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advaNCed TrouBleShooTiNg
a3. Problem:
drive train click/tick noise once per full crank revolution
Solution:
A. Check bottom bracket. Remove pedals and rotate
crank. If sound persists, replace bottom bracket. If
sound is eliminated, check pedals.
B. Check pedals. Replace pedals and make sure they
are tightened securely. Rotate crank. If sound persists,
replace pedals.
a4. Problem:
Noise multiple times per revolution or once per 1.5 revo-
lution.
Solution:
A. Check belt. Remove shrouds. Visually inspect belt
for irregularity while slowly rotating pedals. Replace if
damaged.
B. Check tensioner spring, pulley. Check the belt
tensioner spring is in place and functional. If tensioner
is in place but is not providing enough tension to
prevent belt from slipping, replace tension spring,
(Figure C).
C. Check flywheel hub.
Slowly rotate crank arms and
listen closely for sound from
flywheel hub. If sound is present,
replace the flywheel.
10
Figure C
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