Jeep 1996 Grand Cherokee Service Manual - page 1423
CLUTCH BREAK-IN
After a new compressor clutch has been installed,
cycle the compressor clutch approximately 20 times
(5 seconds on, then 5 seconds off). During this proce-
dure, set the heater-A/C control to the A/C (Recirc)
mode, the blower motor switch in the highest speed
position, and the engine speed at 1500 - 2000 rpm.
This procedure (burnishing) will seat the opposing
friction surfaces and provide a higher compressor
clutch torque capability.
HIGH PRESSURE CUT-OFF SWITCH
REMOVAL
(1) Disconnect and isolate the battery negative
cable.
(2) Unplug the wiring connector from the switch
(Fig. 23).
(3) Unscrew the switch from the discharge line fit-
ting.
INSTALLATION
(1) Install and tighten the switch.
(2) Plug the wiring connector into the switch.
(3) Connect the battery negative cable.
HIGH PRESSURE RELIEF VALVE
WARNING: REVIEW THE WARNINGS AND CAU-
TIONS IN THE FRONT OF THIS GROUP BEFORE
PERFORMING THE FOLLOWING OPERATION.
REMOVAL
(1) Disconnect and isolate the battery negative
cable.
(2) Recover the refrigerant from the refrigerant
system as described in this group.
(3) Turn
the
relief
valve
counterclockwise
to
remove it from the compressor manifold (Fig. 24).
(4) Either install a plug in, or tape over, the open
fitting on the compressor manifold.
INSTALLATION
(1) Remove the plug or tape from the compressor
manifold fitting.
(2) Install the high pressure relief valve in the
compressor manifold.
(3) Evacuate and charge the refrigerant system as
described in this group.
(4) Connect the battery negative cable.
CONDENSER
WARNING: REVIEW THE WARNINGS AND CAU-
TIONS IN THE FRONT OF THIS GROUP BEFORE
PERFORMING THE FOLLOWING OPERATION.
CAUTION: When removing the condenser note the
locations of all of the radiator and condenser air
seals. These seals are used to direct air through the
condenser and radiator. They must be installed in
their original locations to prevent engine overheat-
ing (Fig. 25).
Fig. 23 High Pressure Cut-Off Switch
Fig. 24 High Pressure Relief Valve
24 - 32
HEATING AND AIR CONDITIONING
ZJ
REMOVAL AND INSTALLATION (Continued)