BRAKES
Fig.
4
iston, while the trailing shoe rests in a slot
formed in the cylinder body. At the
adjuster end the shoe ends rest in slots in the
adjuster links. The shoes are supported by
latforms formed
in
the backplate, these
&mg
held in position by two hold-down
springs fitted on each shoe
with
a peg passing
through a hole in the backplate.
The adjuster consists of an alloy
housing with studs, which is spigoted and
secured
firmly
to the inside of the backplate
by nuts and spring washers.
The housing
carries
two opposed steel
links,
the outer end slotted to take the shoes, and
the inclined inner faces bearing on inclined
faces of the hardened steel wedge (the axis
of which is at right angles to the links).
The wedge has a
finely threaded spindle
with
a s uare end which projects on the
outside o
1
the backplate. By rotating the
wedge in a clockwise direction the
links
are
forced apart and the
fulcrum of the brake
shoe expanded.
A
piston and seal moves in the highly
Details
of
Rear
Brake
Assembly.
finished bore of a light alloy die cast wheel
cylinder body, whilst a slot, machined in
the opposite end of the body, serves to
carry
the
trailing
shoe. The cylinder,
incorporating a bleed screw
with
rubber
cap, is attached to the back plate by spring
clips which allow
it
to slide laterally. The
handbrake lever pivots on, and projects at
right angles
through
the
back
plate.
When
the brake is a plied, the piston undex
the influence of
%
hydraulic ressure
moves the leading shoe and the
dY
reacts
by sliding on the backplate to operate the
trading
shoe.
The handbrake lever is pivoted
in
thc
cylinder
body
and when operated, the level
tip expands the leading shoe and the pivo
moves the cylinder body and
with
it
thc
trading
shoe.
(a)
Dismantling
If
it
is found necessary to remove
:
rear wheel cylinder, the followin,
procedure should be followed
:-
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