Gazelle bike, User Manual

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32 33
M
ain
tenanc
e and inspec
tion
Cleaning the derailleurs and chain
The best way to clean the derailleur is by using Gazelle chain
cleaner (fig. 70). Afterwards you can lubricate the system with
Gazelle derailleur oil. Make sure that the chain is clean and
supple as well. Also, at the Gazelle dealer you can purchase
special cleaning sets to easily clean the derailleur.
The cassette
The cassette transfers the turning movement of the chain to
the rear wheel. On bikes fitted with derailleurs that cassette can
feature seven, eight or nine sprockets. These sprockets can wear
quickly due to accumulated dirt or poor chain tension. If this is
the case, the chain can become damaged or annoyingly “clatter”
over the sprockets. Then there is no other option than to have the
cassette replaced.
However, good and regular maintenance will prolong the
cassette’s service life. Therefore, regularly and meticulously
remove the dirt that accumulates at the cassette. Remove the
worst dirt with a brush and then apply special chain or derailleur
cleaning fluid. Make sure that no dirt remains in the spaces
between the sprockets. This is best removed with a brush. Let
the chain dry properly after cleaning it and then apply Gazelle
derailleur oil to it.
Cleaning the chain
It’s best to clean the chain with a brush and Gazelle chain cleaner.
Subsequently let it dry properly before applying Gazelle chain oil
to the chain (fig. 73). If desired, you can use a little brush for this.
Wheel hubs
Some Gazelle models are fitted with wheel hubs with quick
release. To prevent the wheels from becoming loose, the quick
release must have proper tension. To adjust it, place the lever in
position “1” (fig. 72). Then manually turn the nut on the opposite
side of the axle until it can’t go any further. Now push up the
lever so that it reaches position “2” (fig. 71). This is the only way to
make sure that the wheels are held securely. Beware of putting
too much tension on the mechanism in step one, because this
might cause the quick release axle to break.
Recommended tightening torques
There is a prescribed tightening torque for each of the bolts and
nuts on your bike. To achieve these, the Gazelle dealer possesses
special tools. If you do the maintenance of your bike yourself, you
can achieve the prescribed tightening torques using a torque
wrench. See the table below.
Tyre inspection and maintenance
If you’re only able to press your thumb into your tyres a little way
they still contain enough air. You are advised to regularly check the
tyre pressure, because tyres that are too soft have considerable
disadvantages. First, they wear much quicker. In addition, it will
take you a lot less effort to bike with hard tyres. Also, your bike
will respond better to your braking and steering movements. If
your Gazelle is not going to be used for some time, e.g. in winter,
this can have adverse effects on your tyres. Always keep the tyres
properly inflated.
73
70
71
Prevent oil from getting
on the brakes
in any event!
Regular maintenance prolongs
the service life of your
derailleur and chain.
Tightening torque table
Stem lug bolt 12 - 15 Nm
Expander bolt with (stem) wedge 10 - 12 Nm
Nut for seat post bolt M8 15 - 20 Nm
Nut for seat post bolt M6 hexagon socket 12 - 15 Nm
Cranks with square ends: - steel 30 - 40 Nm
- aluminium 20 - 25 Nm
- Shimano 35 - 45 Nm
Headset nut 18 - 23 Nm
Dynamo 8 - 10 Nm
Hub axle nuts front wheels 20 - 27 Nm
Hub axle nuts rear wheels Sturmey Archer 20 - 27 Nm
Hub axle nuts rear wheels Spectro 20 - 27 Nm
Hub axle nuts rear wheels for
derailleur systems
35 - 45 Nm
Hub axle nuts Spectro Super 7 30 - 35 Nm
Hub axle nuts Shimano 30 - 45 Nm
72