The overload clutch was set to slip at a nominal setting of 150% of rated load with a range of ±20%.
INSPECTION
Inspection information is based in part on American Standards of Mechanical Engineers Safety Codes B30.16.
WARNING
• All new or repaired equipment should be inspected and tested by Ingersoll Rand trained technicians to
ensure safe operation at rated specifications before placing equipment in service.
• Never use a hoist that inspection indicates is damaged.
Frequent and periodic inspections should be performed on equipment in regular service. Frequent inspections are
visual examinations performed by operators or Ingersoll Rand trained inspectors and include observations made
during routine equipment operation. Periodic inspections are thorough inspections conducted by Ingersoll Rand
trained technicians.
ASME B30.16 states inspection intervals depend upon the nature of the critical components of the equipment and the
severity of usage. Refer to ‘Inspection Classifications’ chart and ‘Maintenance Intervals’ chart in Product Maintenance
Information Manual for recommended maintenance intervals. Careful inspection on a regular basis will reveal
potentially dangerous conditions while still in the early stages, allowing corrective action to be taken before the
condition becomes dangerous.
Deficiencies revealed through inspection, or noted during operation, must be reported to designated personnel
trained in safety, operation and maintenance of this hoist. A determination as to whether a condition constitutes a
safety hazard must be decided, and the correction of noted safety hazards accomplished and documented by written
report before placing the hoist in service.
Frequent Inspection
On hoists in continuous service, frequent inspection should be made at the beginning of each shift. In addition, visual
inspections should be conducted during regular service for any damage or evidence of malfunction.
1.
Operations. Check for visual signs or abnormal noises which could indicate a potential problem. Do not operate
a hoist unless the chain feeds through the hoist and hook block smoothly. Listen for “clicking”, binding or
malfunctioning. The clicking sound of the pawl on the ratchet gear is normal when a load is being raised. If chain
binds, jumps, or is excessively noisy, clean and lubricate the chain. If problem persists, replace the chain. Do not
operate the hoist until all problems have been corrected. Check that hand chain moves freely and without binding
or excessive drag. Hook should stop moving when hand chain stops moving
2.
Hooks. Check for wear or damage, increased throat width, bent shank or twisting of the hook. Replace if hook
latch snaps past tip of hook. Check hooks swivel freely. Replace hooks which exceed the throat opening. Refer
to Dwg. MHP3272 on page 12, A. Throat Width. B. Distance between two indicator points. Replace hooks which
exceed a 10° twist. Refer to Dwg. MHP0111 on page 10, A. Twisted DO NOT USE; B. Normal Can Be Used. If hook
latch snaps past tip of hook, the hook is sprung and must be replaced. Refer to the latest edition of ASME B30.10
‘HOOKS‘ for additional information. Check hook support bearings for lubrication or damage. Ensure that they
swivel easily and smoothly. Refer to Product Maintenance Information Manual.
3.
Hook Latches. Check operation of the hook latches. Replace if necessary.
4.
Chain. Examine each of the links for bending, cracks in weld areas or shoulders, traverse nicks and gouges, weld
splatter, corrosion pits, striation (minute parallel lines) and chain wear, including bearing surfaces between chain
links (Refer to Dwg. MHP0102 on page 10). Replace a chain that fails any of the inspections. Check chain
lubrication and lubricate if necessary. Refer to “Load Chain” in section “LUBRICATION” on page 9.
CAUTION
• The full extent of chain wear cannot be determined by visual inspection. At any indication of chain wear
inspect chain and load sheave in accordance with instructions in “Periodic Inspection.”
• A worn load chain may cause damage to the load sheave. Inspect the load sheave and replace if damaged
or worn.
Form 48489223 Edition 2
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