1935 Cadillac - GM Heritage Center

55
BRAKES
drum may prevent proper action of the cam. The
thickness of the drums should be measured in.
from the outer flange.
3. Installation of Brake Lining to Avoid
Squeaking Brakes
To avoid squeaking brakes on Cadillac cars,
when relining the brakes, two corrective measures
should be applied. The lining should be chamfered
^2 m - f° r a distance of about % in. at the
ends as shown in Fig. 14 on both shoes of all four
brakes. In addition, the slight bulge which
occurs around the rivet holes when countersunk
should be ground off with a file or with emery
cloth wrapped around a block of wood.
It must also be remembered that the thickness
of the lining differs on the upper and lower shoes.
The lining on the upper or floating shoe is x /i in.
thick while that on the lower or anchored shoe is
in. thick.
On all except the first few cars a in. washer,
Part No. 120394, is installed on the guide pin for
both the upper and lower shoes on each brake to
increase the tension of the spring against the
brake shoe and dampen out the high pitched
vibration which sometimes causes squeaking
brakes. On the first few cars this washer was not
used and it may be necessary to install it to
eliminate the squeak. The washer should be
installed at the inner end of the guide pin between
the retainer for the spring and the shoulder on the
pin at the brake dust shield.
4. LaSalle Brake Adjustment (See Plate 15)
1. Jack up car, dismount wheels and remove the
inspection hole covers from the brake drum and
braking plate. Also make sure that the hand
brakes are fully released.
2. At each wheel loosen the lock nuts on the
eccentric and the anchor pin, and insert a .010
in. feeler gauge between the lining on the secondary
(rear) shoe and the brake drum.
3. Tap the anchor pin slightly with a soft
hammer in the direction necessary for it to assume
the correct position. At the same time turn the
eccentric in the direction of forward wheel rotation
to give a clearance of .010 in. at both ends of
the secondary shoe, after which retighten both
lock nuts. The clearance at each end of the
secondary shoe should not vary more than .002 in.
plus or minus from the thickness of the feeler
gauge. If the variation is greater than .002 in.,
the anchor pin should be readjusted. Do not
readjust the anchor pin unless an inspection
shows that an adjustment is necessary.
4. Adjust primary shoe by turning notched
adjusting screw outward, using tool HM-13985
until a light drag is felt on the brake drum. Moving
the outer end of the tool toward the center
of the wheel expands the shoes. Then turn the
notched adjusting screw in the opposite direction
Fig. 14.
3/4 in. (approx.) from «ach end
Cadillac brake lining should be chamfered at
both ends
until the brake drum is completely free of brake
drag.
5. Install the adjusting hole cover and the
drum inspection hole cover.
6. Repeat the preceding operations uniformly
at all four wheels.
HAND BRAKE ADJUSTMENT
With the foot brakes fully released, apply the
hand brakes slowly until all slack is taken up in
the brake linUage and the strut rod just starts to
operate the brake shoe in one wheel unit. Then,
keeping the brake shoes in this position by holding
on the brake cable, fully release the hand brake
lever and adjust the clevis on the front end of the
cable so that the clevis pin will just enter both
the clevis and the hole in the outer end of the
lever on the brake cross shaft. Repeat this
operation on the other rear brake. Readjust the
cable clevises if the brakes drag with the hand
brake lever in the fully released position.
FOOT PEDAL AND MASTER
ADJUSTMENT
CYLINDER
The adjustment of the operating rod connecting
the brake pedal to the master cylinder in LaSalle
cars should be checked and readjusted if necessary
to provide proper clearance where it seats in the
cylinder piston. There should be sufficient clearance
at this point to allow M to ^ in. free movement
of the brake pedal before it starts the piston
on the pressure stroke. This adjustment is
important and should not be neglected as the cup
must clear the port in the master cylinder when
the piston is in the disengaged position, otherwise
the compensating action of the master cylinder
will be destroyed and the brakes will drag.
5. Bleeding the LaSalle Brake System
Whenever the pipe line is disconnected from the
master cylinder, the brake system must be bled
at all four wheels. When, however, a pipe is disconnected
from any individual wheel cylinder, that
wheel cylinder only must be bled.