Vehicles after change point in 1982
OVERHAULING REAR BRAKE
CALIPER
- USE REPAIR KIT -
Remove and install rear brake caliper
34 21 220.
Press off plastic caps (1).
Unscrew guide bolts (2).
Installation:
Only clean guide bolts - don´t lubricate.
Check condition of guide bolts, replace if
necessary.
Tightening torque*).


34 21 220
*) See Specifications

Disassemble caliper.
Remove brake pads.
Installation:
Press brake pad toward outside fully, prior
to installing spring (4).

Press off rubber cap and clamping ring.
Place a liner (hard wood, hard felt or similar
material) in caliper recess to protect piston.
Press out piston with compressed air applied
through connection bore.
Caution!
10 bar (140 psi) air pressure is equal to a
force of about 1250 N (275 lbs.).

Check guide sleeves (5), using guide sleeves in
repair kit if necessary.

Remove seal carefully with a plastic needle.
Clean cylinder bores and parts with alcohol and
dry with compressed air.
Inspect cylinder bore, piston and flange surfaces
for damage thoroughly.
Machining od cylinder bores and pistons is not
permitted.
Installation:
Give all parts a light coat of ATE brake cylinder
paste before installing.

Pull rubber cap on to piston first.
Do not cant piston.
Press in piston with a piece of hard wood.

Pull rubber cap over edge of cylinder bore and
secure with clamping ring.
Assemble caliper.