Brake Shoe: Service and Repair
Removal1. Raise and support rear of vehicle, then remove wheel and tire assembly.
2. Remove brake drum. If brake drum cannot be removed easily, insert a suitable screwdriver through hole in backing plate, then push adjuster lever away from adjuster and back of adjustment tension.
3. Remove tension spring, using a suitable tool, then remove rear shoe hold-down spring and pin. Remove rear brake shoe and anchor spring, Fig. 7.
Fig. 7 Exploded View Of Type 4 Drum Brake Assembly.:
3. Proceed as follows:
a. Remove E-ring, then automatic adjusting lever and C-washer, then parking brake lever. Disconnect brake line from wheel cylinder using a suitable container to catch fluid.
b. Remove wheel cylinder. Remove following parts from wheel cylinder: two boots, two pistons, two pistons cups and spring.
4. Remove adjusting lever spring, then the adjuster from front shoe.
Installation
1. Proceed as follows:
a. Apply lithium soap base glycol grease to piston cups, pistons and boots.
b. Assemble and install wheel cylinder.
c. Connect brake line to cylinder.
2. Apply high temperature grease to following parts:
a. Backing plate and brake shoe contact points.
b. Anchor plate and brake shoe contact points.
c. Adjusting bolt.
d. Adjuster and brake shoe contact points.
3. Apply a suitable lubricant to adjuster bolt threads and end.
4. Assemble adjuster to lever, then install adjuster lever spring.
5. Position front shoe in place with end of shoe inserted into piston, then install shoe hold-down spring and pin using a suitable tool.
6. Assemble anchor spring to front and rear shoe, then install rear shoe with end inserted in piston.
7. Install rear shoe hold-down spring and pin, then the tension spring.
8. If necessary, adjust bellcrank as follows:
a. Lightly pull bellcrank in direction "A", Fig. 8, until there is no slack in part "B".
Fig. 10 Bellcrank Adjustment. Land Cruiser, Pickup & 4Runner 4WD:
b. Rotate adjusting bolt until dimension "C" is .016-.031 inch.
c. Lock adjusting bolt with locknut, when connect parking brake cable to bellcrank.
d. Install tension spring.
9. Ensure proper parking brake travel.
10. Pull adjusting lever cable upward, then release and ensure adjusting bolt rotates. If bolt does not rotate, check for improper installation of rear brakes.
11. Adjust strut to shortest possible length, then install drum.
12. Pull parking brake lever fully upward. Repeat process several times.
Fig. 5 Measuring Clearance Between Shoes & Drum:
13. Remove drum, then check for proper clearance, Fig. 4. Clearance should be .024 inch. If clearance is not as specified, check parking brake system.
14. Install brake drum, then bleed and refill brake system.
15. Install wheel and tire assembly, then lower vehicle.