928 S4 V8-4957cc 5.0L (1987)
Clutch Release Fork: Technical Service Bulletins
Clutch Release Arm and Bearing - Modification
Group
3
Number
9401
Model
8 Cyl.
Part Identifier
30
April 5, 1994
Subject:
Modification of the Clutch Release
Bearing and Release Bearing Arm
ATTENTION: Service Manager / Service Technician
Models Affected:
928 S4, 928 GT and 928 GTS, 1987-on
Concern:
Clutch chatter due to unfavorable tolerances.
General Information:
To improve clutch operation, the clutch release bearing area where the release bearing arm makes contact now has a crown (formerly flat) and the arm is
now flat (previously crowned). See Figure A. The new release arm and bearing were installed in production as of October, 1993, from VIN:
92 5RS 8201 11
Repair Information:
The new parts (release bearing, arm and guide sleeve) must be installed as a set. This set applies to cars as of M.Y. 1987. A mixing of the three parts
with the former versions is not permitted (see Figure A).
IMPORTANT:
For repairs to earlier cars from M.Y. 1987 to M.Y. 1993 up to VIN 92 4PS 820095, only the new release bearing and release arm are available. On first
time repairs to earlier cars, the new version guide sleeve must also be used. The outside diameter of the new guide sleeve is 31.8 mm (formerly 33.8
mm).
IMPORTANT:
DO NOT USE LUBRICATION on the sliding surfaces.
Installation:
