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PREVENTATIVE MAINTENANCE
4
4. Belt drive
Important: A loose belt as well as an over-
tightened belt may cause injury of the rider or dama-
ge to the drive system. Checking belt tension: To
check for a loose belt, sit on the saddle, place your
feet on the pedals, move the pedals until the crank
arms are horizontal. Next, pull up the emergency
brake handle and hold it. Then, stand on the pe-
dals and rock forward andbackward. There should
be no play or slip in the drive train. If there is slip or
play in the drive train, this indicates that the belt is
B
too loose. Correct a slipping belt drive train: To
A
adjust the belt, pull off the right and the left mainte-
nance covers (A). Loosen the axle nut (B) on both
ends of the flywheel axle by two full turns. Loosen
the inner adjustment nut (D) facing the flywheel axle
on each side of the flywheel. Next, losen the lock
D
C
nut (C).
Then, turn both (right and left sides) of the in-
ner adjustment nuts (D) on the intside of the fly-
wheel bracket ¼ of a turn at atime (upward on
the R side and downward on L side) until the belt
is properly adjusted. Make sure to turn both ad-
justment nuts exactly the same amount to avo-
id misalignment of the flywheel. Re-check if
the amount of play or slip in the drive train has
disappeared.
Finally, retighten the two outer lock nuts (C) to
secure the new adjustment and retigthen the two
axle nuts (B). At last reattach the maintenance co-
vers (A).
C
D
Check if belt drive is firmly tighten and does not slip
while riding under resistance load. In case that the
belt slips, proceed using the same technique as
described above. Please note that a belt drive gear
never shows slack. In case of adjustment do not
apply too much tension.
The manufacturer recommends using an ultrasonic
voltage meter adhering to a natural frequency of
the belt of 3200 Hz ± 150Hz. Ball bearing damage
due to incorrect belt tension is excluded from
Graphics are the right side
warranty.
of the Bike (riding position)
Version 1.1 2010 SB and 2010 TLS Copyright by Indoorcycling Group GmbH | www.indoorcycling.com
ENG 28
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