WHEEL AND TIRE DIAGNOSIS
TSB Revision
WHEEL AND TIRE
31-9
WHEEL BALANCE ACCURACY
M1311001700764
PURPOSE
This section contains tips and procedures for achiev-
ing accurate wheel balance. Steering wheel vibration
and/or body shake can result if any of these proce-
dures are not carefully observed.
1. Wheels and tires must be properly mounted on a
balancer in order to achieve correct balance.
Centering the wheel on the shaft of the balancer is
essential for proper mounting.
2. Off-the-car wheel balancers must be calibrated
periodically to ensure good balancing results. An
inaccurately calibrated balancer could cause
unnecessary replacement of tires, shocks,
suspension components, or steering components.
Check your balancer's calibration approximately
every 100 balances. Your wheel balancer's instruc-
tion manual should include calibration procedures. If
the calibration procedures specifically for your bal-
ancer are missing, use the generic steps in this sec-
tion for zero calibration, static balance, and dynamic
balance checks. The wheel balancer calibration
checks are also described in the flowchart. (Refer to
P.31-11
.)
PROCEDURE <Balancing Tips>
1. Confirm that the balancer's cone and the wheel
mounting cone are undamaged and free of dirt
and rust.
2. On this vehicle, the wheel's center hole on the
hub side has a chamfered edge. Use a
back-mounting cone on your wheel balancer to
center the wheel on the balancer shaft.
3. Install a wheel mounting cone. The appropriate
size cone for this vehicle is 56.0 mm (2.2 inches).
4. Before balancing the wheel, remove any wheel
weights from both sides. Also check both sides for
any damage.
5. When installing wheel weights, hammer them at a
straight (not diagonal) angle.
Scalloped
wear
Lack of rotation of tires or worn
or out-of-alignment suspension
Rotate the tires, and
check the front
suspension
alignment.
Refer to GROUP
33, On-vehicle
Service
Front
Wheel Alignment
Check and
adjustment
P.33-6
.
Symptom
Probable cause
Remedy
Reference page
ACX00934
AC000041AC
Hub/Shaft
assembly
Spring plate
Wheel
mounting
cone
Standard passenger
car wheel
Clamping cup
Wing nut
