Caution: Failure to adhere to the following precautions before tire balancing
can result in personal injury or damage to components:
• | Clean away any dirt or deposits from the inside of the wheels. |
• | Remove any stones from the tread. |
• | Use coated weights on aluminum wheels. |
Tyre and Wheel Assembly Balancer Calibration
- Tyre and wheel balancers can drift out of calibration over time, or can
become inaccurate as a result of heavy use. It is likely there will not be any visual
evidence that a calibration problem exists. If a balancer is not calibrated within
specifications, and a tyre and wheel assembly is balanced on that machine, the assembly
may actually be unbalanced.
- Tyre and wheel assembly balancer calibration should be checked and serviced
in accordance with manufacturer's specifications and recommendations.
Tyre and Wheel Assembly Balancing Guidelines
Important: Tyre and wheel assemblies which exhibit excessive
runout can produce vibrations even if the assemblies are balanced.
It
is strongly recommended that the tyre and wheel assembly runout be measured and corrected
if necessary before the assemblies are balanced.
- If the runout of the tyre and wheel assemblies has not yet been measured, refer
to
Tire and Wheel Assembly Runout Measurement - On-Vehicle, before proceeding.
- There are 2 types of tyre and wheel balance:
Static Balance
- Static balance is the equal distribution of weight around
the wheel circumference. The wheel balance weights (2) are positioned on the
wheel in order to offset the effects of a heavy spot (3).
- Wheels that have static imbalance can produce a bouncing action around
the wheel centre (1) called tramp.
Dynamic Balance
- Dynamic balance is the equal distribution of weight
on each side of the tyre and wheel assembly centre-line. The wheel balance weights (2)
are positioned on the wheel in order to offset the effects of a heavy spot (3).
Wheels that have dynamic imbalance have a tendency to move from side to side around
the wheel centre (1) called shimmy.
- Most off-vehicle balancers are capable of checking both types of balance
simultaneously.
- As a general rule, most vehicles are more sensitive to static imbalance
than to dynamic imbalance; however, vehicles equipped with low profile, wide tread
path, high performance tyres and wheels are susceptible to small amounts of dynamic
imbalance.
Balancing Procedure
Caution: Refer to Safety Glasses Caution in the Preface section.
Caution: Refer to Vehicle Lifting Caution in the Preface section.
Important: When balancing tyre and wheel assemblies,
use a calibrated and well maintained, off-vehicle, two-plane dynamic balancer set
to the finest balance mode available.
- Raise and support the vehicle. Refer to
Lifting and Jacking the Vehicle.
Important: Note the location of each tyre and wheel
assembly in relation to the original position on the vehicle.
- Remove the tyre and wheel assemblies. Refer to
Tire and Wheel Removal and Installation.
Important: The wheel must be mounted on the spin-type
wheel balancer in accordance with manufacturers instructions.
- Mount a tyre and wheel assembly on a spin-type wheel balancer.
- Cycle the wheel balancer to determine if a tyre and wheel assembly imbalance
exists.
• | If an imbalance is found remove and discard all wheel weights from the
tyre and wheel assembly and continue the procedure. |
Important: The correct type of wheel balance weights
for the type of wheel rim being balanced must be used. The correct type of coated
wheel balance weights for aluminium wheels must be used. Refer to Wheel Weight Usage
within this procedure.
Important: The tyre and wheel assembly must be balanced
in accordance with the wheel balancer manufacturers instructions.
- Balance all of the tyre and wheel assemblies.
Important: The tyre and wheel assemblies must be installed
in the correct location in relation to the original position on the vehicle.
- Install the tyre and wheel assemblies. Refer to
Tire and Wheel Removal and Installation.
- Remove the safety stands.
- Lower the vehicle.
Wheel Weight Usage
Important: Clip-on wheel balance weights are not suitable
for the following wheels sizes. Stick-on adhesive weights must be used.
Model
| Engine
| Wheel
| Tyre Designation
|
|
|
Maloo
| V8
| 8.0J x 19 alloy
| 245/40 ZR19 98Y
|
Maloo
| V8
| 8.0J x 20 alloy
| 245/35 ZR20 95Y
|
Maloo
| V8
| 9.5J x 19 alloy
| 275/35 ZR19 96Y
|
Maloo
| V8
| 9.5J x 20 alloy
| 275/30 ZR20 97Y
|
Important: When balancing factory aluminium wheels with
clip-on wheel balance weights, be sure to use special polyester-coated weights. These
coated weights reduce the potential for corrosion and damage to aluminium wheels.
- MC (1) and AW (2) series weights are approved for use on aluminium
wheels.
- P (3) series weights are approved for use on steel wheels only.
- T (4) series coated weights are approved for use on both steel
and aluminium wheels.
Important: A nylon or plastic-tipped hammer must be
used when installing coated clip-on wheel balance weights to minimize the possibility
of damage to the polyester coating and wheel surface.
- The contour and style of the wheel rim flange will determine which type of clip-on
wheel weight (1) should be used.
- The weight should follow the contour of the rim flange. The weight clip
should firmly grip the rim flange.
Wheel Weight Placement - Clip-on Weights
- When balancing, install the wheel balance weights
on the inboard (2) and outboard (1) rim flanges at the positions specified
by the wheel balancer.
-
Customer Concern Verification Sheets
Wheel Weight Placement - Adhesive Weights
Important: When installing adhesive balance weights
on flangeless wheels, do not install the weight on the outboard surface of the rim.
Important: On 19" and 20" inch wheels, any
outer balance weights should align with the spokes of the wheel.
Important: To ensure proper adhesion on 19" and
20" inch wheels, locate stick-on balance weights on flat surfaces only.
- Adhesive wheel balance weights may be used on factory aluminium wheels. Perform
the following procedure to install adhesive wheel balance weights.
- Determine the correct areas for placement of the wheel weights on the
wheel.
When balancing, locate the wheel balance weights along the wheel
centre-line (1) and the inboard edge (2) of the inner wheel surface
at the positions specified by the wheel balancer.
- Make sure that there is sufficient clearance between the wheel weights
and brake system components.
Important: Do not use abrasives to clean any surface
of the wheel. The balance weight attachment areas must be free from corrosion, dirt,
oil or any other foreign material.
- Clean the designated balance weight attachment areas.
- Dry the attachment areas with hot air until the wheel surface is warm
to the touch.
- Warm the adhesive backing on the wheel balance weights to room temperature.
Important: Do not touch the adhesive surface.
- Remove the protective covering from the adhesive backing on the back of the
balance weights.
Important: Press the wheel balance weights into place
with firm hand pressure.
- Install the wheel balance weights to the wheel.