12
Table 3. 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 13.
d)
Load chain for adequate lubrication, as well as for signs of wear, damaged links
or foreign matter–see page 15.
e)
Load chain for proper reeving and twists.
Daily
to
W
eekly
W
eekly
to
Monthly
Monthly
Table 4. Minimum Periodic Inspections
ITEM
Normal
Heavy
Severe
TYPE OF SERVICE
a)
All items listed in Table 3 for frequent inspections.
b)
External evidence of loose screws, bolts or nuts.
c)
External evidence of worn, corroded, cracked or distorted hook block, gears,
bearings, dead end block, dead end pin, dead end bolt and suspension components.
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 suspension adapter screw or dead end bolt is 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
guide 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, and brake adjustment—see
page 14.
g)
Check the operation of the control station making sure the paddles operate
freely and do not stick in either position.
h)
Check air supply hose and control hose for kinks, cuts, leaks and damage
i)
Inspect trolley trackwheels for external wear on tread and flange 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 sus-
pension adapter screw or dead end bolt for proper tightness—(see pages 4,
5,and 6).
j)
Inspect the loose end link, loose end screw, dead end block on double reeved
units and dead end plate on triple reeved units. Replace worn or distorted parts.
k)
Inspect the hook for excess free play or rotation. Replace worn parts as evidenced
by excess free play or rotation.
l)
Inspect for oil leaks at the gasket on either side of intermediate plate. Tighten
the screws used to attach the main housing and brake housing to intermediate
plate. If leak persists, disassemble hoist (see page 17) and replace gaskets.
m)
Inspect inside of motor and brake housings for presence of oil. Oil in motor
housing may be excess chain lubricant or a leaking seal. Wipe out oil and moni-
tor. If leak persists, replace seal (652-122 or 652-132). Oil in brake housing is due
to leaking seal. Replace seal (652-122 or 652-134).
n)
Inspect all splines for signs of wear and deterioration. Replace splined parts if
worn or damaged.
Y
early
Every
6
Months
Every
3
Months
