III-96
Repair Procedure:
After you locate the defective component containing the
restriction, recover all of the refrigerant. Replace the de-
fective component and the receiver-drier. Evacuate and
recharge the system with refrigerant, then check AC opera-
tion and performance.
Compressor Malfunction
Tip: The compressor may be noisy when it operates.
Cause: Defective reed valves or other compressor components. If
the compressor is not noisy, there may be a worn or loose
compressor clutch drive belt.
Repair Procedure:
If you find the belt worn or loose, replace or tighten it and
recheck system performance and gauge readings. To in-
spect and service the compressor, you must isolate (front
seat the stem type compressor service valves) and recover
refrigerant, or fully recover R-12 from systems containing
Schrader valves. Remove the compressor cylinder head
and check the appearance of the reed valve plate assembly.
If defective, replace the valve plate and install with new
gaskets, or replace the compressor assembly.
Manifold Gauge Set Readings
Figure 8-12
Gauge reading, compressor
malfunction.