General Brake Service; Diagnosis And Testing; Preliminary Tests; Road Test - Lincoln Continental 1964 Shop Manual

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PART 2-1
GENERAL BRAKE SERVICE .
PART 2-2
BRAKE SYSTEM
PAGE
. . 2-1
.. " ... . 2-6
2-1
GROUP
2
PART 2-3
SPECIFICATIONS
PAGE
. . 2-20
PART
2-1
GENERAL BRAKE SERVICE
Section
1 Diagnosis and Testing ....... .
2 Common Adjustments and Repa1r'
Page
......... " . 2-1
....... 2-4
Section Page
3 Cleaning and Inspection ................... 2-5
II
DIAGNOSIS AND TESTING
PRELIMINARY TESTS
1. Check the fluid level in the
master cylinder, and add FoMoCo
heavy-duty brake fluid if required.
2. Push the brake pedal down as
far as it will go while the car is
standing still and the engine is run-
ning. If the pedal travels more than
haJfway between the released posi-
tion and the floor, check the brake
adjustment and the automatic ad-
justers.
To check adjuster operation, fol-
low the procedure described under
"Brake Shoe Adjustments" in Part
2-2, Section 2.
Make several reverse brake stops
to ensure uniform adjustment at all
wheels.
3. With the transmission in neu-
tral, stop the engine and apply the
parking brake. Depress the service
brake pedal several times to exhaust
all vacuum in the system. Then, de-
press the pedal and hold it in the
applied position. Start the engine. 1f
the vacuum system is operating, the
pedal will tend to fall away under
foot pressure and less pressure will
be required to hold the pedal in the
appiied position. If no action is felt,
the vacuum booster system is not
functioning. Follow the procedures
in the "Booster Diagnosis Guide."
4. With the engine shut off, ex-
haust all vacuum in the system.
Depress the brake pedal and hold
it in the applied position. If the
pedal gradually falls away under this
pressure, the hydraulic system is
leaking. Check all tubing hoses, wheel
cylinders and connections for leaks.
If the brake pedal movement feels
spongy, bleed the hydraulic system
to remove air from the lines and
cylinder. See "Hydraulic System
Bleeding", Section 2. Also, check for
leaks or insufficient fluid . .
5. Should one of the brakes be
locked and the car must: be moved,
open the brake cylinder bleeder
screw long enough to let out a few
drops of brake fluid. This bleeding
operation will release the brakes,
but it will not correct the cause of
the trouble.
ROAD TEST
The car should be road tested
only if the brakes will safely stop
the car. Apply the brakes at a speed
of 25-30 mph to check for the exist-
ence of the trouble symptoms listed
in Table 1, with the exception of
those resolved in the preliminary
tests and brake chatter. To check
for brake chatter or surge, apply
the brakes lightly from approxi-
mately 50 mph. For each of the
symptoms encountered, check and
eliminate the causes which are also
listed in Table 1.
If the causes of noisy or grabbing
brakes listed in Table
1
have been
checked and eliminated and the
brakes still grab, follow the appli-
cable procedures in the "Booster
Diagnosis Guide."
If the brakes fail to release or if
the pedal is slow in returning, fol-
low the applicable procedures in-
dicated in the "Booster Diagnosis
Guide."
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