Installation of Body and Special Equipment
Contents
1. L Crush Block and U Bolt Body Mounting Bracket Left Hand Rail Right Hand Rail 2013 Isuzu Truck Installation of Body and Special Equipment Section continued on next page 2013 Isuzu Truck Installation of Body and Special Equipment Section continued from previous page U Bolt Placement 150 W B Crew Cab Front RHS U bolt on 150 Wheelbase Crew Cab interferes with after treatment system Isuzu will supply body mounting bracket on chassis to facilitate body mounting on the passenger side of the vehicle as Illustrated Crew Cab 150 WB DIMNENISIONS 1o Weld this side only Material ASTM A 36 or equivalent 6 35mm 0 25 inch thick Coating OSHA Yellow powder coating Hardware Isuzu supplied two each 10mm x 30mm hex head bolts 10mm hex nuts Packaging two part numbers PIO Poly Bag 1 bracket 2 10mm x 30mm hex head bolts 2 10mm hex nuts PDC Box 1 bracket 2 10mm x 30mm hex head bolts 2 10mm hex nuts installation instructions All Dimensions in mm REV A Body Mounting Bracket will be painted YELLOW for easy identification 2013 Isuzu Truck PAGE 2 15 1 38 in 35 mm Installation of Body and Specia2. Frame rail 0 ac Reinforcement Plug weld or rivet _ m UNSATISFACTORY a IY Frame rail Fluid Lines Reinforcement Welding is prohibited PAGE 2 21 Do not disturb the layout of any brake lines or fuel lines unless absolutely necessary When modification is needed follow the instructions below carefully to ensure safety Brake fluid lines must not be cut and spliced under any circumstances We do not recommend the cutting or splicing of any fuel lines but if it is absolutely necessary be sure that the correct fitting and tools are used to form the joint and then pressure test the joint Steel lines are metric sizes Preparation of Additional Lines 1 Where possible use only genuine Isuzu lines as supplied by authorized Isuzu dealers 2 Use the correct metric flaring and bending tools to form the lines 3 Avoid repeated bending Do not use heat for flaring and bending the lines Before and after forming the new lines examine them carefully for scratches distortion dents and the presence of any foreign matter 2013 Isuzu Truck Installation of Body and Special Equipment Section continued on next page 2013 Isuzu Truck PAGE 2 22 Installation of Body and Special Equipment Section continued from previous page Installation of Additional Lines Install new lines away from adjacent parts and away from any sources of heat 1 A minimum clearance of 0
3. PAGE 2 1 2013 Isuzu Truck INSTALLATION OF BODY AND SPECIAL EQUIPMENT Clearances Engine At least 1 6 inches of clearance should be maintained around the engine No obstacles should be added in front of the radiator or intercooler 1 6 Inch Clearance Y 1 6 Inch Clearance 1 6 Inch Clearance Front and Back Clearance 1 inch Engine NRRL AN Transmission The transmission is removed from the rear Enough clearance must be provided to allow rearward movement of the transmission assembly Clearance should be sufficient to allow 5 to 6 inches of unrestricted movement of the transmission assembly In addition provide at least 2 inches of clearance around the control lever on the side of the transmission to allow free movement without any binding 5 6 Inch ie Clearance Front and Back Clearance 1 inch Transmission 2013 Isuzu Truck Installation of Body and Special Equipment Section continued on next page 2013 Isuzu Truck Installation of Body and Special Equipment Section continued from next page At least 6 inches of clearance should be maintained above the transmission to allow easy removal of the upper cover for manual transmissions At least 2 inches of clearance should be maintained above the automatic transmission to allow for transmission removal 7 LLL GAL AIA a2 Inches or More M T a ee 150 We B 2 0 Inches
4. area the area of the body and the area of the cab chassis that does not overlap with the body The body frontal area is the outside height of the body multiplied by the outside width of the body The Cab Chassis Non Overlap Area in square feet is dependant on the size of the body and how high it is mounted above the top of the frame rail Use the Table 1 below to determine the Non Overlap Area 2013 Isuzu Truck Completed Vehicle Frontal Area ft equal to or less than IVD max TABLE 1 Cab Chassis Non Overlap Area ft M o ee a Between the bottom of ee and the we of Frame Rail in inches Body With 4 25 4 5 e fefefe we a wo no we fas wo we ws wel wo aor fis ee ra wa oa ve fi e fine no we ne e oer fie eer wr oa wa fem ia wx wr ma EXAMPLE 90 Outside Width 85 6 Outside Height 79 Inside Height body mounted on 4 Long Sills with 2 5 of mounting wood Body mounting height is 6 5 4 Long Sill 2 5 Wood Body frontal area is 90 x 85 6 144 53 5 ft Non Overlap Area from Table 1 19 0 ft Total completed vehicle frontal area is 53 5 ft 19 0 ft 72 5 ft below limit Installation of Body and Special Equipment Section continued on next page PAGE 2 9 2013 Isuzu Truck Installation of Body and Special Equipment Section continued from previous page Mirrors The Isuzu NPR series chassis will accommodate up to 96 inch wide bodies wi
5. chassis frame with bolts Do not weld 7 Repaint exposed metal after drilling 2013 Isuzu Truck Installation of Body and Special Equipment Section continued on next page 2013 Isuzu Truck Installation of Body and Special Equipment Section continued from previous page PAGE 2 20 Dimensions A no more than 0 59 inches in diameter B must be more than H 5 for welding and H 7 for holes C must be more than 1 57 inches H Frame Height Reinforcement of Chassis Frame Reinforcements must be installed to prevent the considerable variation in the section modulus They must be welded so as to avoid localized stresses The frame of the N Series is made of SAPH440 mild steel The drawing on the following page illustrates correct and incorrect methods of frame reinforcement Welding 1 Keep reinforcement plates and chassis frame free from moisture and water 2 Avoid cooling with water after welding 3 Use a suitable means to protect pipes wires rubber parts leaf springs etc against heat and effect of sputtering 4 Remove fuel tank assembly when welding portions near the fuel tank 5 Remove coat of paint completely when welding painted areas Repaint exposed metal after welding 2013 Isuzu Truck Installation of Body and Special Equipment Section continued on next page 2013 Isuzu Truck Installation of Body and Special Equipment Section continued from previous page SATISFACTORY
6. exhaust pipe s end area 100mm from vehicle end or side More than More than Less than 200mm 450mm 45deg 2013 Isuzu Truck Installation of Body and Special Equipment Section continued on next page PAGE 2013 Isuzu Truck Installation of Body and Special Equipment Section continued from previous page 2 7 Rear Wheel Axle The design and installation of the body should allow sufficient clearance for full vertical movement of the rear wheels and axle when the vehicle travels over rough or unlevel surfaces Rear of Body __ z See Note Normal Rear Axle Center Line D Rear Wheels Rear Wheels Over High Spot Over Obstacle Note For recommended clearances please refer to the Rear Axle Chart in each model s respective section Other Clearances The transmission control cable may be broken if it is bent by or interferes with the body and its fixtures To prevent this 1 inch of minimum clearance should be provided When cable is detached from body mounting be sure not to bend the cable Accessibility to the grease nipple on the rear spring bracket shackle should be provided so that serviceability with a grease gun is not hampered Parts Minimum Clearance Location Brake Hose 6 7 in Axle Side 1 6 in Frame Side Parking Brake Cable 1 2 in Fuel Hose 1 6 in Shock Absorber 2 4 in Axle Side 1 2 in Frame Si
7. shown in the table below ENGINE GAS DIESEL MODEL NPR NPR HD NPR NPR HD NQR NRR Propeller Shaft Diameter in 3 54 3 54 3 18 3 54 3 54 3 54 Maximum Propeller Shaft Length in 52 9 52 9 43 52 9 52 9 52 9 b Propeller Shaft Angles The maximum propeller shaft angles with respect to the previous shaft are shown in the table below ENGINE GAS DIESEL MODEL NPR NPR HD NPR NPR HD NQR NRR Maximum Propeller Shaft Angle 6 1 6 1 6 1 6 1 6 1 61 c The propeller shaft angles must be designed such that the angles will cancel to avoid propeller shaft whip d The propeller shaft yokes must be assembled such that the propeller shaft yokes are in phase In phase means that the yokes at either end of a given propeller shaft assembly are in the same plane 10 Extending the frame will also require relocation and or addition of crossmembers If the extension is within the limits of the optional wheelbases of the respective model the exact crossmember locations and dimensions are given in the respective model sections of this book If the modified wheelbase exceeds the optional wheelbases of the respective model the following guidelines must be adhered to a The crossmember location will largely be determined by the propeller shaft lengths and where the center carrier bearing locations are for the propeller shaft assembly b Acrossmember must be located at the front
8. 4 F 2013 Isuzu Truck Installation of Body and Special Equipment Section continued on next page 2013 Isuzu Truck PAGE 2 26 Installation of Body and Special Equipment Section continued from previous page Electrical System Modifications Modifications add on wiring must be carefully reviewed to ensure compatibility with the base vehicle wiring by reviewing system schematics wire routing paths harness connections etc Due to the wide range of modifications that may be required for vocational needs it is not feasible for the O E M to take into account all potential revisions For this reason any person modifying existing vehicle wiring must assume responsibility that the revisions have not degraded the electrical system performance Any add on wiring needs to be properly fused and routed to prevent cut pinch and chafe problems as well as avoid exposure to excessive heat Care must be exercised that existing vehicle interfaces do not have their current load capabilities exceeded and that the respective control devices are not overloaded Added wire size should be at least as large as the wire to which it is attaching in order for fuse protection to be maintained A Packard electric wiring repair kit is available through Kent Moore P N J38125 B Phone 1 800 345 2233 This kit contains instructions tools and components for making repairs to wiring harness components This kit would also greatly assist in accompli
9. 4 inches must be maintained between lines Where necessary clip the lines into position in order to maintain this minimum clearance 2 Minimize any crossing between lines If a crossing is unavoidable use the following procedure a At least 0 4 inches of clearance should be maintained between lines at the crossing point b If the 0 4 inches of clearance cannot be maintained or if the lines are subject to vibration clip them securely 3 Plan the bends and clipping points of the lines to minimize vibration and the resulting fatigue 4 Use rust proofed clips and apply vinyl coating to the portions of the lines to be clipped 5 Install new lines in positions where they are protected against water dirt grit sand rocks and other foreign matter that can come from above or below or can be flung up by the wheels Clip 0 4 in or more Electrical Wiring and Harnessing To increase the reliability of the wiring all frame harnesses are covered with corrugated vinyl tubing The following instructions apply to extending or modifying these harnesses See the Electrical Section for information on commonly used circuits in the NPR NPR HD NQR NRR 2013 Isuzu Truck Installation of Body and Special Equipment Section continued on next page 2013 Isuzu Truck PAGE 2 23 Installation of Body and Special Equipment Section continued from previous page Wiring 1 Most wiring connections on Isuzu vehicles are made wit
10. ILOCK BRAKES Working on Chassis frame The chassis frame is designed and built with consideration for proper load distribution Sufficient physical strength is provided when the load is evenly distributed Installation of special equipment on the chassis frame can cause variations in load distribution If even distribution of load is not kept in mind when the equipment is installed localization of stresses on specific areas of the frame could cause cracking of the chassis frame members or other problems even if the total weight of the equipment is within the design limit The chassis frame is designed as an integral unit Therefore we do not recommend cutting the chassis frame under any circumstances Drilling and Welding IMPORTANT NOTE For vehicles equipped with electronic engines and or electronic or hydra matic transmissions electric arc welding must be done with the negative battery cable disconnected Do not drill or weld in the shaded portions of the chassis frame members Do not weld within 0 8 inches from the edges of any existing holes N Hold the length of any welding beads within 1 2 2 0 inches Allow at least 1 6 inches between adjacent welding beads All holes must be drilled Do not use a torch to make any holes gt a 0O All riveting must be done with cold rivets Do not use hot rivets oO The flange of the chassis frame must not be cut under any circumstances 6 The subframe must be attached to the
11. and rear spring hangers of the rear suspension refer to the appropriate section of this book to see where these suspension crossmembers are to be located c The crossmember must be constructed such that it supports both the upper and lower flange on each frame rail see drawing on next page A crossmember such as the one on the next page may be constructed or Isuzu crossmembers may be obtained from your Isuzu parts dealer 2013 Isuzu Truck Installation of Body and Special Equipment Section continued on next page PAGE 2 33 2013 Isuzu Truck Installation of Body and Special Equipment Section continued from previous page Additional crossmember Frame rails d The maximum distance between crossmembers for the respective models is given in the table below ENGINE DIESEL MODEL NOR Maximum Distance Between Crossmembers in e The drilling for any additional holes in the frame rails must comply with the DRILLING AND WELDING section of this book 11 All other aspects of lengthening or shortening the wheelbase must comply with the applicable section of this Body Builder s Guide For special applications and longer than recommended body lengths ICTA Application Engineering must be consulted for approval In the West Coast call 1 714 935 9327 and in the East Coast call 1 770 740 1620 x262 12 Please contact applications engineering for guidelines on N SERIES CHASSIS frame modifications whe
12. ase in the correct length AL The insert must have the same cross sectional dimensions and yield strength as the original frame rail 3 Divide the new CA by two 2 Measure new CA 2 from the center of the rear axle forward and mark this point on the chassis frame See figure below Cut Point 1 2 New CA 4 Cut the chassis frame at this point If the wheelbase is to be lengthened addition of the previously obtained insert of length AL determined in step 1 will be made at this time If the wheelbase is to be shortened measure the distance SL forward of this cut and remove a length SL section from the chassis frame see figure below Insure that an adequate area on the frame remains for the required addition of the necessary reinforcements These are the only suggested places for cutting the frame and reinforcements but may be changed upon the advice of Isuzu Commercial Trucks of America Inc Application Engineering y Second Cut Point Section to be Added Section to be Removed r Cut Point i ee J Cut Point j i J a G 1 2 New CA _ SL 1 2 New CA Lengthening the Wheelbase Shortening the Wheelbase 2013 Isuzu Truck Installation of Body and Special Equipment Section continued on next page PAGE 2013 Isuzu Truck Installation of Body and Special Equipment Section continued from previous page 2 30 5 Whe
13. ce should be maintained between harness and pipe lines Taping When parallel 0 4 in or more a When across 0 8 in or more SATISFACTORY an UNSATISFACTORY 2013 Isuzu Truck Installation of Body and Special Equipment Section continued on next page PAGE 2 25 2013 Isuzu Truck Installation of Body and Special Equipment Section continued from previous page Wire Color Code The electrical circuits of the N Series Chassis Cab are connected with low voltage stranded wire for automotive applications The color coding standards are as follows for the N Series Chassis Cab 1 Black B Starter circuits and grounds 5 Yellow Y Instrument circuit 2 White W Generator alternator circuit 6 Brown Br Accessory circuit 3 Red R Lighting circuit 7 Light Green Lg Other circuit 4 Green G Signal circuit 8 Blue L Windshield wiper motor circuit Maximum Allowable Current Harness Design Diameter mm AWG Equivalent No of Wires Wire Diameter mm Cross Sectional Area mm2 Maximum Allowable Current Amps wo T o o a T o S o e o o S oo S a S o o o oo S a O SS o r o o w o a S a O ooa o o oo o e T 0 oo o oo oa o oo o o S S e T o T s S o T SSS o e T e o o S a O o i088 88 i Reference The values given in the maximum allowable current column are based on the ambient temperature condition of 104 F with temperature increase of 10
14. de 2013 Isuzu Truck Installation of Body and Special Equipment Section continued on next page 2013 Isuzu Truck PAGE 2 8 Installation of Body and Special Equipment Section continued from previous page Body Installation To maintain the performance of the truck chassis either a side member or subframe should always be used for body mounting Body mounting with low rigidity will Chassis often adversely affect riding comfort NPR ECO MAX Complete Vehicle Frontal Area Calculation CAB Chassis Frontal Area Non Overlap Area with Rear Body I lt W Body Outside Width gt ta D oO i a oO 8 5 O gt se fo a M Mount Height H Completed Vehicle Frontal Area Calculation The method used to certify EPA 10 emissions compliance of the NPR ECO MAX has completed vehicle frontal area and curb weight restrictions The Completed Vehicle Manufacturer is responsible for ensuring that the completed vehicle meets these limits so as to ensure emissions compilance For reference the frontal area limit is 74 5 ft and the curb weight limit is 9 660 Ibs Caution Always consult the Incomplete Vehicle Document for the most up to date information regarding completed vehicle requirements A copy of the IVD is also avail able in the Isuzu Body Buidlers Guide Calculating the frontal area of the completed vehicle is easy There are two compo nents of the completed vehicle frontal
15. ent Sub frame Design and Mounting The sub frame assembly should be mounted as close to the cab as possible It should be contoured to match the shape and dimensions of the chassis frame as closely as possible NPR ECO MAX NPR HD NQR NRR 2013 Isuzu Truck Installation of Body and Special Equipment Section continued on next page PAGE 2 12 2013 Isuzu Truck Installation of Body and Special Equipment Section continued from previous page Subframe Contour Contouring of the front end of the subframe members as shown in the three illustrations below will prevent stresses from being concentrated on certain areas of the chassis frame Wooden subframe 2013 Isuzu Truck Installation of Body and Special Equipment Section continued on next page PAGE 2 13 2013 Isuzu Truck Installation of Body and Special Equipment Section continued from previous page When using a steel subframe do not close the end of the subframe Steel subframe Chassis frame Prohibited Attachment Areas Do not attach the sub frame with a bolt or bracket to the chassis frame at the points indicated in the following illustrations 1 At the front end of the subframe The attaching bolt or bracket must be at least 2 inches behind the kick up point of the subframe Kick up point of subframe Do not at
16. h cases It should be noted that these methods of reinforcements and any other methods which may be used require a 45 angled cut at both ends to avoid stress concentrations in the frame note the figures under item 7 2013 Isuzu Truck Installation of Body and Special Equipment Section continued on next page PAGE 2013 Isuzu Truck Installation of Body and Special Equipment Section continued from previous page 2 31 PUFZZZ7Z777 77777777777 Snug fit inner channel Snug fit inner channel with Inverted L for Long Bridge wheelbases 7 The reinforcements must be fastened securely to only the web of the original chassis frame rail The reinforcement must be held rigidly in place using either HUC bolts GRADE 8 bolts and hardened steel washers at both the bolt head and nut or GRADE 8 flanged bolts and hardened steel washers at the nut Below are some suggested bolt patterns It should be noted that these bolt patterns must not align the bolts vertically i e the bolt pattern must be staggered 8 Lengthening the frame will also require extending the brake lines basic chassis electrical harness It is recommended that the original brake lines be removed and replaced with brake lines of the same diameter as the original lines and of the appropriate length The extended ABS brake lines must be supported back to the frame to prevent vibration The elect
17. h terminals We recommend the use of terminals when splicing cables and wires 2 When splicing use new wire of the same gauge and do not make splices inside the corrugated tubing 3 When making connections to the end of the harness make sure the connections are electrically perfect Use insulating tape as needed to prevent the entry of water which results in short circuits and or corrosion 4 When making new circuits or modifying circuits already installed make the cables only just taut enough to remove any slack Use clips or grommets where required to protect cables from heat or sharp edges When cables must run near the exhaust system see the instructions in the Exhaust System section 5 Always use rustproof clips and apply vinyl coating to that portion of the clips in direct contact with the harnesses No scotch clips or connectors 6 To minimize the vibration of the harness clipping points should be set up according to the table Harness Diameter Clip Distance less than 0 2 in less than 11 8 in 0 2 in 0 4 in approx 15 7 in 0 4 in 0 8 in approx 19 7 in 7 When changing the length of the battery cable do not cut or splice the existing cable Make up a new cable of the correct length and wire gauge for the load and distance without splices 8 When using connectors use a socket female connector on the electrical source side and a plug male connector on the electrical load side to lowe
18. he frame has an 80 40mm modular hole spacing standard This standard pattern will assist with body mounting Depending on model wheelbase and chassis specification some holes are in use and some holes are intentionally missing Subject to change without notice 1 299 INPR ONLY 1 260 1 299 INPR ONLY 260 we Nm Note Re tighten all attaching parts that are loosened during body installation 2013 Isuzu Truck Installation of Body and Special Equipment Section continued on next page 2013 Isuzu Truck Installation of Body and Special Equipment Section continued from previous page PAGE 2 18 U bolt Installation When U bolts are used to retain the subframe reinforcement blocks must be installed in the frame members This will prevent distortion of the frame flange as they are tightened The drawing indicates the correct placement of reinforcement blocks If you use wood blocks be sure that there is sufficient clearance between them and any parts of the exhaust system The use of J bolts to retain the subframe is strictly prohibited If any fluid lines or electric cables are located near the reinforcement blocks you must provide at least 0 4 inches of clearance between rigid or stationary portions and at least 1 6 inches between moveable or flexible portions of the lines CAUTION Fluid line U Bolt placement is critical with new emission systems 0 4 in or more a
19. ions or emissions system durability This shield can be removed or modified in order to facilitate body or equipment mounting but the completed vehicle manufacturer should ensure that when completed the exhaust will be adequately shielded to prevent unintentional contact with hot exhaust components and that heat transfer to body components is not so high as to present safety or durability risks Detailed information on removal of the heat shield can be found in the Isuzu service manual available on line at www isuzutruckservice com 2013 Isuzu Truck Installation of Body and Special Equipment Section continued on next page 2013 Isuzu Truck PAGE 2 10 Installation of Body and Special Equipment Section continued from previous page DPF SCR Heat Shield Removal m L gt I ra C 2013 Isuzu Truck Installation of Body and Special Equipment Section continued on next page PAGE 2 11 2013 Isuzu Truck Installation of Body and Special Equipment Section continued from previous page Special Equipment on the Chassis When installing special equipment on the chassis extra consideration must be given to the weight and construction of the equipment to assure proper distribu tion of the load Localization of the load should be prevented All special equipment should be properly secured into position We recommend the use of sub frame members when installing special equipm
20. ke hoses 7 8 in or more The temperature of flexible brake hoses should not exceed 158 F If the highest temperature is not measur able a clearance of more than 15 7 in should be maintained between the hoses and the exhaust system Wiring harnesses and cables 7 8 in or more The temperature of flexible brake hoses should not exceed 158 F If the highest temperature is not measureable a clearance of more than 15 7 in should be maintained between the hoses and the exhaust system Steel fuel lines 3 1 in or more Rubber or vinyl fuel hoses 5 9 in or more 2013 Isuzu Truck Installation of Body and Special Equipment Section continued on next page PAGE 2 27 2013 Isuzu Truck Installation of Body and Special Equipment Section continued from previous page 2 Ifa tool box is installed it should preferably be made from steel If a wooden tool box is installed at least 7 8 inches of clearance should be maintained between the tool box and any parts of the exhaust system 3 If the exhaust system is modified it is the responsibility of those making the modification to ensure that the noise level meets appropriate standards 4 Ifthe exhaust system is modified it is the responsibility of those making the modification to ensure that the emission levels meet appropriate standards Fuel System Relocation of the fuel tank or installation of additional fuel tanks is not recommended If modificatio
21. l Equipment Section continued on next page 2013 Isuzu Truck Installation of Body and Special Equipment Section continued from previous page PAGE 2 16 Subframe Mountin 8in Bin 8in 8in m Se ee ii E i Di E h d CS Do not attach in these areas Within 8 inches of bends in the chassis frame or the attachment points of any crossmembers Bracket Installation Mounting brackets should be clamped to the chassis frame using bolts For proper positions in which to install the bolts refer to the preceding section and the section Modifications to the Chassis Frame In addition to the illustrated bracket and U bolts a shear plate may be required for adequatley body mounting The body company will be responsible for engineering their own mounting system Bolster The frame material is a heat treated carbon manganese low alloy steel with good weldability The frame has a 80 40 mm modular hole spacing standard This standard pattern will assist in body mounting Cushioning material va Chassis frame 2013 Isuzu Truck Installation of Body and Special Equipment Section continued on next page PAGE 2 17 2013 Isuzu Truck Installation of Body and Special Equipment Section continued from previous page MODULAR FRAME HOLE PATTERN The fame material is a heat treated carbon manganese and low alloy steel with good welding characteristics T
22. n the vehicle is equipped with an Antilock Brake System 2013 Isuzu Truck Installation of Body and Special Equipment Section continued on next page
23. n welding the insert length AL for wheelbase lengthening to the original frame rail a continuous butt weld must be used at the splices When shortening the wheelbase weld the ends of the chassis frame together with a continuous butt weld over the junction of the frame ends Weld both the inside and outside of the frame rails using welding techniques prescribed by established welding standards ref SAE J1147 and in accordance with this guide An example of this weld is shown below SSO 1 0 in or more BUTT WELD 100 Weld can be inside or outside of member or as shown a combination of both os So oe X SSSSSS 1 0 in or more 6 Determine the appropriate additional internal reinforcements which are required using this equation Reinforcement Length AL 6 x original frame rail web depth The figure below shows how this reinforcement is to be placed over the extended or shortened section of the frame rail 3xD wiles 3xD 6xD i Lengthened Wheelbase Shortened Wheelbase D Original frame rail web depth The suggested cross section of this reinforcement is a snug fit inner channel If the new wheelbase exceeds the upper limit of the optional wheelbases of this model i e a long bridge it may be necessary to use an inverted L reinforcement in addition to the snug fit channel reinforcement see figures on next page Application Engineering should be consulted for approval of suc
24. nd controls Extra care must be taken when Chassis frame placing bodies on chassis so as not to damage these components 1 6 in or more Flexible portion Reinforcement block Reinforcement blocks should be mounted securely in installed position For the installation positions of the U bolts refer to Prohibited Attachment Areas Crew Cab Body Frame Requirements The Crew Cab NPRHD and NQR will be available in two wheelbases 150 and 176 inches CA will be 88 5 and 114 5 inches On this model chassis Isuzu Commercial Trucks of America Inc ICTA will require that the body installed on the chassis have an understructure manufactured with any of the following structural steel C channels 4 x 1 5 8 7 5 Ib ft 5 x 1 3 4 6 7 or 9 0 Ib ft 6 x 2 8 2 10 5 or 13 Ib ft 2013 Isuzu Truck Installation of Body and Special Equipment Section continued on next page PAGE 2013 Isuzu Truck 2 19 Installation of Body and Special Equipment Section continued from previous page Modification of the Frame Modifications of the chassis frame should be held to an absolute minimum Modification work should be performed according to the instructions in the following paragraphs When modification is complete chassis frame members should be carefully inspected to eliminate the possibility of any safety related defects NOTE PLEASE REFER TO NOTES ON CHASSIS FRAME MODIFICATION WITH ANT
25. ns to the fuel system are unavoidable follow these recommendations 1 Maintain adequate clearance between the fuel tank and any other device or structure 2 Do not connect any additional fuel hose Rear Lighting Brackets installed are temporary Please do not use these brackets for body installation No matter what other modifications or changes are made access to components requiring daily preventive maintenance or other routine service must not be obstructed This includes 1 Inspection filling and draining of engine oil and cooling water 2 Inspection filling and draining of transmission fluid 3 Adjustment removal and installation of the fan belts 4 Inspection filling and removal of the battery and battery cover 5 Inspection and filling of brake fluid 6 Inspection and bleeding of the brake system and servo unit 7 Maintenance of clearance for tightening of check bolt on brake safety cylinder 8 Operation of the spare tire carrier including mounting and dismounting of the spare tire 9 Adjustment removal and installation of distributor and or cover 2013 Isuzu Truck Installation of Body and Special Equipment Section continued on next page 2013 Isuzu Truck PAGE 2 28 Installation of Body and Special Equipment Section continued from previous page Wheelbase Alteration With certain applications it may become necessary to alter the wheelbase of the chassis The next two sections pr
26. or More A T spo Transmission Front and Center Propeller Shafts At least 1 25 inches of clearance should be maintained around front and center propeller shafts 1 25 Inches or more 1 25 Inches or more Front Propeller Shaft PAGE 2 2 2013 Isuzu Truck Installation of Body and Special Equipment Section continued on next page 2013 Isuzu Truck Installation of Body and Special Equipment Section continued from previous page PAGE 2 3 Rear Propeller Shaft With the rear springs at maximum deflection at least 1 25 inches of clearance should be provided over the rear propeller shaft 1 25 Inches or more J gL AAAS Front Propeller Shaft 2013 Isuzu Truck Exhaust System Section continued on next page PAGE 2 4 2013 Isuzu Truck Installation of Body and Special Equipment Section continued from previous page Exhaust System The exhaust system has a crucial role in meeting 2010 EPA regulations In order to maintain compliance with the 2010 EPA emissions levels the Diesel Particulate Filter DPF and SCR package must not be moved The distance between the engine exhaust manifold down pipe and Diesel Particulate Filter DPF Selective Catalyitic Reduction Package SCR must be maintained and the pressure in the system must be sustained at a constant level Due to increased temperatures in the exhaus
27. ovide the suggested guidelines for accomplishing either shortening or lengthening of the wheelbase Shortening Lengthening the Wheelbase Without Altering the Frame Since the frame is an integral part of the chassis it is recommended that the frame not be cut if it is possible to avoid it When shortening lengthening the wheelbase on some models it is possible to do so without cutting the frame This is possible on models which have a straight frame rail If the chas sis does not have a straight frame rail it may still be necessary to cut the frame For instructions on shortening lengthening these chassis refer to the Altering the Wheelbase by Altering the Frame section of this book Otherwise the wheelbase may be shortened lengthened by removing the rear suspension drilling new suspension mounting holes at the appropriate spot in the frame and sliding the rear suspension suspension liner and suspension crossmembers forward or aft The suspension and suspension crossmembers rivet holes left in the frame rail flange must be filled with GRADE 8 bolts and hardened steel washers at both the bolt head and nut HUC bolts or GRADE 8 flanged bolts and hardened steel washers at the nut When shortening lengthening the wheelbase in this manner the following guidelines must be adhered to 1 All frame drilling must comply with the DRILLING AND WELDING section of this book 2 All rivet holes left in the frame rail flange from the suspension and
28. pump or line is located above the exhaust pipe muffler or catalytic converter Tool Box Oil Pump C a Heat Shield Ss 3 9 Inch Clearance 3 9 Inch c Clerance S Lal 3 9 Inch e Clearance Exhaust Pipe AL Muffler 1 Clearances around SCR system components must be greater than 25mm at all times to avoid potential contact between the body and the exhaust compo nents The 25mm allows for thermal expansion and assembly tolerance of the exhaust system It does not account for dynamic movement in the body due to road conditions and other loads Body companies are instructed to adjust this 25mm clearance as required to account for body displacement while driving This guidance does not supercede guidance or exhaust clearances for temperature sensitive or flameable components 2 Exhaust temperatures have not changed since the introduction of DPF in 2007 2013 Isuzu Truck Installation of Body and Special Equipment Section continued on next page 2013 Isuzu Truck PAGE 2 6 Installation of Body and Special Equipment Section continued from previous page Exhaust system surface temperatures During Manual Regeneration N Series Modification Guideline heat issue EXHAUST PIPE HEAT During the DPF regeneration cycle exhaust gas temperatures are hot Therefore care should be exercised in placement of the pipe s end location and angle Do not locate any body parts around the
29. r the possibility of a short circuit when disconnected 9 When connecting cables to moving or vibrating parts such as the engine or transmission be sure to maintain sufficient slack in the wiring to absorb the vibration Follow the example of existing cables connected by Isuzu Keep flexible cables clear of other parts 10 Do not use vinyl tape in the engine compartment The heat will tend to make it peel off Use plated steel clips coated with rubber or vinyl 11 When locating auxillary equipment or lines near the ECM caution should be used in order to protect the ECM from excessive vibration heat or chemical reactions 2013 Isuzu Truck Installation of Body and Special Equipment Section continued on next page 2 24 2013 Isuzu Truck Installation of Body and Special Equipment Section continued from previous page PAGE Vinyl tube J a Direct contact oe N N i f SATISFACTORY UNSATISFACTORY Rubber grommet Steel plate Electric wire SATISFACTORY UNSATISFACTORY Cables should not be in contact with sharp edges or pierced holes pe Harness Harness The harness receives the adverse affect of d dirt grit or water SATISFACTORY UNSATISFACTORY Harnesses should not be installed on inside lower face of the chassis frame Harnesses should not be taped to fuel lines or other lines A sufficient clearan
30. rical harness must be extended in accordance with the ELECTRICAL WIRING AND HARNESSING section of this book ICTA offers an electrical extension harnesses for the N Series chassis when a wheelbase is lengthened One wheelbase longer is the recommended maximum wheelbase extension please refer to the drive line section and particular models for number of drivelines and their maximum lengths The extension of a wheelbase will require an extension harnesses pn 8980626380 and 12 clips 6097003230 Part numbers 2008 2009 201 0 201 1 2012 harness extension harness 2008 2012 NPR NPR HD NQR NRR PN 8980626380 CHAS WRG HARNESS ASM QTY 1 2008 2012 NPR NPR HD NQR NRR PN 5097003230 CHAS RR WRG HARNCLIP QTY 5 9 The propeller shafts overall length will also need to be lengthened or shortened If the extension is within the limits of the optional wheelbases of the respective model the exact propeller shaft lengths and angles are given on or about Page 12 of the respective sections of this book If the modified wheelbase exceeds the optional wheelbases of the respective model the following guidelines must be adhered to 2013 Isuzu Truck Installation of Body and Special Equipment Section continued on next page PAGE 2013 Isuzu Truck Installation of Body and Special Equipment Section continued from previous page 2 32 a Propeller Shaft Length The maximum propeller shaft lengths pin to pin for the respective models are
31. shing necessary add on wiring such as body marker lamps so that system reliability durability is maintained Electrical wiring components can be obtained through your authorized Isuzu dealers Packard Electric components are also available through Power and Signal www powerandsignal com Power and Signal may also be able to assist in making necessary wiring additions by providing custom wiring stubs or jumpers to your specifications Caution Before servicing any electrical component the ignition key must be in the LOCK position and all electrical loads must be OFF unless instructed otherwise in Isuzu service procedures If a tool or equipment could easily come in contact with a live exposed electrical terminal also disconnect the negative battery cable Failure to follow these precautions may cause personal injury and or damage to the vehicle or its components Exhaust System Modification of the exhaust system should be avoided If modifications are absolutely necessary the following points should be maintained 1 Maintain the clearance specified in the Exhaust System table between all parts of the exhaust system and any fuel lines brake lines brake hoses electrical cables etc The exhaust outlet should not point toward any of these parts Clearance Brake lines 2 4 in or more If the combined section of a group of parallel brake lines is more than 7 8 in a clearance of 7 in or more should be provided Flexible bra
32. suspension crossmembers must be either filled with GRADE 8 bolts and hardened steel washers at both the bolt head and nut HUC bolts or GRADE 8 flanged bolts and hardened steel washers at the nut 3 The components required to be slid forward or aft are the suspension and suspension hangers suspension crossmembers and suspension frame liner Altering the Wheelbase by Altering the Frame Even on a straight frame rail it may be desirable to cut the frame and lengthen or shorten the wheelbase rather than simply sliding the rear suspension back or forward The following section offers some guidelines and suggestions for cutting and lengthening or shortening the frame Glossary of Terms Chassis Wheelbase Alteration CA Length from back of cab to rear axle centerline in inches AL Added length in case of a lengthened wheelbase Difference between WB new and WB old SL Shortened length in case of shortened wheelbase Difference between WB old and WB new 2013 Isuzu Truck Installation of Body and Special Equipment Section continued on next page PAGE 2013 Isuzu Truck Installation of Body and Special Equipment Section continued from previous page 2 29 1 Determine the added length AL or shortened length SL required to lengthen or shorten chassis For added wheelbase New CA CA AL For shortened wheelbase New CA CA SL 2 Obtain the material to be used as the insert for the lengthened wheelb
33. t system during the regeneration cycle and the heat stress caused by these temperatures body builders should closely evaluate the placement of equipment and provide protection to these added components as needed Diesel Particulate Filter and Selective Catalytic Reduction SCR Restrictions The DPF SCR has exhaust pressure pipes and temperature sensors Care must be taken when a body is installed so as to not damage pipe sensors The DPF SCR should be free from impact or vibration during body installation The DPF SCR must have enough room for disassembly of the unit for service and cleaning The DPF SCR switch in the cab should not be removed or disabled No modification or relocation of the DPF SCR unit pressure pipes and sensor is permitted No Modification Zones The DPF SCR unit CAN NOT be modified or moved The DEF tank and pump CAN NOT be modified or removed DEF lines and coolant lines CAN NOT be modified or rerouted 2013 Isuzu Truck Installation of Body and Special Equipment Section continued on next page 2013 Isuzu Truck PAGE 2 5 Installation of Body and Special Equipment Section continued from previous page EXHAUST CLEARANCES If flammable materials such as wood are used in the body provide at least 3 9 inches of clearance between the body and any parts of the exhaust pipe DPF SCR Package If it is impossible to maintain the minimum clearance use a heat shield Also use a heat shield if an oil
34. tach in this area 2013 Isuzu Truck Installation of Body and Special Equipment Section continued on next page 2013 Isuzu Truck PAGE 2 14 Installation of Body and Special Equipment Section continued from previous page 2 Front U bolt and Mounting Bracket Mounting Locations Ahead of Transmission Mandatory location due to after treatment device location and interior frame components The chassis will be supplied with one steel crush block in cab for left hand forward body attaching location as illustrated in the drawings below and one one body mounting bracket YELLOW attached to the right hand frame rail in the location shown in the drawings below Body Builder will be required to design a mating bracket for attaching the body to the yellow chassis body mounting bracket Ref page 2 16 for illustration of bolt clamping 2 brackets No U bolt type attaching allowed NPR ECO MAX NPR HD NQR NRR Body Mounting Bracket Location Body Mounting Bracket Location Crush Block Crush Block p Location Location
35. thout modification to the mirror brackets The Isuzu NPR HD NQR and NRR chassis will accommodate up to 96 inch wide bodies without modification to the mirror brackets Bodies from 97 to 102 inches wide will require that the mirror brackets be modified This Modification can be made at the port and the vehicle order label will indicate a Regular Product Option of IU3 indicating Mirror Bracket for 102 wide body The brackets can also be modified by the N Series Dealer or the Body Company by installing mirror brackets ordered from Isuzu Parts Side Step Door Installation recommendations Floor of body should be at least 10 above frame rail 2 5 wood 4 long sill 3 cross sill 1 125 floor Forward end plate of step well area can interfere with SCR system All body components should maintain a minimum 1 0 of clearance to exhaust components UNDER ALL DYNAMIC CONDITIONS Body company will need to add to this 1 0 clearance to account for flex or movement in the body Outer heat shield on SCR system can be removed prior to mounting body if required for clearance Care should be taken to adequately shield exhaust Driver s side steps can also be accommodated if door is located behind DEF tank Battery may have to be relocated depending on door location Access hatch for DEF tank fill may have to be added depending on door location DPF SCR Heat shield Removal The exhaust external heat shield does not impact vehicle emiss
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