10-4
1968
PONTIAC
SERVICE
MANUAL
CHECK
WHEEL
LATERAL
RUNOUT
HERE
'/
r
V
—<
^ •
-
^
i
n
CHECK
TOTAL
LATERAL
!
RUNOUT
j
HERE
t ;. i
,
-
f •
Fig.
10-3
Lateral Runout Inspection
quire
reindexing of tire to wheel. If more than 6
ounces is still required for balance, replace the tire.
4. Wheels and tires must be balanced statically
before being balanced dynamically. Recheck static
balance after dynamic balance.
5. When balancing
rear
wheels on the car, always
check to see if car is equipped with
Safe-T-Track
differential. Never balance Safe
- T-
Track-
equipped
car
with one wheel on ground as car may
move
when
engine
is started and transmission is in drive gear.
If
car is equipped with Safe-T-track
rear
axle,
the balancing of the
rear
wheels should be performed
as follows:
a.
Raise and block the
rear
of the vehicle with
both wheels off the floor.
b. Remove one wheel.
c. Reinstall two (2) lug nuts and tighten se-
curely
to retain the brake drum.
1. Rotate tire on wheel.
2. Make total wheel and tire
run
-out check.
3.
Make wheel
run
-out check if total lateral wheel
and
tire
run-
out
exceeds
1/8" after tire rotation or
total
radial
run-out
exceeds
.092".
4. If total wheel and tire assembly run-out minus
wheel run-out is .057" or greater for
radial
run-out,
or
.080" or greater for lateral run-out, excessive
run-out is in the tire. If either occurs, the tire
should be replaced. (Maximum wheel
radial
run-out
is .035", maximum wheel lateral run-out is .045".)
BALANCE
PROCEDURE
The
preferred method of balancing wheels and
tires is with on-the-car type equipment. But whether
on or off car-type equipment is used, always follow
the manufacturer's instructions for the equipment
being used. In addition, pay particular attention to
the following points.
1. 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.
2.
Tires
are at normal operating temperatures
(hot).
3.
Never use more than 6 ounces of balance
weights. Always split weight evenly
between
inside
and
outside of wheel to avoid changing dynamic
balance. If more than 6 ounces is required, reindex
wheel to drum. Continued out of balance would re-
d.
Proceed with balancing operation on the re-
maining wheel using
engine
power to spin the
wheel.
e. When proper balance has been achieved on
first
wheel, reinstall the second wheel and balance
in
the same manner.
6. When balancing
rear
wheels on the car, remem-
ber that: With one wheel on the ground,
speedometer
speed is one-half (1/2)
rear
wheel speed. With both
wheels off the ground,
speedometer
speed is the
same as
rear
wheel speed.
Wheels are identified as follows:
PONTIAC
Standard
. H
Station Wagon
„
K
Disc
Brake
and certain heavy
duty
options
I
Rally
II ... . . JB
TEMPEST
Standard
. . . B
GTO
HG
Disc
Brake
(Standard) HJ
Disc
Brake
(GTO).
HF
Rally
I KB
Rally
H (Drum only) JC
Rally
II (Disc only) JA
FIREBIRD
Standard
HG
Rally
II JC
Disc
Brake
HK
To Next Page
Loading...
