Maintenance and car
e
41
HP
Velotechnik
If the tube is too short after you have cut it so
that there is not enough protection anymore it
has to be replaced.You can buy spare tubes ei-
ther as uncut tubes or already cut into the
correct length, complete with retention spring
from your specialist dealer.
Changing the tubes
In order to exchange single parts in the upper
chain tubes cut the old tube at the retention
spring at the chain roller and pull the remain-
ing part off the spring. Now move the smooth
part of the new tube through the spring and
expand the tube end as described above.
Changing the complete upper chain pro-
tection or the retention springs
Disassemble the chain roller. For this purpose
hold the nut on the left side of the frame with
a ring spanner SW 13 and undo the screw in
the chain roller with an Allen key SW 8.
The screw also connects the rear suspension
element with the main frame.
Remember the exact position of the spacers.
Take the bolt off the frame together with the
chain roller. Between frame and chain roller is
a spacer that is encased in a transparent plas-
tic tube.
Take the retention springs off this spacer and
put on the new retention springs.Turn the
springs so that the retention springs run under
the spacer to the tubes and the wires lie be-
tween frame and chain tube; that way the spi-
rals look outward.
Lubricate the shaft of the retaining bolt. Push
the bolt through the chain roller, the washer,
the chain retention hook and the spacer with
the retention spring into the frame. Secure the
thread with Loctite and tighten the nut with
17–19 Nm.
Changing the lower chain tube
Open the retention clips. On the bottom side
of the clip there is a lid that is put over a
hook.You can lift up the lid with a screwdriver
and expand the clip. Change the lower chain
tube and close the clips by fastening the lids
over the hooks.
Danger!
If the bicycle does not stand on
the ground while undoing the screws of the
suspension element the rear swing arm may
come down uncontrolled afterwards and
hurt you seriously. In addition to this the ca-
bles of the gear system and the brakes may
overstretch and you would have to replace
them. Ensure that the rear swing arm comes
down in a controlled and gentle fashion by
putting up a solid string or cable tie be-
tween the main frame and the rear swing
arm.When the bicycle is standing on the
ground the frame and the swing arm come
up against each other. Please make sure that
this happens in a controlled and gentle fash-
ion. Put a cloth between the contact points.
Otherwise, if they come up against each oth-
er uncontrolled your hands may get caught
between main frame, rear arm swing and
suspension element and your bicycle may be
damaged.