Maintenance and car
e
37
HP
Velotechnik
38
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
rubber tube, then expand the tube end as de-
scribed above.
Changing the complete upper chain pro-
tection or the retention spring
Remove the bolt in the chain roller with an
Allen key 6 mm.Take off the chain roller, the
washer and the chain retention hook.
The end of the threaded tube in the frame is
protected with a plastic tube.
Take the retention spring off this plastic tube
and put on the new retention spring.Turn the
spring so that the retention springs run under
the spacer to the tubes and the wires lie bet-
ween frame and chain tube; that way the spi-
rals face outwards.
Push the bolt back through the chain roller,
the washer and the chain retention hook, se-
cure the thread with Loctite and tighten the
bolt with 17-19 Nm.The recessed side of the
chain roller has to face to the frame. Make su-
re the washer is placed between chain roller
and plastic tube / frame.
Changing the lower chain tube
The chain tube is connected to the mounting
plate by a rubber sleeve. For dismounting the
chain tube, grab the sleeve on its rear end and
pull it together with the chain tube to the rear.
The rubber sleeves will release the rear
tongue of the mounting plate then. Swivel the
chain tube sidewards. Having done that pull
the chain tube to the front to release the
sleeve from the front tongue of the mounting
plate. Replace the chain tube and mount it by
following the above steps vice versa.
