10-2
1968
PONTIAC 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 core 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.
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