GRACE EASY Manual
Page | 107
Undo the four hexagon sockets SW6 (0.24 in) right
and left on the dropouts as well as the screw for the
torque arm SW5 (0.2 in) above the left dropout.
Tighten the belt by tightening the setting screw on
the dropouts which can be moved horizontally, with
a hexagon socket SW4 (0.16 in) with spherical head.
You can use the open end spanner SW10 (0.39 in) to
lock the setting screw via a nut.
Press the belt in the middle between the front and
rear pulley downwards on its upper side with a
finger.
The belt is tensioned correctly when the belt can be
pressed downwards by approx. 12 mm (0.47 in).
As the tension may vary slightly along the belt, this procedure should be performed while
the belt moves further step by step.
Turn the pedal crank one turn and repeat the measurement. If the tension on the belt is too
high or too low, repeat this procedure until the measurement result meets the
requirements.
Turn the crank 10 – 15 times forwards and backwards and observe the line in which the belt
travels. The belt should only touch the side stop (flanged wheel) on the rear timing pulley
slightly or have a maximum gap of around 1 mm (0.04 in). The optimal situation is a
constant distance of 0.5 mm (0.02 in).
