Pontiac tempest 1968 Service Manual page 609

10-2
1968 P O N T I A C SERVICE MANUAL
makes it mandatory that tire mounting and dismount­
ing be done with the outboard side of the wheel up.
WHEEL STUD
REMOVE AND REPLACE
1. Support the hub and drum assembly with ap­
proximately 1 TT diameter by 5" long pipe or other
suitable tool directly under and surrounding the stud
to be removed and press out the stud.
CA UTION: If hub and drum are not supported
underneath, pressure from the press may distort
the drum or push the hub assembly away from the
drum.
2. Clean out the existing hole by drilling through
the hub and drum assembly. Use a 41/64" (.6406)
drill on Pontiac and a 9/16" (.5625) drill on Tempest
and Firebird.
3. Press in replacement stud.
REMOVE TIRE FROM WHEEL
1. Remove valve cap and valve core. Let out all
the air.
2. With valve hole side of tire down, break beads
away from rim. Use only conventional bead-breaker
type machine.
CA UTION: Do not use hammer or tire irons.
3. Apply a liberal amount of rubber lubricant or
thin vegetable oil soap solution to both beads and
remove the first bead, using the machine method.
CAUTION: During the entire operation of break­
ing beads away from rim and removing tire from
rim, special care should be taken not to damage
the sealing ridges along the tire beads.
PUNCTURE REPAIRS
Puncture repairs may be quickly and permanently
performed, using one of several kits available
through tire manufacturer's dealer outlets.
WHEEL LEAKS
Examine rim flanges for sharp dents. Any dent
visible to the eye should be straightened. Never use
heat when straightening a wheel.
CAUTION: Under no circumstances should wheels
be brazed, welded or peened. In the event the wheel
is severely damaged, it should be replaced.
PREPARATION OF TIRE
Remove excess strings of rubber hanging from tire
bead.
PREPARATION OF RIM
1. Clean rim flanges with small piece of No. 3
coarse steel wool or emery cloth to remove all
oxidized rubber, soap solution or rust. If rim is
badly pitted, use file to remove and paint with
primer.
2. Straighten or replace rim if it is bent or
damaged.
MOUNTING TIRE ON WHEEL
1. Install valve if valve was removed. Always in­
stall valve recommended by tire manufacturer.
2. Apply liberal amounts of vegetable oil soap
solution or approved rubber lubricant to rim edges
and tire beads.
3. Mount tire on the wheel with valve hole side
up, using the machine method.
4. Remove valve core from stem to increase flow
of air.
5. With casing on the rim so that the beads are
resting uniformly on the bead ledge, quickly apply a
large volume of air. This forces the bead on the
bead seat and against the flanges where the air seal
for the tire is obtained. Inflate tire until beads are
completely forced against rim flanges.
CAUTION: Do not stand over tire when inflating.
Bead wire may break when bead snaps over safety
hump. Do not exceed 40 lb. air pressure when in­
flating. If 40 lbs. pressure will not seat beads
properly, deflate, lubricate, and reinflate.
6. Once beads are seated against rim flanges, air
pressure can be released.
7. Install valve c o r e and inflate to proper
specifications.
8. General precautions in mounting tires:
a. Use tire mounting and dismounting machine.
b. Do not use hammer or tire irons.
c. Work over rim flange so that the section
nearest the valve stem will be applied last.