Wheel Cylinder: Testing and Inspection

REAR DRUM BRAKE LINING AND REAR WHEEL CYLINDERS
1. Remove the brake drum and check the thickness of brake shoe lining for wear. Check the automatic brake adjusting system by hand to see if it operates smoothly. Also see if the gears are in proper mesh with each other. To assure smooth functioning, apply a very thin coat of grease to the friction surface of adjuster and link shaft.
2. Inspect the wheel cylinder boots for evidence of a brake fluid leaks. Visually check the boots for cuts, tears or heat cracks. (A small amount of fluid on the boot may not be a leak, but preservative fluid used at assembly.)

Limit:
Thickness of lining "B" 1.5 mm (0.059 in.)

For further information regarding this component and the system that it is a part of, please refer to Drum Brake System; Service and Repair.