Bulls 21-17-1093, Translation Of The Original Operating Instructions

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MY21B01 - 22_1.0_02.09.2020
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Cleaning and servicing
7.4.6 Checking the electrical cables and
brake cables
 Check all visible electrical cables and Bowden
cables for damage. If the sheathing is
compressed, a brake is defective or a light
does not work, the pedelec must be removed
from service until the lines or cables have been
repaired. Contact your specialist dealer.
7.4.7 Checking the gear shift
 Check the gear shift and the shifter or the gear
twist grip setting and adjust as necessary.
7.4.8 Checking the stem

The stem and quick release system must be
inspected at regular intervals. The specialist
dealer should adjust them if necessary.
 If the hexagon socket head screw is also
loosened, the headset backlash also needs to
be adjusted. Medium-strength thread locker,
such as Loctite blue, then needs to be applied
to the loosened screws and the screws
tightened as per specifications.
 Contact your specialist dealer if there is any
wear or signs of corrosion.
7.4.9 Checking the USB port
7.4.10 Checking the chain tension
1 Check the chain tension in three or four
positions, turning the crank a full revolution.
Figure 100: Checking the chain tension
2 If the chain can be pushed more than 2 cm, the
chain will need to be re-tensioned by your
specialist dealer.
3 If the chain can only be pushed up and down
less than 1 cm, the chain needs to be
slackened as required.
 The ideal chain tension has been achieved if
the
chain can be pushed a maximum of 2 cm in
the middle between the pinion and the toothed
wheel. The crank must also turn without
resistance.
4 If a hub gear is fitted, the rear wheel must be
pushed backwards or forwards to tighten the
chain. Contact your specialist dealer.
5 Check the handlebar grip is firmly in position.
Notice
Any moisture penetrating through the USB port
may cause a short circuit in the
on-board
computer .
 Regularly check the position of the cover on the
USB port and adjust it as necessary.
Notice
Excessive chain tension increases wear. If the
chain tension is too low, there is a risk that the
chain will slip off the chain wheels .

Check the chain tension once a month.
2 cm