Manitowoc NBT60XL, Руководство оператора

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NATIONAL CRANE
Published 11-01-2020 Control # 710-00
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NBT60XL OPERATOR MANUAL SAFETY PRECAUTIONS
2
ASME and similar organizations. See the Service
Manual for inspection procedures.
When inspecting ropes and attachments, keep all parts
of your body and clothing away from rotating hoist drums
and all rotating sheaves. Never handle the wire rope
with bare hands.
Some conditions that lead to problems in wire rope
systems include:
- Sheaves that are too small, worn or corrugated
cause damage to a wire rope.
- Broken wires mean a loss in strength.
- Kinks permanently damage a rope and must be
avoided.
- Ropes are damaged by knots. Rope with knots must
never be used.
- Environmental factors such as corrosive conditions
and heat can damage a wire rope.
- Lack of lubrication can significantly shorten the
useful life of a wire rope.
- Contact with electrical wires and resulting arcing will
damage a wire rope.
• An inspection should include verification that none of the
specified removal criteria for this usage are met by
checking for such things as:
- Surface wear; nominal and unusual.
- Broken wires; number and location.
- Reduction in diameter.
- Rope stretch (elongation).
- Integrity of end attachments.
- Evidence of abuse or contact with another object.
- Heat damage.
- Corrosion.
NOTE: A more detailed rope inspection procedure is given
in the
Service Manual .
• When a rope has been removed from service
because it is no longer suitable for use, it must not
be reused on another application.
Installing a new rope:
• Keep all parts of your body and clothing away from
rotating hoist drums and all rotating sheaves.
• Never handle the wire rope with bare hands.
• Follow proper instructions for removing rope from a reel.
• Apply back tension to the storage/payoff reel of the new
rope to ensure tight, even, spooling onto the hoist drum.
• Operate the new rope—first through several cycles at
light load—then through several cycles at intermediate
load, to allow the rope to adjust to operating conditions.
When using a wedge socket:
• Always inspect socket, wedge, and pin for correct size
and condition.
• Do not use parts that are damaged, cracked, or
modified.
• Assemble the wedge socket with live end of rope aligned
with the centerline of pin and make sure that proper
length of tail (dead end) protrudes beyond the socket.
Sheaves
Inspect the boom nose and hook block sheaves for proper
operation, excessive wear, and damage every 50 hours or
weekly. Inoperable, damaged and/or worn sheaves cause
rapid deterioration of rope.
Make sure that sheaves carrying ropes that can be
momentarily unloaded are equipped with close fitting guards
or other devices to guide the rope back into the groove when
the load is reapplied. Make sure that sheaves in the lower
load block are equipped with close fitting guards that will
prevent the ropes from becoming fouled when the block is
lying on the ground with loose ropes.
To attain maximum hoist rope life and minimize hook block
rotation, it is recommended that even numbers of parts-of-
line be used in multiple-part reeving whenever possible.
The use of nylon (polyamide) sheaves, as compared with
metallic sheaves, may change the replacement criteria of
rotation-resistant wire rope.
NOTE: The use of cast nylon (polyamide) sheaves will
substantially increase the service life of rope.
However, conventional rope retirement criteria
based only upon visible wire breaks may prove
inadequate in predicting rope failure. The user of
cast nylon sheaves is therefore cautioned that a
retirement criteria should be established based
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