Conquest TSI L4-2555cc 2.6L SOHC Turbo (1986)
Compressor Pulley: All Technical Service Bulletins
A/C Compressor Clutch - Repeat Failures
Models
1985 & 1986 Domestic Vehicles
Subject
A/C Clutch Failure
Index
AIR CONDITIONING
Date
June 2, 1986
No.
24-02-86
P-2031
This bulletin is issued to clarify the application of the A/C clutch and pulley, and supply additional diagnostic information on A/C clutch failures. There
are two types of clutches and pulleys available for service. The new style "stepped" pulley is to be used ONLY with the new style "stepped" clutch coil
assembly.
SYMPTOM/CONDITION
Repeat failure of the air conditioning clutch and pulley assembly. The failure will appear to be a burned out condition that occurs for no apparent reason,
after all specifications were correct at the time of installation. The clutch contact area will generally have a bluish or burned metal appearance, with no
indication of compressor shaft seal oil leakage.
CORRECTIVE ACTION
Carefully inspect the FAILED pulley assembly prior to discarding it, to verify that it is either a "stepped" or "nonstepped" pulley assembly. If the pulley
assembly is a "stepped" pulley, it should have had a "stepped" clutch coil assembly installed behind it.
If inspection reveals that a "stepped" pulley assembly has been installed over a "non-stepped" clutch coil assembly, this is probably what caused the
failure.
The IMPROVED STEPPED CLUTCH AND COIL design was developed to increase the application pressure and reduce slipping of the A/C clutch
when it is engaged. Using the "stepped" clutch assembly with the "non-stepped" clutch coil reduces the clutch apply pressure which causes the assembly
to fail.
