Pontiac FIREBIRD 1972 Service Manual page 1247

10-10 1972 PONTIAC SERVICE MANUAL
2. CHECK WHEEL
3. CHECK
WHEEL LATERAL
RUNOUT HERE
- -
LATERAL
RADIAL RUNOUT
HERE
* - I
RUNOUT HERE
MAX. .080"
1. CHECK TOTAL RADIAL
RUNOUT HERE
MAX. .080"
*
MAX: .015"
-
EXCEPT RALLY II AND HONEYCOMB
.035"
-
RALLY II AND HONEYCOMB
Fig. 10-1 1 Measuring Runout
equipment is used, always follow the manufacturer's in-
structions for the equipment being used. In addition, pay
particular attention to the following points:
Be sure tires are free of stones or other foreign objects
that may become wedged in the tread. Be sure wheels
are free of mud and brake drums do not drag on
brake shoes.
Be sure tires are at normal operating temperatures
(hot).
NOTE: Always split weight evenly bet ween in-
side and outside of wheel to avoid changing
dynamic balance.
Wheels and tires must be balanced statically before
being balanced dynamically. Recheck static balance
after dynamic balance.
NOTE: When using an on-car balancer to bal-
ance the the front wheels of any 1972 model
with disc brakes, the following procedure
should be used. Using a screw driver, pry with
steady pressure against the back of the caliper
(Fig. 10-12) to push the piston into its bore. Be
careful not to pinch any lines, fittings or the
bleeder valve. While prying, rotate wheel until
drag is removed. If wheel does not rotate freely
after piston is bottomed, pry gently as illus-
trated to free inboard shoe.
4. Clean the master cylinder cover area, remove cover
and siphon out enough fluid from front half of master
Fig. 10-12 Releasing Drag on Disc Brake Rotor