Chrysler PT Cruiser Service & Repair Manual page 1939

PT
HVAC HOUSING (Continued)
(1) Position the housing in the vehicle.
(2) Connect the wire harness connectors.
(3) Install the nut on the dash panel stud.
(4) Install the three retaining nuts on the engine
compartment studs.
(5) Snap the defrost duct in place.
(6) Connect the vacuum harness at the brake
booster.
(7) Connect the rubber drain tube to the extension.
(8) Install the expansion valve to the evaporator
(Refer to 24 - HEATING & AIR CONDITIONING/
PLUMBING/A/C EXPANSION VALVE - INSTALLA-
TION).
(9) Remove the protective caps and connect the
suction line to the expansion valve (Refer to 24 -
HEATING & AIR
SUCTION LINE - INSTALLATION).
(10) Position and install the coolant recovery con-
tainer.
(11) Install the instrument panel (Refer to 23 -
BODY/INSTRUMENT
PANEL ASSEMBLY - INSTALLATION)
(12) Refill the cooling system.
(13) Evacuate the refrigerant system (Refer to 24 -
HEATING & AIR CONDITIONING - STANDARD
PROCEDURE).
(14) Recharge the refrigerant system (Refer to 24 -
HEATING & AIR CONDITIONING - STANDARD
PROCEDURE).
A/C COMPRESSOR
DESCRIPTION
DESCRIPTION
The compressor (Fig. 39) used on this vehicle can
be one of two models, depending upon the transmis-
sion in the vehicle. Vehicles with a manual transmis-
sion use the Nippondenso 10S15 compressor, while
vehicles with an automatic transmission use the Nip-
pondenso 10S17 unit. These compressors use an alu-
minum swash plate, teflon coated pistons and
aluminum sleeveless cylinder walls. A high pressure
cut out switch is located on the back cover of the
compressor.
The compressor is secured to the lower front strut-
to-engine bracket with four screws. The lower front
strut-to-engine bracket is located on the lower, for-
ward skirt of the engine block which is located in the
right front corner of the engine compartment.
The compressor cannot be repaired. If faulty or
damaged, the entire compressor unit must be
replaced. The compressor clutch, pulley, clutch coil
and the high pressure cut out switch are available
for service replacement.
CONDITIONING/PLUMBING/
PANEL/INSTRUMENT
HEATING & AIR COND. - LHD
Fig. 39 Compressor
1 - A/C COMPRESSOR
2 - MOUNTING BOLTS
3 - LOWER FRONT STRUT-TO-ENGINE BRACKET
DESCRIPTION - COMPRESSOR FRONT SHAFT
SEAL
The compressor front shaft seal is not serviceable.
If a leak is detected at the shaft seal, the compressor
must be replaced as a unit.
OPERATION
The compressor is driven by the engine through an
electric clutch, drive pulley and belt arrangement.
The compressor is lubricated by refrigerant oil that is
circulated throughout the refrigerant system with the
refrigerant.
The compressor draws in low-pressure refrigerant
vapor from the evaporator through its suction port. It
then compresses the refrigerant into a high-pressure,
high-temperature refrigerant vapor. The compressor
pumps high-pressure refrigerant vapor to the con-
denser through the compressor discharge port.
DIAGNOSIS AND TESTING - COMPRESSOR
NOISE
Excessive noise while the A/C is being used, can be
caused by loose mounts, loose clutch, or high operat-
ing pressure. Verify compressor drive belt condition,
proper refrigerant charge and head pressure before
compressor repair is performed.
If the A/C drive belt slips at initial start-up, it does
not necessarily mean the compressor has failed.
With the close tolerances of a compressor it is pos-
sible to experience a temporary lockup. The longer
the A/C system is inactive, the more likely the condi-
tion to occur.
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