Brake Drum: Service and Repair

NOTE: Remove rear wheel.





Procedures
- Unscrew handbrake cables on parking-brake lever. Unscrew bolt (1) and take off brake drum (2).





NOTE: If the brake drum cannot be removed, locate one wheel stud bore approx. 80° off the vertical axis.





- Insert screwdriver in bore and push back handbrake lever.





- If it is still not possible to take off brake drum, brake shoes will have to be pushed back.
- Locate one wheel stud bore in position approx. 50° before vertical axis.





- Insert special tool 34 4 010 in wheel-bolt bore as far as stop and press down until tool bears on tooth profile.





- Pull out special tool.
- Cam on special tool unlocks slack-control lever and pinion of automatic brake slack control is set back by tooth profile.
- Repeat procedures until brake drum can be removed.
- Installation:
Pinion must seat easily on threaded rod to guarantee automatic slack control.





- Disconnect handbrake cable.
Remove rear brake shoes.
Replace brake shoes.
- Installation:
Always replace all four shoes and use shoes of same make,
Refer to Dimensions. Specifications
- Replace return springs.
- After replacing brake shoes, slack-control pinion must be turned so far in direction of thrust sleeve that adjusting diameter of brake shoes is 228.0 mm (about 0.5 mm less than inside drum diameter).
- Operate brake pedal so often until slack-control sound is no longer heard.

CAUTION: If it is necessary to bleed brakes, this must be done before adjusting handbrake.