Harrington Hoists and Cranes SHB Trolley - Manual (Page 27)

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Table 5-3 Hoist Inspection Methods and Criteria
Item Method Discard Limit/Criteria Action
Hook – Bent Shank
or Neck Visual Shank and neck portions of hook should be free of
deformations. Replace.
Hook – Swivel 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. See
Figure 5-1 .
Clean/lubricate, or
replace as required.
Hook – Yoke
Assembly Visual Should be free of significant rust, weld splatter,
nicks, and gouges. Holes should not be elongated,
fasteners should not be loose, and there should be
no gap between mating parts. Tighten or replace
as required.
Hook – Idle Sheave
and Shaft (on
Lower Suspension
Shaft) Visual, Function Pockets of Idle Sheave should be free of significant
wear. Idle Sheave surfaces should be free of nicks,
gouges, dirt, and grime. Bearing parts and
surfaces of Idle Sheave and Axle should not show
significant wear. Idle Sheave should rotate freely
with no roughness or significant free play. Clean/lubricate, or
replace as required.
Hook – 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 – Pitch
and Wire Diameter Measure The "P" dimension should not be greater than
discard value listed in
Table 5-5 . The "d" dimension
should not be less than discard value listed in Table
5-5 .
Replace. Inspect
Load Sheave (and
Idle Sheave for
multiple fall hoists).
Load Chain –
Surface Condition Visual Should be free of gouges, nicks, dents, weld
splatter, and corrosion. 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 –
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 /installed properly and free
of twists. Refer to
Section 3.2 .
Reeve/Install chain
properly.
Lifting System –
Components Visual, Function Components should not be deformed, scarred, or
show significant wear. Replace.
Load Sheave Visual Pockets of Load Sheave should be clean and free
of significant wear. Replace.
Hand Wheel Visual Large wear or deformation on the surface of hand
wheel. The hand wheel touches the cover. Replace.