With Duo Servo Brakes

For additional information see Notes, Warnings, and Hints. Fundamentals and Basics

Fig. 1 Exploded View Of Drum Brake Assembly.:

1. Lubricate parking brake lever fulcrum with suitable brake lube, then attach lever to brake shoe. Install washer and retaining ring.
2. Connect brake shoes with adjusting screw spring, then position adjusting screw. Ensure adjusting screw star wheel does not contact adjusting screw spring after installation, and also ensure RH thread adjusting screw is installed on left side of vehicle and LH thread adjusting screw is installed on right side of vehicle. When brake shoe installation is completed, ensure star wheel lines up with adjusting hole in backing plate.
3. Lightly lubricate backing plate shoe contact surfaces with suitable brake lube, then the area where parking brake cable contacts backing plate.
4. Install brake shoes on backing plate while engaging wheel cylinder links (if equipped) with shoe webbing. Connect parking brake cable to parking brake lever. The primary shoe (short lining) faces towards front of vehicle.
5. Install actuating levers, actuating link and return spring.
6. Install hold-down springs with suitable tool.
7. Install primary and secondary shoe return springs using brake spring pliers or equivalent.

Fig. 7 Measuring Brake Drum Inside Diameter:

Fig. 8 Adjusting Brake Shoes To Brake Drum Inside Diameter:

8. Using suitable brake drum to shoe gauge, Fig. 7, measure brake drum inside diameter. Adjust brake shoes to dimension obtained on outside portion of gauge, Fig. 8.
9. Install brake drum, wheel and tire assembly.
10. If any hydraulic connections have been opened, bleed brake system.
11. Adjust parking brake. See Brake Shoe / Adjustments. Adjustments
12. Inspect all hydraulic lines and connections for leakage, and repair as necessary.
13. Check master cylinder fluid level and replenish as necessary.
14. Check brake pedal for proper feel and return.
15. Lower vehicle and road test.

CAUTION: Do not severely apply brakes immediately after installation of new brake linings or permanent damage may occur to linings. Brakes must be applied moderately during first several hundred miles of operation to ensure proper burnishing of linings.