Maintenance and car
e
31
HP
Velotechnik
36
Take care that the tubes don't catch fire.At
any rate work in a place with sufficient ventila-
tion.
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 the upper rear chain
tube cut the old tube at the retention spring
at the chain roller and pull the remaining 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 described
above.
For exchaning the upper forward chain tube
cut the zip tie that connects the chain tube
with the mounting strap.Align the velcro of
the new tube to the mounting strap and se-
cure the tube with a new zip tie.
Changing 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.
Take the retention spring off this plastic tube
and put on the new retention spring.Turn the
spring so that the retention spring runs under
the bolt to the tube and the wire lies between
frame and chain tube; that way the spirals face
outwards.
Push the bolt back through the chain roller,
the washer and the chain retention hook, se-
cure the thread with threadlocker and tighten
the bolt with 17-19 Nm.The recessed side of
the chain roller has to face to the frame.
Changing the lower chain tube
The chain tube is connected to the mounting
plate by a rubber sleeve.Additionally it is rout-
ed through a mounting strap in front of the
folding hinge. For dismounting the chain tube,
first cut the zip tie at the mounting strap, then-
grab the sleeve on its rear end and pull it to-
gether 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 follow-
ing the above steps vice versa.
Exchange the lower chain tube. Slide it through
the lower loop of the mounting strap. Hook it
to the mounting plate in reverse order to dis-
mounting. Fix the tube to the mounting strap
with a new zip tie.
