Checking The Brake Discs For Wear; Electrical Cables And Brake Cables; Gear Shift; Stem - Bosch BULLS Twenty 6 EVO Translation Of The Original Operating Instructions

7.4.5

Checking the brake discs for wear

 Check that the brake disc is no less than 1.8
mm 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.
7.4.6

Electrical cables and brake cables

 Check all visible electrical cables and 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

Gear shift

 Check the gear shift and the shifter or the twist
grip setting and adjust it as necessary.
7.4.8

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

USB port

Notice
Any moisture which enters through the USB port
may trigger a short circuit in the display.
 Regularly check the position of the cover on the
USB port and adjust it as necessary.
MY20B01 - 52_1.0_02.10.2019

7.4.10 Checking the belt and chain tension

Notice
Excessive chain tension increases wear.
If the chain tension is too low, there is a risk that
the chain or the drive belt will slip off the chain
wheels.
 Check the chain tension once a month.
1 Check the chain tension in three or four
positions, turning the crank a full revolution.
2 cm
Figure 84: Checking the chain tension
2 If the chain can be pushed more than 2 cm, the
chain or drive belt will need to be tensioned
again by the specialist dealer.
3 If the chain or the drive belt can only be pushed
up and down less than 1 cm, you will need to
slacken the chain or the drive belt.
 The optimum chain tension is achieved if the
chain or the drive belt 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 featured, 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.
Cleaning and servicing
86