Specifications
PART
2-1-General Brake Service 2-3
be required to hold the pedal in the
applied position.
If
no action is felt,
the vacuum booster system is not
functioning.
LOCKED WHEEL BRAKE
Should one of the wheel brakes be
locked and the car must
be
moved,
open the bleeder screw long enough
to let out a few drops of brake fluid.
This bleeding operation
will
release
the brakes but will not correct the
cause of trouble.
PARKING BRAKE
Visually check the operation of the
parking brake linkage as the park-
ing brake controls are moved to the
applied position. Then, check the opera-
tion of the brake linkage when the
parking brake controls are moved to
the released position. These checks
should indicate whether the manual
parking brake control linkage is op-
erating properly or requires repair
or adjustment due to inability of the
parking brake to hold against mod-
erate vehicle movement.
ROAD TEST
A
road test should
only
be con-
ducted when the operator is sure the
brakes
will
stop the vehicle.
During a road test, apply the ve-
hicles brakes at a road speed of 20
mph for all problem conditions listed
in Figs.
I I
and I2 with the excep-
tion of those resolved in the Brake Sys-
tem Tests and brake chatter. To check
for brake chatter or surge, apply the
brakes lightly at 50 mph. For each
of the symptoms encountered, check
and eliminate the causes which are
listed in Figs.
l
l
and 12.
If the road test reveals one or more
problem conditions listed in Figs.
11
and
12,
correct all malfunctions of
the vacuum system, brake booster
and hydraulic system prior to re-
moving brake drums, brake calipers
(if so equipped), brake shoes and
linings or backing plates.
COMMON ADJUSTMENTS AND REPAIRS
PARKING BRAKE
LINKAGE ADJUSTMENT
MUSTANG- COUGAR
Check the parking brake cables
when the parking brakes are fully
released.
If
the cables are loose, ad-
just them as follows:
I.
Fully release the parking
brake by turning the handle coun-
terclockwise and pushing
it
inward.
2.
Pull the parking brake handle
outward to the third notch from its
normal released position.
3.
Raise the vehicle. Remove the
wheel cover. Install Tool
T66L-
4204-L on the rear wheel (Fig. 3).
4.
Turn the locking adjustment
nut forward against the cable guide
on the equalizer (Fig. 4) until there
is 100 ft-lbs break-away torque at
the rear wheel when turning the rear
wheels in the direction of forward ro-
tation with a torque wrench (Fig. 3).
The torque measurement must be
made relative to the centerline of the
wheel.
5.
Release the parking brake and
make sure the brake shoes return to
the fully released position and no
drag is felt when turning the rear
wheels.
6.
Remove Tool T66L-4204-L. In-
stall the wheel attaching bolts and
torque them to specification. Install
the wheel cover. Lower the vehicle.
COMET-FALCON-
FAIRLANE
Check the parking brake cables
when the brakes are fully released.
FIG. 3-Checking Parking Brake Break-Away Torque
If
the cables are loose, adjust them
as follows:
1.
Fully release the parking brake
pedal.
2.
Raise the vehicle. Loosen the
equalizer lock nut (Fig.
5)
and turn
the nut forward against the cable
guide on the equalizer until there is
22 to 27 pounds tension on the
left
rear cable or there is 100 ft-lbs
break-away torque when turning the
rear wheels in the direction of forward
rotation with
a
toraue wrench and
ADJUSTMENT NUT-37993062
EQUALIZER-2A602
EQUALIZER ROD-2628
H1552-A
Tool T66L-4204-L as shown in
FIG. 4-Parking Brake Linkage
Fig. 3.
The torque measurement
must be made relative
to
the center-
Adjustment
-
Mustang and Cougar
line of the wheel.
Tighten the lock nut.
torque wrench and Tool
T66L-4204-L,
3.
Make sure there is no drag
if
required, Install the wheel attach-
when turning the rear wheels.
inn nuts and torque them to specifi-
4.
Lower the vehicle. Remove the
cation. Install the wheel cover.