Harrington Hoists and Cranes (N)ER Hoist - ((N)ER1) - Manual (Page 24)

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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 B30.16 for the Frequent and Periodic Inspection. In accordance with ANSI/ASME
B30.16, these inspections are not intended to involve disassembly of the hoist. 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 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. Repair or replace
as required.
Limit Switch Function Proper operation. Actuation of limit switch should
stop hoist. Repair or replace
as required.
Limit Lever
Assembly Visual, Function Lever should not be bent or significantly worn and
should be able to move freely. Replace.
Braking System
Operation Function Braking distance with rated capacity should not
exceed 3% of the lifting speed (approximately two
chain links). Repair or replace
as required.
Hooks - Surface
Condition Visual Should be free of significant rust, weld splatter,
deep nicks, or gouges. Replace.
Hooks - Fretting
wear Measure The "u" and "t" dimensions should not be less
than discard value listed in
Table 5-4
Replace.
Hooks - Stretch Measure The "k" dimension should not be greater than
1.15 times that measured and recorded at the
time of purchase (See
Section 3.6 ). If recorded
"k" values are not available for hooks when new,
use nominal "k" values from
Table 5-4.
Replace.
Hooks - Bent Shank
or Neck Visual Shank and neck portions of hook should be free
of deformations. Replace.