10
Minimum Frequent Inspections
Type of Service
Item
Normal
Heavy
Severe
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 11.
d) Load chain for adequate lubrication, as well as for signs of wear,
damaged links or foreign matter – see page 11.
e) Load chain for proper reeving and twists.
Table 3
Yearly
Weekly
to
Yearly
Daily
to
Weekly
Minimum Periodic Inspections
Type of Service
Item
Normal
Heavy
Severe
a) All items listed in Table 3 for frequent inspections.
b) External evidence of loose screws, bolts or nuts.
c) External external evidence of worn, corroded, cracked or distorted
hook block, suspension bolts, gears, bearings, loose end chain, stop
block, loose end block and pins, and dead end block and pin
(double reeved units).
d) External evidence of damage to hook retaining nut or collar and pin.
Also check the upper suspension adapter making sure it is fully seat-
ed in the hoist frame and retighten the screws to the recommended
seating torque (see page 4). If a condition of loose screws persists,
replace the self-locking nuts in the frame.
e) External evidence of damage or excessive wear of the liftwheel and
hook block sheave (double reeved units) 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 (double reeved units).
Also, check the chain guides for wear or burring where the chain
enters the hoist.
Severely worn or damaged parts should be replaced.
f) External evidence of excessive wear or brake parts and brake
adjustment – see page 12.
g) External evidence of pitting or any deterioration of contactor contacts.
h) Inspect the electrical cords and cables for damaged insulation.
i)
Inspect trolley trackwheels for external wear on tread and flange,
and for wear on internal bearings surfaces as evidenced by a loose-
ness on the stud.
Table 4
Yearly
Every
Six
Months
Every
Three
Months
