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I
I
~
An
anchor
pin in
the
support
plate
assembly
holds the
spring link in
a
fixed
position at one
end.
The other end
of
the link is positioned
by
the
brake shoe
adjusting cam, thereby provid-
ing a constant loaded
spring
length.
Side
r
attle and twisting of the shoe is con-
t rolled by
the
spring
guide, which maintains a
constant
sp
ring
pressu
re
against the side of the
web of the shoe
holding the
shoe
against
the
support
plate. The
sprin
g guide a lso
helps
to
eliminate
brake noi
se.
BmD"
SCREW
56x69
Fig. 3
-
Wheel Cylinder
(Front)
(Sectionol
View)
WHEEL CYLINDERS
-
FRONT
Two
wheel cylinders of the
single
piston
lype
(Fig. 3) are attached to
the
s
upport
plate as-
sembly
.
The
location
of
the cylinders is
such
that when brakes are applied, self-energizing
action affects both front and
rear
shO€s
of
the
front brake when the vehicle
is
traveling for-
ward.
The front
shoe
pivots
in
the bottom of the
support
plate ancl
the
rear
shoe
pivots at the
top.
Each shoe is actuated by
its
own
wheel
cylinder.
The two
cylinders
are
connected
by
a
connector
tube.
WHEEL CYLINDER
-
REAR
Each
rear brake assembly uses
one
wheel
cyl-
inder of the
d ouble-acting
type (Fig. 4). Both
shoes
pivot
in
the
bollom
of the
support
plate
and are actuated
by
the
wheel
cylinder, causing
the
shoes
to operate
in
opposition
to each other.
9
(YLiND'" BOOT
56x4B
Fig. 4
-
Wheel Cylinder
(Re
o
r)
(Seclionol
Vie .....
)
Because of this
arrangement, self-energizing
action is effective on the
rear
brake front
shoe
when
the veh icle is traveling
forward
and ef-
fective on the
rear
shoe when traveling in
re-
ver
se.
CENTER PLANE
BRAKES
SERVICE
PROCEDURES
REAR
BRAKE DISASSEMBLY
Brake Shoe Removal
Block brake pedal to prevent downward move-
ment
of the
pedal.
Fig. 5
-
Removing
Broke
Shoe Return
Spring
Wilh Tool C·3462
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