 fag 0 1236 10 0 i S If OEA lubricant Is RN arret es EMO MEE to meet the low expected temperature range OEA lubricant is to be used in lieu of OE HDO 15 40 lubricant for all RU erie RN temperatures where OE HDO 10 and OE HDO 15 40 are specified 9 2320 303 10 CHART AXLE WHEEL BEARINGS EXPECTED TEMPERATURES FEEFPEEFEEEEEFEFEEETE wo siepe GO Lubricating Gear MIL L 2105 Multipurpose 0 186 0 226 ar 0728 9 2320 303 10 FUEL FILTER WATER SEPARATOR 0 PRIMARY FUEL FILTER WHEEL BEARINGS VIEW B FRONT AXLE WHEEL BEARINGS tc lt A o z 1 Lu T gt gt 7 F 8 TM 9 2320 303 10 VIEW C POWER STEERING RESERVOIR FILL AND LEVEL CHECK POWER STEERING RESERVOIR Engine Fill 9 2320 303 10 VIEW E TRANSMISSION Transmission Check and Fill VIEW F FIFTH WHEEL SLIDE PATH amp RACK F 9 9 2320 303 10
62. OR 1 19 BRAKES a The dual air brake system consists of two independent air brake systems that use a single set of brake controls Each system has its own reservoirs plumbing and brake chambers The primary system operates the service brakes on the rear axle the secondary system operates the service brakes on the front axle On tractor trailer configurations service brake signals from both systems are sent to the trailer b Loss of air pressure in the primary system causes the rear service brakes to become inoperative front brakes will continue to be operated by secondary system air pressure In addition trailer brakes will be operated by the secondary system Loss of secondary system air pressure causes the front axle brakes to become inoperative rear service brakes and trailer brakes will be operated by the primary system 9 2320 303 10 1 19 BRAKES Con t The warning light and buzzer inside the cab come on if ar pressure drops below 64 psi 441 kPa in either system If this happens check the air pressure gages to determine which system has low air pressure Although the vehicle s speed can be reduced using the foot brake control pedal either the front or rear service brakes will not be operating causing a longer stopping distance Bring the vehicle to a safe stop and have the air system repaired before continuing d If the primary system become inoperative the spring parking brakes will automatically apply when ai
63. OTING SYMPTOM INDEX Con t Troubleshooting Procedure Page WHEELS AND TIRES Tires Worn Unevenly or 3 11 Vehicle Wanders or Pulls to One Side on Level Pavement 3 12 Wheel E nae 3 12 3 5 9 2320 303 10 Table 3 1 Troubleshooting MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION AIR SYSTEM AND BRAKES 1 AIR RESERVOIR PRESSURE LOW WARNING LIGHT AND BUZZER ARE ON Step 1 Check whether air reservoir draincocks are closed Close draincocks Step 2 If vehicle is not coupled to a semitrailer check position of trailer air supply control knob Pull knob out OFF Step 3 Start engine paragraph 2 12 and check for air leaks at air reservoirs hoses fittings and intervehicular air hose connections If air leaks are present notify Unit Maintenance Step 4 Perform semitrailer troubleshooting 2 AIR SYSTEM LOSES PRESSURE DURING VEHICLE OPERATION OR LOW AIR PRESSURE WARNING LIGHT AND BUZZER COME ON DURING VEHICLE OPERATION NOTE Any change in pressure on brake pedal will cause a change in air pressure reading Step 1 Ensure trailer air supply control knob is pulled out OFF Operate engine until warning light and buzzer go off and release parking brake Stop engine and note reservoir pressure Fully press and hold service brake pedal for two minutes Have crewmember check for leaks Reservoir pressure loss dur
64. RTER BUTTON IS PRESSED Step 1 Check position of ignition switch Place ignition switch in ON position Step 2 Check selection of transmission shift selector pushbuttons Select transmission shift selector Neutral N pushbutton 3 9 9 2320 303 10 Table 3 1 Troubleshooting Con t MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION Step 3 Check for dirty loose or broken battery cables Clean dirty cables Tighten loose connections at batteries ground and starter If cable is broken notify Unit Maintenance 12 ENGINE STARTS BUT MISFIRES OR RUNS ROUGH AFTER PROPER WARMUP PERIOD Check air cleaner restriction indicator If indicator is not clear notify Unit Maintenance 13 EXCESSIVE ENGINE OIL CONSUMPTION Check for loose oil lines and oil leaks If oil lines are loose or leaks are found notify Unit Maintenance 14 EXCESSIVE EXHAUST SMOKE AT NORMAL ENGINE OPERATING SPEED Step 1 Check air cleaner restriction indicator If indicator is not clear notify Unit Maintenance Step 2 Check for water in fuel Drain fuel filters Table 2 1 15 LOW OR NO ENGINE OIL PRESSURE Check engine oil level If engine oil is low fill to correct level Appendix F STEERING 16 HARD STEERING SHIMMY OR WANDERING NOTE Check tire pressure when tires are cold Step 1 Check that tires are properly inflated Inflate tires to proper pressure Table 2 1 Step 2 Check for loose lug nuts Tighten loose lug nuts and noti
65. SAC 9 2320 303 10 RECOMMENDED CHANGES TO PUBLICATIONS Use Part reverse for Repsir Parts and Special Lists RPSTLI and Supply BLANK FORMS for ute Of term qae AR 2650 ma poparen agency OSCE Cetelogs Supply Manuals 5 5 TO Forward to proponent of publication or form lockude ZIP Cade FROM Activity and locations include ZIP Code AMSTA LC CI TECH PUBS TACOM RI 1 Rock Island Arsenal Rock Island IL 61299 7630 PART ALL PUBLICATIONS EXCEPT RPSTL AND 5 5 AND BLANK FORMS PUBLICATION FORM NUMBER DATE mme Truck Tractor Line Haul Operator s TM 9 2320 303 10 15 Oct 2001 Manual Sa ce cc TYPED NAME GRADE OR TITLE TELEPHONE EXCHANGE AUTOVON PLUS EXTENSION DA 2028 REPLACES DA FORM 2028 1 OEC 68 WHICH WILL USED USAPPC vi 00 9 2320 303 10 THE METRIC SYSTEM AND EQUIVALENTS Linear Measure Square Measure 1 Centimeter 10 Millimeter 0 01 Meters 03937 Inches 1 Sq Centimeter 100 5 Millimeters 0 155 Sq Inches 1 Meter 100 Centimeters 1000 Millimeters 39 37 1 Sq Meter 10 000 Sq Centimeters 10 76 Sq Feet Inches 1 Sq Kilometer 1 000 000 Sq Meters 0 0386 Sq Miles 1 Kilometer 1000 Meters 0 621 Miles Cubic Measure Weights 1 Cu Centimeter 1 000 Cu Millimeters 0 06 Cu Inches 1 Gram 0 001 Kilograms 1000 Milligrams 0 035 1 Cu Meter 1 000 000 Cu Centimeters 235 31 Cu Feet Ounces 1 Kilogram 1000
66. ain When fully drained close drain valve 2 47 9 2320 303 10 Table 2 1 Preventive Maintenance Checks Services PMCS for M915A4 Con t Item To Check Not Fully Mission Interval Service Procedure Capable If 39 After Engine NOTE Crank case To ensure an accurate reading vehicle must be parked on level ground Wait 10 minutes after shutting down engine to allow oil to drain into crankcase Remove dipstick 50 and check level of lubricating Safe operating level is between ADD and FULL marks on dipstick If level is low add oil through filler opening 51 until level on dipstick is correct d 51 50 2 48 Interval 40 41 42 43 After After After After TM 9 2320 303 10 Table 2 1 Preventive Maintenance Checks and Services PMCS for M915A4 Con t Item To Check Not Fully Mission Service Procedure Capable If Radiator WARNING DO NOT remove radiator cap unless engine is cold Remove cap in two steps First place thick cloth over cap and slowly turn cap left to first stop Pause and allow pressure to escape Turn cap further left until it can be removed This is a pressurized cooling system and escaping steam hot water or coolant will cause serious burns Remove radiator cap 52 and check coolant level in radiator 53 Coolant must be within 2 1 2 in 6 4 cm below filler neck Add coolant as required Appendix
67. al condition of electrical connector is Air intervehicular air hoses damaged Hoses 30 gladhands 31 and and 33 gladhand preformed Electrical packings 32 and three Connec electrical connectors tors 28 After Fifth Check fifth wheel lube a One or both lube plates Wheel plates 36 for severe are loose missing chips wear cracks damaged gouges or bends Check if 25 or more of lube plate coating is missing from one or both plates due to normal wear or damage Check for operation b Lock release levers do and damage to lock not operate Locking jaw release levers 39 mechanism is cracked or slide locking plungers worn 38 sliding rails 37 and fifth wheel plate 35 2 40 9 2320 303 10 Table 2 1 Preventive Maintenance Checks Services PMCS for M915A4 Con t Item To Check Not Fully Mission Service Procedure Capable If Overall a Check under truck for a Class Ill oil coolant or View evidence of fluid hydraulic leaks or Class 11 leakage such as oil fuel leaks are evident coolant fuel or hydraulic fluid Check rear gladhands for damage Ensure that gladhand vent holes are not plugged Ensure that dummy couplings are installed Check truck for c Damage that would impair obvious damage that operation is evident would impair operations 2 41 m Interval After 9 30 31 32 33 34 2 42 After After After
68. aluminum 2 passenger tilt forward hood 2 fixed top rear of cab 1 under cab 8 14 35 unloaded loaded 14 46 unloaded loaded 11 34 unloaded loaded 9 2320 303 10 Section PRINCIPLES OF OPERATION Paragraph Page Number Paragraph Title Number ecc rc al Es T2 C T Exha st SyStelmi Exeter not Cooling System cesses secte dienen Flecirical Systemi E E D Dn E LOSING Air Conditioning Collision Warning System 5 1 12 INTRODUCTION The 915 4 vehicles consist of nine functional systems drive train fuel system exhaust system cooling system electrical system air system brakes steering air conditioning and collision warning system b This section explains the overall operation of these systems 1 13 DRIVE TRAIN The drive train of the M915A4 consists of a Cummins NTC 400 engine and an Allison 4 speed automatic transmission connected to Rockwell SQHP rear tandem axles REAR REAR AXLE FORWARD REAR AXLE TRANSMISSION ENGINE 9 2320 303 10 1 14 FUEL SYSTEM a Fuel to power the engine is pumped out of the fuel tank by an engine mounted f
69. aments Command ATTN AMSTA DSA CS Warren MI 48397 5000 WARNING WORK SAFETY Use caution when lifting or handling wheel and tire assembly It is heavy and could cause injury if improperly lifted or if it falls on you Hydraulic jack is intended only for lifting truck not for supporting vehicle to perform maintenance Do not get under truck after it is raised unless it is properly supported with blocks or jackstands Failure to observe this warning may result in death or injury to personnel Ether is highly flammable and explosive DO NOT perform ether quick start system checks or inspections while smoking or near fire flame or sparks Failure to follow this warning may cause a fire and explosion causing serious injury or death to personnel Failure to completely turn ON or OFF air cutoff valve will cause loss of brakes on trailer or truck Lifting cables chains hooks and slings used for lifting truck must be in good condition and of suitable capacity Failure to follow this warning may result in injury or death to personnel and damage to equipment Improper use of lifting equipment and improper attachment of cables to vehicle can result in serious personnel injury and equipment damage Observe all standard rules of safety ALWAYS install hood prop after opening hood Failure to follow this warning could result in severe injury to personnel WARNING TOWING Brakes will be released when air is applied to a disabled vehi
70. and insert lock pin 1 d When towing operations am complete remove lock pin 1 and mud flap 2 from stowage bracket 3 2 22 e Position mud flap 2 on vehicle and install lock pin 1 OPERATE AIR CONDITIONER If cab is hot inside open windows and allow hot air to vent b Move mode control lever 2 to VENT and turn fan switch 1 to OFF position c Start engine paragraph 2 12 NOTE If outside air is dusty or smoky mode control lever should be set to MAX A C and windows and vent closed to prevent drawing dust or smoke into cab d Move mode control lever 2 to A C With control at A C fresh air is drawn into cab With control at MAX A C air inside cab is recirculated 2 77 2 22 2 23 TM 9 2320 303 10 OPERATOR AIR CONDITIONER Con t e Move temperature control lever 3 to COOL Des OFF 4 MAXAIC VENT HEAT HEAT DEF D 4 f Turn fan switch 1 to 4 highest speed g soon cool air is flowing from dashboard outlets clos e windows h Adjust temperature control lever 3 and fan switch 1 as required OPERATE PORTABLE FIRE EXTINGUISHER WARNING Discharging large quantities of dry chemical fire extinguisher in the cab may result in temporary breathing difficulty during and immediately after the discharge event If at all possible discharge fire extinguisher from outside the cab Ventilate cab thoroughly prior to reentry NOTE This is a type
71. aph 2 2 0 Select transmission gear paragraph 2 13 h Move truck gradually by depressing accelerator CAUTION During long engine idling periods engine coolant temperature will fall below normal operating range The incomplete combustion of fuel in a cold engine will cause crankcase dilution formation of lacquer or gummy deposits on valves pistons and rings and rapid accumulation of engine sludge i Avoid unnecessary engine idling NOTE e If during operation Low Air Pressure warning light comes on stop vehicle shut down engine and investigate cause e If tractor or trailer ABS light comes on while driving vehicle braking system is still operational Continue to operate vehicle in a safe manner Notify unit maintenance when mission is complete j Check gages and indicators frequently k Operate engine brakes as required paragraph 2 2 9 2320 303 10 2 15 DRIVING Con t l Operate interaxle lockout as required paragraph 2 14 m Stop vehicle by applying long even pressure to service brakes Do not pump brakes n After vehicle is at a complete stop place transmission in Neutral pull parking brake control knob OUT Ensure parking brake light comes on WARNING If vehicle is left with engine running vehicle can move suddenly causing serious injury or death to personnel or damage to equipment If you must leave vehicle with engine running DO NOT leave vehicle without doing the fo
72. apors DO NOT use near open flame or excessive heat The solvent s flash point is 100 F 130F 38 C 59 C If you become dizzy while using cleaning solvent immediately get fresh air and medical help If solvent contacts eyes immediately wash your eyes and get medical aid 2 26 9 2320 303 10 2 9 GENERAL PMCS PROCEDURES Con t 1 Keep It Clean Dirt grease oil and debris get in the way and may cover up a serious problem Clean as you work and as needed Use dry cleaning solvent tem 16 on all metal surfaces Use detergent Item 3 Appendix D and water when you clean rubber plastic and painted surfaces 2 Rust and Corrosion Check metal parts for rust and corrosion If any bare metal or corrosion exists clean and apply a light coat of lubricating oil Item 13 Appendix D Report it to your supervisor 3 Bolts Nuts and Screws Check bolts nuts and screws for obvious looseness missing bent or broken condition You can t try them all with a tool but look for chipped paint bare metal or rust around bolt heads If you find one you think is loose tighten it 4 Welds Look for loose or chipped paint rust or gaps where parts are welded together If you find a bad weld report it to your supervisor 5 Electric Wires and Connectors Look for cracked or broken insulation bare wires and loose or broken connectors Tighten loose connectors and ensure that the wires are in good condition 6 Hoses and Fl
73. at adjustment lever 28 Check for proper operation of lumbar adjustment knob 19 seat back adjustment lever 20 and seat tilt knob 22 10 Before Steering Adjust tilt and_height_of Steering wheel does not lock Wheel steering wheel into adjusted position 2 3 11 Before Side Adjust side mirrors as Mirrors required 2 11 2 33 12 13 2 34 Interval Before Before TM 9 2320 303 10 Table 2 1 Preventive Maintenance Checks and Services PMCS for M915A4 Con t Item To Check Service Instru ment Panel Gages and Indicator and Warning Lights Parking Brake Procedure a Check oil pressure gage Reading should be 15 50 psi 100 295 kPa at idle b Check primary secondary air pressure gages for 90 120 psi 621 827 kPa green Check that voltmeter registers within green band d Check that fuel supply gage registers indicates adequate fuel for mission e Check air cleaner restriction indicator With service brake pedal depressed transmission in Drive D and engine at idle pull out on parking brake valve then release service brake pedal Vehicle should not move Not Fully Mission Capable If At 1700 2100 rpm minimum engine oil pressure for safe operation is 15 psi 100 kPa If gage does not show at least 15 psi 100 kPa shut down engine and notify supervisor Failure to follow this caution will damage engine
74. ation 1 Depress brake pedal and hold 2 Release parking brake paragraph 2 2 3 Press transmission shift selector pushbutton to desired range 4 Release brake pedal and begin to move vehicle 2 66 9 2320 303 10 2 13 TRANSMISSION Con t 5 As required select a specific forward gear using up or down arrow pushbuttons 2 14 DRIVING TIPS WARNING BE ALERT for personnel in area while operating truck Always check to ensure area is clear of personnel and obstructions before moving out Failure to follow this warning may result in serious injury or death to personnel CAUTION Governed speed is 2100 rpm If engine is allowed to exceed governed speed serious engine or transmission damage may result a Check gages and indicators frequently If gage or indicator shows an abnormal reading or warning light comes on bring vehicle to a safe stop shut down engine 2 16 and investigate cause CAUTION Steering wheel should not be held at full steer for more than 10 seconds This could result in overheating of oil loss of oil from power steering reservoir and pump gear damage b Avoid over steering Become familiar with steering characteristics of vehicle before attempting maneuvers in limited space 2 67 9 2320 303 10 2 14 DRIVING TIPS Con t Drive efficiently and economically 1 Driving at Highway Speed Recommended normal highway cruising range is 1800 1900
75. aution when coupling to semitrailer BE ALERT for personnel in area Ensure that hands arms and body are clear of potential pinch points Failure to follow this warning may result in injury to personnel 2 73 9 2320 303 10 2 18 COUPLE SEMITRAILER Con t CAUTION Be careful not to run kingpin up fifth wheel ramps as this can damage kingpin and or fifth wheel NOTE e Truck and semitrailer must be aligned Use a ground guide if one is available PROPER ALIGNMENT WITH SEMITRAILER CAUTION Fifth wheel lube plates and trailer kingpin plate must be clean and dry prior to coupling Failure to follow this caution could damage fifth wheel and or trailer b Slowly back tractor under semitrailer kingpin plate Stop when kingpin plate is touching guide ramps Semitrailer kingpin should be centered as closely as possible in throat of fifth wheel c Ensure that semitrailer is picked up with fifth wheel ramps f kingpin comes in too high it will not engage in fifth wheel correctly Adjust semitrailer if needed NOTE One 12 volt light cable and one 24 volt light cable are stored in tool box d Connect air hoses and light cables Push semitrailer air supply control knob IN paragraph 2 2 open semitrailer supply valve and set semitrailer control valve hand brake e If semitrailer is ABS equipped connect ABS electrical cable CAUTION Backing SLOWLY helps to prevent hitting too hard in coupling and damaging ki
76. axle lockout as required CAUTION DO NOT actuate interaxle lockout control valve while tires are spinning DO NOT operate vehicle continuously with interaxle lockout control valve locked during extended good road conditions Damage to axle gearing and excessive tire wear could result 1 To lock interaxle ease up on accelerator pedal momentarily and move interaxle lockout control valve lever to LOCK position while maintaining vehicle speed Proceed over poor road conditions with caution 2 unlock interaxle place interaxle lockout control valve lever in UNLOCK position and remove foot from accelerator 2 15 DRIVING a Perform initial adjustments daily checks and self tests paragraph 2 11 b Start engine paragraph 2 12 and allow truck to warm up 2 69 2 15 2 70 9 2320 303 10 DRIVING Con t WARNING Serious injury may result if head clearance is not adequate while sitting in seat Before driving or riding in vehicle ensure there is adequate clearance at maximum upward travel of seat c Adjust seat paragraph 2 5 d Adjust seat belt paragraph 2 11 WARNING Ensure that control lever is in locked neutral position before driving truck NEVER try to adjust tilt or height of steering wheel while driving Failure to follow this warning may cause death or injury to personnel e Use tilt steering wheel control lever to adjust till and steering wheel height D f Turn on lights as necessary paragr
77. ble for this manual d Column 4 Unit of Issue Indicates how the item is issued for the National Stock Number shown in Column 2 e Column 5 Quantify Required Qty Rqd Indicates the quantity of the item authorized to be used with the equipment Section Il COMPONENTS OF END ITEM There are currently no COEI assigned 9 2320 303 10 Section BASIC ISSUE ITEMS 1 2 3 4 5 6 Illus National Description Usable Number Stock Number CAGEC Part Number on Code U I EA 2540 00 670 2459 Bag Pamphlet In cab glove box 19207 11676920 5140 00 356 8471 Bag Tool in BII storage box 19204 7541507 6220 01 218 4968 Beacon Warning Light Kit 12 volt 10402 01 0683146LAPA 7510 00 889 3494 Binder Looseleaf 19207 11677003 6150 01 022 6004 Cable Assy Power NATO in BII storage box 19207 11682336 1 B 3 1 Illus Number Section Ill BASIC ISSUE ITEMS Con t 2 3 4 TM 9 2320 303 10 5 6 National Description Usable Qty Stock Number CAGEC Part Number on Code EA Cable Assy 12 volt Tractor Tri 12 ft in BII storage box 64678 06 26246 144 2540 00 678 3469 Chock Wheel in BII storage box 58536 52475 1 4210 01 338 6064 Extinguisher Fire on cab floor b4905 447 4910 01 003 9599 Gauge Tire in cab glove box 19207 7974576 1 5120 00 902 0092 Hammer 2 Ib in BII storage box 58536
78. bris Remove anything that blocks or impedes cooling fins Step 4 Check cooling fan drive belts for looseness If belts are loose notify Unit Maintenance Step 5 Check engine oil level If engine oil is low fill to correct level Appendix 9 2320 303 10 Table 3 1 Troubleshooting Con t MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION Step 6 Check transmission fluid level If transmission fluid level is low fill to correct level Appendix F 8 ENGINE CRANKS BUT FAILS TO START WARNING Fuel tank cap may become hot during vehicle operation Use hand protection when removing fuel cap Step 1 Check fuel gage with ignition switch in ON position If empty add fuel paragraph 3 6 Step 2 Check air cleaner restriction indicator If indicator is not clear notify Unit Maintenance Step 3 If operating in temperature below 32 F 0 C check that cold weather starting procedure was used Perform cold weather starting procedure paragraph 2 12 9 ENGINE DOES NOT DEVELOP FULL POWER Check air cleaner restriction indicator If indicator is not clear notify Unit Maintenance 10 ENGINE DOES NOT IDLE PROPERLY Step 1 Check air cleaner restriction indicator If indicator is not clear notify Unit Maintenance Step 2 If operating in temperature below 32 F 0 C check that cold weather starting procedure was used Perform cold weather starting procedure paragraph 2 12 11 ENGINE FAILS TO CRANK WHEN STA
79. bstructions before moving out Failure to follow this warning may result in serious injury or death to personnel Use of seat belts while operating vehicle is mandatory Fasten belt BEFORE driving Trying to fasten three point belt while driving creates a hazardous condition Failure to follow this warning may result in death or injury to personnel e Serious injury may result if head clearance is not adequate while sifting in seat Before driving or riding in vehicle ensure there is adequate clearance at maximum upward travel of seat e Ensure that tilt steering wheel control lever is in locked neutral position before driving truck NEVER try to adjust tilt or height of steering wheel while driving Failure to follow this warning may cause death or injury to personnel Use caution when coupling to or uncoupling from semitrailer Be alert for personnel in area Ensure that hands arms and body are clear of potential pinch points Failure to follow this warning may result in injury to personnel 9 2320 303 10 Operating truck with an underinflated or defective tire may lead to tire failure and loss of steering control Damage to equipment or injury to personnel may result These vehicles have been designed to operate safely and efficiently within the limits specified in this TM Operation beyond these limits is prohibited in accordance with AR 70 1 without written approval from Commander U S Army Tank automotive and Arm
80. caps on fuel tanks before adding fuel Under extremely sandy or dusty conditions filter fuel when filling tanks 6 Cover window glass to protect against sand blasting 7 Notify Unit Maintenance to clean inspect and lubricate propeller shafts more frequently 2 96 9 2320 303 10 2 38 OPERATE IN WOODS ROCKY TERRAIN NOTE M915A4 is equipped with No Spin automatic locking positive traction differential on the forward rear axle No Spin differential eliminates individual wheel spinout for better traction e When locking system is engaged driving axles receive equal torque a Ensure vehicle can clear any obstructions and try to avoid low hanging tree limbs which might cause damage b Ensure spare wheel and tire assembly is available 2 39 OPERATE ON SNOW OR ICE NOTE M915A4 is equipped with No Spin automatic locking positive traction differential on the forward rear axle The No Spin amp differential eliminates individual wheel spinout for better traction When locking system is engaged driving axles receive equal torque a General 1 Driving a Accelerate slowly to avoid spinning tires b Drive at slower speeds c Give signals sooner d Apply brakes sooner to give early warning of intention to stop This will also help to avoid skidding e Maintain double the normal distance from the vehicle ahead f Keep windshields windows mirrors headlights stoplights a
81. cation of all decals data plates and stencils 2 DECALS AND PLATES WARRANTY STARTS AS OF EXPIRES AS 9 2320 303 10 2 DECALS AND PLATES Con t e COMPONENT DATA M91I5A4 MANUFACTURED BY FREIGHTLINER CORP NOTE USE VEHICLE IDENTIFICATION CONTRACT 7 98 0 5001 NUMBER WHEN ORDERING PARTS VEHICLE MODEL NUMBER M915A4 WHEELBASE 152 00 INCHES ENGINE MODEL CUMMINS 400 BIG CAM ENGINE NO NSN2815010843447 TRANS MODEL MAIN ALLISON AUTOMATIC HO 4560P TRANS NO 507 16495 021 AXLE MODEL MERITOR FF943 12K AXLE NO 10 12919 000 REAR AXLE MOCEL MERITOR SOHP FWD RR AXLE NSN262001 1623760 GYWR 52 000 LBS RR RR AXLE NSN25200 1623761 RATIO 4 44 TO VEHICLE NOISE EMISSIOM CONTROL IMFORMATION THIS VEHICLE IS EX MPT FROM THE PROHIBITIONS SECTION 10 AMCH 2 Gh AMD 51 THE NOISE CONTROL ACT OF 1972 EN oed LUBRICATION DATA M9I5A4 16 000 16 000 oF o e t t OEACO LUBRICATING OIL INTERNA COMBUSTION TACTICAL SERVICE 4MD L 2104 G GRADE GREASE AUTOMOTIVE AMD ARTILLERY MIL 0 1C9Q4 LUBRICATING OIL GEAR 4 2103 ITDt APPEARS BOTH EIDES OF TRUX CONDITION SEE OPERATORS MAMUAL FOR CETATL TIRE AND RIM DATA o me uw E Pee ome aaron 9 2320 303 10 2 DECALS AND PL
82. chnical instructions include metric units in addition to standard units metric conversion chart is provided on the inside back cover An alphabetical index is provided at the end of the manual to assist in locating information not readily found in the table of contents FOLLOW THESE GUIDELINES WHEN YOU USE THIS MANUAL Read through this manual and become familiar with its contents before attempting to operate or maintain the truck A warning summary is provided at the beginning of this manual and should be read before attempting to operate or maintain the truck 9 2320 303 10 CHAPTER 1 INTRODUCTION Section GENERAL INFORMATION Paragraph Page Number Paragraph Title Number SCOPE MU Maintenance Forms and Procedures Corrosion Prevention and Control Destruction of Army Materiel to Prevent Enemy Use Reporting Equipment Improvement Recommendations EIRs Warranty Nomenclature Cross Reference List of 1 1 SCOPE a Type of Manual This manual is for use in operating and maintaining the M915A4 truck tractor b Equipment Name and Model Number Truck Tractor Line Haul 52 000 GVWR 6 X 4 M915A4 c Purpose of Equipment M915A4
83. ckknifing Failure to follow this warning may result in death or injury to personnel or damage to equipment Do not use trailer handbrake as primary brake to keep tension on coupling system This will cause undue tension on brakes and coupling which could result in injury to personnel or damage to equipment Prevent problems with slack in fifth wheel by using good braking habits and adjusting coupling and braking systems properly 9 2320 303 10 When caging brakes block wheels to keep truck from moving when brakes are released Failure to follow this warning may result in death or injury to personnel or damage to equipment DO NOT use engine brake if road surfaces are slippery Use of engine brake on wet icy or snow covered roads could result in loss of vehicle control Failure to follow this warning could result in death or injury to personnel or damage to equipment Brake chamber contains spring under great pressure To prevent personnel injury never work directly behind chamber If caging bolt will not engage properly spring may be broken Do not remove clamp ring around spring brake chamber It is under tension and can cause personnel injury if released When spring brakes are applied vehicle will stop quickly which could result in injury to personnel Also vehicle cannot be driven again until malfunction is repaired and enough air supply is present for operation of service brakes WARNING COMPRESSED AIR
84. ckout control valve lever is in UNLOCKED position b Towing Procedures WARNING Brakes will be released when air is applied to a disabled vehicle DO NOT connect air lines to a disabled vehicle without blocking wheels and connecting tow bar between vehicles Failure to follow this warning could result in death or injury to personnel and damage to equipment NOTE Towing vehicle speed should not exceed 15 mph on primary roads and 8 mph on secondary roads For cross country towing all tires of disabled truck should be on ground 1 Install medium duty tow bar at towing vehicle pintle and disabled truck towing eyes Ensure tow bar is long enough to allow complete turning radius 2 air pressure hoses between disabled truck and towing vehicle 3 Release parking brakes and turn appropriate lights on 2 32 AND UNCAGE BRAKES a Cage Brakes n the event of an air pressure loss spring brakes on the tandem rear axles will apply the brakes If the vehicle must be towed and there is not enough air system pressure to compress the power spring in the spring brake chambers to release the brakes compress them manually Each vehicle has four spring brakes WARNING Brake chamber contains spring under great pressure To prevent personnel injury never work directly behind chamber If caging bolt will not engage properly spring may be broken Do not remove clamp ring around spring brake chamber It is under ten
85. ckstands Failure to observe this warning may result in death or injury to personnel 5 Raise jack until tire s clears ground WARNING Use caution when lifting or handling wheel and tire assembly It is heavy and could cause injury if improperly lifted or if it falls on you 6 For front or outer rear tire remove wheel nuts and wheel and tire assembly 7 f replacing inner rear tire remove wheel nuts and wheel and tire assembly c Install Wheel and Tire Assembly 1 Inflate spare tire to proper pressure paragraph 3 7 3 19 9 2320 303 10 3 9 WHEEL AND TIRE ASSEMBLY REPLACEMENT Con t WARNING Use caution when lifting or handling wheel and tire assembly It is heavy and could cause injury if improperly lifted or if it falls on you NOTE Wheel nuts on left side of vehicle are left hand threads turn right to loosen turn left to tighten Wheel nuts on right side of vehicle are right hand threads turn left to loosen turn right to tighten e Valve stems on inner and outer rear tires should be positioned 180 apart 2 If replacing inner rear tire position wheel and tire assembly on wheel hub and install and handtighten wheel nuts 3 For front or outer rear tire position wheel and tire assembly on wheel hub and install and handtighten wheel nuts 4 Lower and remove jack WARNING Whenever inner and or outer wheel lug nuts require tightening or a wheel has been removed and replaced lug
86. cle DO NOT connect air lines to a disabled vehicle without blocking wheels 9 2320 303 10 and connecting tow bar between vehicles Failure to follow this warning could result in death or injury to personnel and damage to equipment WARNING SINCGARS RADIO DO NOT make contact with any bare metal wire surface of active SINCGARS antenna elements Failure to follow this warning could result in radio frequency RF shock or burn 9 2320 303 10 TECHNICAL MANUAL HEADQUARTERS TM 9 2320 303 10 DEPARTMENT OF THE ARMY WASHINGTON D C 15 OCTOBER 2001 OPERATOR S MANUAL FOR TRUCK TRACTOR LINE HAUL 52 000 GVWR 6 X 4 M915A4 NSN 2520 01 458 1207 REPORTING ERRORS AND RECOMMENDING IMPROVEMENTS You can help improve this publication If you find any mistakes or if you know of a way to improve the procedures please let us know Submit your DA Form 2028 Recommended Changes to Equipment Technical Publications through the Internet on the Army Electronic Product Support AEPS website The Internet address is http aeps ria armv mil If you need a password scroll down and click on ACCESS REQUEST FORM The DA Form 2028 is located in the ONLINE FORMS PROCESSINGi section of the AEPS Fill out the form and click on SUBMIT Using this form on the AEPS will enable us to respond quicker to your comments and better manage the DA Form 2028 program You may also mail fax or e mail your letter DA Form 2028 direct to AMSTA LC CI TECH PUBS
87. cotter pin Lubricate at all four grease fittings 63 Append E if hook does not rotate freely by hand 2 56 9 2320 303 10 Table 2 1 Preventive Maintenance Checks Services PMCS for M915A4 Con t Item To Check Not Fully Mission Interval Service Procedure Capable If 56 Weekly Rear WARNING Rear and Forward Operating truck with an _ underinflated Rear defective tire may lead to tire failure and loss of Wheels steering control Damage to equipment or and Tires injury to personnel may result a Check pressure in tires and adjust as required Empty 80 psi 552 kPa Loaded 100 psi 690 kPa b Ensure all wheel stud b Two or more wheel studs lug nuts are tight are missing or lug nuts are using wheel stud lug loose nut wrench and handle Check wheel for c Wheel is cracked broken cracks breaks or bent bends 57 Weekly Front WARNING Wheel and Tire Operating truck with an underinflated defective tire may lead to tire failure and loss of steering control Damage to equipment or injury to personnel may result a Check pressure in tires and adjust as required 85 psi 586 kPa Loaded 105 psi 724 kPa b Ensure all wheel stud b Two or more wheel studs lug nuts are tight are missing or lug nuts are using wheel stud lug loose nut wrench and handle c Check wheel for c Wheel is cracked broken cracks breaks or bent
88. d explosive DO Start NOT perform ether quick start system checks System or inspections while smoking or near fire flame or sparks Failure to follow this warning may cause a fire and explosion causing serious injury or death to personnel Check for loose Damage leakage is connections and damage evident to lines fittings canister Be alert for the odor of leaking ether 46 Weekly Wind Check level of fluid in shield reservoir located in Washer engine compartment Reser below driver windshield voir on left firewall Add windshield cleaning compound Item 2 as required 47 Weekly Front WARNING Wheel Operating truck with an underinflated and Tires defective tire may lead to tire failure and loss of steering control Damage to equipment or injury to personnel may result a Check pressure in tires and adjust as required Empty 85 psi 586 kPa Loaded 105 psi 724 kPa b Ensure all wheel stud b Two or more wheel studs lug nuts are tight are missing or lug nuts are using wheel stud lug loose nut wrench and handle Check wheel for c Wheel is cracked broken cracks breaks or or bent bends 2 51 9 2320 303 10 Table 2 1 Preventive Maintenance Checks Services PMCS for M915A4 Con t Item To Check Not Fully Mission Interval Service Procedure Capable If 48 Weekly Batteries WARNING To avoid eye injury eye protection is required when w
89. ds brush or other materials that will provide traction underneath tires This will guard against tires freezing to the ground or becoming pocketed in ice and will provide some traction when vehicle is started and moving again b Install Tire Chains 1 Lay out chains flat on ground alongside tire to be mounted Untangle any cross chains 2 Open all cams 4 open meaning longest spacing 3 Pick up rear side chains 1 no cams and place over top of tire 4 Tuck last crossmember 2 against bottom of tire with loose side chain 3 sticking out away from tire 5 vehicle in direction of last crossmember 2 approximately 1 4 tire revolution 6 Pull inside side chain 5 snug and hook into appropriate link to hold snug 77 7 Pull outside side chain 6 snug and hook 2 2 99 9 2320 303 10 2 39 OPERATE ON SNOW OR ICE Con t NOTE Hooks must be even Same number of loose links must appear on each side of chain If not even loosen outside hook and rehook both inside and outside hooks until they are even 8 Close cams 4 by inserting key 7 in slot and rotate 180 degrees clockwise Start with cam closes to side chain hook NOTE All four cams should not have to be locked for chain to be tight 9 If additional tightening is required tighten cam on opposite side of tire Continue tightening cams as required 10 If all four cams are ti
90. e does not start within 30 seconds release engine start button Wait three to five minutes before repeating procedure to prevent overheating the starter and damaging batteries of live vehicle If engine does not start after several attempts Unit Maintenance must perform additional maintenance Under no circumstances can the truck be started by being towed or pushed Failure to follow this caution will cause damage to transmission NOTE Before slave starting ensure that checks have been made to determine whether problem is low or dead battery If vehicle other than another M915A4 is used to slave start truck refer to Operator s Manual for that vehicle for any special slave starting procedures a Normal Slave Starting 1 Connect NATO slave cable to receptacle 1 on dead vehicle 2 Connect other end of NATO slave cable to receptacle on live vehicle 3 Start engine of live vehicle and run at 1000 rpm for 15 20 minutes Stop engine and remove NATO slave cable from receptacle 4 Start engine of dead vehicle paragraph 2 12 If engine will not start notify Unit Maintenance 2 88 9 2320 303 10 2 30 SLAVE START TRUCK Con t PER i E rivi WT ri b Emergency Slave Starting 1 Connect NATO slave cable to receptacle 1 on dead vehicle 2 Connect other end of NATO slave cable to receptacle on live vehicle 3 Start engine of live vehicle a
91. ehicle so it does not face into the wind b If vehicle will be parked for a long shutdown period try to park on high ground and use planks or brush to make a raised and relatively dry surface Keep tires out of snow water ice and mud if possible c Clean snow and mud from vehicle as soon as possible after shutdown d If vehicle will be parked for a long period of time have Unit Maintenance remove and store batteries Fill fuel tank to guard against condensation and drain any accumulated water from air reservoirs and fuel filters e X Ensure tires are properly inflated 2 92 9 2320 303 10 2 33 OPERATE EXTREME COLD Con t b Operate Arctic Heater if equipped NOTE e Arctic heater is used to provide engine preheating for engine startup in extreme cold It is also used to provide personnel heat When heater is required to preheat engine coolant and engine block before startup it should be turned on 1 2 1 hour before engine is started Auxiliary heater AUX HTR indicator light illuminates only when burner is lit Indicator light turns on and off automatically 1 Place mode control lever 3 to HEAT 2 Place AUX switch 2 in ON position Green light in switch will illuminate AUX light 1 will light when combustion starts after approximately 50 seconds NOTE If HI LO switch is set to HI position heater will automatically switch to low heat when temperature of coolant
92. el Slide Vent air into cab from heater ventilator defroster and air conditioner Louvered openings are adjustable Selects number of engine cylinders desired for braking action two four or six cylinders Turn on left switch for two cylinders right switch for four cylinders and both switches for all six cylinders Permits repositioning of sliding fifth wheel from inside cab LOCK position deactivates control valve and locks fifth wheel to baseplate UNLOCK position activates control valve to allow changes to total length of tractor trailer and changes to axle loads 2 5 9 2320 303 10 2 2 INSTRUMENT PANEL Con t Five position switch To engage mechanical switch must be held in UNLOCK position up Switch positions are a BO DRIVE Same as BO MARKER position but blackout drive light and trailer circuit will also function b BO MARKER Blackout marker tail lights and blackout stop lights will function other lights or electrical horn will function OFF No lights or electrical horn will function STOP LIGHT Electrical horn and all separately controlled lights will function except blackout stop lights No marker tail lights or drive headlights will function SER DRIVE Same as STOP LIGHT position but headlight and non blackout marker tail lights will function 9 2320 303 10 2 2 INSTRUMENT PANEL Con t Controlorindicator Function 15 Mechanical Switch Spring l
93. ent Consult your NBC Officer or NBC NCO for appropriate handling or disposal procedures IF NBC EXPOSURE IS SUSPECTED ALL AIR FILTER MEDIA WILL BE HANDLED BY PERSONNEL WEARING FULL NBC PROTECTIVE EQUIPMENT SEE OPERATOR MAINTENANCE MANUAL 7690 01 114 3702 To order this NBC decal use National Stock Number NSN 7690 01 114 3702 Part Number PN 12296626 Commercial and Government Entity Code 19207 WARNING PRESSURIZED COOLING SYSTEM DO NOT remove radiator cap unless engine is cold Remove cap in two steps First place thick cloth over cap and slowly turn cap left to first stop Pause and allow pressure to escape Turn cap further left until it can be removed This is a pressurized cooling system and escaping steam hot water or coolant will cause serious burns 9 2320 303 10 WARNING SLAVE STARTING e When slave starting truck use NATO slave cable that DOES NOT have loose or missing insulation DO NOT proceed if suitable cable is not available DO NOT use civilian type jumper cables WARNING TIRE CHANGING Whenever inner and or outer wheel lug nuts require tightening or a wheel has been removed and replaced lug nuts must be torqued to the required torque Failure to follow this warning may result in serious injury to personnel and damage to equipment WARNING TRUCK OPERATION BE ALERT for personnel in area while operating truck Always check to ensure area is clear of personnel and o
94. ent panel mounted speedometer and tachometer which register truck ground speed and engine speed 4 M915A4 has the following capabilities and features a air activated front and rear non asbestos cam brakes with a four channel anti lock brake system ABS to provide significantly improved handling and braking during emergency stops b operation in temperatures from 25 F 32 C to 125 F 52 and to 40 F 40 C with arctic kit installed c start and climb capability of a 20 percent grade at GCWR in both forward and reverse directions d fording capability up to 20 in 51 cm deep for 5 minutes without damage or requiring maintenance before operations can continue e two passenger aluminum corrosion proof cab with a 90 degree tilt forward hood for service accessibility 9 2320 303 10 1 9 EQUIPMENT CHARACTERISTICS CAPABILITIES AND FEATURES Con t f six cylinder 14 liter 400 horsepower in line turbocharged diesel engine built by Cummins g Allison HD 4560P four speed automatic transmission 5 When operating in arctic conditions the M915A4 is equipped with an arctic heater mounted under the cab above the battery box This provides heat for the cab and the engine cooling system arctic heater may be operated prior to starting the engine to provide preheating of engine block 6 Collision Warning System CWS that warns the driver of potentially dangerous driving situatio
95. ewelry or a tool contacts a battery terminal a direct short will result in instant heating damage to equipment and injury to personnel Sulfuric acid contained in batteries can cause serious burns f battery corrosion or electrolyte makes contact with skin eyes or clothing take immediate action to stop the corrosive burning effects Failure to follow these procedures may result in death or serious injury to personnel a Eyes Flush with cold water for no less than 15 minutes and seek medical attention immediately b Skin Flush with large amounts of cold water until all acid is removed Seek medical attention as required c Internal If corrosion or electrolyte is ingested drink large amounts of water or milk Follow with milk of magnesia beaten egg or vegetable oil Seek medical attention immediately d Clothing Equipment Wash area with large amounts of cold water Neutralize acid with baking soda or household ammonia 3 22 9 2320 303 10 3 10 BATTERY BOX COVER REPLACEMENT Con t a Unfasten two latches 3 and slide battery box cover 2 outboard from battery box 4 b Slide battery box cover 2 on battery box 4 with step 1 outboard Fasten two latches 3 3 23 9 2320 303 10 APPENDIX REFERENCES A 1 SCOPE This appendix lists all forms field manuals technical manuals and other publications referenced in this manual and which apply to the operation of the M915A4 truck t
96. floor a Any air leaks are present Brakes fail to hold tractor trailer combination from moving Any temperature or pressure gage does not register X indicates abnormal reading a Brakes pull or grab b Brake pedal is spongy or depresses fully to floor 2 35 9 2320 303 10 Table 2 1 Preventive Maintenance Checks Services PMCS for M915A4 Con t Check Item To Not Fully Mission Interval Service 18 During Steering 19 Power Train During 20 Air Condi tioner During Overall Leakage During Procedure Check for smooth steering without pulling to one side or excessive play more than 2 1 2 in 6 4 in steering wheel Capable If Steering is erratic pulls and has excessive play Unusual noise or vibration is present Check for unusual noise or vibration from engine transmission drive shafts axles and wheels NOTE Perform the following inspection only if air conditioner is required due to climatic conditions Turn air conditioner on and set blower to maximum cooling speed settings Wait five minutes to allow temperature to stabilize Check outlet ducts for cool air air is not cooler than ambient temperature notify supervisor Class 11 coolant or hydraulic leaks or Class Il fuel leaks are evident Be alert for evidence of fluid leakage FRONT AND LEFT SIDE Overall 2 36
97. fy Unit Maintenance to apply proper torque 9 2320 303 10 Table 3 1 Troubleshooting Con t MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION Step 3 Check for worn loose or damaged parts on front axle or suspension Check steering linkage wheels and vehicle frame for worn loose or damaged parts If worn loose or damaged parts are found notify Unit Maintenance 17 VEHICLE STEERING SLOW OR INTERMITTENT TO RESPOND Step 1 Check power steering fluid level If power steering fluid is low fill to correct level Appendix F Step 2 Check for proper operation of power steering With vehicle at halt turn steering wheel in either direction until steer limit is reached Hold steering wheel in position for five seconds Turn steering wheel in other direction until steering limit is reached Repeat cycling a number of times TRANSMISSION 18 SLOW OR ERRATIC TRANSMISSION ENGAGEMENT Check transmission fluid level If transmission fluid is low fill to correct level Appendix F 19 TRANSMISSION FLUID TEMPERATURE GAGE INDICATES FLUID IS OVERHEATING DURING NORMAL OPERATION Step 1 Check transmission fluid level If transmission fluid is low fill to correct level Appendix F Step 2 Check transmission fluid dipstick for discoloration that would indicate water coolant in fluid If dipstick is discolored notify Unit Maintenance WHEELS AND TIRES 20 TIRES WORN UNEVENLY OR EXCESSIVELY Step 1 Check tires fo
98. ght loosen all four cams and resnug side chain at fastener hook until no more than three cams require adjustment 11 Drive approximately 1 2 mile and readjust chains as required 2 100 9 2320 303 10 CHAPTER 3 MAINTENANCE INSTRUCTIONS Section LUBRICATION INSTRUCTIONS 3 1 GENERAL a Lubrication instructions are in Appendix F Jof this manual b All lubrication instructions are mandatory 3 1 This Page Intentionally Left Blank TM 9 2320 303 10 9 2320 303 10 Section Il TROUBLESHOOTING PROCEDURES Paragraph Page Number Paragraph Title Number Explanation of Troubleshooting Symptom Troubleshooting 2 3 2 GENERAL a This section provides information for identifying and correcting malfunctions which may develop while operating the M915A4 b The Troubleshooting Symptom Index in lists common malfunctions which may occur and refers you to the proper page in Table 3 1 for troubleshooting procedure C lf you are unsure of the location of an item mentioned in troubleshooting refer to paragraph 1 10jor Chapter 2 Section d Before performing troubleshooting read and follow all safety instructions found in the Warning Summary at the front of this manual e This section cannot list all malfunctions that may occur nor all tests or inspectio
99. good operating condition and ready for its primary mission 2 8 EXPLANATION OF TABLE ENTRIES a Number No Column Numbers in this column are for reference When completing DA Form 2404 Equipment Inspection and Maintenance Worksheet include the item number for the check service indicating a fault Item numbers also appear in the order that you must perform checks and services for the interval listed b Interval Column This column tells you when you must perform the procedure in the procedure column 1 Before procedures must be done immediately before you operate the truck 2 During procedures must be done while you are operating the truck 3 After procedures must be done immediately after you have operated the truck 4 Weekly procedures must be done once each week 5 Monthly procedures must be done once each month C Location Item to Check Service Column This column provides the location and item to be checked or serviced The item location is underlined 2 25 9 2320 303 10 2 8 EXPLANATION OF TABLE ENTRIES Con t NOTE The WARNINGs and CAUTIONs appearing in your PMCS table should always be observed WARNINGs and CAUTIONs appear before applicable procedures You must observe these WARNINGS to prevent serious injury to yourself and others and CAUTIONS to prevent your equipment from being damaged d Procedure Column This column gives the procedure you must perform to check o
100. h Overall Wheelbase Ground Clearance Angle of Approach Weights Front Axle Loaded Rear Axle Loaded Capacities Engine Oil Refill 6 Cooling System Fuel Tank Power Steering Reservoir Transmission Rear Axle Forward Rear 275 5 in 700 cm 119 in 302 cm 98 in 249 2 _ a a gt 162 in 411 cm 9 in 23 cm 27 18 680 Ib 8481 kg 52 000 Ib 23 608 kg 105 000 Ib 46 670 kg 12 000 Ib 5448 kg 40 000 Ib 18 160 kg 46 qt 43 5 17 25 gal 65 3 I 100 gal 378 5 2qt 1 91 51 qt 481 40 36 pts 19 17 I 1 9 1 11 EQUIPMENT DATA Con t Cylinders Displacement Torque 1500 rpm Maximum Horsepower 2100 TDm i einen Maximum Governed Oil Filter Type Oil Filter Quantity Fuel System Cooling System Radiator Working Pressure Electrical System Batteries Quantity Voltage Transmission Rated Capacity Maximum Steering Angle TM 9 2320 303 10 Cummins 4 stroke in line turbocharged diesel 400 6 855 CID 141 1150 Ib ft 15
101. ht switch up to turn utility lights turn utility lights 2 on UTLY light indicator 5 should come on 3 Move utility light switch down UTLY light indicator 5 should go off Place ignition key in OFF position 4 Place ignition key in OFF position eQgOoOoOOOO 00009069 Q FASTEN SEAT BELT 2 80 9 2320 303 10 2 24 OPERATE LIGHTS Con t d Operate Interior Lights Place ignition key in ON position Slide thumb switch 7 inboard to turn on domelight 8 only Slide thumb switch 7 outboard to turn on domelight 8 and map light 6 Place ignition key in OFF position anann BRON Serra 2 25 RIFLE MOUNTING KIT The rifle mounting kit 1 is located next to shift control 2 81 2 26 2 27 9 2320 303 10 OPERATE HEATER AND DEFROSTER NOTE Heater and defroster obtain heat from engine as it runs If engine is not running heat will not be available for these functions a Start engine paragraph 2 12 and bring truck to normal operating temperature b Slide mode control lever 2 to desired position c Slide temperature control lever 3 to desired temperature range d Rotate fan switch 1 to adjust fan speed from slower to faster as desired e Press FRESH RECIRC air button 4 to desired setting PREPARATION FOR TRANSPORT WARNING e Lifting cables chains hooks and slings used for lifting truck must be in good condition and of suitable capacity Failure to fol
102. imbing on truck 16 Ramp Sloped surface serves as an approach to fifth wheel and facilitates coupling of semitrailer 17 Fifth Wheel Coupling device for semitrailers with kingpins 18 Hosetenna Mounting and stowage location for intervehicular air lines 19 Utility Lights Illuminate area in back of cab There is one light on each side of cab 20 Beacon Warning Light rotating light alerts other vehicles of presence of ruck 21 Intervehicular Contains 12 volt commercial 24 volt military and trailer Receptacles Installation ABS receptacles 22 Antenna Mount Mount for radio antenna 23 Exhaust Muffler Deadens noise of engine exhaust 24 Hood Latch Locks hood closed Located on both sides of hood 1 10 9 2320 303 10 LOCATION AND DESCRIPTION OF MAJOR COMPONENTS Con t CWS Side Sensor 25 26 27 28 29 30 31 Fuel Tank Storage Boxes Mud Flaps Trailer Gladhands Pintle Hook Taillights Side looking collision warning system sensor Holds fuel Steps mounted to tank provide access to cab Provide stowage area for BII and other items Prevent water and debris from spraying up on passers by or towed semitrailer Provide air supply for brakes of trailer Coupling device for trailers with lunettes Contain composite tail stop backup and turn signal lights 1 11 EQUIPMENT DATA Dimensions Length Overall Height Overall Widt
103. ing oil level to the middle of the HOT RUN band 6 FIFTHWHEEL WARNING Dry cleaning solvent is toxic and flammable Always wear protective goggles and gloves and use only in a well ventilated area Avoid contact with skin eyes clothes and DO NOT breathe vapors DO NOT use near open flame or excessive heat The solvent s flash point is 100 F 138 F 38 59 If you become dizzy while using cleaning solvent immediately get fresh air and medical help If solvent contacts eyes immediately wash your eyes and get medical aid Weekly or on condition apply GAA to lock jaws and front of throat Lubricate the cam track pivot rack and slide path with light oil or diesel oil 7 CAN POINTS On condition or weekly lubricate sparingly with OE HDO door hinges and latches View G driver and passenger seat adjusters and sliding tracks View H and spare wheel and tire carrier ratchet gear shaft View 1 9 2320 303 10 Subject Paragraph Page Abbreviations List Of aN Additional Controls and Indicators Air Conditioning System Principles of Operation Air System Principles of Operation Brakes Cage and 2 32 Brakes Principles of 1 19
104. ing two minute period should not exceed 5 psi 34 kPa Close air reservoir draincocks If leaks are present notify Unit Maintenance NOTE Any change in pressure on brake pedal will cause a change in air pressure reading Step 2 Push trailer air supply control knob in ON to charge semitrailer air reservoirs and repeat step 1 Have crewmember check semitrailer for leaks Pressure loss should not exceed 5 psi 34 kPa in two minutes 9 2320 303 10 Table 3 1 Troubleshooting Con t MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION If air leaks are present or reservoir pressure loss exceeds 5 psi 34 kPa in two minutes troubleshoot semitrailer 3 TRAILER BRAKES WILL NOT APPLY WHEN PEDAL OR HAND CONTROL ON STEERING COLUMN IS USED Check intervehicular air hoses for proper connections to semitrailer Connect air hoses 4 TRAILER BRAKES WILL NOT RELEASE Step 1 Check position of trailer brake hand control Move control to forward OFF position Step 2 Check position of trailer air supply control knob Push knob in ON Step 3 Check intervehicular air hoses for proper connections Connect air hoses Step 4 Check vehicle air system for leaks If leaks are found notify Unit Maintenance If leaks are not found and vehicle components are not damaged troubleshoot semitrailer DRIVELINE LOCKING SYSTEM 5 DRIVELINE WILL NOT DISENGAGE WHEN INTERAXLE LOCKOUT CONTROL VALVE LEVER IS MOVED TO UNLOCK POSITION
105. ire Overall a Check truck for a Damage that would impair View obvious damage that operation is evident would impair operation Visually check for b Any tire is missing missing or damaged damaged Lug nuts are tires Check lug nuts loose or missing to ensure they are at least finger tight 2 29 9 2320 303 10 Table 2 1 Preventive Maintenance Checks Services PMCS for M915A4 Con t Location EE To Check Not Fully Mission Interval Service Procedure Capable If 5 Cab Check for damage to Damage that would interfere Exterior lights 9 side mirror 11 with visibility impair cab a 8 es operation is evident b steps 13 and CWS side sensor 12 NOTE Refer to Chapter 2 Section l for the location of all gages switches and indicator lights Check for damage to Any gage is broken gages switches unreadable indicator and warning lights Before Fire a Check for missing or a Fire extinguisher is Extin damaged fire missing or damaged guisher extinguisher 14 b Check gage 15 for b Pressure gage needle is in proper pressure of recharge area 150 psi 2 30 9 2320 303 10 Table 2 1 Preventive Maintenance Checks Services PMCS for M915A4 Con t Location EE To Check Not Fully Mission Interval Service Procedure Capable If Before Fire c Check for damaged or c Seal is broken or missing
106. isible in sight glass Wheel 25 and rubber plug 24 Bearings is installed oil is not visible in sight glass remove plug and add until level is even with plug opening Appendix 2 45 9 2320 303 10 Table 2 1 Preventive Maintenance Checks Services PMCS for M915A4 Con t Item To Check Not Fully Mission Interval Service Procedure Capable If 37 Trans CAUTION mission Transmission must not be operating for extended periods of time until a Hot Check has verified proper fluid level Transmission damage can result from extended operation at improper fluid level conditions With truck on level ground start engine and run at idle with transmission Neutral N until transmission oil temperature gage registers 60 120 F 16 49 Perform cold oil check Appendx When temperature has reached 160 200 F 71 93 C perform hot check transmission fluid required through fill tube 47 until level on dipstick p is correct F Shut down engine 2 46 9 2320 303 10 Table 2 1 Preventive Maintenance Checks Services PMCS for M915A4 Con t Item To Check Not Fully Mission Interval Service Procedure Capable If 38 Air Res NOTE ervoirs Perform the following service at all air reservoirs Open air reservoir drain valves 49 using cable pulls if present and allow all air liquid condensation to dr
107. kPa ETE 100 psi 690 kPa SPAS acest e ERR MA 105 psi 724 kPa Steering Ross Steering Gear single gear Xen MEME CIE hydraulic power booster Power Steering Pump esee Eaton B165R Turning Diameter eese 53 ft 9 in 16 4 m Steering Column and Wheel DRS eio o tae aa HM tilt telescoping Tilt Range eerie eiecit reines 15 Telescoping 2 5 8 in 67 mm 1 11 1 11 EQUIPMENT DATA Con t Towing Attachments Cab Pintle Hook Towing Eyes Quantity aes Maximum Load Capacity Each Up to 45 Angle Front Long Axis Fifth Wheel Capacity nee peat Ln pute Height Empty E Pitch FWd Aft ecoute Kingplr Slze oie cocco Accessories Utility Elghts uec eroe rhe ret Air HOM ee eoo e Military Load Classification Mehicle w o euis Vehicle w Trailer TM 9 2320 303 10 Holland no 760 30 tons 27 2 metric tons 2 front 2 rear 60 000 Ib 27 240 kg Holland 36 in 91 4 cm diameter 2 way oscillating low lube 30 000 Ib 13 620 kg 51 in 129 5 cm 15 10 2 in 5 1 cm Freightliner
108. llow truck to coast in Neutral N This can result in severe transmission damage When in N engine braking is not available 2 Neutral Neutral is the normal transmission position when vehicle is not in use Use N to start engine to check vehicle accessories and for extended periods of engine idling Light on panel will illuminate and the digital display will display N when transmission is in neutral Vehicle ECU automatically selects NEUTRAL when starting vehicle 3 Drive D When placed in Drive D the transmission starts out in 1st gear and automaticaly progresses to the 4th gear During slowdown transmission automatically downshifts Light on panel will illuminate and the digital display will display the highest forward gear attainable a select a specific forward gear press the up or down arrow pushbuttons NOTE Even when a lower gear is selected transmission may not downshift until vehicle speed is reduced b digital display will display the selected gear c greater the need for engine power or engine braking power the lower the gear selection should be d Gears 2 and 3 Use 2nd or 3rd gears when road load or traffic conditions make it preferable to use lower gears e Gear 1 1st gear is the low gear used for pulling through mud snow or going up steep grades This position also offers maximum engine braking power f When conditions improve return vehicle to Drive D b Oper
109. llowing 1 Ensure transmission is in Neutral N 2 Apply truck parking brake and semitrailer brakes 3 Chock wheels and take any other steps to keep vehicle from moving 2 16 SHUT DOWN ENGINE CAUTION Improper engine shutdown could damage turbocharger a Run engine at idle for four to five minutes b Turn all accessories off paragraph 2 2 c Move ignition switch to OFF position d Perform After operation PMCS Chapter 2 Section 11 e Place master battery switch to OFF 2 71 9 2320 303 10 2 17 OPERATE SLIDING FIFTH WHEEL CAUTION The M915A4 is designed to be used with M871 M872 and M1062 semitrailers only Other semitrailers may cause equipment damage Semitrailer must be blocked and semitrailer brakes locked to prevent damage to tractor or semitrailer by uncontrolled sliding of fifth wheel e If towing M872 semitrailer rear mud flaps must be removed and stowed in brackets provided Failure to do so will cause equipment damage e Truck tractors have the capability to turn greater than 90 Care must be taken to avoid hitting semitrailer with tractor when turning more than 90 Operator must use caution when cresting hills which cause the truck tractor to have a nose down angle greater than 4 with respect to towed semitrailer Damage to vehicle or loss of control could occur a Locktrailer brakes and or chock trailer wheels b Place fifth wheel slide control valve lever b in UNLO
110. low this warning may result in injury or death to personnel and damage to equipment Improper use of lifting equipment and improper attachment of cables to vehicle can result in serious personnel injury and equipment damage Observe all standard rules of safety a To lift vehicle attach suitable lifting device to lifting shackles Lift vehicle slowly and have observers watch for any signs of cable failure unusual load shifts and obstructions 2 82 b During transport secure vehicle by attaching cables to tiedown points 9 2320 303 10 2 27 PREPARATION FOR TRANSPORT Con t CAUTION e Front extendable bumper is for overhead sling use only It is not intended to be used to tow or extract a mired vehicle DO NOT extend the bumper more than one adjustment hole ALWAYS have both pins engaging the bumper and bumper extension on each side Failure to follow this caution could result in damage to equipment To avoid damage to cab always extend bumpers when using a four point sling lift NOTE Both left and right side bumper extensions are adjusted in the same manner Right side is shown c Remove two retaining pins 1 two flat washers 2 and two straight pins 3 from front bumper 4 d Position bumper extension 6 in front bumper 4 so straight pins 3 will engage two inside adjustment holes 5 on bumper extension e Install two straight pins 3 two flatwashers 2 and two retaining pins 1 in front
111. n release stud 2 91 9 2320 303 10 2 33 OPERATE IN EXTREME COLD a General 1 Extreme cold causes many problems a Lubricants thicken or congeal b Batteries may freeze or lose their electrical efficiency c Fuel may not readily atomize for combustion d Various materials will become hard brittle and easily damaged e The cooling system requires adequate protection from extreme cold f Fuels lubricants and antifreeze compounds require special storage handling and use 2 Referto FM 9 207 for additional information 3 Arctic Heater Kit All vehicles assigned to arctic regions are equipped with an auxiliary arctic heater kit which protects vehicle systems from freeze damage enables easier starting by providing engine block preheating and boosts cab heat output Refer to subparagraph b for operation of arctic heater 4 Starting Out a Be careful when you first start your vehicle Use ld weather starting procedure and allow engine time to reach operating temperature range of 120 140 F 48 59 Be alert that tires may be frozen to ground b Start driving very slowly for about 100 yards 91 4 m Be alert for signs that tires may have flat spots or that one or more brake shoes may be frozen and require preheating Notify Unit Maintenance as required b Parking a If vehicle will be parked for a short period park in a sheltered area out of wind If shelter is not available park v
112. n t NOTE Perform steps i through if outside temperature is at or below 32 F 0 C h Perform steps a through e CAUTION e Never press ether quickstart button unless cranking engine simultaneously Buildup of ether fumes may result in combustion in intake manifold DO NOT operate starter motor for more than 30 seconds at a time After 30 seconds allow starter motor to cool for at least two minutes before attempting to start engine again Excessive heating of starter motor may result in damage or early starter failure i Press engine start button and at the same time press ether quick start button once j When engine starts release engine start button CAUTION DO NOT run engine above idle speed until oil pressure gage indicates at least 15 psi 100 kPa at idle speed k Do not run engine above 600 rpm until normal oil pressure 15 psi is indicated on engine oil pressure gage Monitor gages and indicators If after ten seconds there is no indication of oil pressure shut down engine paragraph 2 16 and perform troubleshooting Chapter 3 Section Ii 1 2 65 9 2320 303 10 2 13 OPERATE TRANSMISSION a Transmission Ranges 1 Reverse R Reverse R is used to back up the vehicle Vehicle must be brought to a complete stop before shifting from a forward range to R or visa versa Light on panel will illuminate and the digital display will display R when reverse is attained CAUTION DO NOT a
113. nd body lights clean and free of snow and ice Use defroster to help keep glass free of snow and ice g Descend moderate grades in gear normally used for ascending same grade On steep or very slippery grades place interaxle lockout control valve lever in LOCK position and use at least one gear lower h After driving through slush or water drive slowly and test brakes Keep driving slowly maintaining moderate pressure on service brake pedal to create a slight drag When brakes are dry and operating properly resume normal speed 2 97 9 2320 303 10 2 39 OPERATE ON SNOW OR ICE Con t i If a difficult stretch of road approaches stop and inspect it carefully before driving on it Select transmission gear range that best suits road condition and place interaxle lockout control valve lever in LOCK position NOTE Shifts from Neutral N to Drive D or to Reverse R cannot occur if engine speed is above idle Reduce engine speed to idle and shift again If vehicle becomes stuck or tires start spinning it may be possible to rock vehicle out Lock interaxle lockout and shift transmission to D Drive Apply light steady throttle never full throttle When vehicle has moved as far as it will go apply service brakes and allow engine to return to idle speed Shift transmission to R Reverse Again apply light steady throttle and allow vehicle to move rearward as far as it will go Apply service brakes and allow engine to
114. nd run at 700 rpm 4 Start engine of dead vehicle and allow both vehicles to o ten minutes If engine will not start notify Unit Maintenance S 6 Remove NATO slave cable from receptacle on live vehicle Remove NATO slave cable from receptacle 1 on dead vehicle idle for five t 2 31 TOW TRUCK a General 1 Notify Unit Maintenance to send recovery vehicle and tools required to remove propeller shafts 2 Refer to FM 21 305 for general guidelines on vehicle recovery and use of warning kits and signals Refer to FM 21 305 and FM 20 22 for additional information CAUTION Propeller shafts must be disconnected and interaxle lockout control valve switch must be in UNLOCK position before towing tuck with all wheels on the ground Failure to follow this caution may result in transmission damage 3 When towing truck with front axle and rear tandem on ground ensure that interaxle lockout control valve lever is in UNLOCK position Ensure that universal joint on rear of propeller shaft at the input to the forward rear axle is disconnected and tied up to vehicle undercarriage 2 89 9 2320 303 10 2 31 TOW TRUCK Con t 4 When front axle of truck being towed is lifted off the ground disconnect universal joint on propeller lever at the input to the forward rear axle and tie it up to vehicle undercarriage 5 When rear tandem axles of truck being towed are lifted off ground ensure interaxle lo
115. nd the power on LED test is complete When pushed in until a distinctive click is heard and or felt turns the power ON or OFF Adjusts the volume of the driver display unit speaker Activates Failure Display Mode when the knob is pressed and held for five seconds and released Located under the top cover of the driver display unit Sounds audible tones to alert the driver of a possible hazard May be set to limit the volume to a minimum level 2 21 9 2320 303 10 2 6 ADDITIONAL CONTROLS AND INDICATORS Con t Controlorindicator Function Range Control and When rotated this control provides detection range Accident Recorder adjustment of the first alert between 3 and 2 125 Selection seconds Function may be configured to prevent range adjustment control Accident Reconstruction is initiated by pushing and holding this knob for 5 seconds thereby freezing the most recent data in half of the allocated memory Light Sensor Photo sensor that senses ambient lighting and adjusts intensity of the indicator lights accordingly i e increases brightness of indicator lights in daytime and decreases brightness of indicator lights at nighttime Red Accompanied with This indicator illuminates when an object is detected at Yellow and Orange 1 second with vehicle opening and no tone with vehicle closing accompanied by audible tones At a 1 2 second or less following interval opening and closing the tones are repeated
116. ngpin f Back up slowly until fifth wheel locks firmly to kingpin 2 74 2 18 9 2320 303 10 COUPLE SEMITRAILER Con t Check kingpin connection and fifth wheel slide locks by pulling tractor gently forward against locked semitrailer brakes or blocked wheels resistance is felt select transmission shift selector Reverse R pushbutton and gently back tractor to verify fifth wheel slide locks in both directions When resistance is felt select transmission shift selector Neutral N pushbutton and set parking brake 2 19 h j k Verify that lock release handles are in Check semitrailer lights Stow wheel blocks Lift and secure semitrailer landing gear and stow float pads UNCOUPLE FROM SEMITRAILER WARNING Use caution when uncoupling from semitrailer BE ALERT for personnel in area Ensure that hands arms and body are clear of potential pinch points Failure to follow this warning may result in injury to personnel NOTE e Truck and semitrailer must be aligned e Use ground guide if one is available Stop truck and semitrailer Shift transmission into Neutral N paragraph 2 13 Block wheels as required Pull semitrailer air supply valve OUT Apply parking brake Place float pads under semitrailer landing gear and lower landing gear Set semitrailer hand brake control valve and close semitrailer air supply valve Disconnect and stow semitraile
117. ns and corrective actions If a malfunction is not listed or is not corrected by the listed corrective actions notify your supervisor f When troubleshooting a malfunction 1 Locate the symptom or symptoms in paragraph 3 4 that best describe the malfunction 2 Tum to the page in Table 3 1 where the troubleshooting procedures for the malfunction in question are described Headings at the top of each page show how each troubleshooting procedure is organized MALFUNCTION TEST OR INSPECTION in step number order and CORRECTIVE ACTION 3 Perform each step in the order listed until the malfunction is corrected DO NOT perform any maintenance task unless the troubleshooting procedure tells you to do so 3 3 EXPLANATION OF COLUMNS The columns in Table 3 1 are defined as follows a MALFUNCTION visual or operational indication that something is wrong with the equipment b TEST INSPECTION procedure to isolate the problem in a system or component c CORRECTIVE ACTION procedure to correct the problem 3 3 9 2320 303 10 3 4 TROUBLESHOOTING SYMPTOM INDEX Troubleshooting Procedure Page AIR SYSTEM AND BRAKES Air Reservoir Pressure Low Warning Light and Buzzer are ON 3 6 System Loses Pressure During Vehicle Operation or Low Air Pressure Warning Light and Buzzer Come On During Vehicle 3 6 Trailer Brakes Will Not Apply When Pedal o
118. ns by activating visual and audible alerts 1 10 AND DESCRIPTION OF MAJOR COMPONENTS M y EDT iH m ON ji of 9 2320 303 10 1 10 AND DESCRIPTION OF MAJOR COMPONENTS Con t Marker Clearance Lights Side Mirrors Heated Grabhandles Utility Power Receptacle Air Horn Master Battery Switch Spare Wheel and Tire Battery Box and Steps Front Service Lights Bumper Extensions Blackout Lights Towing Eyes CWS Antenna Brush Guard Spotting Mirrors Indicate outline of truck Provide driver with a view of sides of truck Provide a hand hold for personnel climbing on truck Supplies power for work lights Located on both sides of truck Provides an audible alert Provides battery power to truck Extra wheel and tire used in case of a flat tire Holds vehicle batteries and provides steps to access cab Include headlights and turn signals Provide adjustable attachment point for slings Include marker and Used during blackout conditions drive lights Provide attachment points for towing device Forward looking collision warning system antenna Protects front of hood and components under hood from damage Provide added visibility to sides of truck and semitrailer if towing 9 2320 303 10 1 10 AND DESCRIPTION MAJOR COMPONENTS Con t 19 20 21 22 Description 3 Grabhandles Provide a hand hold for personnel cl
119. ntrol Lever 30 31 32 33 34 35 Controlorindicator Function Turns windshield wipers on off Clockwise is ON Counterclockwise is OFF To wash windshield press knob in to spray water and to turn wipers on ON OFF toggle switch controls mirror heat for defrosting Lights up when arctic heater burner is lit Operates arctic heater Positions are ON and OFF When set to ON a green light integrated into switch is illuminated Controls rate of heating for arctic heater If set at heater burner will go on when coolant temperature at inlet to heater is 167 F 75 C LO is suitable for standby operation Allows A C VENT and HEAT modes to be used with recirculated or fresh air When mode control lever is at HEAT DEF or DEF system draws in fresh air regardless of button setting When MAX is selected system draws recirculated air regardless of button setting Controls four speed fan Positions are OFF 1 2 3 and 4 Position 4 is maximum fan speed Allows selection of modes of operation Modes are MAX A C VENT HEAT HEAT DEF and DEF Lever must be set to HEAT for arctic heater to operate Allows selection of a full range of temperatures from COOL to WARM 2 9 2 2 9 2320 303 10 INSTRUMENT PANEL Con t e Indicator and Warning Lamps 36 37 38 39 40 41 36 Q FASTEN SEAT BELT Control or Indicator Function Turn Signal Indicators High Beam Indicator Light Mirror Hea
120. oaded two position switch Switch positions are a LOCK Down position prevents movement of main light switch b UNLOCK position Up position enables movement of main light switch Hold lever in UNLOCK position and move main light switch to desired position 16 Auxiliary Switch Four position switch Will not function if main light switch is OFF Switch positions are PANEL BRT Bright panel lights will function except if main light switch is in OFF BO DRIVE or BO MARKER positions b PANEL DIM Same as PANEL BRT position but panel lights dimmer switch may dim lights c PANEL OFF Panel lights will not function d PARK When main light switch is in SER DRIVE position headlights will be deactivated leaving all service marker tail lights functioning 17 Parking Brake Control Yellow diamond shaped knob operates parking brake valve Pull out to apply and push in to release parking brake 18 Trailer Air Supply Control Red octagonal shaped knob supplies air to trailer air reservoirs Push in to charge trailer air supply and release trailer spring brakes Pull out to shut off air supply and apply trailer spring brakes 19 Interaxle Lockout Control Locks and unlocks driveline based on changing driving Valve Lever conditions a LOCK In poor traction conditions stop vehicle and place lever in LOCK position to lock up driveline b UNLOCK When conditions are back to normal move left to UNLOCK while vehicle is moving
121. on components are damaged notify Unit Maintenance 9 2320 303 10 Section MAINTENANCE PROCEDURES Paragraph Page Number Paragraph Title Number Cleaning 20444000 a m Hag Operation of Spare Wheel and Tire Assembly Carrier Wheel and Tire Assembly Battery Box Cover Replacement 2 3 5 CLEANING VEHICLE WARNING Compressed air used for cleaning or drying purposes or for clearing restrictions should never exceed 30 psi 207 kPa Wear protective clothing goggles shield gloves etc and use caution to avoid injury to personnel CAUTION DO NOT use high pressure water to clean inside of cab or engine compartment Damage to electrical system may result a Exterior 1 Never wipe dirt off when vehicle is dry 2 Never wash vehicle in direct sunlight or if vehicle exterior is hot to touch 3 Wash vehicle often using cold or lukewarm water never use hot water or any strong detergent Do not use abrasives to remove mud and dirt from your vehicle 4 While cleaning vehicle look closely for evidence of rust or corrosion bare metal or other exterior damage If any problems are found notify Unit Maintenance to treat affected areas b Interior 1 Remove loose dust and dirt from cab interior components 2 Clean upholstery and seat belts
122. or destruction of Army materiel to prevent enemy use refer to TM 750 244 6 1 5 REPORTING EQUIPMENT IMPROVEMENT RECOMMENDATIONS EIRs If your truck needs improvement let us know Send us an EIR You the user are the only one who can tell us what you don t like about your equipment Let us know why you don t like the design or performance Put it on an SF Form 368 Product Quality Deficiency Report Mail it to us at Commander U S Army Tank automotive and Armaments Command ATTN AMSTA AC NML Rock Island Illinois 61299 7630 We ll send you a reply 1 6 WARRANTY INFORMATION The vehicles are warranted by Freightliner Corporation in accordance with 9 2320 303 15 Warranty starts on the date found in block 23 DA Form 2408 9 in the logbook Report all defects in material or workmanship to your supervisor who will take appropriate action through your Unit Maintenance shop 9 2320 303 10 1 7 NOMENCLATURE CROSS REFERENCE LIST Common Name Official Nomenclature Cold Start Systelri s otio teet ccm Ether Quick Start System Differential LOCK UNIOCK Interaxle Lockout Engine Coolant trout eet ee exe ee Ur Antifreeze Ethylene Glycol Mixture ladhand tette pene e oh eae geet aie ea ete Quick Disconnect Coupling Jake Brake 20 2 E Engine Brake MEET Seat Belt Adjustment No Spin cnni Automatic Locking Positive Traction Differential 1 8 LIST OF ABBR
123. orking around batteries Do not smoke use open flame make sparks or create other ignition sources around batteries If a battery is giving off gases it can explode and cause injury to personnel Remove all jewelry such as rings ID tags watches and bracelets If jewelry or a tool contacts a battery terminal a direct short will result in an instant heating damage to Mio d M injury to personnel CAUTION To reduce battery damage do not remove batteries from vehicle equipment battery compartment unless the battery compartment is corroded greenish white powder Do not jerk or pull on battery cables during visual inspection Battery replacement will be performed by Unit Maintenance personnel Release latches 59 a One or more batteries are and remove cover damaged or missing 56 Check battery compartment for damaged or missing batteries Check for damaged or b One or more filler caps are missing filler caps 57 damaged or missing Check for missing c Cables missing broken split or frayed broken split or frayed cables 60 Check for damaged d Terminal posts are terminal posts 58 damaged 2 52 9 2320 303 10 Table 2 1 Preventive Maintenance Checks Services PMCS for M915A4 Con t Item To Check Not Fully Mission Interval Service Procedure Capable If 48 Weekly Batteries e Check for rust and corrosion Check for cleanliness Report any problems
124. ote 3 C See View A Wheel Bearings case Check and Fill Check amp Fill C See View D amp Note 4 Transmission Steering Reser Check amp Fill C voir See View E amp Check amp Fill C Note 5 See View C amp Note 2 Fuel Filter Water Fifth Wheel Clean amp Lube See View F and Note 6 F 3 9 2320 303 10 Expected Temperatures 6 to Lubricant Refill 122 F Intervals Component Capacity 14 C to 50 C OE HDO D Daily MIL L 2104 W Weekly Lubricating Oil ICE On Tactical Condition OEA MIL L 46167 Lubricating Oil ICE Arctic Engine Crankcase 46 Qt See Chart A w Filters 43 5 L Transmission 51 Qt See Chart B Power Steering 2 Qt See Chart A Reservoir 1 9 L Oil Can Points As Read See Chart A GO MIL L 2105 Lubricating Gear Multipurpose Front Axle Wheel As See Chart C Bearings MIL G 10924 Grease Automotive and Artillery Fifth Wheel All Temperatures Multi Engine Type 1 65 3 L Arctic Operation refer to FM 207 9 2320 303 10 CHART A ENGINE POWER STEERING AND OIL CAN POINTS EXPECTED TEMPERATURES End d EG d ue meet peperere spe Ee ee ue ann OE HDO Lubricating Oil ICE MIL L 2104 Tactical ae Oil ICE bnt L 46167 ae if
125. plished by pressing up or down arrow buttons shifting can also be done automatically MODE button is for unit maintenance use only 2 5 SEAT CONTROLS Control or Indicator Lumbar Adjustment Knob Seat Back Adjustment Lever Seat Height Adjustment Control Valve Lever Seat Cushion Tilt Adjustment Knob Fore and Aft Seat Adjustment Lever TM 9 2320 303 10 y 4 Controls lumbar support in seat Rotate knob forward to increase and rearward to decrease lumbar support Adjusts seat back angle Apply or remove pressure from seat back and hold lever rearward to adjust Vehicle air pressure must be above 60 psi 414 kPa to operate lever Push lever up to raise seat and down to lower seat Rotate knob to increase or decrease seat tilt Three position lever moves seat forward or backward Right position locks seat in place Moving lever all the way left adjusts seat Traveling position is center position which provides a shock absorbing effect 2 15 9 2320 303 10 2 5 SEAT CONTROLS Con t gt TALES 4 FOI NAE EET ENTE j gt a Control or Indicator Seat Belt Three point belt locks into tether belt Tether Belt Adjustable belt located on both sides of seat 2 16 9 2320 303 10 2 6 ADDITIONAL CONTROLS AND INDICATORS Control or Indicator Cab Vent Window Handle Air Horn Cable Door Opening Handle
126. ppendix F 2 37 9 2320 303 10 Table 2 1 Preventive Maintenance Checks Services PMCS for M915A4 Con t Item To Check Not Fully Mission Interval Service Procedure Capable If 25 Power With fluid at operating Steering temperature and engine Reservoir running remove dipstick 26 and check level of power steering fluid in reservoir 27 Add fluid as required if level is below add mark Appendix F Fuel WARNING Filters DO perform fuel system checks inspections or maintenance while smoking or near fire flames or sparks Fuel may ignite causing damage to vehicle and injury or death to personnel 2 38 9 2320 303 10 Table 2 1 Preventive Maintenance Checks Services PMCS for M915A4 Con t Item To Check Not Fully Mission Interval Service Procedure Capable If 26 NOTE Filters Both primary fuel filter mounted on engine and fuel filter water separator mounted on left frame rail should be drained e Ensure that a suitable container is used to catch fluid Turn drain knob 29 counterclockwise and drain all water from fuel filters 28 knob clockwise to close 2 39 9 2320 303 10 Table 2 1 Preventive Maintenance Checks Services PMCS for M915A4 Con t Item To Check Not Fully Mission Interval Service Procedure Capable If 27 After Interve Check for presence and Air hose gladhand hicular gener
127. r Hand Control on Steering Column is Used 3 7 altre 3 7 DRIVELINE LOCKING SYSTEM Driveline Will Not Disengage When Interaxle Lockout Control Valve Lever is Moved to UNLOCK Position 3 7 ELECTRICAL SYSTEM One or More Lighting Systems 2 3 8 ENGINE Engine Coolant Temperature Gage Indicates Engine is Overheating 3 8 Cranks but Fails to 3 9 Does Not Develop Full POWel E 3 9 ori 3 9 Excessive Engine Oil Exhaust Smoke At Normal Engine Operating Fails to Crank When Starter Button is Starts but Misfires or Runs Rough After Proper Warmup Period Low No Engine Oil STEERING Hard Steering Shimmy or 3 10 Vehicle Steering Slow or Intermittent to 3 11 TRANSMISSION Slow or Erratic Transmission 3 11 Transmission Fluid Temperature Gage Indicates Fluid is Overheating During Normal 3 11 3 4 9 2320 303 10 3 4 TROUBLESHO
128. r air supply lines and intervehicular cable If connected disconnect and stow ABS electrical cable Pull secondary lock release handle 2 out and lift to engage catch Pull primary lock release handle 1 out Release parking brake and slowly pull forward until semitrailer clears fifth wheel 2 75 9 2320 303 10 2 19 FROM SEMITRAILER Con t m Stop and set parking brake paragraph 2 2 2 20 PINTLE TOWING PROCEDURES a Remove cotter pin 3 engage latch 4 and lift lock 5 to open position b Connecttrailer to pintle hook 6 c Push lock 5 down ensuring latch 4 engages and install cotterpin 3 d Connect intervehicular electric cable from receptacle 1 on rear of vehicle to trailer e Conned air hoses from trailer to quick disconnect couplings 2 at rear of vehicle f Connect safety chains WARNING Failure to completely turn ON or OFF air cutoff valve will cause loss of brakes on trailer or truck 0 Open trailer air supply valve on hosetenna behind cab and push in trailer air supply knob on instrument panel 2 76 2 21 9 2320 303 10 MUD FLAP STOWAGE CAUTION If towing M872 semitrailer rear mud flaps must be removed and stowed in brackets Failure to follow this caution may result in equipment damage a Remove lock pin 1 b Pull up on mud flap 2 and remove Tap spring upward with hammer as required c Place mud flap 2 in stowage bracket 3
129. r pressure drops to 35 45 psi 241 310 kPa e The vehicle has a four channel anti lock brake system ABS and cam operated service brakes with non asbestos brakeshoes f The M915A4 has automatically adjusting slack adjusters On all axles brake chambers have a stroke alert indicator which allows the operator to monitor brakeshoe wear AIR GAGES BRAKE SECONDARY PRIMARY CONTROL e O REAR AXLE SPRING BRAKE CHAMBERS A m p 29 5 AXLE BRAKE CHAMBERS COMPRESSOR 9 2320 303 10 1 20 5 The power steering system consists of an integral steering gear which includes a manual steering mechanism and hydraulic control valve hydraulic hoses power steering pump reservoir and other components b The power steering pump driven by the engine provides the power assist for the steering system POWER STEERING PUMP STEERING GEAR RESERVOIR 1 19 9 2320 303 10 1 21 AIR CONDITIONING SYSTEM The air conditioning unit is part of the heater and is mounted under the glove compartment lt is a single unit consisting of heater core air conditioning evaporator coil blower motor control valves and air ducts b The system is turned on by the mode control lever on instrument panel in cab The four speed blower switch controls flow rate c An even cab temperature is maintained by controlling the coolant flow through the heater core or ref
130. r proper pressure Inflate tires to proper pressure Table 2 1 Step 2 Check for bent wheel rims If rim is bent replace wheel and tire assembly Notify Unit Maintenance to apply proper torque 3 11 9 2320 303 10 Table 3 1 Troubleshooting Con t MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION Step 3 Check for loose lugs nuts and worn loose or damaged suspension components Tighten loose lug nuts and notify Unit Maintenance to apply proper torque If suspension components are worn loose or damaged notify Unit Maintenance 21 VEHICLE WANDERS OR PULLS TO ONE SIDE ON LEVEL PAVEMENT Step 1 Check tires for proper pressure Inflate tires to proper pressure Table 2 1 Step 2 Check that tires are proper size and type If one tire is mismatched and spare matches replace mismatched tire with spare If one or more tires are mismatched notify Unit Maintenance Step 3 Check for loose or damaged steering gear linkage If steering gear linkage is loose or damaged notify Unit Maintenance 22 WHEEL WOBBLES Step 1 Check for loose or missing lug nuts Tighten loose lug nuts and notify Unit Maintenance to apply proper torque If lug nuts are missing notify Unit Maintenance Step 2 Check for bent wheel rims If rim is bent replace wheel and tire assembly Notify Unit Maintenance to apply proper torque Step 3 Check for loose worn or damaged steering and suspension components If steering or suspensi
131. r service the item listed in the Item to Check Service column to know if the equipment is ready or available for its intended mission or for operation You must perform the procedure at the time stated in the interval column e Not Fully Mission Capable If Column Information in this column tells you what faults will keep your equipment from being capable of performing its primary mission If you make check and service procedures that show faults listed in this column the equipment is not mission capable Follow standard operating procedures for maintaining the equipment or reporting equipment failure 2 9 GENERAL PMCS PROCEDURES a Always perform PMCS in the same order so it gets to be a habit Once you ve had some practice you ll spot anything wrong in a hurry If the truck does not perform as required refer to the appropriate troubleshooting procedure in Chapter Section Il b If anything looks wrong and you can t fix it write it on your DA Form 2404 If you find something seriously wrong IMMEDIATELY report it to your supervisor c Before performing preventive maintenance read all the checks required for the applicable interval and prepare all the tools you need to make all the checks You ll always need a rag Item 15 or two WARNING Dry cleaning solvent is toxic and flammable Always wear protective goggles and gloves and use only in a well ventilated area Avoid contact with skin eyes and clothes and DO NOT breathe v
132. ractor A 2 PUBLICATION INDEXES The following indexes should be consulted frequently for latest changes or revisions and for new publications relating to material covered in this technical manual Consolidated Index of Army Publications and Blank Forms DA Pam 25 30 Functional User s Manual for the Army Maintenance Management System DA Pam 738 750 U S Army Equipment Index of Modification Work Orders DA Pam 750 10 A 3 FORMS Refer to DA Pam 738 750 The Army Maintenance Management System TAMMS for instructions on the use of maintenance forms Equipment Inspection and Maintenance Worksheet DA Form 2404 Product Quality Deficiency Report sse SF Form 368 Recommended Changes to Equipment Technical Publications DA Form 2028 2 Recommended Changes to Publications and Blank Forms DA Form 2028 4 FIELD MANUALS Basic Cold Weather FM 31 70 aisia FM 5 20 Cold Weather Operations FM 9 207 Desert 90 3 Driver 21 300 First Ald for Soldiers 9 eoe ees eee e gar FM 21 11 Manual for the Wheeled Vehicle
133. radiator and a belt driven fan The cooling system cools the engine by means of circulating pressurized ethylene glycol based coolant through the engine and radiator RADIATOR CAP m qe hc zat RADIATOR Cans ex pea T IE pl CIRCULATING Ig PUMP ml THERMOSTAT 9 2320 303 10 1 17 ELECTRICAL SYSTEM a Four 12 volt batteries connected in series parallel supply the 12 volt electrical system and provide 24 volts for the starter motor blackout lights accessories and trailer connectors b The Dual Voltage Alternator Control DUVAC mounted on the firewall in the engine compartment regulates the distribution of 12 and 24 volts TO IGN TWINPUT VOLTAGE REGULATOR 611 Wl 24 VOLT ALTERNATOR VOLTAGE DETECTOR l 4 12V0LT TO 24 VOLT LOADS 12 VOLT BATTERY BATTERY 12 VOLT 12 VOLT A BATTERY A BATTERY 2 eT 1 18 SYSTEM air system consists of the air compressor air dryer air reservoirs and various air lines Also included in the air system am the air pressure gages located on the dashboard which used for monitoring air pressure for safe operation of all air operated components of the vehicle 9 2320 303 10 1 18 AIR SYSTEM Con t AIR GAGES SECONDARY PRIMARY vA 57 2 OF HOLDING TANKS COMPRESS
134. rear of vehicle c Start engine paragraph 2 12 Push in ON trailer air supply control valve 9 2320 303 10 3 7 TIRE INFLATION Con t d Remove valve stem cap 3 and connect pneumatic hose 1 to valve stem 4 e Add air until desired pressure is reached f Remove pneumatic hose 1 from valve stem 4 and install valve stem cap 3 Pull out OFF trailer air supply control valve Shut down engine 2 16 h Disconnect pneumatic hose 1 from emergency gladhand 2 and return to stowage in BII storage box 3 8 OPERATION OF SPARE WHEEL AND TIRE ASSEMBLY CARRIER a Remove Spare Wheel and Tire Assembly from Carrier 1 Ensure pawl 2 engages gear shaft 1 and remove two nut 4 2 Turn gear shaft 1 clockwise slightly and disengage pawl 2 from gear shaft Swing pawl out of way 9 2320 303 10 3 8 OPERATION SPARE WHEEL AND TIRE ASSEMBLY CARRIER Con t WARNING Use caution when lifting or handling wheel and tire assembly It is heavy and could cause injury if improperly lifted or if it falls on you 3 Slowly rotate gear shaft 1 counterclockwise one notch 4 Support spare wheel and tire assembly 5 and remove wheel clamp plate 6 to ground 5 Repeat steps 2 and 3 until spare wheel and tire assembly 5 is lowered b Install Stare Wheel and Tire Assembly on Carrier 1 X Secure hoist cable 3 by inserting wheel clamp plate 6 through wheel opening 2
135. rigerant flow through the evaporator coil Thermostatic Heater Switch Condenser Valve Evaporator Coil Compressor Receiver Dryer 1 20 9 2320 303 10 1 22 COLLISION WARNING SYSTEM CWS a The CWS consists of an antenna assembly central processing unit driver display unit side sensor side sensor display and wiring harness b The CWS is a forward and side looking radar system that transmits and receives signals reflected off of objects to the front and side of the tractor c The forward looking antenna assembly determines distance azimuth and approximate speed of vehicle forward of the tractor d The side sensor detects vehicles or objects from two to ten feet moving or stationary alongside the tractor SIDE SENSOR SSS DISPLAY p Tor TT vens DISPLAY UNIT CENTRAL PROCESSING UNIT ANTENNA WIRING HARNESS 1 21 9 2320 303 10 2 OPERATING INSTRUCTIONS Section DESCRIPTION AND USE OF OPERATOR S CONTROLS AND INDICATORS Paragraph Page Number Paragraph Title Number VETERE Instrument 0 002 214441 nennen Steering Wheel and Column Mounted Controls Cab Floor Mounted Controls eese Seal GOnlrols ded bar ise Additional Controls and Indicators
136. rized to you by CTA 50 970 Expendable Durable Except Medical Class V Repair Parts and Heraldic Items or 8 100 Army Medical Department Expendable Durable Items D 2 EXPLANATION OF COLUMNS a Column 1 Item Number This number is assigned to the entry in the listing and is referenced in the narrative instructions to identify the item e g Use dry cleaning solvent Item 16 Appendix D b Column 2 Level This column identifies the lowest level of maintenance that requires the listed item C Operator Crew c Column 3 National Stock Number This is the National Stock Number assigned to the item which you can use to requisition it d Column 4 Item Name Description Commercial and Government Entity Code CAGEC and Part Number This provides the other information you need to identify the item e Column 5 Unit of Measure U MyUnit of Issue U l This column shows the physical measurement or count of an item such as gallon dozen gross etc D 1 9 2320 303 10 Section Il EXPENDABLE AND DURABLE ITEMS LIST 2 3 National Level Stock Number C 1 Item Number 6850 01 441 3218 6850 01 441 3221 6850 00 926 2275 7930 00 282 9699 9140 00 286 5295 9140 00 286 5296 9140 00 286 5297 9140 00 286 5286 9140 00 286 5287 9140 00 286 5288 9140 00 286 5289 9150 01 197 7693 9150 01 197 7688 9150 01 197 7690 9150 01 197 7609 9150 01 197 7692 9150 01 197 7691
137. rpm If operating on hilly terrain in high winds or in other conditions that make it impractical to operate without reserve power operate vehicle in lower gear 2 Driving in City When slowing for posted speed zones remain Drive D position and reduce engine rpm 3 Driving Uphill Under Load Proper use of gears shortens time on hills and minimize amount of shifting As vehicle starts uphill press accelerator pedal as required to maintain speed WARNING DO NOT use engine brake if road surfaces are slippery Use of engine brake on wet icy or snow covered roads could result in loss of vehicle control Failure to follow this warning could result in death or injury to personnel or damage to equipment 4 Use Engine as a Braking Force The vehicle is equipped with an engine braking system that enables the engine to act as a brake The engine brake should be used for descending grades and is most effective between 1750 2100 rpm a If maximum engine braking is required turn both engine brake selection switches up to engage six cylinders b If less than maximum engine braking is required turn left engine brake selection switch up and right engine brake selection switch down to engage two cylinders or left engine brake selection switch down and right engine brake selection switch up to engage four cylinders 5 Downhill Braking a Select a gear that allows engine with engine brake applied to control vehicle speed
138. sion and can cause personnel injury if released e When spring brakes are applied vehicle will stop quickly which could result in injury to personnel Also vehicle cannot be driven again until malfunction is repaired and enough air supply is present for operation of service brakes 2 90 9 2320 303 10 2 32 AND UNCAGE BRAKES Con t WARNING When caging brakes block wheels to keep truck from moving when brakes are released Failure to follow this warning may result in death or injury to personnel or damage to equipment Block wheels Remove nut 4 washer 5 and release stud 2 from stowage pocket 1 Remove cap 3 from spring chamber 6 Insert cross pin end of release stud 2 into opening where cap 3 was Sons removed 5 engage cross pin rotate release stud 2 until cross pin end goes into slot inside of spring chamber 6 Turn release stud right 1 4 turn cross pin is now engaged 6 Install washer 5 and nut 4 on release stud 2 7 Tighten nut 4 until approximately of release stud 2 shows above nut Spring brake is fully released b Uncage Brakes 1 Block wheels 2 Remove nut 4 and washer 5 from release stud 2 3 Turn release stud 2 to left 1 4 turn and remove release stud from spring chamber 6 4 Install 3 in spring chamber 6 5 Insert release stud 2 into stowage pocket 1 and install washer 5 and nut 4 o
139. t is for the operator crew C Lubrication intervals on condition or hard time are based on normal operation Lubricate more during constant use and less during inactive periods Use correct grade of lubricant for seasonal temperature expected For equipment under manufacturer s warranty hard time oil service intervals shall be followed Intervals shall be shortened if lubricants are known to be contaminated or if operation is under adverse conditions e g longer than usual operating hours extended idling periods extreme dust etc WARNING Dry cleaning solvent is toxic and flammable Always wear protective goggles and gloves and use only a well ventilated area Avoid contact with skin eyes and clothes and DO NOT breathe vapors DO NOT use near open flame or excessive heat The solvents flash point is 100 F 138 F 38 C 59 C If you become dizzy while using cleaning solvent immediately get fresh air and medical help If solvent contacts eyes immediately wash your eyes and get medical aid Clean area around lubrication points with dry cleaning solvent Item 16 or equivalent before lubricating equipment After lubrication wipe off excess lubricant to prevent accumulation of foreign matter Dashed leader line indicates lubrication on both sides of vehicle 9 2320 303 10 915 4 LUBRICANT INTERVAL INTERVAL LUBRICANT Primary Fuel Radiator Filter o Check amp Fill C Drain Moisture See N
140. ter MIR HT Indicator Light Beacon Light BCN LT Utility UTLY Light Low Air Pressure Warning Light Left right green light flashes whenever outside turn signal lights are flashing Both lights flash when four way flashers are on Green light comes on when high beam headlights are on Amber light comes on when mirror heater defroster is turned ON Amber light comes on when utility lights are turned on Amber light comes on when beacon warning light is turned on Red light comes on and warning buzzer sounds when air pressure in either section of dual system falls below 65 psi 448 kPa 9 2320 303 10 2 2 INSTRUMENT PANEL Con t f Indicator and Warning Lamps Control or Indicator 42 Parking Brake Indicator Red light comes on when parking broke is activated Light 43 Tractor ABS TRAC ABS Red light comes on when Ignition is turned ON Light Indicator Light goes out after 4 seconds self test if ABS components are working 44 Trailer ABS Indicator Light When trailer ABS electrical cable is connected red light comes on when ignition is turned ON Light goes out after 4 second self test if ABS components are working 9 2320 303 10 2 3 STEERING WHEEL AND COLUMN MOUNTED CONTROLS 2 Control or Indicator 1 Turn Signal Lever Move lever forward for right turn signal rearward for left Headlight Dimmer Switch turn signal and center for off Lift end of turn signal lever to turn
141. to Unit Maintenance Weekly Spare WARNING and Tire Operating truck with an _ underinflated defective tire may lead to tire failure and loss of steering control Damage to equipment or injury to personnel may result Check pressure in tire and adjust as required to achieve 105 psi 724 kPa Check wheel for b Wheel is cracked broken cracks breaks or or bent bends 2 53 9 2320 303 10 Table 2 1 Preventive Maintenance Checks Services PMCS for M915A4 Con t Item To Check Not Fully Mission Interval Service Procedure Capable If 50 Weekly Forward WARNING Rear and Rear Operating truck with an underinflated Rear defective tire may lead to tire failure and loss of Wheels steering control Damage to equipment or and Tires injury to personnel may result a Check pressure in tires and adjust as required Empty 80 psi 552 kPa Loaded 100 psi 690 kPa b Ensure all wheel stud b Two or more wheel studs nuts are tight are missing or lug nuts are using wheel stud lug loose nut wrench and handle Check wheel for c Wheel is cracked broken cracks breaks or or bent bends 51 Weekly Fifth Lubricate fifth wheel in Wheels accordance with VEHICLE 52 Weekly Steering Check front axle steering Any steering component is Compo components for cracks cracked broken or loose nents breaks loose connections or other damage 2 54
142. uel injector pump b The engine fuel system consists of one fuel injector pump one injector per cylinder fuel lines a primary fuel filter and a fuel filter water separator c The engine is governed by fuel injector pump built in governor The system controls idle speed and limits engine maximum speed The driver controls engine speed through the position of the foot pedal assembly d Fuel filters am spin on types The primary fuel filter has a water drain The fuel filter water separator has a hand fuel primer pump and a water drain e Fuel may be drained from the tank through the drain port located on the bottom of the tank f There is an ether quick start system for use in cold weather It is manually controlled via a pushbutton on the instrument panel in the cab INJECTOR FUEL TANK FUEL INJECTOR RETURN TO FUEL FILTER FUEL TANK WATER SEPARATOR INLET FROM FUEL TANK FUEL INJECTOR PRIMARY LEFT FRAME PUMP FUEL FILTER RAIL 9 2320 303 10 1 15 EXHAUST SYSTEM The exhaust system removes exhaust gases from the engine through the exhaust manifold and turbocharger gases flow into exhaust pipes and a muffler to the atmosphere above the cab EXHAUST MANIFOLD TURBOCHARGER MUFFLER EXHAUST PIPES 1 16 COOLING SYSTEM The cooling system consists of one circulating pump a remote mounted coolant filter one 180 F thermostat for controlling fluid flow a transmission oil cooler a
143. uid Lines Look for wear damage and signs of leaks Ensure that clamps and fittings are tight Wet spots indicate leaks but a stain around a fitting or connector can also mean a leak If a leak comes from a loose fitting or connector tighten it If something is broken or worn out report it to your supervisor 7 Fluid Leakage It is necessary for you to know how fluid leakage affects the status of your truck The following are definitions of the types classes of leakage you need to know to be able to determine the status of your truck Learn and be familiar with them and remember when in doubt notify your supervisor CAUTION Operation is allowable with Class and Class leakage WHEN DOUBT NOTIFY YOUR SUPERVISOR When operating with Class or Class leaks check fluid levels more frequently Class Ill leaks must be reported immediately to your supervisor Failure to do this will result in damage to vehicle and or components Leakage Definitions for PMCS Class Leakage indicated by wetness or discoloration but not great enough to form drops Class Il Leakage great enough to form drops but not enough to cause drops to drip from the item being checked inspected Class Ill Leakage great enough to form drops that fall from the item being checked inspected 2 27 9 2320 303 10 Table 2 1 Preventive Maintenance Checks Services PMCS for M915A4 Item To Check Not Fully Mission Interval Service
144. ure Capable If Monthly Radiator Remove dirt and debris from cooling fins Monthly Air Check air conditioner ditioner operation Operate for at least five minutes to help prevent drying and cracking of tubing seals and reduce refrigerant leaks in the system 2 59 9 2320 303 10 This Page Intentionally Left Blank 2 60 9 2320 303 10 Section OPERATION UNDER USUAL CONDITIONS Paragraph Page Number Paragraph Title Number General std ect ahha iet Dude Initial Adjustments Daily Checks and Self Tests 12 SLAM CL Operate Driving TIPS e Shut Down Engine 00000 2 17 Operate Sliding Fifth 2 18 Couple to Uncouple from Pintle Towing Procedures i32 nb Rasen Mud Flap Operate Air Conditioner 2 77 Operate Portable Fire 2 78 iesus
145. ut for better traction e When locking system is engaged driving axles receive equal torque a Maintain steady even movement with transmission in lower gears and interaxle lockout control valve lever in LOCK position Try to keep vehicle rolling without straining engine and powertrain b If vehicle gets stuck reduce tire pressure to gain additional traction Reduce pressure in front tires to 50 psi and pressure in rear tires to 45 psi 302 kPa Inflate tires to normal pressures once vehicle is freed If vehicle bogs down after tire pressure has been reduced place boards brush canvas or similar materials under and in front of tires after shoveling a clear path ahead of each tire This should improve traction d If these efforts fail and it becomes evident that vehicle will not free itself have another vehicle tow stuck vehicle paragraph 2 30 e Whenever operating in sandy or dusty areas you should 1 Make sure each tire has a valve cap 2 Check engine and transmission temperature and engine oil pressure frequently 3 vehicle overheats stop and find out why Service or notify Unit Maintenance as necessary 4 Make sure engine oil filler tube and transmission fluid filler tube are cleaned before dipsticks are removed to check fluid levels Clean accumulations of sand and dirt from around any fluid filler locations before checking or adding fluids 5 Clean spouts of fuel containers and areas around filler
146. with engine rpm at or below 2100 rpm without applying service brakes As downgrade is approached progressively select a gear that when combined with engine brake will allow you to maintain engine speed of 1750 2100 rpm b engine speed exceeds 2100 rpm use one positive application of service brakes to slow engine speed to 1650 rpm release engine brake downshift one gear and apply engine brake Repeat this procedure until engine speed can be maintained at 1750 2100 rpm 2 68 9 2320 303 10 2 14 DRIVING TIPS Con t CAUTION Excessive use of service brake to control downhill speed will result in loss of braking power due to heat build up c If you experience a total loss of braking due to heat build up apply engine brake six cylinders upshift as engine speed approaches 2100 rpm and in Drive D position continue to apply engine brake and maintain directional control of vehicle CAUTION Care must be exercised if tractor or trailer ABS light comes on while driving possibly indicating an ABS malfunction Although the regular normal vehicle system is still fully operational you should continue at a speed no greater than 40 mph 64 kph until the mission is complete When the mission is complete report to Unit Maintenance to clear the ABS fault and restore full ABS capabilities d The anti lock brake system ABS will help in controlling wheel lockup and tire skidding during an emergency d Engage inter

TM 9-2320-303-10 - JATONKAM35s HOME ON THE WEB

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