Harrington Hoists and Cranes AHM Hoist - Manual (Page 31)

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Table 5-3 Hoist Inspection Methods and Criteria
Item Method Criteria Action
Hooks - Bent Shank
or Neck Visual Shank and neck portions of hook should be free
of deformations Replace.
Hooks - Yoke
Assembly Visual Should be free of significant rust, weld splatter,
nicks, gouges. Holes should not be elongated,
fasteners should not be loose, and there should
be no gap between mating parts. Clean/Lubricate, or
replace as required.
Hooks - Swivel
Bearing Visual, Function Bearing parts and surfaces should not show
significant wear, and should be free of dirt, grime
and deformations. Hook should rotate freely with
no roughness. Clean/lubricate, or
replace as required.
Hooks - Hook
Latches Visual, Function Latch should not be deformed. Attachment of
latch to hook should not be loose. Latch spring
should not be missing and should not be weak.
Latch movement should not be stiff - when
depressed and released latch should snap
smartly to its closed position. Replace.
Load Chain -
Surface Condition Visual Should be free of rust, nicks, gouges, dents and
weld splatter. Links should not be deformed, and
should not show signs of abrasion. Surfaces
where links bear on one another should be free of
significant wear. Replace.
Load Chain - Pitch
and Wire Diameter Measure The “P” dimension should not be greater than
maximum value listed in Table 5-7. The “d”
dimension should not be less than minimum value
listed in Table 5-7. Replace, inspect
Load Sheave.
Load Chain -
Lubrication Visual, Auditory Entire surface of each chain link should be coated
with lubricant and should be free of dirt and grime.
Chain should not emit cracking noise when
hoisting a load. Clean/lubricate
(see Section 6.0).
Load Chain -
Reeving Visual Chain should be reeved properly through Load
Sheave and properly attached to the hoist body -
refer to Section 7.2. Install chain
properly.
Chain Container
(optional) Visual Container should not be damaged. Brackets
should not be deformed or missing. Replace
Bolts, Nuts and
Rivets Visual, Check
with Proper Tool Bolts, nuts and rivets should not be loose. Tighten or replace
as required.
Housing and
Mechanical
Components Visual, Auditory,
Vibration,
Function Hoist components including load blocks,
suspension housing, chain attachments, clevises,
yokes, suspension bolts, shafts, gears, bearings,
pins and rollers should be free of cracks,
distortion, significant wear and corrosion.
Evidence of same can be detected visually or via
detection of unusual sounds or vibration during
operation. Replace.