Home

CHRYSLER AIR CONDITIONING SYSTEM

1. nd MM ARAS Fig 2 Evaporator Installed CHRYSLER SERVICE MANUAL AIR CONDITIONING 633 24 4 PROTECTIVE C Fig 3 Discharge Service Valve with both the suction and discharge ports in the one valve plate The valve plate is located be tween the cylinder head and the cylinder block 9 CRANKSHAFT The crankshaft is a forged steel counter balanced shaft utilizing integral cams for the connecting rod throws The shaft is mounted in ball bearings at both ends and is belt driven through pulleys and a magnetic clutch Counter weights are attached to the shaft to smooth out vibrations 6 CONNECTING RODS The connecting rods are of forged steel and are drilled to provide lubrication to the piston pin bushings Lubrication to the connecting rod bearings is provided from drilled passages in the crankshaft and from splash The rod bearings are selected fit bushings The piston pins are hardened steel and are a pressed fit into the connecting rod Steel backed bronze bearings are a selective fit to the pins 7 CRANKSHAFT SEAL Early Type The crankshaft seal surface is a flat vertical bearing with a spring loaded bellows attached to the bearing retainer A lapped seal face is held by the constant spring pressure against a lapped and polished cast iron seal face as shown in Figure 11 Two neoprene rings used One ring is located in the bearing retainer plate and the
2. NAN e s A drip ME 320 cubic feet of air minute at high speed DES Wins toda v oett hd Nus Snes Approximately 20 amps CHRYSLER SERVICE MANUAL AIR CONDITIONING 629 SPECIAL TOOLS Refer to Figure 27 Number Tool Name 9004 TESTING OUTFIT Consisting of one manifold complete with two valves one 30x300 lbs compound gauge and one 600 lbs pressure gauge Use with C 3365 and 3366 Test Hoses C 3355 GOGGLES Safety Pair 288096 HER THERMOMETER SET Two in separate pocket cases Calibrated from minus 0 to 220 530444 TORCH Leak Detector Includes extra tank of liquid petroleum fluid 99DB WRENCH Flare Nut Open End Box Type 7 and 118 two per set 3361 22 2 WRENCH Ratchet Special Refrigeration 14 sq Drive with 34 sq and 14 Hex in Handle CG 8572 en ede EI VP PUMP Refrigeration Vacuum Pump charged with 75 Vis Ref Oil 3128 iy ss PLIERS Drive Pulley Seal Retainer Snap Ring 3420 iicet Ab ERES ADAPTOR Freon Cylinder Valve to Test Hose C 94291 eis adel usia CLIP Set of two Attaching Thermometer to Tube 2 3363 2424064 6646 WRENCH SET Flare Nut Open End Box Type 34 and 1 Openings two per set 029865 85 54 18 awed HOSE Test with End Plugs 4 Feet Long set of two use
3. 9 Allow test to continue When the tempera ture of the suction pressure tube at the evaporator drops to 30 F 5 the light should go out 10 With the temperature of the suction pres sure evaporator outlet at or above 45 F 5 the thermal switch contacts should be closed and the electrical circuit to the solenoid complete If the test results are as outlined then the solenoid valve is func tioning or the temperature would not change If the light goes off and on the thermal switch is functioning g Testing Operation of Expansion Valve for Proper Super Heat Refer to Paragraph 40 and test operation of expansion valve for proper super heat h Final Test Remove test equipment from vehicle and road test car 24 TESTING FOR LEAKS WITH LEAK DETECTOR Where a system has been found to be low on 640 CONDITIONING CHRYSLER SERVICE MANUAL Freon or following repairs on the system that necessitated the opening of a connection it is necessary to test for leaks and tighten connec tions or make repairs as required before the system is charged and put in operation If a system has been discharged for making repairs or to eliminate moisture the system must be evacuated before partially charging to test for a leak Partially charge the system with Freon 12 as outlined in Charging the System with Freon 12 Paragraph 27 and proceed as follows This is necessary only where the Freon supply in th
4. O ring in bellows with refrig erant oil and place bellows and snap ring over compressor shaft 8 Install puller as shown in Figure 17 Com press bellows with puller and at same time rotate the bellows assembly to insure proper alignment This will prevent pinch ing ring which would result in a leaky seal 9 Install snap ring retainer when bellows clear groove in shaft Remove puller Cau tion Check the snap ring to be positive that it is securely seated in the shaft groove otherwise it may slip out and result in a leaky seal 10 Install brush holder assembly 11 Install pulley and magnetic clutch assem bly lining up key and keyway 12 Push assembly over shaft and install washer and self locking bolt 18 Tighten bolt to 20 foot pounds torque Back seat both service valves and bleed air from compressor Tighten oil filler plug 14 Install protective caps and test for leaks NOTE When new seals are installed leaks are more noticeable than after system has been in opera tion for a while and parts are worn in 37 MAGNETIC CLUTCH service to the magnetic clutch assembly is lim ited to the following parts Drive plate pulley and electromagnet assembly snap rings and brush holder assembly CAUTION DO NOT attempt to remove the electromagnet coil from the pulley assembly The coil 18 held in place by a special adhesive material Once this bond is broken the coil cannot be re attach
5. 642 AIR CONDITIONING about one turn clockwise Carefully watch scale and shut Freon 12 tank valve off when sys tem has absorbed four pounds of Freon 12 If a partial charge is desired for testing leaks charge system with one pound of Freon 12 or charge until 100 pound pressure is reached on the discharge pressure gauge Close suction valve on gauge manifold clock wise To disconnect Freon 12 tank loosen eight foot test hose and allow Freon in hose to escape slowly then remove hose from tank 28 ADDING FREON 12 BY SIGHT GLASS METHOD In some cases due to extenuating circumstances it may be necessary to add Freon 12 to the sys tem to provide cooling without weighing the Freon as is normally required Follow the preliminary steps in charging the system but eliminate those steps involving the scale Start the engine and operate at 1200 rpm Turn the blower control switch to the Low position and the temperature switch to Cold Rotate both the suction and discharge service valve stems one turn clockwise Where discharge gauge hand fluctuates when engine is running close discharge valve slowly counter clockwise until gauge hand steadies Open the Freon tank valve 14 turn Open the suction valve on the gauge manifold slightly counter clockwise Control the Freon entering the system with this valve DO NOT allow suc tion pressure to EXCEED 60 psi Carefully watch the sight glass CLOSE gauge ma
6. 800 rpm With hand brake on move transmission con trol lever to drive range and back to neutral posi tion Readjust fast idle if necessary Lock round nut with hex nut 48 REPLACING EVAPORATOR FILTER The filter should be replaced whenever it be comes dirty This would normally be at the time when bugs dirt etc are removed from the radi ator and condenser To replace the filter remove the evaporator cover and lift out old filter and place new one in bottom of evaporator housing and replace cover 49 ELECTRICAL SYSTEM CIRCUITS De Luxe The electrical circuit wiring diagram is illus trated in Figure 26 d Blower Circuit The voltage drop of the blower circuit from the battery to the blower motor should not ex ceed 2 volts Blower switch set to High speed position and with a battery voltage of 6 0 to 6 2 voltage The blower motor current draw at six volts is 19 to 22 amperes with battery voltage of 6 0 to 6 2 volts blowers switch in High speed position with windows closed and fresh air vents open b Temperature Control Circuit The magnetic clutch coil draws 3 8 to 3 6 amperes at 6 0 to 6 2 volts The solenoid valve draws 2 1 to 2 3 amperes at 6 0 to 6 2 volts c Blower Resistors In the Low speed position the resistors are in series The total resistance is 7 ohms approximately In Medium speed position only one resistor is in the circuit The resistance of the resist
7. AIR CONDITIONING 657 13 Install wires on terminal block mounting making sure connections are tight Check motor for proper operation 14 Place cover into position on evaporator housing and install mounting serews and lockwashers Replace fresh air control levers 42 BLOWER Removal Disassembly 1 Remove fresh air control lever from shafts on both sides of evaporator 2 Remove the evaporator housing rear cover mounting serews and washers and remove cover from compartment 9 Remove the four air inlet ring mounting serews and the air inlet ring 4 Usean Allen wrench to loosen the set serew of the appropriate blower fan and remove fan from shaft and housing If both blower fans are to be removed mark the right and left fan so that they may be reinstalled in the correct location to rotate in the right direction b Assembly and Installation 1 Mount correct blower fan on shaft but do not tighten set screw Refer to Fig 5 2 Replace air inlet ring and tighten the four mounting screws securely 3 Position blower fan on shaft so that it is 14 inch from the inlet ring 4 Tighten the set screw securely on the flat of the shaft 5 Rotate fan by hand to make sure there is no interference between housing and fan at any point when fans are rotated Replace rear cover Replace fresh air control levers 43 CONDENSER REMOVAL AND INSTALLATION a Removal 1 Discharge s
8. Freon 12 27 CHARGING SYSTEM WITH FREON 12 Connect the eight foot test hose to the center fit ting of the gauge manifold and to the connection of the Freon 12 tank as shown in Figure 9 Be sure both gauge manifold valves are fully closed clockwise Open both the discharge and suction service valves one turn clockwise if not previously done NOTE Where discharge gauge hand fluc tuates when engine is running close discharge valve slowly counter clockwise until gauge hand steadies Open the valve on the Freon 12 tank slightly and loosen the eight foot test hose at the gauge manifold Leave connection loose for about a second to purge the air from the hose Close Freon tank valve Start the engine and operate at 1200 rpm with blower control set to Low and Temperature control set at Cold Set the Freon 12 tank upright in a pail of warm water Temperature of warm water not to exceed 125 degrees F Set pail and Freon tank on scale Tool C 3429 and weigh assembly Make a note of the combined weight WARNING It is absolutely essential that an accurate scale Tool C 3429 be used Bath scales are not accur ate below 100 lbs Open the Freon 12 tank valve turn Open suction valve on gauge manifold slightly coun ter clockwise Control the Freon 12 entering the system with this valve DO NOT allow suction pressure to exceed 60 psi Be sure both discharge and suction pressure service valves are open
9. a Removal 1 Discharge the system as outlined in Para graph 25 2 Remove rear seat seat back and panel 5 607 Fig 24 Removing Evaporator Drain Tubes 3 Remove the evaporator cover and discon nect the electrical lead wires Place blocks under evaporator at each end to act as sup ports when attaching bolt nuts are removed 4 Raise the car and disconnect the suction pressure liquid and by pass connectors being sure to tag the liquid and by pass tubes for identification purposes when re connecting 5 Unscrew the drain tubes from the lower side of the trunk floor pan as shown in Figure 24 6 Lower the car Remove the fresh air duct hoses from the fresh air valve flanges at each end of the evaporator 7 Remove mounting brackets to the car body attaching nuts and washers 8 Remove evaporator from car pulling dis connected refrigerant tubes up through floor pan CAUTION Cap all disconnected connections to prevent entrance of dirt and or moisture into the system b Installation 1 Lift evaporator assembly into car trunk while guiding refrigerant tubes through hole in floor pan and set assembly on blocks 2 Install attaching bolt washers and nuts It may be necessary to pry assembly up to compress rubber seals so that the nuts can be started CHRYSLER SERVICE MANUAL Fig 25 Fast Idle Device 3 Install fresh air duct hoses and electrical lead wires 4 Raise the
10. discharge and suction serv ice valves by turning the valve stems coun ter clock wise 13 Replace protective caps on discharge and suction service valves 43 REPLACING DAMAGED COMPRESSOR To replace an old compressor with a new one where the indications are the compressor has failed and where metal particles are circulating in the system proceed as follows Hemoving Compressor 1 Completely discharge the entire system as outlined in Paragraph 25 2 Remove the drive belts and generator ad justing strap from compressor Refer to Fig 12 3 Disconnect the discharge and suction tube flared connectors at the compressor muf flers shown in Figure 12 4 Always use two wrenches when disconnect ing flared connections to prevent damage to flares or tubes 5 Remove the four compressor to mounting bracket bolts 6 Remove compressor and set on bench Be careful not to damage brushes when remov ing or installing magnetic clutch 7 Remove clutch assembly by removing re taining bolt from end of shaft While sup porting clutch with one hand tap on the pulley with a soft hammer and remove assembly 8 Remove receiver strainer drier unit expan sion valve and solenoid valve 9 Connect jumper tubes across vacated spaces left by removal of receiver strainer drier unit expansion valve and solenoid valve 10 Connect a pressure pump to the suction side of the system 11 Connect a hose or t
11. of fan fan vanes should point up and toward rear of car Fans are not interchangeable with each other and must be installed as shown in Figure 5 BOTTOM VANES SLANT UP AND BACK 54x579 Fig 5 Blower Fan Right 638 AIR CONDITIONING 8 Switch fans to opposite ends of motor shaft if they are improperly installed at wrong end of motor Blower fans should clear inlet ring not to exceed 1 inch Fans may be moved in or out by loosening Allen set screw in fan hub 9 Check direction of motor armature rotation Fans should rotate clockwise when viewed from left side of car 10 Remove motor and turn assembly around if rotation is incorrect Be sure blower fans are properly installed Check speed by rotating blower switch to High Medium and Low 11 Turn blower switch to high position Test battery voltage at battery Fully charged battery should read from 6 to 6 2 volts with blower switch on high speed position En gine not running Test voltage from motor lead junction block to ground Difference voltage drop between voltage at battery and at motor should not exceed 2 volts Test ground circuit from motor ground to frame voltage drop should not exceed 1 volt 12 Clean and tighten all connections if voltage drop exceeds specifications Install evap orator housing cover b Testing Compressor Valves 1 Start engine and operate at 1200 rpm 2 Turn blower switch to High and the tem peratu
12. other in the seal ring small amount of oil seepage is always present at the seal to pro vide lubrication to the seal A small fan is at tached to the seal assembly to rapidly dissipate heat 8 CRANKSHAFT SEAL Late Type A new type oil seal is now in production for the air conditioning system compressor shaft Fig 15 A heavy spring type bellows presses against a carbon seal which is held into the front bear ing retainer plate An ring fits into a groove in the bearing retainer plate A smaller ring is mounted inside the bellows and bears against the compressor shaft The seal assembly is held in place by a snap ring NOTE The early type seal assembly functions only with the early type bearing end plate The late type seal can be used only with the late type bearing end plate 9 CRANKCASE OIL CHECK VALVE small self energizing check valve is located in the oil return passage between the suction mani fold and the crankcase The oil that is entrained in the refrigerant is separated from the refrig erant in the manifold due to velocity The oil flows through the return passage opens the check valve and flows into the crankcase Another function of the check valve is to re duce the amount of oil pumped out of the com pressor after a prolonged idle period Oil and Freon 12 are miscible in each other and during periods of non operation the oil in the crankcase absorbs some refrigerant When the
13. snap ring hub as shown Figure 21 with Tool C 3301 Place suitable sleeve against hub and re move drive plate by tapping against sleeve with a hammer DRIVE PLATE SNAP RING BEARING SNAP RING 54x610 Fig 21 Removing or Installing Magnetic Clutch 3 4 5 6 7 025 035 INCH Snap Ring Inspect springs for loss of tension and or cracks Inspect liner on face of plate Replace drive plate if liner is worn springs are weak or broken and if drive plate is warped A sintered iron liner impregnated with fibr ous material is bonded to the drive plate If this liner is worn through replace drive plate Start drive plate hub squarely into inner bearing race Place a brass drift against the drive plate inner hub and tap plate hub into bearing by tapping on brass drift with a hammer In stall snap ring on drive plate hub AIR GAP ADJUSTING SCREWS AIR GAP 54x605 Fig 22 Adjusting Air Gap CHRYSLER SERVICE MANUAL AIR CONDITIONING 653 8 Measure air gap between drive plate electro magnet as shown in Figure 22 Air gap should measure 025 to 035 inch 9 The air gap is adjusted by turning the serews located in the center of the three hexagon headed nuts on the front face of the drive plate Adjust all three serews to obtain evenly spaced gap Measure air gap with a long feeler that will reach into gap at hub d Installing Cl
14. test hoses To admit pressure to gauges rotate valve stems of both suction and discharge service valves one turn clockwise 23 INSPECTION AND TESTING OF COMPLETE AIR CONDITIONING SYSTEM The following test procedures have been set up as a logical sequence for testing the air condi tioning system for proper operation and isolating any of its components that are not functioning as they should d Preparation for Tests 1 Move car into a well ventilated area and 2 3 4 5 6 7 shut off engine Connect exhaust suction System to tail pipe Inspect condenser and radiator for bugs etc Blow out from side opposite entrance with compressed air Place an electric fan 15 to 20 inch in front of radiator in such manner as to blow as much air as possible over the condenser and maintain the temperature pressure rela tionship as specified in Paragraph 40 Place fender covers over fenders Check radiator pressure cap Cars equipped with air conditioning system require fourteen pound pressure caps Replace cap if it does not meet specifications Check or add water to cooling system to maintain proper level Check belt tension by applying a 9 to 12 pound pull with a scale at the center of the longest span Belt deflections should be 1 4 inch for compressor belts each Remove cover from evaporator housing In spect blower fans for proper installation Looking into end of vanes at the bottom
15. 1 4 4 3 SVO LOH ANY JA33 431114 J3SN3QNOD 331340W 55344 dOODS IV HS333 INIT 1311nO Y 1009 NIV 1 0415 CHRYSLER SERVICE MANUAL AIR CONDITIONING 63 Section XVII CHRYSLER AIR CONDITIONING SYSTEM 1 GENERAL INFORMATION The occupants of an air conditioned car may select the temperature and volume of the air that is circulating in the car interior that will provide them with the most comfort In addition to the conditioned air that is recir culating in the car Fig 1 scoops pick up fresh air from the outside bring it through ducts into the evaporator where it joins with the circu lating air With the blower operating at high speed more than 300 cu ft per minute of cool air is forced into the Approximately 14 of this is outside air This will give a complete change of all the air in the car every 114 minutes By providing this complete change of filtered air in air conditioned cars every 114 minutes it is unnecessary to open the car windows in either winter or summer This greatly reduces road noises and keeps out practically all dirt when driving in dusty areas Three blower speeds are provided with each of the two cooling conditions Low Medium and High in the Cold or full capacity cooling posi tion Low Medium and High in the Cool or Moderate cooling position A
16. 628 AIR CONDITIONING CHRYSLER SERVICE MANUAL CHRYSLER AIR CONDITIONING SYSTEM COMPRESSOR Location osten ties wes eter os EE On right bank cylinder jbu 2 cylinder Bes y muwu 2 inch STOKE cue sd 13 inch Displacement ehe s pO dia d Sa edet e eu ert 8 67 cubic inch bii OO TRENT EE RT Reed Type Speeds cae eae eee wa 935 rpm at 25 mph Oil Capacity MOPAR Refrigerant Oil 800 Saybolt 12 ounces CONDENSOR LOCA lOM esrara Sn Ala ROE ae ed Front of radiator RECEIVER STRAINER DRIER ei oe Cylindrical steel container 11068101 EMT Front of Front Frame Crossmember REFRIGERANT Roiri erant u oie ad Ba was Freon 12 Total Charges 4 pounds we eee Mm Luggage Compartment BLOWERS T E su Z Centrifugal 22524222 evaporator unit
17. ansion valve to distribu tor flared connection and remove expansion valve CAUTION Protect trim and finish against oil refrigerant escaping from valve body when removed Use extreme care not to damage tubing flares 1 ways use two wrenches when possible SEAL OR PLUG all openings to system immediately if valve is removed for cleaning INSTALL new valve immediately if valve was removed for re placement This will prevent dirt and moisture from entering the system 6 If valve is to be cleaned and reinstalled re move the liquid tube inlet fitting from the valve body The inlet fitting contains the fine mesh screen Wash accumulation of any substance from the screen with carbon tetrachloride and blow dry with compressed air 7 Remove the protective cap from the valve spring and remove the valve assembly from the valve body 8 Wash valve parts with carbon tetrachloride and blow dry with compressed air and assemble valve b Installation 1 Clean the thermal bulb well on the suction tube the thermal bulb and the copper strips This will assure a good thermal contact 2 Insert copper strips and thermal bulb in well 3 Connect the expansion valve to distributor flare connection and install retaining clip 4 Connect the liquid tube and the equalizer tube 5 Using two wrenches tighten the flared nuts 6 Evacuate and charge the system as outlined in Paragraphs 26 and 27 7 Be sure to tes
18. aporator The valve is also the dividing point between the high and low pressure and temperature sides 19 AIR CONDITIONING SYSTEM CYCLE Starting with the compressor inlet the vapor entering the compressor is at a relatively low temperature and pressure On the downstroke of the compressor piston the suction valve opens due to differential pressure not mechanically operated as in an automobile engine and vapor is drawn into the cylinder On the up stroke the suction valve closes and the vapor is com pressed until sufficient pressure is reached to force open the discharge valve discharging the high pressure and temperature vapor into the condenser In the condenser the heat of compression and the heat absorbed by the refrigerant in the cool ing coil is rejected to the air flowing over the finned condenser tubes and the refrigerant is liquefied AIR CONDITIONING 635 The liquid refrigerant then flows into the re ceiver which acts as a storage tank In the receiver it passes through a strainer drier unit which removes dirt and moisture The liquid refrigerant then enters the expansion valve which throttles the flow so that some of the refrigerant flashes into vapor and cools the re maining liquid down to the saturation tempera ture at the expansion valve outlet The liquid and vapor then enter the cooling coil in the evaporator where the remaining liquid evaporates due to heat absorbed from the air flowing through i
19. car and connect the suction pres sure by pass and liquid tube connectors using new copper washers in flare con nections 5 Install drain tubes through floor pan and into evaporator 6 Lower car and charge system with a partial charge and test for leaks as outlined in Paragraphs 24 and 27 7 Correct any leaks found evacuate and charge system with four pounds of Freon 12 8 Install panel seat back and rear seat Re place cover and test operation of blowers and cooling system 47 FAST IDLE DEVICE See Fig 25 The fast idle device is intended to increase en gine idle speed from 700 to 800 rpm when the transmission control lever is moved from drive to neutral when the air conditioning system is in operation This is desirable for prolonged stops in heavy traffic If accelerator is depressed and released when the fast idle device is energized it will further increase engine speed to approxi mately 1100 rpm To set fast idle device back off round adjust ing nut on diaphragm shaft away from the pawl this prevents interference with idle adjustment Start engine attach tachometer and with trans mission control lever in Neutral position and engine at operating temperature adjust engine idle to 475 500 rpm AIR CONDITIONING 659 Turn blower control switch to first position temperature control switch to second position Adjust round adjusting nut on fast idle dia phragm shaft to increase engine 700 to
20. ccording to the diagram to resistors that are reversed the proper blower speeds are not pos sible To correct for the proper blower speeds reverse the red and black wires on the resistor block Fig 26 With the wiring connected to the proper resistors three distinct blower speeds are apparent Two types of temperature control switches have been used on the 1955 air conditioning equipped cars as shown in Figure 26 The only difference in the outward appearance other than the escutcheon plate is that the early switch has no terminal markings The late type switch ter minals are marked with an 5 and a The switches vary internally and the wiring to the two switches is reversed The escutcheons and the switches are not interchangeable 50 ROAD TESTING CAR Determine that the system is now functioning properly and instruct all parties concerned in cluding owner how to obtain the maximum results from the air conditioning system CHRYSLER SERVICE MANUAL AIR CONDITIONING 661 soo pi edc z B 4 2 314 ONIHOI3A NOI 135 4313WOWM3H1 966 1001 343V13 829 1001 831105 39 1 OR LORE ORO 08 2 1001 13 39 1 6SEE D 1901 Saad 8216 3 1001 2 34311nd Was 55344 00 9 2 1001 8 1001 trye HOYOL Y O1D3130 LAN 33V13 2966 3
21. choice of the three blower speeds for circulating air without the air being cooled by the air conditioning unit is also provided The refrigerant used in the Air Conditioning System is Freon 12 AIR CONDITIONING SYSTEM COMPONENTS 2 COMPRESSOR The compressor as shown in Figure 12 is a two cylinder reciprocating type unit with a speed of approximately 935 rpm at 25 mph 3 COMPRESSOR LUBRICATION Lubrication is by a combination of splash and centrifugal pressure As the rods counter weights and slinger rotate through the oil in the crankcase it is picked up and thrown over the interior of the crankcase The rear main bearing is lubricated by this splash and the connecting rods are partially splash lubricated In addition to the splash lubrication oil is thrown into cavities in both bearing retainer plates As the shaft rotates a pressure is built up on the oil in the rear bearing retainer cavity and the oil is forced through the rifle drilled crankshaft Transverse passages are drilled through the shaft and supply oil to the connect ing rod bearings the piston pins and the shaft seal The front main bearing is lubricated from the oil in the front bearing retainer plate oil cavity 4 COMPRESSOR VALVES The discharge and suction valves as shown in Figures 2 and 3 are inertia type Reed Valves MHIV 2 9 eines ERMAL SWITCH F TYONYW 5 5
22. cing screwdriver in shaft keyway slot and allow it to rest against pulley leg while turning puller screw See Fig 17 4 When bellows have compressed far enough to clear the snap ring retainer remove snap ring with snap ring pliers 5 Change puller screw in center of puller Fig 18 Turn in on center screw and remove compressor front bearing end plate and seal assembly 6 Remove pulley from end plate Remove carbon seal and ring from bearing end plate d Installation After Type Seal 1 Coat new bearing end plate gasket and large O ring with refrigerant oil Install O ring in front bearing end piate CAU TION Be sure that oil pocket is up CHRYSLER SERVICE MANUAL AIR CONDITIONING 651 Fig 18 Removing End Plate 2 Install gasket end plate and two long screws at opposite sides of end plate 3 Start end plate squarely and tighten screws evenly finger tight Install puller as shown in Figure 19 4 While holding compressor shaft with screwdriver turn puller screw to pull bearing end plate into compressor housing 5 Remove puller install end plate screws and tighten screws evenly to 20 foot pounds torque 6 Coat carbon seal with refrigerant oil and place over shaft positioning tangs on car bon in the recesses in the bearing end plate soe 55 158 Fig 19 Installing End Plate 7 Lubricate
23. compressor is started following a long idle period the check valve is closed to a small orifice by crank case pressure so that pressure will reduce slowly The slow reduction of crankcase pres sure minimizes foaming of the oil and con sequently oil pumping 10 PISTONS AND PINS The cast iron pistons are a selective fit to a very close tolerance with the cylinder bore Due to the close fit of the pistons in the cylinder bores it is not necessary to use piston rings thus reduc ing friction and wear 634 AIR CONDITIONING 11 OIL LEVEL An access plug is provided in the crankcase for the purpose of measuring the height of the oil in the crankcase See Fig 12 A new compressor before installation contains 12 ounces of oil and is charged with dry air however due to some of the oil being picked up and entrained in the system the crankcase does not contain 12 ounces of oil after it is in service The proper height of the oil in the compressor after it is in service should not exceed 34 inch to one inch as measured on a dip stick inserted through the access hole A sight glass is pro vided to indicate that oil is present but does not tell how much 12 SERVICE VALVES Due to the fact that it may be necessary to re move the compressor for compressor or engine service and also to provide means for connect ing test equipment two service valves are provided The suction service valve is attached to the inlet s
24. connect the Wade connector at solenoid valve and insert special adaptor as shown in Figure 6 in series with disconnected connector and Wade terminal 2 The adaptor as shown in Figure 7 is for testing the thermal switch and solenoid valve It may be fabricated by using two 903895 terminals a 1310489 Wade con nector two inch 16 ga copper wire stripped as shown and a piece of 16 ga bare wire 34 inch long to wrap around bared section of two inch wire and solder in place 3 Connect lead from test lamp Tool C 744 to adaptor and ground the remaining test lamp lead to a good clean ground 4 Place test lamp suction cup on fender so light is visible from right rear of car as shown in Figure 6 5 With engine running at 1200 rpm turn the blower control knob to Low speed and the temperature control to Cold Close all car windows doors and cowl ventilator Fig 6 Thermal Switch and Solenoid Valve Test Adaptor Connected WADE CONNECTOR 16 GAUGE TERMINAL TERMINAL 3 4 INCH 16 GAUGE BARE WIRE MN O TEST LIGHT LEAD 54 X536 Fig 7 Test 6 Install thermometer clip on evaporator suc tion tube outlet fitting place thermometer in clip and wrap clip and bulb with a rag 7 Check temperature reading of thermometer at evaporator suction pressure outlet 9 If temperature reading is 45 5 higher the test lamp should be lit
25. d install the bolts lockwashers and nuts Tighten evenly to 85 foot pounds torque Install generator adjusting strap Adjust compressor drive belt tension to ob tain a 14 inch deflection 9 to 12 pound pull with scale applied at the center of the long est span between pulleys Connect flared tubes to compressor muffler connectors using two wrenches Fig 12 Compressor Installed CHRYSLER SERVICE MANUAL 6 Use new copper washers flared connec ticns 7 Install manifold gauge set Tool C 3354 and attach eight foot test hose to gauge mani fold center fitting and to vacuum pump Refer to Paragraph 22 8 Evacuate and sweep the system as outlined in Paragraph 26 During the time that the sweep charge is in the system test for leaks as outlined in Paragraph 24 Continue evac uation procedure after eliminating any leaks found 9 Charge system with four pounds of Freon 12 as outlined in Paragraph 27 Operate system for 20 minutes engine running at 1200 rpm Blower control set at High and temperature control at Cold Stop engine and check oil level as outlined in Paragraph 82 10 Rotate discharge and suction service valve stems counter clockwise until fully back seated 11 Remove gauge set manifold and replace protective caps 34 REMOVAL AND INSTALLATION OF COMPRESSOR FOR ENGINE OR COMPRESSOR SERVICE a Removal To eliminate the need of discharging the com plete system f
26. e system is very low or where system has been evacuated The Tool C 3444 using petroleum gas does not require generating to light Just turn valve on and light it and adjust to small flame Move the leak detector snifter tube over all connections When a leak is found the flame in the burner will turn bright green Move the de tector tube around the connection to determine the magnitude of the leak If a larger leak is found the color of the burner will turn from bright blue to bright purple If a leak is found at a flared connection try tightening the connection using two wrenches If the leak cannot be eliminated by tightening the system must be discharged The connection or flare must be reseated or replaced and the system evacuated and again partially charged and retested If no leaks are found add to the partial charge until the system contains four pounds of Freon 12 29 DISCHARGING FREON Install gauge set manifold Tool C 3354 if not installed as shown in Fig 8 Using Tool C 3361 be sure both discharge and suction serv ice valves are fully back seated counter clock wise Connect eight foot test hose to the gauge set manifold center fitting Insert the free end of the eight foot test hose into exhaust suction system and turn exhaust system blower on Although Freon is non toxic unless released in or near an open flame expelling the Freon gas into the exhaust system is a recommended safety precaution Ope
27. e discharges it to the outside air 20 OPERATING THE AIR CONDITIONING SYSTEM The procedure required of the driver to operate 636 AIR CONDITIONING CHRYSLER SERVICE MANUAL the Air Conditioning System has been reduced to a minimum The only action required when the occupants of an air conditioned vehicle desire air conditioning is to close the car windows and cowl ventilator if open then with the engine running turn on the blower and temperature control switches Where a car has been parked in the hot sun it is sometimes advisable to open car windows drive for a few blocks then close windows and turn on air conditioning The contro switches are mounted on a single shaft and are conveniently located to the left of the steering column on the instrument panel Periodic owner service is limited to an occa sional cleaning of the outside of the condenser about as often as bugs and other matter are cleaned out of car radiator No special care is required for winter with the exception of closing the fresh air doors by turning the levers on the evaporator in the luggage compartment See Fig 2 SERVICE PROCEDURES 21 PRECAUTIONS IN HANDLING FREON 12 Freon 12 when properly used is harmless How ever a few simple precautions should be ob served to guard against injuries or sickness that might occur where it is improperly handled a Do Not Expose Eyes to the Liquid When working around a refrigerating s
28. ed a Testing Electromagnet Current Draw To test the coil for a short or open circuit con nect an ammeter 0 10 AMP Scale in series with a fully charged 6 volt battery and the in sulated brush lead The current draw at 6 volts should be 3 3 to 3 6 amperes 652 AIR CONDITIONING CHRYSLER SERVICE MANUAL DRIVE PLATE ELECTROMAGNET COLLECTOR A PULLEYS BEARING SNAP RINGS DRIVE PLATE SNAP RING 54x536 Fig 20 Magnetic Clutch Assembly Exploded b Removing Clutch Assembly from 1 2 3 4 5 Compressor Operate the engine at 1200 rpm for five to ten minutes until the compressor is warmed up and system is stabilized then shut off engine Rotate both compressor service valve stems fully clockwise Loosen both port caps and the oil filler plug a few turns This should always be done to release pressure from the compressor be fore the pulley and clutch assembly is removed Loosen drive belts and remove them from the compressor pulley Remove upper right shroud section Remove inch special locking bolt and washer from compressor crankshaft at front center of clutch CAUTION DO NOT damage brushes when removing or install ing clutch While supporting clutch assembly with one hand tap the pulley with a soft hammer to jar hub from tapered shaft and remove assembly from compressor c Removing and Installing Drive Plate 1 2 Remove drive plate retaining
29. etes the electrical circuit to the solenoid windings which energizes the sole noid and closes the valve The flow of hot gas through the by pass line is cut off and the system can then operate at full capacity CHRYSLER SERVICE MANUAL 17 THERMAL SWITCH A Thermal Switch is provided to prevent frosting of the evaporator such as might occur on cool days when the air conditioning system is being operated in the full capacity cooling position with the blower speed set at Low The thermal switch shown in Figure 6 is attached to the suction pressure line at the evap orator outlet manifold The electrical contacts in the switch are connected in series with the temperature control switch and the solenoid by pass valve winding In the normal position the contacts are closed A decrease in the tem perature of the refrigerant gas leaving the evaporator will cause the thermal blade to bend and open the electrical circuit to the solenoid valve when the temperature reaches approxi mately 25 degrees F Opening the solenoid valve allows a charge of hot refrigerant gas to flow into the evaporator When the temperature in creases again to approximately 40 degrees F the contacts close and the solenoid will energize closing the by pass valve 18 EXPANSION VALVE The expansion valve shown in Figure 2 is attached to the inlet distributor of the evap orator The purpose of the valve is to meter the flow of liquid refrigerant to the ev
30. g9 2 1001 99 2 1001 5434 38 38111 2 5 S3SOH 1531 SNO1 ISOH 1531 9562 1001 5412 ZZEED 1001 579909 3313 A18W3SSV WANIYA VSEE D 1001 A18W3SSV GIOJINVW 13S 662 AIR CONDITIONING CHRYSLER SERVICE MANUAL SERVICE DIAGNOSIS The following items of improper functioning of Air Conditioning System are meant to be used in conjunction with test procedures as out lined in Paragraph 40 No attempt should be made to use the diagnosis information as a method of trouble shooting or spot checking Properly used as an aid to the complete test procedure the diagnosis will be of considerable value to the service man 51 BLOWERS NOT OPERATING Possible Causes a Faulty circuit breaker b Open circuit in wiring Faulty motor winding Faulty control switch resistors Loose connections Motor burnt out Armature shorted or grounded Bearings frozen i Stuck or worn brushes Remedies a Test circuit breaker with jumper wire Replace faulty circuit breaker b Test electrical circuit with point to point voltmeter test Replace or repair broken wire Replace motor d Test switch and resistors with voltmeter or jumper wire Replace faulty switch or re sistors e Test circuit with voltmeter for voltage drop Clean and tighten all loose connections f Replace motor g Replace armature h Replace motor i Replace b
31. ide of the compressor as shown in Figure 4 The discharge service valve is connected in the discharge tube at the inlet side of the condenser See Fig 3 Rotating the valve stems clockwise until the valves are fully seated front seats the valve and isolates the compressor from the system Rota ting the valve stem clockwise from the back seat position also opens the service port to supply pressure to the gauges Rotating the valve stems counter clockwise back seats the valves and is the operating position 13 MAGNETIC CLUTCH The magnetic clutch shown in Figure 20 is pro vided in the compressor drive pulley The clutch consists of a spring loaded drive plate that is attached to the compressor crankshaft The electro magnet coil is mounted in the pulley with the ends of the coil connected to separate brush or collector rings Hinged type brush holders hold the brushes against the collector rings When the electro magnet is not energized the pulley assembly free wheels on a double roll ball bearing When the electro magnet is energized the plate is magnetically attracted to the electro CHRYSLER SERVICE MANUAL magnet and the compressor crankshaft is then coupled to the drive pulley The magnetic clutch can be engaged at engine speed without damage sintered iron brake shoe impregnated with fibrous material is bonded to the drive plate to reduce chatter and wear during engagement 14 EVAPORATOR The evaporato
32. m both the discharge and suction service valves 650 AIR CONDITIONING CHRYSLER SERVICE MANUAL RING 3 4 5 6 7 GASKET END PLATE O RING CARBON STEEL BELLOWS 55 154 Fig 15 Compressor Shaft Seal After Type Close off both valves by rotating both valve stems clockwise with Tool C 3361 until they are fully seated Gradually loosen oil filler plug a few turns to release pressure from compressor Remove the upper right hand radiator fan shroud Remove the self locking bolt and washer from the compressor shaft at the front center of the magnetic clutch While supporting pulley and clutch assemb ly with one hand tap the pulley with a soft hammer to jar hub from tapered shaft and remove assembly from compressor Be careful not to damage brushes when re moving pulley and clutch assembly Remove brush holder assembly Fig 16 Puller Installed Tool C 3473 Fig 17 Removing Seal Bellows b Removing Before Type Seal Push seal ring towards compressor and remove snap ring with snap ring pliers Tool C 3106 Pull seat assembly from shaft Fig 11 It may be necessary to pry bellows from front bearing end plate with a screwdriver c Removal After Type Seal Fig 15 1 Remove compressor front bearing end plate screws 2 Install special puller Tool C 3473 as shown in Figure 16 3 Hold compressor shaft from rotating by pla
33. m if the suction valves are in good condition 5 Replace valve plate assembly if defective Shut off engine while watching the gauge 6 The vacuum should not lose over five inches in one minute if the discharge valves are in good condition 7 If when the engine is stopped should the gauge hand drop back to zero the valves are defective and should be replaced Replace the complete valve plate assembly b Replacing Valve Plate Assembly Gauge Set Installed 1 Rotate the discharge and suction service valve stems clockwise until both valves are fully front seated 2 Slowly open the discharge gauge set hand valve slightly to relieve compressor pressure through the center outlet hose and into the exhaust suction system 3 When pressure drops to zero on discharge gauge open suction pressure gauge set hand valve 4 Remove compressor cylinder head bolts and tap the cylinder head with a plastic hammer 5 If when lifting the cylinder head the valve plate comes off with it separate the head from the plate by placing a brass rod against AIR CONDITIONING 649 the plate and head between the cylinders at the side of the head and tapping it 6 DO NOT tap the plate near a finished sur face Remove head valve plate and gaskets 7 Examine the valves if the valves are broken and the parts have damaged the top of the piston or scored the cylinders replace the complete compressor 8 If the compresso
34. mpressor 14 Rotate both gauge set hand valves clock wise until they are fully seated 15 Rotate both discharge and suction service valve stems counter clockwise until they are fully back seated 16 Start engine turn on blower and tempera ture control switches to high and cold Operate engine for five minutes Stop engine and test for leaks as outlined in Paragraph 24 Test system for operation if satisfactory remove gauge set and re place caps 35 REPLACING COMPRESSOR VALVE PLATE ASSEMBLY See Fig 14 a Testing Valves The usual indication of defective or damaged compressor valves is a lack of cooling capacity Before condemning valves they should be tested as follows SUCTION VALVES VALVE Fig 14 Valve Plate Assembly CHRYSLER SERVICE MANUAL 1 Install gauge set on compressor refer to Paragraph 25 2 Start engine turn on blower and tempera ture switches to High and Cold Operate for 10 to 15 minutes at 1200 rpm to warm up compressor so that the crankcase is free of excessive refrigerant saturation 3 Slow engine speed to idle and rotate suction service valve stem clockwise until the valve is fully front seated CAUTION Never front seat clockwise discharge service valve while engine is running or compressor will be damaged 4 Observe suction gauge on gauge set The pressure should drop to zero when valve is seated and on down from 12 to 18 inches of vacuu
35. mpressor on mounting bracket and start bolts tightening finger tight 2 Remove the masking tape from suction service valve and compressor ports being sure both surfaces are clean 3 Coat a new suction service valve gasket with refrigerant oil and place over valve port 4 Install suction service valve and tighten Allen screws to 20 foot pounds torque 5 Install muffler bracket bolt and tighten to 20 foot pounds torque 648 AIR CONDITIONING CHRYSLER SERVICE MANUAL 6 Tighten compressor mounting bracket to compressor attaching bolts to 85 foot pounds torque 7 Remove caps from discharge tube nut and muffler connector Insert a new copper washer and connect flared connection tight ening securely 8 Install compressor drive belts and belt ten sion adjusting strap 9 Adjust belts to a 14 inch deflection with a 9 to 12 pound pull applied with a scale at the center of the longest span between pulleys 10 Install magnetic clutch electrical lead In stall manifold gauge set Tool C 3354 11 Crack the suction service valve open counter clockwise and tighten oil filler plug 12 Crack suction gauge hand valve for an in stant to purge air from compressor and suction tube 13 Close suction gauge hand valve and open discharge service valve counter clock CYLINDER HEAD wise slightly Crack discharge gauge hand valve for an instant to purge air from dis charge side of co
36. n the discharge and suction service valves one turn Crack manifold gauge set discharge hand valve a fraction of a turn counter clockwise to allow gas to escape CAUTION Opening the manifold discharge hand valve too much in order to more quickly discharge the system will draw the compressor lubricant off with the Freon As the pressure on the manifold discharge gauge drops near zero open the manifold suction hand valve NOTE If brazing or some similar repair 18 to be made on system leave the system open to atmospheric pressure After service work has been completed the system must be evacuated partially charged and leak tested before final charge 26 EVACUATING AND SWEEPING THE SYSTEM Whenever the system has been open to atmos phere as in replacing a component to make re pairs or through damage it is absolutely essen tial that the system be evacuated and swept with Freon to remove all air and any moisture that has entered Evacuating the system means that it must be subjected to a suction of 28 inches of vacuum for a period of 30 minutes after sweep ing with one pound of Freon 12 Sweeping the system means to charge a dis charged system with one pound of Freon 12 or charge until a pressure of 100 pounds registers on the discharge gauge Operate the system for five minutes and again discharge to remove as much mositure as possible CHRYSLER SERVICE MANUAL Evacuate the Air Conditioning System as Follows Co
37. nifold suction valve clockwise the moment the sight glass is clear of bubbles Stop ping the flow of Freon into the system as soon as the sight glass is clear free of bubbles is important Too much Freon in the system can cause damage Operate system for five minutes and again observe sight glass for presence of bubbles If there is still evidence of bubbles continue to charge carefully until sight glass is clear and repeat five minute run Where no bubbles are present after five minutes of engine operation charge system with additional Freon for ten Seconds Close Freon tank valve Loosen hose connec tion at tank to gradually release Freon from CHRYSLER SERVICE MANUAL hose Disconnect hose after Freon has escaped Back seat the suction and discharge service valves counter clockwise Remove gauge manifold and install service valve and service port protective caps 29 PRECAUTIONS IN HANDLING TUBING a Cleanliness During Storage and Installation It is of the utmost importance that refrigeration tubing be kept clean and dry Refrigeration tubing is ordinarily purchased in rolls with the ends crimped and sealed air tight When tubing is used from a roll reseal the unused portion of the roll to prevent dirt and moisture from get ting inside A piece of tubing that has been cut flared and prepared for installation should have the ends sealed until the actual installation is being made b Cutting and Flaring Tubing sh
38. nnect gauge set manifold Tool C 3354 to the compressor if not installed as shown in Fig ure 8 Discharge system if not previously discharged as outlined in Paragraph 27 CAUTION Be sure pressure has dropped to zero before at taching hose to vacuum pump Connect the eight foot test hose to the center fitting of the gauge set manifold and to the con nection on the vacuum pump Tool C 3372 Open both discharge and suction service valves about one turn rotating both valve stems clock wise Open both gauge set manifold hand valves turn counter clockwise Start vacuum pump and observe compound gauge Operate pump until gauge registers 26 to 28 inches of vacuum Continue evacuating at 26 to 28 inches for five minutes Failure to obtain 26 to 28 inches of vacuum would indicate a leak in the system SCALE 2 TOOL Fig 9 Charging System with Freon 12 AIR CONDITIONING 641 Close both gauge set manifold hand valves clockwise Turn off vacuum pump and remove long test hose from pump Charge system with one pound of Freon 12 as outlined in Paragraph 27 Start the engine and adjust speed to 1200 rpm Turn blower control to High and temperature control to Cold Operate in this manner for five minutes and test for leaks Discharge the system which will sweep out any remaining moisture Again evacuate the system at 26 to 28 inches of vacuum for 30 full minutes Recharge system with four pounds of
39. nstall plug in receiver Tighten to 20 foot pounds torque CAUTION Never replace a damaged fusible plug with a solid plug Evacuate system as outlined in Paragraph 26 Charge system with 4 pounds of Freon 12 as outlined in Paragraph 27 45 RECEIVER STRAINER DRIER REPLACEMENT Where the receiver strainer drier unit is found to be clogged when tested as outlined in Para graph 23 or where metal particles are found in the system it will be necessary to replace the receiver strainer drier assembly a Removal Discharge system as outlined in Paragraph 25 Lift car with hoist CAUTION Protect eyes with goggles or glasses when dis connecting receiver flare connections to prevent any drops of liquid refrigerant from dropping eyes when connections are broken Disconnect flared connections at both ends of receiver Remove attaching bolt nuts and remove receiver Cap ends of receiver immediately if unit is to be used again Leave caps on connec tors until ready to make connections when installed b Installation Position receiver in place and install bolts and nuts and tighten securely Remove caps and con nect flared connector nuts and tighten securely Charge system with partial charge and test for leaks as outlined in Paragraphs 24 and 27 Cor rect any leaks and evacuate system as outlined in Paragraph 24 Charge with four pounds of Freon 12 as outlined in Paragraph 27 46 EVAPORATOR REMOVAL AND INSTALLATION
40. ntrol to Cold Open car windows 3 Allow engine to operate at 1200 rpm to clear sight glass 4 Observe sight glass on right hand fender panel Sight glass should be perfectly clear no bubbles within three to five minutes from the time engine was started If sight glass is not perfectly clear after three to five minutes operation the thermal switch and by pass valve should be tested as out lined on Page 639 5 If this test is O K the system should be partially charged to remove bubbles Refer to Paragraph 27 6 If the high pressure gauge shows a high pressure and the suction pressure is normal it is an indication of too much Freon In this case bleed off Freon until bubbles appear in sight glass and then charge refer to Para graph 28 to remove bubbles A system that is low on Freon should be tested for leaks corrected and system charged d Testing Strainer Dryer With engine operating at 1200 rpm hold hands on the fittings at both ends of the receiver strainer drier The temperature should be the CHRYSLER SERVICE MANUAL AIR CONDITIONING 639 same at both ends If the end towards the left hand is cooler than it is at the right end right hand the strainer drier is defective partially plugged and must be replaced Refer to Para graph 45 e Check Compressor Oil Level Check oil level as outlined in Paragraph 31 Testing Thermal Switch and Solenoid By Pass Valve 1 Dis
41. or is 22 ohms approximately In the High speed position the circuit is direct for maximum motor speed 660 AIR CONDITIONING CHRYSLER SERVICE MANUAL TO COMPRESSOR CLUTCH TO SOLENOID VALVE TEMPERATURE NORMALLY OPEN WITCH 16 BLUE EARLY COMPRESSOR CLUTCH 16 ORANGE 4 2 SWITCH se am as s s ee eee eee ang USING EARLY TYPE ESCUTCHEON CARBURETOR SOLENOID FAST IDLE 10 RED 16 RED 16 WHITE RESISTORS Z 16 BLUE O STARTER IGN SOL ARM m RELAY Minus TO THERMAL TEMPERATURE SWITCH AS WIRED WHEN 16 RED BLOWER SWITCH LOW 1 10 GREEN 43 52 OHMS 20 20 TO 43 OHMS STARTER AND IGNITION 16 BLACK AND YELLOW SWITCH STARTER STUD TO STARTER AND IGNITION SWITCH ACCESSORY STUD BLOWER SWITCH 30 AMPERE CIRCUIT BREAKER 10 GREEN TEMPERATURE SWITCH LATER TYPE 16 RED TEMPERATURE SWITCH AS WIRED WHEN USING LATER TYPE ESCUTCHEON 16 ORANGE THERMAL SWITCH 16 1 4 IN EVAPORATOR UNIT 10 BLACK NORMALLY CLOSED ABOVE 45 F TO MOTOR 16 BROWN gt NEUTRAL SAFETY SWITCH 55 156 Fig 26 Electrical Circuit Wiring Diagram Some resistor blocks were released with the resistors reversed With the wiring connected a
42. or the removal of the compressor a 55 152 Fig 13 Separating Muffler Bracket AIR CONDITIONING 647 for engine or compressor Service it is permissi ble to split the muffler bracket with a hacksaw as shown in Figure 31 and proceed as follows 1 Start the engine and operate at a fast idle until compressor is warm then shut off engine 2 Remove valve stem protective caps from both the discharge and suction service valves 3 Close off both valves by rotating valve stems fully clockwise with Tool C 3361 4 Loosen the port caps on both the service valves a couple of turns to gradually release the Freon gas pressure from the compres sor Loosen oil filler plug a few turns 5 Remove the drive belts and belt tension adjusting strap from the compressor Dis connect magnetic clutch electrical lead 6 Disconnect the discharge tube flared con nection at the discharge lower muffler and cap tube nut and male connector Re move the Allen screws from the suction service valve 7 Remove the upper muffler bracket to com pressor attaching bolt and gently lay the suction valve muffler and tube assembly to one side Do not bend the vibration elimi nator excessively or it may become dam aged Cover suction port in compressor and suction valve with masking tape 8 Remove the compressor to mounting brac ket and support bracket bolts and remove compressor from engine b Installation 1 Place co
43. ould always be cut with a regular tube cutter Special C 3478 as shown in Figure 10 Never use a hack saw After cutting the tube ream out the inside of the tube with special Tool C 3478 to eliminate all burrs and provide a good seating area when the tube is flared The tube should be double flared with special Tool C 804 Always inspect a flared joint before installa tion to determine if there are any cracks or blemishes on the flare that would cause a pos sible leak It should be emphasized that the re tention of Freon in a system requires flared or brazed joints of the highest quality CUTTING BENDING w FLARING 53 225 Fig 10 8Bending Cutting and Flaring Tubing AIR CONDITIONING 643 CHRYSLER SERVICE MANUAL X 11 5 3J1V1d 11 5 34 1 43171 Twas QV3H 33QNITAD 1108 n id ka T k HDLNID ATNV3 d3Q1OH ANY HS 49 Twas YAHSVM 4425 MIDS 31V1d JAVA UA 11 13 5 92 58344 002 334025 133SVO 644 AIR CONDITIONING CHRYSLER SERVICE MANUAL Copper washers must be used where joint is steel to steel or steel to brass Copper to steel or brass requires no washer Use vaseline on flared surface connections when installing or repairing leaky tube connections to improve sealing and reduce torque required Never u
44. place f Test thermal switch and solenoid valve as outlined in Paragraph 23 g Inspect for cause of obstruction Clean with warm water and compressed air applied from side next to engine Remove bug screens on air conditioned cars h Test temperature pressure relation of re frigerant 54 LOW SUCTION PRESSURE AND LOW HEAD PRESSURE Possible Causes a Low on refrigerant b Strainer drier plugged c Liquid line plugged d Expansion valve super heat setting e Expansion valve thermal valve charge lost or poor contact in wall f Expansion valve screen or port plugged with dirt or moisture g Compressor valves faulty Remedies a Check for leaks refer to Paragraph 24 Re charge as outlined in Paragraph 27 b Test strainer drier as outlined in Para graph 23 Replace if faulty c Replace liquid line d Adjust super heat as outlined in Para graph 40 e Check thermal bulb contact Replace ex pansion valve if required AIR CONDITIONING 663 f Clean expansion valve as outlined in Para graph 39 g Test compressor valves as outlined in Par agraph 23 Replace assembly if faulty 95 LOW SUCTION PRESSURE AND HIGH HEAD PRESSURE Possible Cause a Plugged discharge line or condenser Remedy a Replace or clean line or condenser 56 HIGH HEAD PRESSURE Possible Causes a Exterior surfaces of condenser restricts flow of air due to bugs dirt mud or other ob structions b Ai
45. plug with solvent and blow dry with com pressed air Loosen the cap carefully on the service port of the discharge valve mately 14 turn and gradually release the gas pressure from the compressor 4 When the gas pressure in the head de creases loosen but do not remove the oil filler plug on the side of the compressor This will allow the gas pressure in the com pressor crankcase to drop If the oil level is checked immediately after a trip driven at high speeds the level will be slightly higher than normal 5 Remove the oil filler plug and using a dry clean plunger type dip rod 14 inch welding rod measure the oil level The correct oil level is from 34 to one inch 6 Siphon off excess oil or add MOPAR Air Conditioning Compressor Oil 300 Saybolt at 100 degrees as required 7 After oil level has been checked and cor rected if required replace the oil filler plug but do not tighten at this time 8 To purge air out of the compressor cylinder and crankcase make sure cap on discharge valve service port is loosened approximately 1 turn and oil filler plug on side of the com pressor a full turn 9 Using Tool C 3361 slightly open suction service valve by turning valve stem counter clockwise 10 Let gas drift slowly through the compres sor for about 10 seconds AIR CONDITIONING 645 11 Tighten the oil filler plug and the cap on the discharge service port 12 Back seat both
46. r actual super heat reading find the difference between the thermometer reading and the corrected chart reading We will use the following as an example Insert values obtained in test If super heat is outside specifications of 8 to 15 degrees F replace the expansion valve EXAMPLE OF CHART FOR DETERMINING SUPER HEAT Observed Temperature Temperature at Suction Pressure Corrected Suction Pressure Degrees F Thermometer On at Gauge 2 Ibs Added to Observed From T P Relation Suction Line 48 lbs 43 lbs 39 lbs 37 Ibs 35 lbs Super Heat 2 F 5 F TF 9 F 12 F CHRYSLER SERVICE MANUAL AIR CONDITIONING 655 TEMPERATURE PRESSURE RELATION CHART FOR FREON 12 PRESSURES PRESSURES PRESSURES PRESSURES POP ru FE xn vid 12 12 180 2 182 6 185 1 187 6 190 1 192 6 195 2 197 8 200 0 202 9 205 5 656 AIR CONDITIONING 4l BLOWER AND MOTOR See Fig 2 Removal and Disassembly 1 Remove fresh air control lever from shafts on either side of evaporator cover 2 Remove the evaporator housing rear cover mounting screws and lockwashers and re move cover 3 Disconnect main lead wire to blower motor and the thermal switch leads at the termi nal block mounting located at side of evap orator assembly 4 Remove the rubber grommet and pull wires through compartment Disconnect ground wire from compartment 5 Remove the six blower assembly mounting
47. r and moisture in system Too much refrigerant Remedies a Wash out condenser with warm water and compressed air from side next to engine b Discharge system refer to Paragraph 25 Evacuate and recharge system c Discharge until bubbles appear in sight glass then add Freon until bubbles disappear 57 SUCTION PRESSURE O K AND HIGH HEAD PRESSURE Possible Causes a Airin system b Too much refrigerant Remedies a Open gauge manifold discharge pressure valve slightly and leave open for 10 seconds to purge air Close valve start engine and recheck gauge pressures at 1200 rpm b Operate engine at 1200 rpm with blower switch turned to high Discharge Freon slowly through gauge manifold center fitting until bub bles appear in sight glass Charge system with Freon 12 as outlined in Paragraph 27 664 AIR CONDITIONING 58 LOW SUCTION PRESSURE HEAD PRESSURE O K Possible Causes a Blower not operating b Strainer drier plugged Expansion valve super heat setting too high Remedies a Test electrical circuit for continuity Re place faulty motor b Test strainer drier and replace if required as outlined in Paragraph 23 c Adjust super heat as outlined in Para graph 22 Replace valve if faulty 59 TESTING FOR LEAKS WITH LEAK DETECTOR For Diagnosis Where a system has been found to be low on Freon or following repairs on the system that CHRYSLER SERVICE MANUAL necessi
48. r is not damaged clean cyl inder block top and cylinder head thorough ly Be sure to remove all shreds left from old gaskets 9 Install the cylinder head bolts in the head 10 Place a piece of cardboard over the bolt heads and turn assembly upside down Lay on the bench with bolts facing up Handle new gaskets carefully as they are fragile Dip new gaskets in clean refrigeration oil 11 Place the cylinder head gasket then the valve plate and last the valve plate gasket over the bolts See Fig 11 12 Lift the cardboard turn assembly over and place the entire assembly carefully on the cylinder block and start bolts 13 Tighten bolts evenly from the center out to 20 foot pounds torque Bleed air from compressor and remove gauge set 36 COMPRESSOR SHAFT SEAL REPLACEMENT Two types of shaft seals have been used on the compressors for the Chrysler 1955 model air con ditioning equipped cars The early type seal has been superseded by the type now in production The replacement in the field of the new type seal for the old type includes the bearing and plate Replacement of the new type seal with a seal of the same type requires the seal only Preliminary Step for Removal of Seal 1 Start engine and operate at a fast idle with the temperature control switch at Cold and the blower switch set to High speed until compressor is warm and shut off engine 2 Remove valve stem protective caps fro
49. r unit shown in Figure 2 con tains an evaporator wherein the liquid refriger ant vaporizes due to the heat which it absorbs from the air passing over the evaporator tube fins This absorption of heat from the air results in a considerable reduction in the air tempera ture It is located in the luggage compartment and contains the expansion valve and evapora tor coil which is connected by tubing from the expansion valve to the compressor The unit also contains the motor and blower assembly 15 BLOWER SYSTEM The blower motor and fans are located in the evaporator The blower motor has three speeds low medium and high The speeds are controlled through the blower switch located on the instru ment panel 16 SOLENOID VALVE The solenoid valve is connected into a by pass line between the high pressure side of the com pressor and the inlet side of the evaporator at the distributor The normal position of the valve is open With the blower switch on and the tempera ture control switch in the position the valve is not electrically energized and is there fore open With the valve open gas flows through the by pass line and into the evaporator mixing with the liquid refrigerant from the expansion valve The amount of heat absorbed from the air by the evaporator is decreased and the tem perature of the car interior will be moderately cooled Rotation of the temperature control to the Cold position compl
50. re switch to Cold Operate for five to ten minutes to warm compressor and slow to 500 rpm 3 Close the suction service valve by rotating the valve stem using Tool C 3361 as shown in Figure 4 clockwise until it is tightly seated engine running at idle speed CAU TION Never shut off DISCHARGE service valve with engine running or the compres sor will be damaged Do not operate system with suction valve closed any longer than absolutely necessary 4 Observe the suction pressure on the com pound gauge The pressure reading on the gauge should drop steadily The pressure should drop to from 12 to 18 inches of vacuum if the suction valves are in good CHRYSLER SERVICE MANUAL condition If 12 to 18 inches of vacuum cannot be obtained check the suction service valve to be sure it is fully seated before condemning and replacing valve plate assembly 5 Shut off engine and watch the suction com pound gauge The vacuum should hold without dropping more than five inches within one minute if the discharge valve is in good condition 6 Return suction valve stem to full counter clockwise position then one turn clockwise 7 Replace valve plate assembly if tests do not meet these test conditions and refer to Paragraph 35 c Checking Freon Level 1 Connect a tachometer to the engine Start engine and adjust speed to 1200 rpm s 2 Turn the Blower control knob to High position and temperature co
51. rushes turn and undercut arm ature 92 BLOWERS AND COMPRESSOR OPERATING NO COOLING Possible Causes a Refrigerant low b Refrigeration system restricted c Compressor valves not functioning prop erly d Expansion valve faulty Remedies a Recharge system after testing and repair ing all leaks b Test strainer drier as outlined in Para graph 23 Test expansion valve Inspect lines for kinks Test compressor head pressures and valves d Test expansion valve as outlined in Para graph 23 Clean or replace valve 53 BLOWERS OPERATING PARTIAL COOLING Possible Causes a Refrigerant supply low b Expansion valve not functioning properly c Compressor operating above normal pres sure d Compressor valves faulty e Restricted condenser or discharge line f Thermal switch or solenoid valve in operative g Air passages through condenser blocked by bugs dirt mud or by bug screen h Improper refrigerant Remedies a Check sight glass for indication of low refrigerant Check for leaks and charge system CHRYSLER SERVICE MANUAL b Test expansion valve as outlined in Para graph 40 Clean adjust or replace as required c Follow test procedure and eliminate cause d Test valves as outlined in Paragraph 40 e Discharge system remove discharge line and inspect for restriction Replace or clean as required Inspect condenser for kinks or ob struction Clean with air or re
52. screws and lift assembly out of compart ment 6 Remove the eight blower housing mounting nuts and lockwashers and remove base plate from housing 7 Remove the eight blower motor mounting plate screws and lockwashers 8 Remove blower housings and note the dif ference between right and left housing for correct installation procedure 9 Use an Allen wrench to loosen the two blower fan set screws and remove the blower fans from shaft CAUTION Blower fans function as right and left and should be installed accordingly Always mark for iden tification before removal 10 Remove the six blower motor mounting screws and lockwashers and remove the two motor mounting plates Do not lose the grommets or spacers from the motor brackets as they are essential in maintain ing vibration free blower operation 11 Remove the four blower mounting brack et nuts and lockwashers and separate brackets from motor Motor location should be marked when removed so the motor can be reinstalled to rotate in the right direction CHRYSLER SERVICE MANUAL b Assembly and Installation 1 Place motor mounting brackets on motor and install the four lockwashers and nuts and tighten securely Install motor Make sure the motor rotates in right direction clockwise as viewed from left side of car 2 Inspect the six blower mounting grommets for deterioration and hardness and replace if necessary 3 Place the two mo
53. se any sort of sealing compound be tween the tube flare and the male surface c Securing of Tubing Tubing that is left free to vibrate and move about excessively will soon harden the area of the tube at the flared section so that it may become brittle and break It is very important that copper tubing be attached to the car struc ture Flexible connectors known as vibration eliminators have been placed on either side of the compressor to guard against tube breakage at that point d Brazing Joints Leaks at brazed joints may be repaired with a Prest o lite torch or an ordinary acetylene torch CAUTION Discharge system before using torch to braze leaking joints Care should be exercised to avoid excessive heat when using an acetylene flame to solder or braze a joint as excessive heat will cause dam age to tubing and fittings Silver solder flux should be put on the joint before starting the brazing operation When a joint is silver soldered or brazed clean the newly made joint vigorously with a stiff wire brush before leak testing the joint to make sure the joint is properly soldered or brazed Very often the flux will melt form ing a hard crust on the joint that is apparently leak tight until put in service when the slightest vibration breaks away the crust of the flux causing a leak The usual precautions should be followed before repairing a sweat type joint such as cleaning thoroughly applying sufficient fl
54. system it may be necessary to heat the drum to raise the drum pressure higher than the pressure in the system Use a pail of hot water no hotter than you can put your hand into to supply heat to the drum Never transport the charging drum in the passenger compartment as this can be done more safely in the trunk compartment 22 INSTALLING MANIFOLD GAUGE SET 1 Remove valve stem protective caps from compressor discharge and suction service valves 2 Using Tool C 3361 make sure both valves completely back seated counter clockwise CHRYSLER SERVICE MANUAL AIR CONDITIONING 637 VALVE STEM PROTECTIVE CAP 3 4 5 6 PORT CAP aee ga aiti 55 14816 Mi Fig 4 Suction Service Valve The normal operating position is then ro tated in a counter clockwise direction This position also isolates the service valve ports from the system pressure Remove the protective caps from both the discharge and service port caps Install the four foot test hose from the 600 pound gauge fitting on Tool C 3354 to the discharge service valve port fitting See Fig 3 Install the other four foot test hose from the 300 pound compound gauge fitting on Tool C 3354 to the suction service valve port fitting See Fig 4 Turn both valve handles of gauge set Tool C 3354 clockwise as far as they will go as this will completely seat valves and isolate gauge set manifold center outlet from
55. t The cooling of the air effected by the cooling coil is due to the evaporation of liquid refrigerant in the coil The completely vaporized refrigerant is then drawn back to the compressor thus completing the refrigeration cycle Control of the flow of refrigerant from the expansion valve to the evaporator is automatic The flow is controlled by spring tension suction manifold pressure and temperature The expan sion valve is pre set at the factory and is non adjustable The temperature control functions through a manually operated switch a solenoid by pass valve and a thermal switch The solenoid valve is normally open When the temperature control switch is turned to the cold position the solenoid is electrically energized and the valve is pulled closed This allows the system to operate at full capacity Turning the switch to the cool position breaks the circuit to the solenoid and the valve opens This allows hot vapors to flow from the compressor to the evaporator and moderates the cooling effect of the system A drop in the temperature of the suction pressure line to 30 degrees five degrees causes the thermal switch to open and breaks the circuit to the solenoid valve When the temperature again reaches 45 degrees five degrees the thermal switch closes Fundamentally the refrigerant which is cir culated through the system by the compressor picks up heat at the evaporator coil carries it to the condenser and ther
56. t for leaks after partial charge as outlined in Paragraph 24 8 Replace evaporator cover shield and fresh air levers The 1955 model Air Conditioning Ex pansion Valves are non adjustable 654 CONDITIONING CHRYSLER SERVICE MANUAL 40 TESTING EXPANSION VALVE OPERATION FOR PROPER SUPER HEAT The proper super heat should be 8 to 15 degrees F Before attempting to measure the super heat it is essential that all the components of the air conditioning system be functioning properly With the blowers condenser solenoid valve thermal switch strainer drier and compressor working properly and with the system charged with the proper amount of Freon 12 and oil at 100 F 800 Saybolt the following test and ad justment should be carefully followed Make sure the compressor discharge pressure does not exceed 275 psi The pressure will vary according to the ambient temperature On hot days an electric fan placed in front of the car will hold the pressure down while testing On cool days where the temperature is below 70 F it will be necessary to turn on the car heater adjust the heater control valve to the warmest position and close all windows The heat from the heater will warm up the temperature of air in the car interior and keep the thermal switch from operating before the reading the super heat is obtained Install thermometer clip Tool C 3421 on the suction tube fitting at evaporator outlet Be s
57. tated the opening of a connection it is necessary to test for leaks and tighten connec tions or make repairs as required before the sys tem is charged and put in operation If a system has been discharged for making repairs or to eliminate moisture the system must be evacu ated before partially charging for a leak test 1 Partially charge the system with Freon 12 as outlined in Charging the System with Freon 12 Paragraph 27 and proceed as follows This is necessary only where the Freon supply in the system is very low or where system has been evacuated 2 Operate engine at 1200 rpm with blower switch turned to High Discharge Freon slowly through gauge manifold center fit ting until bubbles appear in sight glass Charge system with Freon 12 as outlined in Paragraph 27
58. the system should be operated for ten minutes the engine shut down and the oil level checked and adjusted as outlined in Paragraph 14 from 3 to one inch if required Use a suction gun to remove oil if level is too high This procedure should be repeated several times until level remains at 34 to one inch CAUTION When working on the air conditioning system under pressure protect your eyes with goggles Tool C 3355 or glasses so no serious damage can result 32 MEASURING COMPRESSOR OIL LEVEL 1 Start engine and run at moderate speed air conditioning turned on until compres sor is warm This will automatically cause the compressor crankcase to become com paratively free of liquid refrigerant An oil sight glass is provided in the compressor CHRYSLER SERVICE MANUAL crankease so that the oil splash may be observed while the compressor is in opera tion If a splash is observed it indicates ONLY that there is oil in the compressor It does not tell you if there is TOO MUCH OR TOO LITTLE OIL To determine the oil level accurately it is necessary to measure it with a dip stick 2 Stop engine remove protective caps from discharge and suction valves Using Tool C 3361 close both valves by turning valve stems clockwise until they seat firmly CAU TION Never start engine with discharge valve closed and drive belts connected to engine when magnetic clutch is engaged 3 Clean dirt away from compressor oil filler
59. tor mounting plates into position on brackets and install the six screws and lockwashers tighten securely 4 Make sure spacers are inserted in the grom mets before assembly Make sure motor is installed with wire leads and drain wick located towards bottom of motor 5 Install the blower fans shaft that air will be forced out of outlet duct Vanes at bottom fan should point up and towards rear Refer to Fig 5 CAUTION Make sure blower fans are installed correctly otherwise car cooling will be affected 6 Place right and left blower housings over fans and install the eight mounting screws and lockwashers Tighten securely 7 Place base plate into position on blower housing and install the eight blower hous ing mounting nuts and lockwashers tight en securely 8 Position the blower fans as near as possi ble to outside portion of housing 9 Check position of set screws in relation to flat on the shaft and tighten securely Ro tate fans by hand to make sure there is no interference between fan and housing at any point when fans are rotated 10 Place blower assembly into position in evaporator compartment Install the mounting screws and tighten securely 11 Make sure ground wire terminal surface is clean install wire and tighten 12 Push blower motor lead wire and thermal switch leads through opening in compart ment and install rubber grommet CHRYSLER SERVICE MANUAL
60. ube to the discharge side 646 AIR CONDITIONING CHRYSLER SERVICE MANUAL 12 13 14 15 16 17 18 19 Insert hose or tube in a pail to receive flushing Reverse flush the system with carbon tet rachloride At least one gallon of the solu tion should be pumped through the system The pump used to reverse flush the system must be clean and capable of at least 50 pounds pressure Where no pump is avail able a 1954 type receiver may be used Fill the receiver with carbon tetrachloride Attach a jumper to one end of the receiver and to the suction pressure tube Attach air hose from dry air or nitrogen source to free end of receiver and turn on pressure Fill receiver and flush system at least twice Remove the mufflers from the old com pressor and reverse flush them with car bon tetrachloride and install mufflers on the new compressor using new gaskets Be sure to use new copper washers in the flared connections 20 21 22 Thoroughly clean the expansion valve in let screen and valve Install a new receiver strainer drier Install a new solenoid valve Install a clutch assembly on new compressor Lay the compressor flat on bench in hori zontal position Oil level in compressor should be at center of sight glass b Installing Compressor 1 2 3 4 Set new compressor with full factory oil level mufflers attached on the mounting bracket an
61. ure there is a good tight mechanical connection be tween the fitting and the thermometer clip Wrap a soft dry cloth around the suction tube fitting and thermometer bulb This will prevent the atmospheric temperature from reaching the thermometer bulb which would increase the temperature of the bulb and give an incorrect reading Observe compressor pressures They should be approximately the same as those shown in the chart according to the ambient temperature If the compressor head pressure is low then the air blast across the radiator and condenser should be altered until the proper head pressure is ob tained Moved further away Average Temperature Pressure Relationship At An Engine Speed Of 1200 rpm Ambient Temperature Discharge Pressure 60 F 100 150 80 F 140 190 100 F 190 240 110 F 230 280 After the thermometer reading and the head pressures have stabilized made a note of the in dicated readings and refer to the temperature pressure relation chart on Page 655 As there is approximately two pounds differential in the ob served reading at the suction gauge and that present at the position of the thermometer on the suction tube at the evaporator housing you must add two pounds to the observed reading on the suction gauge This differential in readings is due to internal friction in the tubes and this correction factor will give you the actual read ing at the thermometer position To obtain you
62. utch Assembly on Compressor Align key and keyway Push assembly over shaft and key Install self locking bolt and washer In stall upper right shroud section Back seat both service valves and tighten oil filler plug 38 REPLACING BRUSH ASSEMBLY 1 Remove the ground brush lead screw from the compressor 2 Disconnect the insulated lead Wade con nector u 3 Remove the two screws attaching brush holder to the compressor and remove brush holder assembly 4 Clean collector rings in clutch assembly with carbon tetrachloride and wipe the surplus grease from around clutch bearing 5 Install new brush holder assembly CAU TION Be careful not to break brushes If brushes are allowed to snap to the end of their travel they may break 39 EXPANSION VALVE REMOVAL AND INSTALLATION See Fig 2 a Removal To remove the valve for cleaning or replacement it is necessary to discharge the system as out lined in Paragraph 25 and proceed as follows 1 Remove fresh air levers and the evaporator rear cover 2 Loosen the expansion valve mounting clip from the distributor head flared nut 3 Disconnect the liquid tube and the equalizer tube 4 Remove the thermostatic capillary tube bulb from the suction tube well Save the two copper strips between the thermal bulb and the well The strips must be inserted with the bulb for proper thermal contact 5 Disconnect the exp
63. ux heating to a temperature that will cause the silver solder to flow freely and testing after repairing the joint 30 SERVICING THE COMPRESSOR The following component parts of the compres sor as shown in Figure 11 are available for service only compressor unit valve plate assem blies suction service valve cylinder head oil sight glass gaskets shaft seal and support brackets The compressor refrigerant oil may be re placed or corrected to the proper level Any damage to the pistons cylinders crank shaft or connecting rods requires replacement of the complete compressor assembly 31 REPLACING COMPRESSOR OIL LEVEL PRECAUTION New compressors are shipped fully equipped with the exception of the drive pulley and mag netic clutch assembly The compressors are charged with treated dry air to prevent air moisture or dirt from entering and contain 12 ounces of 300 Saybolt refrigerant oil Oil level at center of sight glass compressor lying hori zontal on bench When replacing a compressor for any reason it is imperative that the oil level in the com pressor be corrected to the proper amount Even though the oil compressor had no oil when removed some oil may still be in the rest of the system Where an old compressor is found to have no oil or where oil level is very low or too high the oil in the new compressor must be siphoned off to the minimum level of 34 inch After the installation is completed
64. with C 3354 8866 HOSE tTest with End Plugs 8 Feet Long use with C 3354 50802 ver BENDER SET For 14 546 9 9 46 l5 and 5 Tubes C 804 TOOL Tube Flaring 9n yr Dm CUTTER Tube 59429 SCALE Freon Weighing DUI TEST LAMP 19 SEAT PULLER and installing tool TIGHTENING REFERENCE The following parts should be tightened by means of an approved torque wrench to the limits speci fied below Foot Pounds Compressor Mounting Bracket to Compressor 85 Compressor Support Bracket to Compressor Bolts 30 Compressor Cylinder Head 20 Compressor Suction and Discharge 20 Compressor Pulley to Crankshaft Attaching Bolts 20 Compressor Front Bearing Retainer Bolts 15 Compressor Rear Bearing Retainer Bolts 15 Compressor Adaptor Plate Attaching 25 Compressor Sight Glass Plug 35 Compressor Muffler Mounting 20 Compressor Side Plate 2132592 02 dead eu eae nates dae Oe Hees ea 20 CHRYSLER SERVICE MANUAL 630 AIR CONDITIONING payoysuy 45 CXGG 4
65. ystem liquid refrigerant may splash and hit your face If the eyes are protected with goggles Tool C 3355 or glasses no serious damage may result If a splash of refrigerant does hit the eyes the eyes must not be rubbed Freon 12 is at least 20 degrees below zero a temperature that the eyes cannot normally withstand Apply cold water immediately to the area of the eye to gradually get the temperature above freezing point Use of an antiseptic oil is helpful as a protective film over the eye ball until medical aid can be obtained b Do Not Discharge in Areas Where An Open Flame Is Exposed Discharging large quantities of Freon 12 in an average size work room can usually be done safe ly as the vapor will produce no ill effect however this should never be done if the area contains an open flame such as a torch or gas heater Freon 12 normally is non poisonous Concentration of the gas in a live flame will produce poisonous gas Splashing Freon 12 on bright metal or chrome should be avoided as the gas will tarnish bright metal c Do Not Leave Charging Drum Uncapped Charging drums are shipped with a heavy pro tecting cap This cap is to protect valve and safety plug from damage Always replace cap after using charge drum d Do Not Expose Drum to High Temperature The drum should never be exposed to radiant heat or an open flame as the resultant pressure from such heat may cause the safety plug to blow out In charging the
66. ystem as outlined in Para graph 25 2 Disconnect discharge and by pass tubes from discharge valve and liquid line to re ceiver and cap tubes 3 Remove hood lock plate and support bracket 4 Remove four bolts that attach condenser brackets to radiator support and lift con denser from car b Installation 1 Position and install four attaching bolts in condenser brackets to radiator support Tighten bolts to 20 foot pounds torque 2 Remove caps from tubes and condenser if so equipped 3 Connect condenser to receive tube flared connection 4 Connect discharge and by pass tubes to discharge valve 5 Charge system with partial charge and test for leaks as outlined in Paragraphs 24 and 27 6 Correct any leaks and evacuate system Charge with four pounds of Freon 12 as outlined in Paragraph 27 Test system operation 44 RECEIVER FUSIBLE PLUG REPLACEMENT See Fig 23 Where it is found necessary to replace the fusi ble plug in the receiver dueto having been dam aged by a blow or because of melting from tem peratures exceeding 210 to 214 it is pos sible to do so without removing the receiver R STRAINER DRIER RECEIVE FUSIBLE PLUG E 54x590 Fig 23 Receiver Strainer Drier Installed 698 AIR CONDITIONING CHRYSLER SERVICE MANUAL Remove the old fusible plug after discharging system Apply refrigerant thread sealer to threads of new plug and i

CHRYSLER AIR CONDITIONING SYSTEM

Contents

Download Pdf Manuals

Related Search

Related Contents