COATS 850 Solid State Wheel Balancer - Manual (Page 16)

10 • COATS 850SS Wheel Balancer
Direct Drive
Maintenance and
Calibration
Preventative Maintenance
1. Keep adapters, faceplate, threaded arbor, and
hub nut clean. Grease and dirt build-up will result in
premature wear and inaccurate balancing. Clean at
least once a day with a vaporizing solvent.
2. Keep the balancer clean, remove all trash, old
weights, and other items from the balancer and the
operating area.
3. Only use approved standard and optional acces-
sories with the balancer.
Calibration
After positioning the balancer in the shop and con-
necting it to the power supply, it should be calibrated
before attempting to balance a wheel. Once cali-
brated, the balancer will automatically measure the
imbalance and positions sensed from the spinning
wheel with extreme accuracy. The balancer does not
require daily calibration, and no further adjustments
should be needed.
Calibration requires a tire/wheel assembly that
meets the following criteria:
1. The inner flange of the wheel, A measurement,
must be between 5 and 8 inches from the balancer
cabinet when mounted on the arbor.
2. The width, W measurement, must be between
5.5 and 7 inches.
3. The tire/wheel must be a 14, 15, or 16-inch diam-
eter by 6 to 6-1/2-inch wide steel wheel with tire
mounted and properly inflated.
Perform the calibration procedure this way:
1. Securely mount an appropriate calibration wheel
on the balancer arbor.
2. Enter the A, W, and D measurements for the
wheel.
3. Remove all weights from the wheel.
4. Press CODE on the key pad, and then press 9,
then 1, then A. This places the balancer in the calibra-
tion mode.
5. Lower the hood.
6. Press START to cycle the balancer.
7. After the wheel has stopped, rotate it until the 2
LEDs next to the outer weight display flash alter-
nately.
8. Attach a 4 ounce calibration weight if in ounce
mode or 100 gram calibration weight if in gram mode
to the outer plane of the wheel at top-dead-center.
Accurate placement is essential to achieving an accu-
rate calibration.
9. Lower the hood.
10. Press START to cycle the balancer.
11. When the wheel comes to a stop, the balancer
is calibrated. Remove the wheel from the balancer,
and remove the calibration weight from the wheel.