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Use and maintenance manual
TYRE POSITION (OUTSIDE)
RIM POSITION (INSIDE)
6.10 UNBALANCE OPTIMIZATION
The program allows total wheel out-of-balance to be reduced by compensating, when possible, tyre and rim out-
of-balance values. It is suitable for static unbalance values in excess of 30 grams. It requires two runs, rotating
the tyre on the rim on the second run.
1. Press:
If no unbalance was measured before, START appears on the display. Press this button to proceed.
Close the guard (and press the button
START
if start from the guard is disabled,
MENU
) to perform a spin.
2. Make a reference mark on the flange and the rim (using a piece of chalk, for example). With the aid of a
tyre remover, turn the tyre on the rim by 180°.
Refit the wheel in such a way that the reference marks on the rim and the flange coincid
e.
Close the guard (and press the button
START
if start from the guard is disabled,
MENU
) to perform a spin.
3. RH display: percentage reduction value
LH display: actual static unbalance value which can be reduced by rotation
4. Mark the two positions of the rim and tyre, and turn the tyre on the rim until the positions coincide to
achieve the optimisation shown on the display
When optimisation is complete, close the guard to perform a new spin or press
STOP
to return to the measure-
ment screen.
Summary of Contents for M420
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