Achieva V6-3300 3.3L (1992)
Parking Brake Cable: Technical Service Bulletins
Brakes - Parking Brake Is Non-Adjustable Manual Revision
NUMBER:
92-U-66
CORP.REF.NO:
235014
DATE:
December 1992
SECTION:
5
SUBJECT:
PARKING BRAKE IS NON-ADJUSTABLE
MODELS/YEARS:
1992 ACHIEVA
This bulletin updates the Parking Brake adjustment procedure in the 1992 Achieva Service Manual Section 5, Pages 11-15. Please update your service
manual by making reference to this bulletin. The 1993 Achieva Service Manual contains this information in Section 5F.
Parking brake adjustment is not necessary. This is a self adjusting system and damage may result from attempting to adjust or modify this system in any
way. It may be necessary to adjust the rear brakes to obtain the proper tension in the system, refer to Section 5C, Page SC-4 at "BRAKE
ADJUSTMENT".
The effort required to fully apply this system is lower than that on previous foot operated systems. Heavy foot pressure can cause the lever to "bottom
out" (reach its full downward travel position). This does not indicate that the cable tension is low. The system has been designed to meet or exceed all
F.M.V.S.S. and General Motors requirements. The required cable tension is generated prior to the "bottom out" condition. The ability to "bottom out"
the lever under heavy foot pressure does not necessarily indicate a system deficiency.
DIAGNOSIS:
The park brake system can be checked for its ability to generate sufficient cable tension by performing the following steps:
1.
Check the drum brake clearance and reset if required. Refer to Section 5C.
2.
Fully apply and release the foot park brake lever 4 times.
3.
Apply lever to the 2 click position.
4.
Raise the car and suitably support. Refer to Section OA.
5.
Check park brake cable tension by attempting to turn right rear wheel with both hands. Wheel should only rotate backward, NOT forward.
6.
Release park brake and check for rear brake drag. Rear wheels should turn freely (some light shoe to drum contact may be heard).
7.
If excessive drag is felt, remove drum (refer to Section 5C) and check for the Parking Brake hanging up or binding.
8.
If sufficient tension is not obtained refer to Section SC for adjustment.
