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
7.4.1.4 Checking and adjusting the tyre
pressure – Presta valve
Only applies to pedelecs with this equipment

It is recommendable to use
a bicycle pump with a
pressure gauge. The
operating instructions for
the bicycle pump must be
adhered to.
1 Unscrew and remove the
valve cap.
2 Open the knurled nut
around four turns.
3 Carefully apply the bicycle
pump so that the valve
insert is not bent.
4 Pump up the tyre slowly and pay attention to
the tyre pressure in the process.
5 Correct the tyre pressure as per the
specifications on the tyre.
6 Remove the bicycle pump.
7 Tighten the knurled nut with your fingers.
8 Screw the valve cap tight.
9 Screw the rim nut gently against the rim with
the tips of your fingers.
7.4.1.5 Checking and adjusting the tyre
pressure – Schrader valve
Only applies to pedelecs with this equipment

It is recommendable to use a
bicycle pump with a pressure
gauge. The operating
instructions for the bicycle
pump must be adhered to.
1 Unscrew and remove the
valve cap.
2 Attach the bicycle pump.
3 Pump up the tyre slowly
and pay attention to the tyre pressure in the
process.
 The tyre pressure has been adjusted as per the
specifications.
4 Remove the bicycle pump.
5 Screw the valve cap tight.
6 Screw the rim nut (1) gently against the rim
with the tips of your fingers.
7.4.2 Brake system
The maintenance interval for the brake depends
on the weather conditions and how frequent the
bicycle is used. If the pedelec is used under
extreme conditions such as rain, dirt or high
mileage, maintenance must be performed more
frequently.
7.4.3 Checking the brake linings for wear
Check brake linings after brake has been fully
applied 1,000 times.
1 Check that the brake linings are no less than
1.8 mm wide at any point and no less than
2.5 mm between the brake lining and
supporting plate.
2 Push brake lever and hold. In doing so, check
the transport safety wear gauge can fit
between the brake lining supporting plates.

The brake linings have not reached their wear
limit. Contact your specialist dealer if any of
these components have become worn.
7.4.4 Checking the pressure point
 Pull brake lever and hold repeatedly several
times.
 If you are unable to clearly detect the pressure
point and it changes, the brake needs to be
vented. Contact your specialist dealer.
7.4.5 Checking the brake discs for wear
 Check that the brake disc measures no less
than 1.8 mm in depth at any point.
 The brake discs have not reached their wear
limit yet; brake discs need to be replaced if
they have. Contact your specialist dealer.
Crash caused by brake failure
Worn brake discs and brake linings, as well as a
lack of hydraulic fluid in the brake cable, reduce
the braking power. This may cause a crash with
injuries.
 Check the brake disc, brake linings and
hydraulic brake system on a regular basis.
Contact your specialist dealer if any of these
components have become worn.
CAUTION
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