MAINTENANCE
WARNING
•
Never perform maintenance on the hoist while it is supporting a load.
Before performing maintenance, tag controls:
WARNING - DO NOT OPERATE EQUIPMENT BEING REPAIRED.
•
Only allow personnel instructed in service and repair of this hoist to
perform maintenance.
•
After performing any maintenance on the hoist, dynamically test hoist to
100% of its rated capacity, in accordance with ASME B30.16 standards,
before returning hoist to service. Testing to more than 100% of rated
capacity may be required to comply with standards and regulations set
forth in areas outside of the USA.
•
Shut off air system and depressurize air lines before performing any
maintenance.
•
Use of other than genuine Ingersoll Rand replacement parts may result in
safety hazards, decreased performance and increased maintenance and
may invalidate all warranties.
NOTICE
•
When reading the instructions, refer to exploded diagrams in Parts
Information Manuals when applicable.
n
Load Chain Care
Keep the chain well lubricated as instructed in the “LUBRICATION” section. Never
operate a hoist when the load chain does not flow freely and smoothly into and out
of the chain wheel, or when it makes noises indicative of binding or other
malfunctions.
n
Chain Replacement
Refer to “INSPECTION” section for information on load chain inspection. Excessive
chain wear cannot be detected by casual observation. The chain is case hardened
to a depth of 0.010 in. to 0.012 in. (0.25 to 0.30 mm) and once this case is worn
through, wear will progress rapidly and the strength of the chain will be considerably
reduced. Further, the chain will no longer fit the chain wheel properly, greatly
increasing the chance of malfunction and chain breakage. One chain wheel will
outlast several chains if the chain is replaced as recommended. The use of a worn
chain will cause the chain wheel to wear rapidly. If the chain is visibly damaged,
examine the chain wheel and chain guard. Install a new chain wheel if the old one
is visibly worn. Install a new guard if the old one is broken or distorted.
n
Single Line (fall) Hoists, Method 1
1. Remove the brake spring and piston housing, brake discs and brake plates to
expose the brake driver.
2. At the side of the chain wheel opposite the chain anchor bolt, engage the first
link of chain in a pocket of the chain wheel FLAT SIDE DOWN (Refer
Dwg. MHP3255 on page 6). The weld on the second link must face away from
the powered chain wheel. Refer Dwg. MHP0472 on page 7).
3. Rotate the brake driver by hand to thread the chain through the hoist.
4. Keep the chain straight and do not twist it. Attach the free end of the chain using
the chain anchor bolt, washers and spacer (Dwg. MHP3256). Clean the brake
parts and inspect them for excessive wear before assembling.
Chain Wheel
Weld on standing
link must be to
outside of top drive
chain wheel
Install first load
chain link in chain
wheel pocket "Flat
Side Down"
Top Hook
A
B
C
D
(Dwg. MHP3255)
Chain Wheel
Check Chain is
not Twisted
Attach uploaded
Chain End to Hoist
Top Hook
A
B
C
D
(Dwg. MHP3256)
Top Hook
Chain Anchor
Bracket
Chain Wheel
Attach
Unloaded
Chain End
to Hoist
Check Chain is
not Twisted
Weld on standing
links must be to
outside of top
chain wheel and
to inside of lower
pocket wheel
Bottom Hook
Pocket Wheel
A
B
G
C
D
E
F
(Dwg. MHP3257)
6
Form 47099007 Edition 3
