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d
the brake shoe
retracting springs draw the
shoes away
m
the drums and
force the fluid
out of
the wheel
cylinders
ck
into
me
lines
toward the
main
cylinder.
The mechanical
parking brake
uses
a simplified
form
of
• ·age.
The
parking brake
handle, located under the left
ide
of the instrument
panel is
connected by a
flexible
cable
the
equalizer lever just
lO
the
rear
of
the frame
uX"
ember.
The cables
arC
supported at
the rear wheels
by
pecial
clamps
to
permit
the
cables
to
pass
under the
springs.
RAULIC BRAKE FLmTI
Ooly
G.
M.
Hydraulic Brake Fluid
Super
No. 11 should
be used
when bleeding brakes.
This brake fluid
is
satisfac-
tory
for any atmospheric
temperature,
hot
or
cold
and
has
all
the
qua
lities
necessary
for satisfactory operation,
such
as
a
high
boiling
point
to
prevent
evaporation
and tendency
to vapor lock,
and a
fluid
state at
low temperatures.
BLEEDING
lrYDRAULJC
SYSTEM
ir in the
hydraulic
system
must
be
removed
by
a bleeding
operation
after
the
system
has
been opened
at any point,
or when
air has enteTed
the
system
in
any
manner. Air in
the system
is
usually
indicated
by:
1. A
uspongy" or Uspringy"
feeling
of
the
brake
pedal
when
the
brakes are applied.
2. Too much travel
of
tbe brake pedal
(when
the brake
shoe adjusllnent is
known to be corre<;t).
Bleeding
should be
done on the longest
line first
to remove
effectively all
air
from the
system. The
proper
sequence to
follow
is
left rear, right rear,
right
front
and
left front.
In the
bleeding operation
it
is extremely
important
that
absolute
cleanliness
be observed
.
Any foreign matter in
the
system
will tend to clog the Jines, ruin
the
rubber
cups
of
the main
and wheel cylinders and cause
inefficient
FIg.
58-Bludin4
BrOKtS
01
Wheel
Cj"mJrr
operation Or even failure
of
the braking
system.
The
manual method
of
bleeding the
brake
lines
is
described
below.
It
is
rec-
ommended that a
helper
be used
to
assist
in
per-
forming this
operation~
1. Raise hood, dea n all
dirt from top of main
cylinder
mounted.
on
the dash
panel, and
remove filler
plug.
2.
Fill the reservoir with
brake fl uid. The reser-
voir must
be kept
full,
or nearly fun, of
brake
fluid ",hile bleeding the
brake system.
3S
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