On-Vehicle Service

CAUTION: Keep fingers away from rear brake shoe springs to prevent fingers from being pinched between spring and shoe web or spring and backing plate.

NOTICE: Do not pry against the splash shield or backing plate in attempt to free the drum. This will bend the splash shield or backing plate. A bent backing plate may cause brake chatter and/or pulsation.

NOTICE: Do not over stretch the Adjuster spring. Damage can occur if the spring is over stretched.

Clean
- Dirt and foreign material around wheel cylinder inlet, pilot and bleeder valve.

REMOVE OR DISCONNECT
1. Shoes and linings.
2. Bleeder valve.
3. Brake pipe inlet tube nut and brake line.
- Plug opening in line to prevent brake fluid loss and contamination.
4. Wheel cylinder mounting bolts.
5. Wheel cylinder.

Clean
- Old sealant from backing plate where wheel cylinder was installed. Also clean sealant from wheel cylinder if it is to be reused.

INSTALL OR CONNECT

NOTICE: Always use the correct fastener in the proper location. When you replace a fastener, use ONLY the exact part number for that application. the manufacturer will call out those fasteners that require a replacement after removal. The manufacturer will also call out the fasteners that require thread lockers or thread sealant. UNLESS OTHERWISE SPECIFIED, do not use supplemental coatings (paints, greases, or other corrosion inhibitors) on threaded fasteners or fastener joint interfaces. Generally, such coatings adversely affect the fastener torque and the joint clamping force, and may damage the fastener. When you install fasteners, use the correct tightening sequence and specifications. Following these instructions can help you avoid damage to parts and systems.

1. Apply Loctite(R) or equivalent to the wheel cylinder shoulder face that contacts backing plate.
2. Position wheel cylinder and hold in place.
3. Wheel cylinder mounting bolts.
- Tighten bolts to 12 Nm (110 inch lbs.).
4. Brake pipe inlet tube nut.
- Remove plug to brake line.
- Tighten nut to 17 Nm (12 ft. lbs.).
5. Bleeder valve.
- Tighten valve to 7 Nm (62 inch lbs.).
6. Bleed wheel cylinder.
7. Shoes and linings.