300Tdi Discovery
70
BRAKES
4
REPAIR
MASTER CYLINDER NON ABS
Service repair no - 70.30.08 - Remove
Service repair no - 70.30.09 - Repair
- Lucas Girling - Type 25.4mm AS/AS
WARNING: This master cylinder is not
suitable to be fitted on vehicles with
antilock brake systems.
Before starting repair refer to general brake service
practice.
See General Brake Service Practice
Remove
1. Disconnect battery negative lead.
2. Place a suitable container under master cylinder
to catch brake fluid from cylinder when brake
pipes are disconnected.
3. Thoroughly clean immediate area around all
outlet ports. Remove each brake pipe, sealing
each pipe and outlet port with suitable plugs to
prevent ingress of foreign matter.
4. Disconnect electrical plug from low fluid switch
on reservoir cap.
5. Remove two nuts securing master cylinder to
servo unit remove also spring and plain washers.
6. Detach master cylinder from servo, remove
reservoir cap and drain brake fluid into a suitable
container.
Repair
7. Thoroughly clean master cylinder and inspect
outer surfaces for damage and condition, renew
complete assembly if necessary.
8. Using two soft jaws, clamp master cylinder
flange in a suitable vice. Remove water ingress
’O’ ring seal from master cylinder to servo flange
and discard.
9. Grip outside of transfer housing with a suitable
pair of pliers, carefully pull, working pliers in a
backwards and forwards rocking motion to ease
housing off master cylinder. Discard housing and
vacuum seal.
