Brake Shoe: Adjustments

Fig. 6 Release type brake adjuster:

These brakes have self-adjusting shoe mechanisms that assure correct lining-to-drum clearances at all times. The automatic adjusters operate only when the brakes are applied as the car is moving rearward.
Although the brakes are self-adjusting, an initial adjustment is necessary when the brake shoes have been relined or replaced, or when the length of the star wheel adjuster has been changed during some other service operation.

Frequent usage of an automatic transmission forward range to halt reverse vehicle motion may prevent the automatic adjusters from functioning, thereby inducing low pedal heights. Should low pedal heights be encountered, it is recommended that numerous forward and reverse stops be made until satisfactory pedal height is obtained. If a low pedal height condition cannot be corrected by making numerous reverse stops (provided the hydraulic system is free of air) it indicates that the self-adjusting mechanism is not functioning. Therefore, it will be necessary to remove the drum, clean, free up and lubricate the adjusting mechanism. Then adjust the brakes, being sure the parking brake is fully released.
1. Raise vehicle so wheels are free to turn, then remove rear adjusting hole cover.
2. Back off parking brake cable adjustment so there is slack in the cable. Ensure parking brake lever is fully released.
3. Insert adjusting tool into star wheel of adjusting screw. Move tool handle upward until slight drag is felt when wheel is rotated.
4. Insert a suitable screwdriver into brake adjusting hole and push adjusting lever out of engagement with star wheel. Care should be taken not to bend adjusting lever.
5. Back off star wheel until wheel rotates freely with no drag.
6. Install adjusting hole cover. Adjust brakes on remaining wheels in the same manner.
7. Adjust parking brake.