Harrington Hoists and Cranes LB Lever Hoist - (L5) User Manual
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5.5
Occasionally Used Hoists
5.5.1
Hoists that are used infrequently shall be inspected as follows prior to placing in service:
Hoist Idle More Than 1 Month, Less Than 1 Year: Inspect per FREQUENT Inspection criteria in
Section 5.3.
Hoist Idle More Than 1 Year: Inspect per PERIODIC Inspection criteria in Section 5.4.
5.6
Inspection Records
5.6.1
Dated inspection reports and records should be maintained at time intervals corresponding to those
that apply for the hoist‟s PERIODIC interval per Section 5.2.4. These records should be stored where
they are available to personnel involved with the inspection, maintenance, or operation of the hoist.
5.6.2
A long range chain inspection program should be established and should include records of
examination of chains removed from service so a relationship can be established between visual
observation and actual condition of the chain.
5.7
Inspection Methods and Criteria
5.7.1
This section covers the inspection of specific items. The list of items in this section is based on those
listed in ANSI/ASME B30.21 for the Frequent and Periodic Inspection.
5.7.2
Frequent Inspection - Not intended to involve disassembly of the hoist. Disassembly for further
inspection would be required if only if frequent inspection results so indicate. Disassembly and further
inspection should only be performed by a qualified person trained in the disassembly and re-assembly
of the hoist.
5.7.3
Periodic Inspection - Disassembly of the hoist is required. Disassambly should only be performed by a
qualified person trained in the disassembly and re-assembly of the hoist.
Table 5-3 Hoist Inspection Methods and Criteria
Item
Method
Criteria
Action
Functional operating
mechanisms.
Visual, Auditory
Mechanisms should be properly adjusted and
should not produce unusual sounds when operated.
Components should not be deformed, scarred or
show significant wear. Refer to Figures 5-1 and 5-2.
Repair or replace
as required.
Braking System
–
Components
Visual
Brake Pawl, Pawl Shaft and Pawl Spring should not
be deformed, scarred or show significant wear.
Refer to Figures 5-1 and 5-3.
Replace
Braking System
–
Friction Plate
Visual, Measure The surface of the friction plate should be free of
grease, oil, scars, gouges and wear and have
uniform thickness. The outer thickness should not
be thinner than the inner thickness. The thickness
should not be less than the discard value listed in
Table 5-4.
Replace
Braking System
–
Friction Disc
Visual
The surface of the friction plate should be free of
scars, gouges and wear.
Replace
Braking System
–
Bushing
Measure
The bushing should have uniform thickness. The
“A” dimension should not be less than the discard
value listed in Table 5-5.
Replace
Braking System
–
Bushing
Visual
When slightly heated, the bushing should be so
lubricated that lubricant oozes off the surface.
Soak bushing in
machine oil for one
day.
Braking System
–
Ratchet Disc
Measure
The “D” dimension should not be less than the
discard value listed in Table 5-6.
Replace