Mitsubishi Grandis. Manual — part 976

TROUBLESHOOTING

WHEEL AND TYRE

31-3

TROUBLESHOOTING

DIAGNOSIS

M1311000700534

Symptom

Probable cause

Remedy

Reference page

Rapid wear
at shoulders

Under-inflation
or lack of
rotation

Adjust the tyre
pressure.

For tyre inflation
pressure, refer to
the label on the
driver's side centre
pillar.

Rapid wear
at centre

Over-inflation
or lack of
rotation

Cracked
treads

Under-inflation

Adjust the tyre
pressure.

For tyre inflation
pressure, refer to
the label on the
driver's side centre
pillar.

ACX00923AB

ACX00924 AB

ACX00925AB

ACX00926AB

ACX00927AB

TROUBLESHOOTING

WHEEL AND TYRE

31-4

WHEEL BALANCE ACCURACY

M1311001700377

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 tyres must be properly mounted on a

balancer in order to achieve correct balance.
Centring 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 tyres, shocks,
suspension components, or steering components.

Check your balancer's calibration approximately
every 100 balances. Your wheel balancer's
instruction manual should include calibration
procedures. If the calibration procedures 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 ).

Wear on one
side

Excessive
camber

Check the camber.

<Front>
Refer to GROUP
33, On-vehicle
service

− Front

wheel alignment
check and
adjustment

P.33-4

.

<Rear>
Refer to GROUP
34, On-vehicle
service

− Rear

wheel alignment
check and
adjustment

P.34-3

.

Feathered
edge

Incorrect toe-in

Adjust the toe-in.

Bald spots

Unbalanced
wheel

Balance the wheels.

P.31-4

Scalloped
wear

Lack of rotation of tyres or worn
or out-of-alignment suspension

Rotate the tyres, and
check the front or
rear suspension
alignments.

<Front>
Refer to GROUP
33, On-vehicle
service

− Front

wheel alignment
check and
adjustment

P.33-4

.

<Rear>
Refer to GROUP
34, On-vehicle
service

− Rear

wheel alignment
check and
adjustment

P.34-3

.

Symptom

Probable cause

Remedy

Reference page

ACX00928 AB

ACX00929 AB

ACX00930AB

ACX00931AB

ACX00932AB

ACX00933 AB

ACX00934

TROUBLESHOOTING

WHEEL AND TYRE

31-5

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 centre hole on the

hub side has a chamfered edge. Use a
back-mounting cone on your wheel balancer to
centre the wheel on the balancer shaft.

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.

<CONFIRMING PROPER BALANCE>

1. After balancing the wheel, loosen the wing nut

and turn the wheel 180

° against the balancer's

hub. Then re-tighten the wing nut and check the
balance again. Repeat wheel balance if
necessary.

2. Turn the wheel again 180

° against the balancer's

hub. If the wheel becomes out-of-balance each
time it is turned against the balancer's hub, the
wheel balancer may require calibration.

<WHEEL BALANCER CALIBRATION
CHECKS>

1. Mount an undamaged original-equipment alloy

rim and tyre assembly (wheel) onto your
off-the-car wheel balancer. Balance the wheel.

2. <<Zero Calibration Check>>

Loosen the balancer wing nut, rotate the wheel a
half-turn (180

°), and retighten the nut. Recheck

the balance.

• If the imbalance is 5g or less, the zero calibration

is OK. Rebalance the wheel, then go to Step 4 to
check static balance.

• If the imbalance is more than 5g, go to Step 3.

3. Loosen the balancer wing nut, rotate the wheel

1/4 turn (90

°), and retighten the nut. Recheck the

wheel balance.

• If the imbalance is 5g or less, the wheel may not

be centred on the balancer, or the balancing
cones, the cup, and/or wing nut are damaged,
dirty, or inappropriate for the wheel. You may
need to refer to the balancer manufacturer's
instructions to verify the correct attachments.
After making the necessary corrections, recheck
the wheel balance. If OK, then go to Step 4.

• If the imbalance is more than 5g, the balancer

requires calibration. Contact the balancer
manufacturer for calibration by their repair
representative.

4. <<Static Balance Check>>

Attach a 5g weight to the outer rim. Recheck the
balancer. The balancer should detect 5

± 2g of

imbalance 170 to 190

° away from the 5g weight.

• If the imbalance is within specification, the static

balance calibration is correct. Go to Step 5 to
check the dynamic balance.

• If the imbalance is out of specification, the

balancer requires calibration. Contact the
balancer manufacturer for calibration by their
repair representative.

5. <<Dynamic Balance Check>>

Attach a 5g weight to the inner rim at 180

°

opposite the 5g weight that was added in Step 4.
Recheck the balance. The balancer should detect
5

± 2g of imbalance 170 to 190° away from both

the inner and outer 5g weights.

AC305700AB

Hub/shaft assembly

Clamping cup

Wing nut

Standard passenger car wheel

Wheel mounting cone

Spring plate

TROUBLESHOOTING

WHEEL AND TYRE

31-6

• If the imbalance is within specification, the

dynamic balance calibration is correct. The
balancer calibration checks are complete.

• If the imbalance is out of specification, the

balancer requires calibration. Contact the
balancer manufacturer for calibration by their
repair representative.