Full Product Manual
“breakin”, after which small periodic adjustments may be required. However, if a cable that has
been in service for 6 months should suddenly require frequent adjustments or has used all the
cable adjustment available, all cables must be replaced immediately.
6. If any cable is found to be in need of replacement, the entire cable set must be replaced
immediately.
7. Cables are expendable items and should be replaced as a set every 20,000 cycles (estimated) or
every 6 years, unless earlier replacement is indicated during inspection.
SHEAVES AND PINS:
1. Inspect sheaves and pins in yokes and runways. Sheaves 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 cables.
2. Inspect sheaves (pulleys) in yoke ends with lift in lowered position or resting on the locking
latches.
3. Hold lowering handle down and pull on cable in column to create slack in cables.
4.
Check for excessive side to side wobble. Grasp rim of sheave and attempt to wobble (tilt) side to
side. If sheaves wobble (tilt) more than 3/16" (4.8 mm) side to side or move up and down on shaft
more than 1/32" (0.8 mm), the sheave and pin (shaft) should be replaced, refer to Figures below.
5. Check sheaves and replace if cracks are found.
6. Check for ease of rotation. If sheaves do not turn freely, the sheave and sheave pin should be
removed, inspected, lubricated, and reinstalled or replaced.
7. Fully raise lift. Inspect sheaves (pulleys) in runway ends with lift in raised position.
8.
Visually inspect alignment of sheaves, see figur
e above. Misalignment of sheave(s) indicates
excessive wear; the sheave(s) and sheave pin should be removed and inspected. Replace as
required.
9.
Hold lowering handle down to lower lift onto latches. Pull on cables under runway to create cable
slack. Check for excessive side to side wobble. Grasp rim of sheave and attempt to wobble
(tilt) side to side, refer to figures above. If sheaves wobble (tilt) more than 1/16" (1.6 mm) side to
side, or move in and out more than 1/32" (0.8 mm), the sheave and sheave pin (shaft) should be
replaced.
HYDRAULIC CYLINDER:
1. Inspect the hydraulic cylinder mounting to the runway. Inspect cylinder and hydraulic hoses for
leaks. Repair or replace as required.
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