Harrington Hoists and Cranes (N)ER Hoist - ((N)ER2) - Manual (Page 32)

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Table 5-3 Hoist Inspection Methods and Criteria
Item Method Criteria Action
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 - Yoke Assembly Visual
Should be free of significant rust, weld splatter,
nicks, and gouges. Holes should not be
elongated. The difference between dimensions
“a” (vertical) and “b” (horizontal) must be within
.020” (0.5mm), refer to Figure 5-1. Fasteners
should not be loose, and there should be no gap
between mating parts.
Measure, tighten, or
replace as required.
Hooks – Top Shaft
Retainer Clip
Visual
Should not have any deformation, abrasion, or
damage. Refer to Figure 5-2.
Replace.
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 6.5. Chain, Chain Springs,
Cushion Rubbers, Striker Plates, and Stoppers
should be installed properly - refer to Section 3.2.
Reeve/Install chain
properly.