Mitsubishi 3000GT 1991, Service Manual

Page: 1112 / 1146

HEATERS AND MANUAL AIR CONDITIONER
Compressor
Spring
Valve
ompressor
SERVICE POINT OF DISASSEMBLY
3. REMOVAL OF NUT
Use the special tool to loosen the
nut,
INSPECTION
l
Check the surface of the armature for scoring or bluing.
l
Check the surface of the rotor for scoring or bluing.
l
Check the sealing surfaces for cracks, scratches and
deformation.
Check the front housing for cracks or scoring on the sealing
surfaces.
l
Check the compressor shaft for scoring.
HIGH PRESSURE RELIEF VALVE CHECK
The high pressure relief valve is a safety feature which releases
part of the refrigerant inside the system into the atmosphere
when the high pressure level exceeds 3,550 (505 psi)
during air conditioner operation.
Once the pressure inside the system has been reduced to
2,400
(341 psi) or lower, the high pressure relief valve
closes, thus allowing continued operation.
(1) If a leak is detected at section A, replace the high pressure
relief valve. The valve can be used unless there is a leak
from that section.
(2) If a leak is detected at section B, retighten the valve. If the
leak still persists after retightening the valve, replace the
packing.
THERMOSTAT CHECK
Dip the thermostat in engine oil.
(2) Check for continuity across terminals and when the
engine oil is heated.
Standard value:
Continuity at approx. (230°F) or less
at A point
No continuity at approx. 155°C (311°F) or more
,
I
at B point
TSB Revision