Pontiac FIREBIRD 1972 Service Manual page 429

5-26 1972 PONTIAC SERVICE MANUAL
INSTALLED BRAKE
HOSE MUST BE
BETWEEN EARS O N
CALIPER BOSS
(TYPICAL INSTALLATION)
Fig. 5-22 Installation Drawing
-
Brake Hoses
-
Disc Brakes
3.
Re-fill master cylinder (Fig. 5-1 1).
4. Inspect entire hydraulic system for leaks under pres-
sure. Turn wheel both ways to full lock and inspect.
See that hose does not rub any other part.
REAR HOSE
REMOVE
1. Raise car and support the frame so the rear axle can
be lowered to its full extent of travel. Lower axle.
CAUTION: Use care not to crush exhaust sys-
tem '%kick-undef 'pipe on B Series station wag-
ons when using an axle engaging hoist.
NOTE: It may be necessary to soak the connec-
tions with penetrating oil.
2. Remove front metal brake line, taking care to avoid
damage.
3. Remove "C" clip and release hose from its front
bracket.
4. Unscrew the fittings from the two metal brake lines
at the rear of the hose.
NOTE: Observe the angle at which this fitting
is mounted to the axle housing. When installing
the new hose, be sure that this fitting is at the
same angle.
5. Unscrew the bolt which holds the hose to the rear
axle and remove the hose.
NOTE: Take care not to distort metal brake
lines when removing hose. Pull pipe away at
fitting, and only as far as necessary to provide
clearance.
INSTALL
1. Reverse the above procedure being sure that the rear
hose fitting mounts at the proper angle, and that the
hose is free of kinks and that the metal pipes are well
seated in their clips on the axle housing. Kinked
metal pipes should be replaced.
2. Bleed the rear brakes, as outlined.
NOTE: If for any reason the front brakes must
also be bled on a disc brake car, be sure to
release the metering valve using tool J 23709.
3. Re-fill master cylinder to proper level (Fig. 5-1 1).
4. Inspect the entire system for leaks while applying full
pedal pressure on brake system.
STEEL BRAKE TUBING
Hydraulic brake pipes are double layer annealed steel
terne plate tubing which resist corrosion and have the
physical strength to stand up under the high pressures
which are developed when applying the brakes. In making
up hydraulic brake pipes, it is important that the proper
double flaring tool be used to flare the ends of the tubing
for the compression couplings. Unless the tubing is prop-
erly flared, the connections will leak and the brakes will
become ineffective.
WARNING: WHEN NECESSARY TO REPLACE
BRAKE TUBING, ALWAYS USE SPECIAL STEEL
TUBING, PART NUMBER 3830195 (3/16"),
3830196 (1/4") OR EQUIVALENT, WHICH IS
DESIGNED TO WITHSTAND HIGH PRESSURE
AND RESIST CORROSION. ORDINARY COPPER
TUBING IS NOT SATISFACTORY AND SHOULD
NOT BE USED.
THIS SAFETY STEEL TUBING MUST BE DOU-
BLE-LAP FLARED AT THE ENDS IN ORDER TO
PRODUCE A STRONG LEAK-PROOF JOINT.
A BRAKE PIPE FLARING PROCEDURE IS ILLUS-
TRATED IN FIG. 5-23.