Table of Contents
Advertisement
Nl
THE
BRAKING
SYSTEM
Fig. M.2
The broke
master cylinder
components
1.
Rcservoit.
10.
~o·
ring.
2.
Cover.
11.
Return spring.
3.
Cork
sasket.
12.
Spring supporl
.
4. Filler
cap.
13.
Valve.
5.
Push-rod.
14.
Spring support.
6.
Dished
washer.
15.
Valve s
pring..
7.
Dust excluder.
16. Seal.
8.
Cirdip.
17.
Outlet connection.
9.
Piston.
Section
M.4
DISM ANTLll'OG
THE
M ASTER
CYLINDE
R
Remove
the
master
cylinder fiUer
cap
and drain the
b
rake
fluid from
the
unit.
Ease the dust excluder
clear of the
head of
the
mas
ter
cylinder.
Remove
the
retaining circlip
with a
suitable pair
o
f
pliers
and withdraw
the
push-rod complete with
dished
washer.
Draw
out
the
piston
and
remove
the
rubber
·o·
ring.
The
valve assembly complete
with
springs
and
supports can then
be extracted and the
valve
sealing
ring
removed from the seal bush.
Section M.5
ASSEMBLING
THE MASTER CYLINDER
Clean
all parts
thoroughly, using
only
the
recom·
mended brake fluid
for
all
rubber components.
AU traces
of
petrol
(gasoline), paraffin
(kerosene),
or trichlorethy·
lene
used
for
cleaning the metal
parts
must be
removed
before
assembly.
Examine
aU
the rubber parts
for
damage
or
d.
i
stortion.
It
is
usually advisable to
renew
the rubbers when
rebuild·
ing the
cylinder.
Dip aU the internal parts in brake
Ouid
and assemble them wet. Fit the
valve seal
around the
seal
bush
and
the
'0'
ring
in the
groo'-e on the
piston.
M.4
Place
the
seal
bush in position on
the
valve
stem
and
insert
the
piston
into the spring support, ensuring
that
the head of
the valve
engages the
p iston
bore. Slide the
complete
assembly into the
cylinder
body, taking par·
ricular care not to
damage
or twist the '0'
ring.
Position the push-rod
and
depress tbe
piston
suffi-
ciently to aUow the dished washer
to
seat
on the shoulder
at the head
of
the cylinder. Fit
the
circlip and check that
it
fully
engages in the groove.
Fill the dust
excluder
with Wakefield
No.
3
R ubber
Grease
a nd
reseat
the
excluder
around
the
head
of
the
master cylin der.
Section
M.6
REPLACING
THE
MASTER CYUND.ER
Tbe
replacement procedure is the reverse of tbe
removal
instructions given
in
Section M
.3.
After
replacement,
bleed tbe brake
system
as detailed
in
Soetion M.2.
Finally,
check
for leaks with
the brakes
fu
lly applied.
Section
M
.7
REMOVING A
BRAKE
UNIT
Front
Unscrew
the
brake
pipe union nut below
its
support
bracket
and
disco
nnect
a nd
blank
off
the
pipe.
Remove
the
two
outs
securing
the
brake
hose
support bracket
and
remove the
bracket.
Fig.
M.3
A
front
diu
broke
calliper
MGA (Twin Cam). Issue
2.
3'2403
Advertisement
Chapters
Table of Contents
