MTB/ ROAD BIKE/ TREKKING
9.1 Gears and drive train
Problem Possible causes Corrective action
Gear does not shift or
not cleanly
Shift lever not operated
correctly
Operate again
Gear out of adjustment Adjust in specialist workshop
On steep incline too great a
pressure on the pedal and/or
pedalling too slowly
Repeat gear shift on at terrain;
Shift when static: Hinterrad anheben, Kurbel in
Antriebsrichtung betätigen, bis der gewünschten
Gang eingelegt ist.
Drive train blocked after
or during shifting
Chain jammed Stop, operate gear shift in reverse, lift rear wheel
and turn crank against direction of drive.
If crank cannot be moved, under no circum-
stances use force. Contact a specialist workshop
immediately.
Unusual noises such
as clicking or cracking
noises, loud grinding
and/or knocking
Damaged drive train/gear
components.
Contact a specialist workshop immediately.
Uneven resistance when
pedalling
Damaged drive train/gear
components.
Contact a specialist workshop immediately.
Chain o Incorrect shift operation (see
Chapter 8.6)
Gear out of adjustment or
damaged
Possible under unfavourable
conditions
Stop,
Lift the chain by hand onto the next sprocket,
lift the rear wheel,
operate the crank in the direction of drive (only if
possible with ease).
If repair is not possible in this way contact a speci-
alist workshop immediately.
Chain comes o after or
during shifting
Incorrect shift operation
(see Chapter 8.6)
Gear out of adjustment or
damaged
Possible under unfavourable
conditions
Stop,
Operate the shift lever in the opposite direction,
Lift the chain by hand onto the next sprocket,
lift the rear wheel,
operate the crank in the direction of drive (only if
possible with ease).
If repair is not possible in this way contact a speci-
alist workshop immediately.
Chain jumps o perma-
nently.
Permanent incorrect operation
of gear shift
Gear out of adjustment or
damaged.
Only operate the gear shift as per instructions in
Chapter 8.6
If operation is correct contact a specialist work-
shop immediately.
Problem Possible causes Corrective action
Brakes do not function
Brake not correctly assembled Correct assembly as per Chapter 11.1
Brake damaged
Contact a specialist workshop imme-
diately.
Reduced braking eect, brake
levers have to be pulled too far.
Worn brake blocks or brake pads
Have brake blocks or brake pads
replaced immediately in a specialist
workshop.
Brake cable stretched, worn or
clamp/s damaged
Contact a specialist workshop imme-
diately.
On hydraulic brakes Brake system
leaking
Contact a specialist workshop imme-
diately
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