Brakes - Drum Adjustment Hole Plug
88cadillac10Bulletin No. T-89-6
File in Group 5
Number 27
Corp. Ref. No. 835006R
Date Sept. 1988
SUBJECT: BRAKE DRUM ADJUSTMENT HOLE PLUG REMOVAL
MODELS AFFECTED: 1987-1988 CIMARRONS
Some rear brake drum adjusting hole plugs cannot be removed using a punch because of insufficient die piercing. On drums where a punch will not work, the hole plug can be removed using the following procedure:
1. Remove the rear wheel and reinstall two lug nuts backwards to hold drum in place against rear wheel bearing.
2. Locate an accessible adjusting hole plug (select a plug not covered with a balance weight).
3. Position the adjuster hole plug on the left hand drum at 10:00 or on the right hand drum at 3:00 and set the park brake.
4. Prick punch four spots within the hole plug outline.
5. Drill four 6 mm (1/4") diameter holes within the hole plug outline.
6. File the hole opening as necessary to insert a brake adjusting tool.
7. Install rubber adjusting hole cover, P/N 5464803 or equivalent, into adjusting hole to prevent dirt or contamination from entering drum brake assembly.
For warranty purposes use Labor Operation T1318 at .3 hour.