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2. ALL COMPONENTS. Inspect for wear, damage,
distortion, deformation and cleanliness. If external
evidence indicates the need, disassemble. Check gears,
shafts, bearings, sheaves, chain guides, springs and covers.
Replace worn or damaged parts. Clean, lubricate and
reassemble.
3. HOOKS. Inspect hooks for cracks. Use magnetic particle
or dye penetrant to check for cracks. Inspect hook retaining
parts. Tighten, repair or replace if necessary. Refer to the
latest edition of ASME B30.10 (Hooks) for additional hook
inspection information.
4. CHAIN SHEAVES. Check for damage or excessive wear.
Replace damaged parts.
5. BRAKE. Ensure proper operation. Brake should not slip
with test load ( rated capacity). If load test indicates the
need, disassemble. Brake discs must be free of excess oil,
any grease, unglazed, uniform in thickness and at least 5/64
in. (2 mm) thick. Check all other brake surfaces for wear,
deformation or foreign deposits. Inspect pawl brake. Teeth
of ratchet gear should be undamaged, and should stop gear
rotation in the counterclockwise direction. Check pawl
spring for damage. Clean and replace components as
necessary.
6. SUPPORTING STRUCTURE. If a permanent structure is
used inspect for continued ability to support load.
7. LABELS AND TAGS. Check for presence and legibility.
Replace if necessary.
8. END ANCHOR. Ensure end anchor on chain hoist is
engaged and unbent. Repair if damaged, replace if missing.
Refer to “Attaching End of Load Chain” in
“MAINTENANCE” section.
9. LOAD CHAIN. Measure the chain for stretching by
measuring across five link sections all along the chain
(refer to Dwg. MHP0041). When any five links in the
working length reach or exceed the discard length shown in
Table 3, replace the entire chain. Always use a genuine
Ingersoll-Rand Material Handling replacement chain.
(Dwg. MHP0041)
NOTICE
• Zinc plated chain for the MCH5 is designated by “ZP” at
the end of the part number.
Hoists not in Regular Service
1. A hoist that has been idle for a period of one month or
more, but less than one year should be given an inspection
conforming with the requirements of “Frequent Inspection”
before being placed in service.
2. A hoist that has been idle for a period of more than one
year should be given a complete inspection conforming
with the requirements of “Periodic Inspection” before being
placed in service.
3. Standby hoists should be inspected at least semiannually in
accordance with the requirements of “Frequent Inspection”.
In abnormal operating conditions equipment should be
inspected at shorter intervals.
General
Thread lubricant or an antiseize compound use is recommended
for threaded shafts, capscrews and nuts. Unless otherwise stated,
remove old lubricant, clean the part with an acid free solvent
and apply a new coating of lubricant to the part before assembly.
Gears (11 and 14)
Unscrew U-nuts (36), on the opposite side of the hoist as the
hand chain, and remove gear cover (17) and support plate (16).
Remove old grease and replace with new. For temperatures -20
°
to 50
°
F (-29
°
to 10
°
C) use EP 1 grease or equivalent. For
temperatures 30
°
to 120
°
F (-1
°
to 49
°
C) use EP 2 grease or
equivalent.
LUBRICATION
Load Chain
WARNING
• Failure to maintain clean and well lubricated load chain
may result in chain failure causing injury, death or
substantial property damage.
1. Lubricate load chain weekly, or more frequently,
depending on severity of service.
2. In a corrosive environment, lubricate more frequently than
normal.
3. Lubricate each link of the chain and apply new lubricant
over existing layer.
4. Lubricate hook and hook latch pivot points.
5. Clean chain with acid free solvent to remove rust or
abrasive dust build-up and lubricate the chain.
6. Use Ingersoll-Rand LUBRI-LINK-GREEN or a SAE 50
to 90 EP oil.