Subaru 2009 IMPREZA Service Manual page 2714

HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
14.Compressor
A: REMOVAL
1) Perform compressor oil return operation. <Ref.
to AC-26, PROCEDURE, Compressor Oil.>
2) Turn the A/C switch to OFF and stop the engine.
3) Using the refrigerant recovery system, dis-
charge refrigerant. <Ref. to AC-21, PROCEDURE,
Refrigerant Recovery Procedure.>
4) Disconnect the ground cable from battery.
5) Remove the V-belts. <Ref. to ME(H4DOTC)-40,
REMOVAL, V-belt.> <Ref. to ME(H4SO)-39, RE-
MOVAL, V-belt.>
6) Remove the generator. <Ref. to SC(H4SO)-16,
REMOVAL, Generator.>
7) Remove the bolt and remove the low-pressure
hose and high-pressure hose.
8) Disconnect the compressor harness from body
harness.
9) Remove the bolts and remove the compressor
bracket.
Compressor
10) Remove the bolts, then remove the bracket
from the compressor.
B: INSTALLATION
1) Install in the reverse order of removal.
2) Replace the O-rings on low-/high-pressure hos-
es with new parts, then apply compressor oil.
3) After replacing the compressor, adjust the
amount of compressor oil. <Ref. to AC-26, PRO-
CEDURE, Compressor Oil.>
4) Charge refrigerant. <Ref. to AC-22, PROCE-
DURE, Refrigerant Charging Procedure.>
Tightening torque:
Refer to "COMPONENT" of "General Descrip-
tion". <Ref. to AC-11, AIR CONDITIONING
UNIT, COMPONENT, General Description.>
<Ref. to AC-12, COMPRESSOR, COMPO-
AC-01739
NENT, General Description.>
C: INSPECTION
1. MAGNETIC CLUTCH CLEARANCE
1) Check the clearance of the entire circumference
around the drive plate and pulley.
Specification:
0.3 — 0.6 mm (0.0118 — 0.0236 in)
2) If it is not at the standard value, replace the com-
pressor.
2. MAGNETIC CLUTCH OPERATION
1) Disconnect the compressor connector.
2) Connect the battery positive (+) terminal to the
terminal of the compressor connector.
3) Check the magnet clutch engagement.
4) If there is a malfunction, replace the compressor.
AC-01740
AC-34
AC-01741