Harrington Hoists and Cranes TNER Theater Hoist - Manual (Page 21)

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.
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