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Table 6. Minimum Frequent Inspections
Type of Service
Normal
Heavy
Severe
Table 7. Minimum Periodic Inspections
Type of Service
Normal
Heavy
Severe
VARIABLE SPEED ELECTRIC CHAIN HOIST WITH
OPTION
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 - see page 14.
d) Load chain for adequate lubrication, as well as for signs of wear, damaged links or foreign matter - see page 16.
e) Load chain for proper reeving and twists.
a) All items listed in Table 6 for 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, and dead end
block and chain pin.
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 damage or excessive wear of the liftwheel and hook block sheave chain pockets. Widening and
deepening of the pockets may cause the chain to lift up in the pocket and result in binding between liftwheel and chain
guides or between the sheave and hook block. Also, check the chain guide for wear or burring where the chain enters
the hoist. Severely worn or damaged parts should be replaced.
f) External evidence of excessive wear of brake parts - see page 18.
g) External evidence of pitting or any deterioration of contactor contacts. Check the operation of the control station, making
sure the buttons operate freely and do not stick in either position.
h) Inspect the electrical cords and cables and control station enclosure for damaged insulation.
i) Inspect trolley trackwheels for external wear on tread and flange and for wear on internal bearing surfaces as evidenced
by a loose stud. Check suspension components for damage, cracks, wear and operation. Also, check suspension adapter
screws for proper tightness - see page 9.
j) Inspect the loose end link, loose end screw and dead end block on double-reeved units. Replace worn or distorted parts.
k) Inspect the suspension lug or hook for excess free play or rotation. Replace worn parts as evidenced by excess free play
or rotation.
l) Inspect for signs of lubricant leaks at the gasket between the gear housing and back frame. Tighten screws holding back
frame to gear housing. If leak persists, repack housing and gears with grease and install a new gasket.
Item
Item
15
P/N: 192047082 (REV AD) 627NH March 2022
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