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c) Changing a tyre
The tyres are fixed on the wheel rim and cannot be re
-
moved. If a tyre is worn, the entire wheel must be replaced.
After removing the nut cover (A), loosen the wheel nut (B)
with a suitable spanner, and then pull the wheel off the
wheel axle (D).
Attach the new wheel so that the hex socket on the inside
of the wheel rim fits exactly over the wheel hub nut (C).
Screw the wheel onto the axis using the wheel nut (B) that
you previously removed. Do not use any force, otherwise
the wheel will not spin freely and the drive components
may be damaged. Insert the nut cover (A) onto the wheel
nut (B).
When you remove the rear wheel, the wheel hub nut (C) may get stuck in the wheel rim or become de-
tached from the wheel axis (D). Ensure that the drive pin (E) does not fall off.
If the wheel is subsequently re-fitted, it is important to check that the drive pin (E) is inserted exactly into the
centre of the wheel axle (D) and that it is positioned in the corresponding notch on the wheel hub nut (C).
If the drive pin (E) is missing, no torque can be transferred from the motor to the wheel and the wheel will
spin freely.
d) Adjusting the backlash
The backlash is preset to an optimal setting and does not
normally need to be corrected.
However, vibrations may cause the screws in the motor
to become loose after prolonged use. If this occurs, the
screws must be tightened and you must check that the
backlash is correct.
Remove the dust cover (A) by unscrewing the 3 screws.
