Harrington Hoists and Cranes SHB Trolley - Manual (Page 26)

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5.5 Occasionally Used Hoists
5.5.1 Trolley-hoists that are used infrequently shall be inspected as follows prior to placing in service:
„ Trolley-hoist Idle More Than 1 Month, Less Than 1 Year: Inspect per FREQUENT Inspection
criteria in
Section 5.3 .
„ Trolley-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 trolley-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 B30.16 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. Disassembly should only be performed by a
qualified person trained in the disassembly and re-assembly of the hoist.
5.7.4 In accordance with ANSI/ASME B30.16, these inspections are not intended to involve disassembly of
the trolley. Rather, disassembly for further inspection would be required if frequent or periodic
inspection results so indicate. Such disassembly and further inspection should only be performed by a
qualified person trained in the disassembly and re-assembly of the trolley.
Table 5-3 Hoist Inspection Methods and Criteria
Item Method Discard Limit/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. Repair or replace
as required.
Hook – Stretch Measure The "k" dimension should not be greater than 1.05
times that measured and recorded at the time of
purchase (See
Section 3.4 ). If recorded "k" values
are not available for hooks when new, use nominal
"k" values from
Table 5-4 .
Replace.
Hook – Fretting
wear Measure The "u" and "t" dimensions should not be less than
discard value listed in
Table 5-4 .
Replace.
Hook – Surface
Condition Visual Should be free of gouges, deep nicks, dents, weld
splatter, and significant corrosion. Replace.
Hook –
Deformation Visual Should be free of twists and deformations. See
Figure 5-1 .
Replace.