Brake Shoe: Service and Repair

Fig. 2 Loosening Drum Through Splash Shield:

Fig. 3 Actuator Spring Removal:

Fig. 4 Retractor Spring Disengagement:

REMOVAL
1. Raise and support vehicle.
2. Mark relationship of wheel to axle, then remove wheel and tire assembly.
3. Remove brake drum. If drum is difficult to remove, proceed as follows:
a. Ensure parking brake is released.
b. Back off parking brake cable adjustment.
c. Remove access hole plug from backing plate, insert screwdriver through hole and push parking brake lever off its stop.
d. Insert punch through hole in splash shield Fig. 2, tap on punch to loosen drum. Then remove drum.
4. Remove actuator spring using special brake tool J 38400 or equivalent to pry loop end of spring from adjuster actuator, Fig. 3. When removing the retractor spring do not over stretch the spring, this will reduce its effectiveness.
5. Remove end of retractor spring from adjuster shoe and lining assembly using special brake tool J 38400 or equivalent, Fig. 4. Keep finger away from retractor spring to prevent fingers from being pinched.
6. Remove adjuster shoe and lining assembly, adjuster actuator, then adjusting screw assembly.
7. Remove park brake lever from shoe assembly, do not remove parking brake cable from lever unless parking brake lever is being replaced.
8. Remove retractor spring from park brake shoe and lining.
9. Pry end of retractor spring toward axle using special brake tool J 38400 or equivalent, until it snap off shoe web onto backing plate. Remove park brake shoe.

Fig. 6 Spring End Installation Into Shoe Slot:

Fig. 7 Shoe Spreading To Install Adjuster Actuator:

INSTALLATION
1. Lubricate raised shoe pads on backing plate, anchor surfaces on backing plate, and adjuster screw threads using brake lubricant No. 1052196 or equivalent.
2. Install retractor spring if removed by hooking center spring section under tab on anchor.
3. Install park shoe and lining assembly as follows:
a. Place shoe on backing plate.
b. Using special brake tool J 38400 or equivalent, pull end of retractor spring up to rest on web of brake shoe, Fig. 5.
c. Using special brake tool J 38400 or equivalent, pull end of retractor spring over until if locks into slot of brake shoe, Fig. 6.
4. Install park brake lever.
5. Install adjuster screw and adjuster shoe as follows:
a. Place shoe on backing plate.
b. Using special brake tool J 38400 or equivalent, pull end of retractor spring up to rest on web of brake shoe.
c. Using special brake tool J 38400 or equivalent, pull end of retractor spring over until if locks into slot of brake shoe.
6. Install adjuster actuator by spreading shoes using special brake tool J 38400 or equivalent, Fig. 6. Then install adjuster actuator.
7. Install actuator spring.
8. Adjust brakes using suitable adjustment tool. Lining diameter should be 0.050 inches less than inside diameter of each drum.
9. Install drums, wheels and tires, aligning marks made during removal.