Mitsubishi Electric Lancer Evolution-VII Workshop Manual page 815

31-4
WHEEL BALANCE ACCURACY
PURPOSE
This section contains tips and procedures for
achieving accurate wheel balance. Steering wheel
vibration and /or body shake can result if any of
these procedures 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,
components.
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.
Spring plate
Confirming Proper Balance
1. After balancing the wheel, loosen the wing nut
and turn the wheel 180° against the balancer's
hub. Then retighten the wing nut and check
the balance again. Repeat wheel balance if
necessary.
Wheel Balancer Calibration Checks
1. Mount an undamaged original-equipment alloy
rim and tire assembly (wheel) onto your
off-the-car wheel balancer. Balance the wheel.
WHEEL AND TYRE -
or steering
Hub/shaft assembly
Wheel mounting
cone
Troubleshooting
Check your balancer's calibration approximately
every 100 balances. Your wheel balancer's
instruction manual should include calibration
procedures. If the
specifically for your balancer are missing, use the
generic steps in this section for zero calibration,
static balance, and dynamic balance checks. The
wheel balancer calibration checks are also
described in the flowchart. (Refer to P.31-5.)
3. Install a wheel mounting cone. The appropriate
size cone for this vehicle is 67.0 mm.
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.
Clamping cup
Wing nut
Standard passenger
car wheel
2. Turn the wheel again 180° against the
balancer's hub.
out-of-balance each time it is turned against
the balancer's hub, the wheel balancer may
require calibration.
2. <<Zero Calibration Check>>
Loosen the balancer wing nut, rotate the wheel
a half turn (180°), and retighten the nut.
Recheck the balance.
calibration procedures
If the wheel becomes