Coats ProRide Wheel Balancer User Manual download pdf (Page 29)

Important: Always read and follow instructions. • 25

Calibration Program

In order to gain access to the “Reserved Calibrations

and functions” it is necessary to enter a password.

Any incorrect operation within the functions described

below could impair the operation of the wheel balancing

machine. Unauthorized use will cause cancellation of

the warranty on the machine.

Arm Calibration

Select the gauge to be calibrated and follow the on-

screen instructions.

In width gauge calibration, the dimension needs to be

set:

A - GAUGE “ZERO” DISTANCE

SONAR “ZERO” DISTANCE

Figure 32 - Set Dimension

Machine Calibration

For machine calibration, proceed as follows:

1. Mount an average size wheel with steel rim. Es.:

6" x 15" (± 1")

2. Preset the wheel dimensions with GREAT CARE.

3. Follow the on-screen instructions.

Note: You can change the calibration weight from 40

to 100 g (1.40 to 4.00 oz)

Diagnostic Procedures

After Balance Vibration Problems

If vibration is still present after balancing the wheels

and driving the vehicle on smooth pavement, remove

the wheels and recheck the balance. If a wheel is out

of balance the cause maybe:

• Wheel was not mounted/centered correctly on the

balancer.

• A weight has come off the wheel (possibly the

wrong clip style). Remove the other weights from

the wheel and rebalance.

• Foreign material inside the tire. Remove the tire

from the wheel, remove the foreign material, and

remount. Remove wheel weights and rebalance the

wheel.

• Stones or other foreign objects caught in the tire

tread or rim. Remove the objects. Check and rebal-

ance if needed.

If the balancer still indicates the wheels are balanced

to within 0.01 ounces on both inner and outer displays,

the problem is not in the balance of the wheels. Check

the following possible sources of vibration:

• Tire pressure. Bring all tires up to the recommended

PSI.

• Radial or lateral runout in the tire or wheel. Replace

the damaged part.

• Out of balance in wheel covers or trim rings.

Remove the wheel covers or trim rings and test

drive. If the vibration is gone, remove the shaft and

use an appropriate adapter to mount the wheel to

the balancer. Balance the wheel with the wheel

cover or trim ring attached to the wheel.

• Incorrectly mounted tire and wheel. Remount cor-

rectly.

• Damaged wheel bolt holes. Replace wheel.

• Worn universal joints. Replace as required.

• Drive shaft out of balance or damaged. Balance,

repair, or replace.

• Out of balance in brake rotor(s) or drum(s).

• Suspension out of alignment. Align the vehicle and

replace any damaged or worn parts.

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Coats ProRide Wheel Balancer User Manual Page 29

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