K 2500 Truck 4WD V8-379 6.2L DSL VIN C FI (1989)
Brake Shoe: Adjustments
With Duo Servo Brakes
Fig. 1 Exploded View Of Drum Brake Assembly.
1. Using a suitable punch, knock out lanced area in backing plate or drum. If drum is installed on vehicle when this is done, remove drum and clean
brake compartment of all metal.
NOTICE: When adjustment is completed, a new hole cover must be installed in the backing plate.
2. Using suitable tool, turn brake adjusting screw to expand brake shoes at each wheel until wheel can just be turned by hand. Drag should be equal
on all wheels.
3. Back off adjusting screw at each wheel 33 notches.
NOTICE: Brakes should have no drag after the screw has been backed off about 15 notches. If a heavy drag is present check the parking brake
cable for free operation. The brake lever must return to the released position without sticking or binding.
4. Install adjusting hole cover in brake backing plate.
5. Check parking brake for proper adjustment.
