Subaru XT 1988 Service Manual page 1059

AIR CONDITIONING SYSTEM
4-7
Evaporator
REMOVAL AND INSTALLATION
1) Disconnect battery negative terminal.
2)
Discharge refrigerant.
3) Disconnect discharge pipe, suction pipe and grommets.
/
~
~
Discharge pipe
~
(high-pressure) \
Fig. 76
4)
5)
Remove under cover trim.
Remove pocket ASSY.
6) Disconnect wiring harness from evaporator thermostat.
7) After removing two bands, remove evaporator.
8)
Install the evaporator in the reverse order of removal.
When installing the evaporator in the car body, make sure the
wiring harness and vacuum hose do not get caught between the
body parts.
DISASSEMBLY & ASSEMBLY
1)
Using a flat-bladed screwdriver, remove the eight clamps
and the evaporator upper case.
L4-523
Fig. 77
2) Remove lower case from evaporator.
3)
Remove the component parts from evaporator.
(1)
Thermostat
(2) Disconnect the connection between the expansion
valve and pipe from receiver drier.
(3) Remove the expansion valve from the header pipe.
Expansion valve
L4-524
Fig. 78
4)
Check to see if the evaporator fins are clogged. If they
are, clean them with compressed air.
Water must never be used to clean the evaporator.
5)
Check parts that have been removed for cracks or
scratches, and repair or replace them with new ones, if neces-
sary.
6)
Reassemble the evaporator in the reverse order of dis-
assembly. Observe the following points during the reassembly
process:
(1) Confirm that the O-ring is inserted in the specified
position.
(2)
Tightening torque
Tightening torque:
37
Expansion valve's mounting nut
2.5 - 4.4 N·m (0.25 - 0.45
kg-m,
1.8 - 3.3
ft-Ib)
Discharger pipe union nut
10 - 20 N'm (1.0 - 2.0 kg-m, 7 - 14 ft-Ib)
Nut on discharge side
10 - 20 N·m (1.0 - 2.0
kg-m,
7 - 14
ft-Ib)
Nut on suction side
20 - 29 N'm (2.0 - 3.0 kg-m, 14 - 22 ft-Ib)