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PREVENTIVE MAINTENANCE
In addition to the above inspection procedure, a preventive maintenance program
should be established to prolong the useful life of the hoist and maintain its reliability
and continued safe use. The program should include the periodic and frequent
inspections with particular attention being paid to the lubrication of the various
components using the recommended lubricants.
Minimum Frequent Inspections
TYPE OF SERVICE
ITEM
Normal
Heavy
Severe
M
onthl
y
Week
ly
to
M
ont
hl
y
Daily
to
We
ek
ly
a)
Brake for evidence of slippage.
b)
Control functions for proper operation.
c)
Hooks for damage, cracks, twists, excessive throat
opening, latch engagement and latch operation.
d)
Load chain for adequate lubrication, as well as
signs of wear or damaged links.
e)
Load chain for proper reeving and twists.
Minimum Periodic Inspections
TYPE OF SERVICE
ITEM
Normal
Heavy
Severe
a)
All items in minimum frequent inspections
b)
External evidence of loose screws, bolts or nuts.
c)
External evidence of worn, corroded, cracked or
distorted hook block, suspension screws, gears,
bearings, chain stop and chain guide.
d)
External evidence of damage to hook retaining nut
and pin. Also check the upper suspension adapter
making sure it is fully seated in the hoist frame and
that both screws are tight.
e)
External evidence of excessive wear of brake parts.
f)
Checking the operation of the control station
making sure the buttons operate freely and do not
stick in either position.
g)
Inspect the electrical cords and cables and control
station enclosure for damaged insulation.
h)
Inspect the suspension hook for excess free play or
rotation. Replace worn parts as evidence by
excess free play or rotation.
Summary of Contents for DU903
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