60
11.4 INSTALLING ADJUSTABLE TENSIONER CONTINUED
16. Install the drive belt and move the tensioner assembly on the
mounting post until it is centered on the belt. Make a judgement or
measurement of the space between the tensioner mounting block and
the mounting post on each side.
17. Choose shims from the kit to go behind and in front of the bracket
and do a test installation of the tensioner bracket. If the bracket is not
centered choose different shims - repeat as necessary.
18. Adjust the drive belt tension to 180 lbs. for new belt, 150 lbs. for
used belt.
19. While observing the distance between the belt edge and tension
roller edge, spin the drive in the forward direction several revolutions.
Stop the machine, spin the drive in the reverse direction and make sure
the belt does not change its contact position on the tensioner wheel as
the crank direction is reveresed. It is possible to achieve 0 mm change
in many cases but up to 0.5 mm is acceptable.
20. Any significant travel or variance observed when the drive direction
is changed indicates that the tensioner is not properly aligned and this
procedure should be repeated from step 2 until there is 0 mm to 0.5 mm
belt travel observed when the drive direction is changed back and forth.
Machine with 1 mm or greater shift in position of the belt on the back
side tensioner would experience shortened belt life and noise.
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