Brake Shoe: Service and Repair

REMOVAL

Fig. 1 Drum Brake Assembly:

1. Raise and support vehicle, then remove wheel and tire assembly.
2. Remove brake drum, then inspect wheel cylinders for signs of leakage. If evidence of leakage is present, service cylinders as necessary.
3. Install brake cylinder clamp D81L-1103-B over ends of wheel cylinder, then contract brake shoes as follows:
a. Disengage adjusting lever from adjusting screw by pulling backward on adjusting lever cable, Fig. 1, then move outward side of adjusting screw upward until pivot nut is backed off as far as it will go.
4. Pull adjusting lever, cable, and automatic adjuster spring down and toward rear to unhook pivot hook from large hole in secondary shoe web. Do not pry pivot hook out of hole.
5. Remove automatic adjuster spring and adjusting lever. Note color and position of each spring for proper assembly.
6. Using a brake spring removal/installation tool, remove secondary shoe to anchor spring, then the primary shoe to anchor spring.
7. Unhook cable anchor and remove anchor pin plate, if equipped.
8. Remove cable guide from secondary shoe, then the shoe hold-down springs, shoes, adjusting screw, pivot nut, and socket. Note color and position of each hold down spring for proper assembly.
9. Remove parking brake link and spring, then disconnect parking brake cable from parking brake lever.
10. Remove secondary shoe and disassemble parking brake lever from shoe by removing retaining clip and spring washer, if equipped.

INSTALLATION
1. Assemble parking brake lever on secondary shoe and secure with spring washer and retaining clip.
2. Apply light coating of suitable lubricant at points where brake shoes contact backing plate.
3. Position brake shoes on backing plate, then install hold down spring pins, springs, and cups.
4. Install parking brake link, spring, and washer, then connect parking brake cable to parking brake lever.
5. Install anchor pin plate, if equipped, then place cable anchor over anchor pin with crimped side facing backing plate.
6. Install primary shoe to anchor spring.
7. Install cable guide on secondary shoe with flanged hole fitted into hole in secondary shoe, then thread cable around cable guide groove. Ensure that cable is positioned in groove and not between guide and shoe web.
8. Install secondary shoe to anchor spring. Ensure that all parts lay flat on anchor pin.
9. Remove clamp from wheel cylinder.
10. Apply suitable lubricant to threads and socket end of adjusting screw, turn adjusting screw into adjusting pivot nut to end of threads and back off 1/2 turn, then place adjusting socket on screw and install assembly between shoe ends with adjusting screw nearest secondary shoe.
11. Hook cable hook into hole in adjusting lever from outboard plate side.
12. Place hooked end of adjuster spring in large hole in primary shoe web and connect looped end of spring to adjuster lever hole.
13. Pull adjuster lever, cable, and automatic adjuster spring down toward rear to engage pivot hook in large hole in secondary shoe web, then ensure that adjusting mechanism works properly.
14. Install brake drum, then the wheel and tire assembly.
15. Adjust brakes and, perform brake bleeding procedures if necessary.
16. Lower vehicle and road test.