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10
subjected.
Periodic inspections are to be performed semi-annually and the should include the
following:
1.extemal evidence of loose screws.
2.extermal evidence of worn , corroded, cracked or distorted hook fixing block,
gears, bearings, chain stop ball and hook retainer.
3.extemal evidence of damage or excessive wear of the lift-wheel. Widening and
deepening of pockets may cause chain to lift-up in the pockets and cause binding
between lift-wheel and chain guide or between lower sheave and hook block.
Check chain guide for wear or burring where the chain enters the hoist .severely
worn or damaged parts should be replaced.
4.external evidence of excessive wearing of brake parts. Check the control station
push buttons to make sure they operate freely and spring back when released.
5.check power cord, control cord and control ststion for damaged insulation.
6.check the chain pin or dead end pin and chain stop for wear and cracks. Any
deficiencies noted must be corrected before the hoist is returned to service.
Hook inspection
Hook damaged for chemicals, deformations or cracks or than have more than a
10°，twist from the plane of the unbent hook or excessive throat opening indicates
abuse or overloading of the unit.
Check to make sure that the latch is not damaged or bent and that it operates
properly with sufficient spring pressure to keep the latch tightly against the lip of
the hook and allow the latch to spring back to the tip when released. If the latch
does not operate properly, it should be replaced.
Chain inspection.
Nicks, gouges, twisted links , weld spatter,
corrosion pits, striations, cracks in weld
areas, wear and stretching. Chain with any
one of these defects must be replaced.
Lubricate the chain using
3#calcium-based grease after 200 per
cycles. Life of chain is 50000cycles.
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