Jeep XJ. Manual - part 518
In addition, the flexible hose refrigerant lines should
be routed so they are at least 80 millimeters (3
inches) from the exhaust manifold.
High pressures are produced in the refrigerant sys-
tem when the air conditioning compressor is operat-
ing. Extreme care must be exercised to make sure
that each of the refrigerant system connections is
pressure-tight and leak free. It is a good practice to
inspect all flexible hose refrigerant lines at least once
a year to make sure they are in good condition and
properly routed.
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. See Refrigerant Recovery in this group for
the procedures.
(3) Unplug the wire harness connector from the
high pressure cut-off switch.
(4) Disconnect the discharge line refrigerant line
fitting from the condenser inlet tube (Fig. 56). See
Refrigerant Line Coupler in this group for the proce-
dures. Install plugs in, or tape over all of the opened
refrigerant line fittings.
(5) Remove the nut that secures the suction line
block fitting to the accumulator outlet. Install plugs
in, or tape over all of the opened refrigerant line fit-
tings.
(6) Remove the screw that secures the suction and
discharge line manifold to the compressor. Install
plugs in, or tape over all of the opened refrigerant
line fittings.
(7) Remove the suction and discharge line assem-
bly from the vehicle.
INSTALLATION
(1) Remove the tape or plugs from the suction and
discharge line manifold and the compressor. Install
the suction and discharge line manifold to the com-
pressor. Tighten the mounting screw to 28 N·m (250
in. lbs.).
(2) Remove the tape or plugs from the suction line
and the accumulator outlet block fittings. Install the
suction line to the accumulator outlet and tighten the
mounting nut to 9 N·m (80 in. lbs.).
(3) Remove the tape or plugs from the refrigerant
line fittings on the discharge line and the condenser
inlet tube. Connect the discharge line refrigerant line
coupler to the condenser inlet tube. See Refrigerant
Line Coupler in this group for the procedures.
(4) Plug in the wire harness connector to the high
pressure cut-off switch.
(5) Connect the battery negative cable.
(6) Evacuate the refrigerant system. See Refriger-
ant System Evacuate in this group for the proce-
dures.
(7) Charge the refrigerant system. See Refrigerant
System Charge in this group for the procedures.
VACUUM CHECK VALVE
(1) Unplug the heater-A/C vacuum supply line con-
nector at the vacuum check valve (Fig. 57).
(2) Note the orientation of the check valve in the
vacuum supply line for correct reinstallation.
(3) Unplug the vacuum check valve from the vac-
uum supply line fittings.
(4) Reverse the removal procedures to install.
Fig. 56 Suction and Discharge Line
1 – SUCTION AND DISCHARGE LINE
2 – SCREW
3 – COMPRESSOR
4 – CONDENSER
5 – INLET
6 – CLIP
7 – HEX NUT
8 – ACCUMULATOR
24 - 46
HEATING AND AIR CONDITIONING
XJ
REMOVAL AND INSTALLATION (Continued)