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replaced. Do not add washers or other spacers to re-use previously used adjustment
threads.
Wire rope tension adjustment should be performed when installing the lift and every
three months.
10.3.6 Inspect Cable Flange
Make sure the edges of the counter-bores in the cable flange are not damaged or worn,
indicating that cable sleeves may not be properly seated at all times.
10.4 FASTENERS
Check all the attaching bolts and nuts for tightness.
Note: Air cylinder bolts and nuts should allow movement of the cylinder.
10.5 SHEAVES & PINS
Sheaves and pins are expendable items. Sheaves and pins should be replaced when
worn. Use of sheaves and pins with excessive wear will lead to reduced service life of
the cables.
Bushings inside sheaves work best in “dry” condition. Applying oil
will diminish their performance and greases will degrade
performance even further. DO NOT GREASE SHEAVE
BUSHINGS OR SHAFTS.
10.5.1 Visual Inspection of Sheaves
Check sheaves and replace if cracks or other damage are found.
Visually inspect alignment of sheaves. Misalignment of sheaves indicates
excessive wear. Remove, inspect, and, if needed replace sheave and pin.
10.5.2 Measure Sheave Wear
Inspect sheaves in cross-members with lift in lowered position and resting on
safety latches
Place safety stands under front and rear cross-members. Stop lift on
mechanical safety locks. One person should hold the lowering handle on power
unit down while another person pulls on cables in each column to create slack
in cables.
Check for ease of rotation. If sheaves do not turn freely, the sheave and
sheave pin should be removed, inspected, fixed or replaced.
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