User Manual

P/N: 192047082 (REV AA) 627NH January 2018
15
Table 7. Minimum Frequent Inspections
TYPE OF SERVICE ITEM
Normal Heavy Severe
Monthly
Weekly to Monthly
Daily to Weekly
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 17.
e) Load chain for proper reeving and twists.
Table 8. Minimum Periodic Inspections
TYPE OF SERVICE ITEM
Normal Heavy Severe a) All items listed in Table 7 for frequent inspections.
Yearly
Every 6 Months Every 3 Months
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 17.
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 ange and for wear on internal bearing
surfaces as evidenced by a looseness on the stud. 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.