With Leading/Training Brakes

Exploded View Of Drum Brake Assembly.:

Exploded View Of Adjusting Screw Assembly:

1. Raise and support vehicle.
2. Remove wheel and tire assembly. Mark relationship of drum to axle flange.
3. Remove brake drum.
4. Using drum to brake shoe clearance gage tool No. J-21177-A or equivalent, measure brake drum inside diameter.
5. Turning the adjuster nut, adjust shoe and lining diameter to 0.254-0.508 mm (.010-.020 in), less than the inside drum diameter for each rear wheel.
6. Ensure stops on park brake levers are against the edge of the brake shoe web. If the parking brake cable is holding the stops off the edge of shoe web, loosen the parking brake cable adjustment.
7. Tighten parking brake cable at adjuster nut until the lever stops begin to move off the shoe webs. Loosen adjustment nut until the lever stops moving back, barely touching the shoe webs. There should be no more than 0.5 mm (0.019 in) clearance between stops and either web.
8. Install drums and wheels, aligning marks made previously.
9. Apply and release service brake pedal 30-35 times with normal pedal force. Pause approximately one second between pedal applications.
10. Depress parking brake six ratchet clicks. Rear wheels should not rotate.
11. Release parking brake and check for free wheel rotation.
12. Lower vehicle.