Harrington Hoists and Cranes ED-DA Hoist - (ED3) - Manual (Page 28)

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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 - 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.
Cylinder Hook
Chuck - Ball Guide
(DA Model)
Visual, Function
Ball Guide should not be worn or deformed. Ball
Guide should interact properly with the Spring
Collar to retain the hook shank.
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 5-6.
The "d"
dimension should not be less than minimum value
listed in Table 5-6.
Replace. Inspect
Load Sheave by
qualified person.
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 6.1).
Load Chain -
Reeving
Visual
Chain should be reeved properly through Load
Sheave - refer to Section 6.2. Chain, Cushion
Rubbers, Washers and Stoppers should be
installed properly
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.
Bolts, Nuts and
Rivets Visual, Check
with Proper Tool
Bolts, nuts and rivets should not be loose.
Tighten or replace
as required.
Motor Brushes Measure, Visual
The "F" dimension should not be less than
minimum value listed in Table 5-4.
Replace.
Contactor Contacts Visual
Contacts should be free of significant pitting or
deterioration
Replace.