COATS ProRide Wheel Balancer - Manual (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.