Master Cylinder; Removal; Installation; Front Disc Brake - Datsun 510 Workshop Manual

Brakes
MASTER CYLINDER
Removal
Remove the clevis pin
connecting
the
push
rod
with the
brake
pedal
and
disengage
the
master cylinder
from the
pedal
Disconnect the brake tube from the
master
cylinder
Screw
out master cylinder fixing nuts
and
remove
the
master
cylinder
from the dash
board
Installation
Installation is
a
reversal of the removal
procedure
but the
following operation
should
be added
Adjust
the
pedal height by changing
the
push
rod
length
of the
master
cylinder
Bleed air
out
of the
master cylinder
FRONT DISC BRAKE
Description
Figure
130 shows the relation of forces
working
As brake
pedal
is
depressed
Ii
I
I j
cf
6
@7
4
Y
hydraulic
pressure
from the
master
cylinder
forces the
piston
of wheel cylinder out
of the
caliper
bore and thrusts inner
pad
forward
un
til it contacts disc and
simultaneously pushes
outer
pad by
reaction force F
These forces
cause
rotating
moment
which increases
reac
tion force F This is called self
energizing
ac
tion In this SC brake it is around 50
As
pad
wears
movement of
piston
is in
creased and when seal is deflected
more
than
its elastic deformation
piston
wiil slide
out
ward causing
slip
between seal and
piston
thus
assuring constant
clearance between
pad
and disc
Removal
Jack
up
the vehicle and
support
it
on
stands
and
remove
the wheel
Disconnect the front brake
hose from the
brake tube
Note
Plug
up
the brake tube with
a
wooden peg to
avoid
spilling
fluid
during
work
on
caliper
Screw
out
the bolts
fixing
the
caliper
to
the
knuckle
flange
and
remove
the
caliper
assembly
I
l Y
0
t Push rod
ass
y
2 Dust cover
3
Stopper
ring
4
Piston
ass y
A
5
PistOn
ass1y 8
6
Secondary piston
cap
7 Pbton
8
Primary piston
cap
9 Master
cylinder
body
10 Reservoir band
ass y
11 Reservoir
12 Reservoir cap
ass1y
13 Filter
14 Bleeder
screw
15 Check valve
spring
16 Check valve
ass
y
17 Valve cap
gasket
18
Valve cap
Fig
I29 Tandem Master
Cylinder
82