25.
TO
FlT
FRONT
WHEEL
CYLINDERS
Mount the wheel cylinders on the
back plate and secure each with a
bolt and lock washer.
Connect bridge pipe to bottom
bore of each wheel cylinder, utilising
the union nuts trapped on the pipe.
Ensure that the pipe is located on its
seat before attempting to attach the
nut. Tighten nut sufficiently to give
and oil and
air
tight joint.
Attach the flexible hose to the upper
bore of the rear cylinder, checking
first that the copper gasket is in good
order. Fit flexible hose to bracket
on the chassis frame as described on
page
5.
Fit bleed screw to upper bore of
front wheel cylinder.
Fit brake shoes, taking care to locate
the
"
micram
"
adjusters in the slots
in the leading tip of each shoe, with
the masks in position.
Fit brake drum and bleed hydraulic
system as described on page
3.
Adjust brake as described on page
3.
Check the system for fluid leakage by
applying a firm pressure to the pedal
and inspecting the pipe line and
connections.
Fit road wheel and nave plate. Remove
jacks.
TO
DISNANTLE
FRONT
WHEEL
CYLINDER
Withdraw the piston complete with
piston cover from cylinder body.
Apply
low air pressure to the flexible
hose connection, the rubber cup, the
cup filler and spring
can
readily
be removed.
ASSEMBLE
FRONT
WHEEL
Ensure absolute cleanliness during the
assembly of these components. Assemble
parts with a generous coating of clean
Lockheed Brake Fluid.
Fit the smaller end of the coil spring
over the projection in the cup filler and
insert both parts into the cylinder
body,
with
the spring leading.
Follow up
with
the rubber cup, lip
end foremost, taking care not to damage
or turn back this lip.
Feed in piston with cover in position.
REAR
WHEEL CYLINDER
Description
The cylinder, which is fitted in an elongated
slot in the rear brake plate, is free to slide in
the slot between the tips of the brake shoes
which are of the leading and trailing shoe
type. The cylinder has a single piston
operating on the tip of the leading shoe and
this shoe abutts against a fixed anchor
block at the bottom of the back plate, the
web of the shoe being free to slide in
a slot in a block. The trailing shoe is
located in a similar manner between the
anchor and the closed end of the cylinder
aod
is free to slide and therefore self
centring.
The trailing shoes are operated by move-
ment of the reaction of the leading -shoe
against the brake drum.
A
"
rnicram"
adjuster is located
in
a slot in the top of
the leading shoe.
The wheel cylinder contains a single piston:
split in two, the inner piston being
hydraulically operated while the
outel
piston is manually operated by the hanc
brake lever. A rubber cup mounted in
thc
cup filler is loaded upon the inner pistor
by a spring. When operated hydraulically
the inner piston abuts against the oute:
piston leaving the handbrake lever undis
turbed, and applies a thrust to the tip of thl
leading shoe through the dust cover
micrarn
adjuster and mask. When operatec
manually,
an
inward movement of the hanc
brake lever brings the head of the contac
lever into contact with the outer pistor
thrusting it outwards against the leadin
shoe without disturbing the inner pistor
A rubber boot is fitted to exclude wate
and foreign matter.
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