Carlton SP8018, Owner'S Manual, Page: 53 / 96

SP8018 SERVICE BELTS
CHECKING SHEAVE ALIGNMENT
•
To check alignment, you must first
remove the belt guard cover.
•
Place a straightedge against the outside
face across both sheaves. Check that
both sheave surfaces are flush with the
straightedge and aligned properly. See
illustration.
•
To align sheaves, follow procedure for
Belt Tension Adjustments.
CHECK FOR WEAR
•
Inspect belts, sheaves and/or sprockets
for wear. See illustrations to assist with
inspection
•
V-Belt-drive efficiency depends on full
contact between the belt and the sheave
walls. As a sheave wears, the walls
where the belt should ride go from being
flat to being “dished” or concave.
Therefore, worn sheaves dramatically
reduce the efficiency of the drive.
VISUAL CUES : The worst sheave wear
will be a highly-polished track in the
sheave wall, deep enough that you can
feel it with your finger. Lesser (but no
less important) wear may be harder to
spot with just your eyes. A sheave
gauge, usually consisting of plastic
wedges shaped like a new belt, can be
inserted into the groove. If the gauge
doesn’t fit squarely into the groove and
you can see daylight around the edges,
your sheave is worn and must be
replaced.
WARNING
Severely worn surfaces on sheave or sprocket
faces may become very sharp. Wear gloves
for protection from nicks or sharp surfaces.
!
The sheave should be replaced when more
than 1/32-inch gap is visible past the
appropriate gauge or straight edge.
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