Master cylinder

MASTER CYLINDER

Service repair no - 70.30.09

Before starting overhaul procedure refer to general brake service practice. See Repair, General brake service practice

Dismantling master cylinder

1. Disconnect battery and remove master cylinder from servo See Repair, Master cylinder
2. Before commencing overhaul procedure thoroughly clean master cylinder and inspect outer surfaces for damage and condition, renew complete assembly if necessary.

3. The reservoir is a push fit in master cylinder and secured by seals. Carefully ease reservoir from master cylinder by rolling it from seals as illustrated.
4. Using soft jaws, one either side of master cylinder flange and clamp flange in a suitable vice. Remove water ingress ’O’ ring seal from master cylinder to servo flange and discard.

5. Hold outside of transfer housing with a suitable pair of grips, carefully pull, while working pliers in a backwards and forwards rocking motion to ease housing off master cylinder, discard housing and vacuum seal.

6. Withdraw 2 reservoir seals from master cylinder inlet ports, seals are different and should be noted for assembly. Discard both seals.
7. Remove retaining ring and ’O’ ring seal from machined outer surface of master cylinder, discard both seal and retaining ring.