Owner's manual

8 • COATS 850SS Wheel Balancer
Direct Drive
Balancing a Wheel
1. Mount the wheel using the appropriate mounting
method.
2. Enter the A, W, and D measurements as
described in Determining Wheel Measurements sec-
tion.
Note: These measurements must be entered into
the balancer before attempting to balance a wheel. If
any of the measurements remain at zero, the balancer
will display the appropriate letter (A, W, or D) for the
missing measurement in the left display. The right dis-
play will read ERR.
3. Select a balancing mode. Press the MODE but-
ton until the LED next to the desired balancing mode
is illuminated.
4. Lower the hood. The hood interlock will not allow
the wheel to spin with the hood raised.
5. Press START. The wheel will spin and brake to a
stop. The necessary weight amounts will be dis-
played.
6. Lift the hood.
7. Rotate the wheel until the outer weight position-
ing LEDs flash. This indicates that the weight should
be attached at top-dead-center on the outer plane with
the wheel in this position.
8. Attach the appropriate weight to the outer plane.
9. Repeat steps 6 and 7 for the inner plane, if
weights are to be attached to that plane. Your selected
balancing mode will determine where the weights are
attached.
10. After weights are attached, lower the hood and
press START.
11. The wheel will brake to a stop after a full spin
cycle, and the displays should read 0.00.
If the displays indicate additional weights are
needed, consult the Balance Checking section for pos-
sible causes and corrective action.
Balance Checking
After balancing the wheel, the wheel should be re-
spun to check for accuracy. These steps, when fol-
lowed carefully, will produce a highly accurate wheel
balance.
1. Lower the hood and press START.
2. If the displays indicate additional weight is
required in the same location as the first weight, the
first weight was too small. Replace the weight with
the correct weight and re-spin.
3. If the additional weight position on the re-check is
directly opposite the first, the first weight was too
large. Replace the weight with the correct weight and
re-spin.
4. If the balancer indicates an additional weight
should be applied at an angle to the first weight, the
first weight was not applied at the correct position. To
correct, move the first weight toward the indicated
second position, or add the second weight where indi-
cated.
5. Be sure all the weights are securely attached to
the wheel.
Figure 17 - Flashing Positioning LEDs