Page 13
Model EEWB308B Operators Manual
4.6 CORRECTION OF THE IMBALANCE
NOTE:
Before spinning the wheel make sure proper eye
protection is worn by all personnel in the vicinity of the
balancer.
A.
Use left hand crank handle to spin the wheel up to
speed. A tone will sound when sufficient speed is at-
tained. When the balancing cycle is completed the
wheel will stop automatically and the imbalance values
will appear on the LED’s.
NOTE
: Do not use the foot operated shaft lock as a
brake, it is intended to be used only to prevent shaft
rotation while placing corrective weights.
B.
Read the imbalance value on the outer display. Val-
ues are displayed in ounces but can be displayed in
grams if required and are automatically rounded to the
nearest commercial wheel weight.
Turn the wheel until the displays of the outer plane im-
balance position indicator are illuminated green. Apply
the wheel weight at twelve o’clock position. Use the foot
operated shaft lock to prevent shaft rotation while plac-
ing weights.
C.
Correct the imbalance on the inner plane in the same
manner.
4.7 VERIFICATION OF THE RESULTS
Spin the wheel again and check that the readout is
“0.00” “0.00”
If a residual imbalance is displayed:
A.
Check the rim parameters, if entered value is incor-
rect, correct as needed. Imbalance values will be re-
computed after re-spinning wheel.
B.
Check if the balancing mode selected is the most
appropriate. If not, choose the right mode and respin.
C.
The wheel weight could have been placed at a wrong
position. To check this, position the wheel at the correc-
tion position for the outer plane. If the wheel weight pre-
viously attached is in sector ‘
L
’ or ‘
R
’ ( Figure 14), move
the wheel weight up about 1” (2.54cm).
If the wheel weight is in sector ‘
D
’ cut a piece of the
wheel weight of an approximate value corresponding to
the value shown on the right display, or replace the wheel
weight with a lighter one.
If the wheel weight is in sector ‘
U
’ add a weight of value
indicated by the display or replace the wheel weight
with a heavier one. Repeat the same operation for the
inner plane.
NOTE:
If this situation is repeated, your machine may
be out of calibration and a calibration operation might be
required as instructed on page 14.
D.
If an
ALU
function was selected ensure that the wheel
weights have been placed in accordance to the program
chosen.
E.
Check that the quick nut is tight and that the wheel is
not slipping against the backing collar.
F.
Check that the wheel and adaptors are clean.
Figure 14
4.8 VIBRATION PROBLEMS
If vibration is still present after balancing, check the fol-
lowing possible sources of vibration:
1. Stones caught in the tire tread.
2. Tire slippage on the wheel.
3. Incorrectly mounted wheel.
4. Imbalanced wheel covers.
5. Excessive radial or lateral runout in the tire or
wheel.
6. Damaged wheel bolt holes.
7. Worn universal joints.
8. Imbalanced brake rotors or drums.
9. Worn or damaged balancer accessories.
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