Self-Adjusting Brakes; Parking Brake - GMC 1976 TRANSMODE Operating Manual

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Parking Brake Control
On your vehicle,
if
power assist to the
brakes is interrupted
due
to
a
stalled
engine
or
some
malfunction,
two
or
more brake applications can
normally
be
made using
reserve
power.
If
the brake pedal is held down, the
system
is designed to bring the vehicle
to
a
full
stop
on
reserve
power.
However, the reserve power is partially
depleted
each time
the
brake pedal is
applied
and
released.
Do
not
pump
brakes when brake power assist has been
interrupted,
except
when
necessary
in
order
to
maintain
steering control on
slippery su
rf
aces.
When
reserve
power
is
exhausted, the
vehicle can still be stopped by applying
greater force
to the pedal.
SELF-ADJUSTING BRAKES
Brakes on
this
vehicle
(except for the
Parking Brake)
are self-adjusting, designed
to
eliminate
periodic adjustments.
Drum
brake
adjustments
are
automatically
as
the
brakes
are
while vehicle
is·
moving backwards
..
made
applied
Dis
c
brake
adjustment
is
made
automatically with
each brake
application.
18
If excess
brake
pedal
travel
develops,
drive
alternately
backward
and
forward
several times
and
apply
brakes
firmly in
each
direction.
See
your
dealer
if normal pedal travel is
not
restored,
or
if
there
is
a
rapid
increase in pedal
travel,
which
could be
a sign of
other
brake
trouble. See
your
dealer also
if adjustment of the parking
brake
is
required.
NOTE:
"Riding
The
Brake"
by
resting
your foot
on the brake pedal when
not
intending
to
brake
can
cause abnormally
high
brake
temperatures,
excessive
lining
wear
and
possible
damage
to
brakes
in
addition
to wasting gasoline.
REMINDER:
Front
disc
brakes
have
a
built-in wear indicator
that
is
designed to
make
a
high
frequency
,
squealing,
or
cricket-like warning
sound
when the linings
are worn
to where
replacement
is
required.
The
sound
will
occur
intermittently
or
continuously
when wheels are rolling, but
will
disappear
when
the
brake
pedal
is
applied firmly.
See
also
the
various brake
checks
listed
in
the
maintenance
schedule
folder.
PARKING BRAKE
To set parking brake, pull
up the
handle
located
on
the
floor
against
the
left
wall, below the
instrument
panel.
For increased
holding
power,
first depress
regular brake
pedal
with the right
foot,
and
hold
it
while
setting
the
parking
brake
with left hand.
To
release
parking brake
push the handle
down.
As
a
reminder,
the
"PARK
BRAKE"
reminder
light is
designed
to
come on
whenever
the
parking
brake
control
is
not
fully
released,
and
the
ignition is
on.
Never
drive
vehicle
with parking brake
set
as
this may overheat or
otherwise
damage
rear
brakes.

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