Gear system and chain
46
HP
Velotechnik
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.
Chain roller
The chain roller guides the chain below the
seat to the rear wheel and is an essential part
of the HP V
ELOTECHNIK
No Squat design. It
ensures that the suspension is not influenced
by pedalling.
Compared to other models the chain roller
has a big diameter and it has a higher area in
the middle to make the chain move as
smoothly as possible. Due to this higher area
the chain does not lie on the roller with its
sharp edged links but with the bushes in the
middle that work like small bushings. In addi-
tion to a very low rolling resistance it also
supports a quiet chain movement.
A chain retention hook between the frame
and the chain roller closes the roller at the
bottom and keeps the chain on the roller
when you pedal backwards.
Attention!
If this chain retention
hook is missing the chain may fall down.
When you start pedalling then the chain
roller, the seat or the frame may be dam-
aged by the chain. Please consult your local
specialist dealer in case this hook is miss-
ing.
The chain roller wears slowly and gradually
shows a sprocket shape in the higher area in
the middle. When this middle area is worn
completely the links of the chain will run on
the roller. In that case you will notice that the
chain makes more noise while running and
you should change the roller. You can pur-
chase the plastic part without the bearing or
the complete roller through your dealer.
The bearings must not be treated with a jet of
water from a high-pressure cleaner or with
solvents since this may destroy the sealings
and remove grease from the bearings. If the
bearings don't move smoothly anymore you'll
have to replace them.
Attention!
The roller comes with
two maintenance free sealed bearings. The
bearings are exchangeable. Between the
bearings there is a spacer that keeps the
correct distance. If you forget to put in the
spacer after you have dismounted the
bearings they will be destroyed when you
tighten the screw while remounting them.
Dismounting and mounting of the chain roller
The chain roller of the Grasshopper fx is
mounted with a special high strength screw of
the German strength grade 12.9 and it may
only be replaced by a screw of the same type
and strength.
The chain roller is not symmetrically shaped;
the recessed side of the chain roller has to
face to the frame, the flat (logo) side out-
wards.