Chrysler Le Baron, Dodge Dynasty, Plymouth Acclaim. Manual — part 192
(5) Lubricate crankshaft seal seat cavity of front
housing with refrigeration oil.
(6) Lubricate crankshaft lip seal and seal O-ring
with refrigeration oil. Then install lip seal in front
cover using a socket that contacts the outer diameter
of the lip seal (Figs. 9 and 10).
(7) Install seal snap ring (Fig. 11).
(8) Lubricate front cover O-ring with refrigeration
oil and carefully place it in seal groove.
(9) Install lip seal protector on shaft (Fig. 12).
(10) Install front cover to front compressor body.
(11) Install compressor through-bolts and finger
tighten only. After bolts have been finger tightened,
torque to 29 N
Im (260 in. lbs.).
(12) Install felt shaft seal and retainer (Fig. 13)
into front housing.
Fig. 9 Match Socket to Outer Seal Diameter
Fig. 10 Installing Seal
Fig. 11 Seal Snap Ring
Fig. 7 Removing Seal
Fig. 8 Disassembling Compressor Front End
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HEATING AND AIR CONDITIONING
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CAUTION: Refer to Oil Level in the Refrigerant Ser-
vice Procedures section for further details.
(13) Install refrigeration oil (500 SUS) into the
compressor through the suction port.
(14) Check compressor operation for smoothness by
rotating crankshaft at least five full revolutions.
(15) Check front housing clutch coil alignment pin
for proper installation.
(16) Install clutch assembly.
(17) Install compressor.
(18) Evacuate and charge refrigerant system.
COMPRESSOR HIGH-PRESSURE RELIEF VALVE
The high pressure relief valve vents only a small
amount of refrigerant necessary to reduce system
pressure and then reseats itself. The majority of the
refrigerant is conserved in the system. The valve is
calibrated to vent at a pressure of 3100 to 4140 Kpa
(450 to 600 psi). If a valve has vented a small
amount of refrigerant, it does not necessarily mean
the valve is defective.
(HPR) VALVE LOCATION
The HPR Valve is located on the discharge line at
the A/C compressor (Fig. 14).
REMOVAL AND INSTALLATION
(1) Using a refrigerant recovery machine, remove
the refrigerant from the A/C system.
(2) Rotate the high pressure relief valve counterclock-
wise and separate relief valve from the vehicle (Fig. 15).
To install, Reverse the preceding operation using a
new O-ring seal. Evacuate and charge the refrigerant
system.
REFRIGERANT SYSTEM DIAGNOSIS
Refer to the Refrigerant System Diagnosis chart in
this section.
Fig. 13 Felt Retainer and Felt
Fig. 14 High Pressure Relief Valve— Typical
Fig. 15 High Pressure Relief Valve—Typical
Fig. 12 Installing Lip Seal Protector
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HEATING AND AIR CONDITIONING
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REFRIGERANT SYSTEM DIAGNOSIS
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HEATING AND AIR CONDITIONING
24 - 31
FIXED DISPLACEMENT COMPRESSOR—MODEL TR105
INDEX
page
page
Compressor
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Compressor Clutch/Coil Assembly
. . . . . . . . . . . . 32
Compressor Shaft Bearing/Seal
. . . . . . . . . . . . . . 35
Refrigerant System Diagnosis
. . . . . . . . . . . . . . . 36
Thermal Limiter Switch
. . . . . . . . . . . . . . . . . . . . 34
COMPRESSOR
Cleanliness is extremely important when disassem-
bly of the compressor is necessary. The surfaces
around the suction and discharge ports of the com-
pressor should be cleaned thoroughly before opening
the system at these points. If compressor is removed
from vehicle, apply tape to the opened ports to pre-
vent any contamination.
REMOVAL
(1) Disconnect battery negative cable.
(2) Loosen and remove drive belts (refer to Group
7, Cooling System).
(3) Disconnect compressor clutch wire lead.
(4) Using a refrigerant recovery machine, remove
refrigerant from the A/C system.
(5) Remove refrigerant lines from compressor.
(6) Remove compressor attaching bolts.
(7) Remove compressor.
INSTALLATION
(1) Position the compressor on the mount and fit
drive belt.
(2) Tighten the compressor attaching bolts to 41
N
Im (30 ft. lbs.) torque.
(3) Adjust drive belt (see Group 7, Cooling Sys-
tem).
(4) Install refrigerant hoses.
(5) Connect the clutch wire.
(6) Evacuate and charge the system.
(7) Connect the battery negative cable.
COMPRESSOR CLUTCH/COIL ASSEMBLY
CLUTCH INOPERATIVE
The air conditioning compressor clutch electrical
circuit is controlled by the engine controller. The
controller is located in the engine compartment out-
board of the battery.
If the compressor clutch does not engage:
Verify refrigerant charge.
If the compressor clutch still does not engage check
for battery voltage at the low pressure or differential
pressure cut-off switch located on the expansion
valve. If voltage is not detected, refer to:
• Group 8W, Wiring Diagrams.
• The appropriate Powertrain Diagnostic Procedures
Manual for diagnostic information.
If voltage is detected at the cut-off switch, recon-
nect switch. Then check for battery voltage between
the compressor clutch connector terminals.
If voltage is detected, perform A/C Clutch Coil
Tests.
CLUTCH COIL TESTS
(1) Verify battery state of charge. (Test indicator
in battery should be green).
(2) Connect an ammeter (0-10 ampere scale) in se-
ries with the clutch coil terminal. Use a volt meter
(0-20 volt scale) with clip leads measuring voltage
across the battery and A/C clutch.
(3) With A/C control in A/C mode and blower at
low speed, start the engine and run at normal idle.
(4) The A/C clutch should engage immediately and
the clutch voltage should be within two volts of the
battery voltage. If the A/C clutch does not engage,
test the fusible link.
(5) The A/C clutch coil is acceptable if the current
draw is 2.0 to 3.7 amperes at 11.5-12.5 volts at clutch
coil. This is with the work area temperature at 21°C
(70°F). If voltage is more than 12.5 volts, add electri-
cal loads by turning on electrical accessories until
voltage reads below 12.5 volts.
If coil current reads zero, the coil is open and
should be replaced. If the ammeter reading is 4 am-
peres or more, the coil is shorted and should be re-
placed. If the coil voltage is not within two volts of
the battery voltage, test clutch coil feed circuit for
excessive voltage drop.
REMOVAL
(1) Remove the compressor from the mount.
(2) To prevent compressor shaft rotation, install 2
(6 mm) bolts, along with 2 wrenches, to the threaded
holes in the armature plate (Fig. 1). Remove com-
pressor shaft nut.
(3) Tap the armature plate with a plastic and re-
move plate and shim(s).
CAUTION: Do not use screwdrivers between the ar-
mature plate assembly and rotor-pulley to remove
the armature plate. This may damage the armature
plate assembly.
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