CAMPAIGN: PARKING BRAKE LEVER (CABLE ADJUSTMENT PROCEDURE)
Subject: PARKING BRAKE LEVER ASSEMBLY
Models/Years: CERTAIN 1991 NINETY EIGHT AND 1992 EIGHTY EIGHT MODELS
This bulletin supplements Product Campaign Bulletin 92-C-02, dated October 1991, to correct steps 15 through 18 under Parking Brake Cable Adjustment in the Service Procedure section of the bulletin.
The back page of this bulletin is to be pasted over page 5 of Oldsmobile Product Campaign Bulletin 92-C-02. This page has the holes punched on the right to facilitate the "paste-up".
Page 5 Revised:
13. Enable the SIR system. Refer to SUPPLEMENTAL INFLATABLE RESTRAINT, page 9J-A-3 of the 1991 Ninety Eight or 1992 Eighty Eight Service Manual. Reconnect the SIR inflator module circuit by connecting the YELLOW connector at the base of the steering column. Then reinstall the left lower I/P sound insulator.
14. With the ignition in the off position, reconnect the negative battery cable. If a memory retention device was not used, please reset (to the extent possible) all devices that lost their memory after the battery was disconnected.
Parking Brake Cable Adjustment:
1. Raise vehicle and suitably support (Refer to Service Manual section OA).
2. Mark relationship of rear wheel to wheel studs in bearing flange.
3. Remove rear wheel and tire assemblies.
4. Mark relationship of rear drum to wheel studs in bearing flange.
5. Remove brake drums.
6. Make sure the lever stops (1 6, Figure 4) on both park brake levers (i 2) are against edges of shoe webs on park brake shoes (1 1). If park brake cable is holding stops off the edge of the show web, loosen the park brake cable adjustment.
7. Measure the inside diameter (ID) of the drum using J 21177-A or J 22364-01.
8. Turning the star wheel on the adjusting screw assembly (15), adjust the shoe and lining diameter to be 1.27 mm (0.050 in.) less than inside drum diameter for each rear wheel.
9. Install drums, wheel and tire assemblies, aligning marks made at removal. Install wheel nuts finger tight.
10. Lower Vehicle.
11. Using a star pattern, torque wheel nuts to 140 N.m (100 lb. ft.).
12. Apply and release service brake pedal 30 to 35 times with normal pedal force. Pause about one (1) second between pedal applies.
13. Apply and release parking brake five (5) times to ten (10) clicks.
14. Check parking brake pedal for full release by turning ignition to "ON" and checking the "BRAKE" indicator light. The light should be off. If the light is on and the brake appears to be released, operate pedal release lever and pull downward on the front parking brake cable to remove slack.
15. Raise vehicle and suitably support.
16. Remove access hole plug in rear brake backing plates.
17. Adjust parking brake cable until a 1/8-inch drill bit can be inserted through access hole in space between shoe web (i 1) and park brake lever (1 2). Refer to Figure 2. Satisfactory cable adjustment is achieved when a 1/8-inch drill bit will fit into the space, but a 1/4-inch drill bit will not.
18. Apply park brake to four clicks. The wheel should not move when one attempts to rotate it (by hand) in a forward direction. The wheel should drag or not move when attempting to rotate in a rearward direction.
General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.
