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BRAKES
MASTER CYLINDER
- Overhaul
70.30.09
Dismantling
1.
Remove the master cylinder from the servo 70.30.08
and drain the brake fluid.
2.
Remove the four screws (underside of reservoir)
securing the reservoir to the master cylinder and lift
off the reservoir.
3.
Withdraw the reservoir sealing rings (two).
4.
Push the master cylinder secondary plunger slightly
into the bore to allow the tipping valve to seat.
5.
Maintaining slight pressure on the secondary plunger,
remove the tipping valve. Release the plunger.
6.
Withdraw the primary and secondary plungers
complete with seals and springs..
7.
Separate the plungers and the intermediate spring.
8.
Prise up the leaf of the spring retainer and remove the
spring and valve sub-assembly from the secondary
plunger.
9.
Withdraw the valve, spacer, spring washer and valve
seal from the valve head.
10.
Remove the seals from the primary and secondary
plungers.
11.
Thoroughly clean all components.
12.
Examine the cylinder bore for wear, scoring and
corrosion. If damage or wear is evident a new cylinder
must be obtained.
Assembling
13.
Fit new seals to the primary and secondary plungers.
14.
Fit a new valve seal to the valve head.
15.
Place the spring washer on the valve stem (convex
side of washer adjacent to the valve).
16.
Fit the valve
spac~r,
legs leading.
17.
Fit the spring retainer to the valve stem, keyhole
leading.
18.
Slide the secondary spring over the spring retainer
and offer up the secondary plunger.
19.
Place the secondary plunger and valve assembly
between the jaws of a vice covered with clean paper.
Compress the spring and using a small screwdriver
press the spring retainer hard against the secondary
plunger. Holding the retainer in this position, depress
the leaf of the spring retainer hard against the
plunger. Remove the plunger and valve assembly from
the vice and check that the retainer is firmly secured
in the plunger.
20.
Fit the intermediate spring between the primary and
secondary plungers.
21.
Generously lubricate the cylinder bore and plungers
with clean brake fluid and insert the plungers in the
cylinder.
22.
Depress the secondary plunger and fit the tipping
valve.
23.
Renew the reservoir sealing rings and fit the reservoir.
70.30.09
5
Triumph TR6 Manual. Part No.
S45277
Issue 1
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