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LOCALISATION OF MALFUNCTIONS
LOCALISATION OF MALFUNCTIONS
LOCALISATION OF MALFUNCTIONS
LOCALISATION OF MALFUNCTIONS
Only carry out repair work if you are certain you have the necessary knowledge and the necessary
tools to carry out the required servicing. If the cause of the malfunction is not clear and its repeated
occurrence cannot be precluded, you should contact a specialised MTF brand retailer.
Some of the basic and most common types of malfunction and how to remove them are as follows:
Proble
Proble
Proble
Problem
m
m
m
Possible cause
Possible cause
Possible cause
Possible cause
Repair measures
Repair measures
Repair measures
Repair measures
The wheels turn with
noticeable resistance.
The tyre pressure is too low and
there may be a tyre defect
(puncture).
Inflate the tyres so that you cannot use
your thumb to compress them. If the
tyre is damaged, replace it.
Tyres or bicycle components are
in contact with the fork or rear
frame assembly, brakes or
mudguards.
If the wheel is not centred in the fork
(assembly) centre it. Centre the brakes
and adjust them if necessary.
Increased resistance in the wheel
hubs.
Adjust wheel bearing play or clean and
lubricate.
The pedals only move
with difficulty.
The chain, chainset, sprockets or
gears are not lubricated
sufficiently.
Clean and lubricate the relevant
components.
The pedal bearings or the bottom
bracket are not sufficiently
lubricated or are damaged.
Replace and lubricate and adjust the
pedal bearings. If necessary, replace.
The pedal strokes are
uneven.
The crank or pedal is probably
loose.
Tighten the crank or pedal.
The hub is incorrectly adjusted.
Adjust properly and tighten, replace if
necessary.
The crank, chainset or pedal axle
has been bent.
Replace.
The chain jumps out
(falls) of the chainset
cogs or sprocket cogs.
The front or rear derailleur is
incorrectly adjusted.
Adjust the limits on the front or rear
derailleur.
The gears don’t work
correctly, the chain
jumps over the
sprockets.
The gear shift lever is loose or
damaged.
Adjust the gear shift lever or replace it.
The securing or guiding element
for the gear cable is loose.
Tighten the guide screws, if necessary
replace the cable.
The front or rear derailleur is not
correctly adjusted
Adjust the front or rear derailleur
The chain length (spacing
between individual elements) has
been extended past the limit
value as a result of wear.
Replace the chain.
The chain is damaged or not
lubricated.
Replace the chain or clean and
lubricate.
