Chrysler PT Cruiser Service & Repair Manual page 1924

24 - 18 HEATING & AIR COND. - LHD
A/C COMPRESSOR CLUTCH COIL (Continued)
NOTE: Shims may compress after tightening shaft
nut. Check air gap in four or more places to verify if
air gap is still correct. Spin pulley for final check.
(9) Install the compressor on the engine(Refer to
24 - HEATING & AIR CONDITIONING/PLUMBING/
A/C COMPRESSOR - INSTALLATION).
CLUTCH BREAK-IN
After new clutch installation, cycle the A/C clutch
20 times (5 seconds on and 5 seconds off). During
this procedure, set the system to the A/C mode,
engine rpm at 1500 - 2000, and high blower speed.
This procedure (burnishing) will seat the opposing
friction surfaces and provide a higher clutch torque
capability.
A/C HIGH PRESSURE SWITCH
DESCRIPTION
The high pressure cut out switch is located on the
rear of the compressor. It turns off the compressor if
the system pressure exceeds 3240 kPa (470 psi). The
high pressure cut out switch is a factory calibrated
unit. The switch cannot be adjusted or repaired and
if faulty or damaged, it must be replaced.
REMOVAL
WARNING: THE
REMOVED FROM THE SYSTEM BEFORE REMOV-
ING THE HIGH PRESSURE CUT OUT SWITCH.
(1) Recover refrigerant from A/C system (Refer to
24 - HEATING & AIR CONDITIONING - STAN-
DARD PROCEDURE).
(2) Disconnect and isolate the battery negative
cable.
(3) Raise and support the vehicle.
(4) Disconnect the engine wire harness connector
from the high pressure cut out switch on the com-
pressor back cover (Fig. 16).
(5) Using snap ring pliers, remove the internal
snap ring that secures the high pressure cut out
switch to the switch port in the compressor back
cover.
(6) Pull the high pressure cut out switch out of the
compressor back cover.
(7) Install a plug in or tape over the opened switch
port on the compressor back cover.
(8) Remove the rubber O-ring seal from the high
pressure cut out switch and discard.
REFRIGERANT MUST
Fig. 16 High Pressure Cut Out Switch Location
1 - DISCHARGE LINE
2 - A/C COMPRESSOR
3 - HIGH PRESSURE CUT OUT SWITCH
4 - SUCTION LINE
INSTALLATION
WARNING: THE
REMOVED FROM THE SYSTEM BEFORE REMOV-
ING THE HIGH PRESSURE CUT OUT SWITCH.
(1) Clean any foreign matter from the switch
BE
mounting bore
(2) Install the high pressure cutout switch with a
new O-ring. Use only the specified O-rings as they
are made of a special material for the R-134a system.
Use only refrigerant oil of the type recommended for
the compressor in the vehicle.
(3) Remove the tape or plug from the switch port
on the compressor back cover.
(4) Insert the high pressure cut out switch into the
switch port on the compressor back cover.
(5) Reconnect the engine wire harness connector to
the high pressure cut out switch on the compressor
back cover..
(6) Lower the vehicle.
(7) Reconnect the battery negative cable.
(8) Evacuate the refrigerant system (Refer to 24 -
HEATING & AIR CONDITIONING - STANDARD
PROCEDURE).
(9) Recharge the A/C system (Refer to 24 - HEAT-
ING & AIR CONDITIONING - STANDARD PROCE-
DURE).
REFRIGERANT MUST
PT
BE