Harrington Hoists and Cranes (N)ER Hoist - ((N)ER1) User Manual
Page 25
25
Table 5-3
Hoist Inspection Methods and Criteria
Item Method
Criteria
Action
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.
Tighten 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 - Idle Sheave
and Axle (Bottom
Hook on Double Fall
Hoist)
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.
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 5-5.
The "d"
dimension should not be less than minimum value
listed in
Table 5-5.
Replace. Inspect
Load Sheave (and
Idle Sheave for
double fall hoist).
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 Idle Sheave for double fall hoist) -
refer to
Section 6.4
. Chain, Chain Springs,
Cushion Rubbers, Striker Plates, and Stoppers
should be installed properly - refer to
Section 3.2
.
Reeve/Install chain
properly.
Chain Container
(optional)
Visual
Container should not be damaged. Brackets
should not be deformed or missing.
Replace.
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.