Harrington Hoists and Cranes (N)ER Large Cap Hoist - ((N)ER2 - Manual (Page 15)

5.0 Inspection
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The information listed in this section is intended to supplement Section 5.7 of the ER2OM.
Table 5-3 Hoist Inspection Methods and Criteria
Use this table in conjunction with Table 5-3 of the ER2OM. The entries in this table replace in their entirety
the corresponding entries in Table 5-3 of the ER2OM.
Item Method Criteria Action
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.
Load Chain - Pitch
and Wire Diameter Measure The "P" dimension should not be greater than
maximum value listed in Table 5-5. The "d"
dimension should not be less than minimum value
listed in Table 5-5. Replace. Inspect
Load and Idle
Sheaves.
Load Chain –
Reeving and
Evening Visual Chain should be reeved properly through Load
and Idle Sheaves - refer to Section 6.4. Chain,
Chain Springs, Stoppers, and Chain Pin should be
installed properly - refer to Section 3.2. For
double body hoists, chain should be evenly
distributed – equal length of chain in each chain
container or equal lengths of chain on no-load
side of each hoist body. Reeve/Install chain
properly.
Lower hook until
lower limit switch is
activated on both
hoist bodies.
Chain Springs Visual
Chain springs should not be deformed or
compressed. Refer to Table 5-6 for Chain Spring
dimensions.
Replace.
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