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NATIONAL CRANE
Published 11-01-2020 Control # 710-00
5-11
NBT60XL OPERATOR MANUAL
LUBRICATION PROCEDURE AND CHARTS
5
WIRE ROPE LUBRICATION
Wire rope is lubricated during manufacture and the lubricant
applied does not last the life of the rope. The wire rope must
be lubricated as part of a regularly scheduled maintenance
program. The lubricant applied must be compatible with the
original lubricant and not hinder visual inspection of the rope.
Consult the rope manufacturer for proper lubricant. The
sections of rope which are located over sheaves or
otherwise hidden during inspection and maintenance
procedures require special attention.
The object of rope lubrication is to reduce internal friction and
to prevent corrosion. The type and amount of lubrication
applied during manufacture depends on the rope size, type,
and anticipated use. This lubrication provides the finished
rope with protection for a reasonable time if the rope is
stored under proper conditions. When the rope is put into
service, periodic applications of a suitable rope lubricant are
necessary. Characteristics of a good wire rope lubricant are
that it should be:
•
free from acids and alkalis.
•
have sufficient adhesive strength to remain on the rope.
•
of a viscosity capable of penetrating the interstices
between wires and strands.
•
not be soluble in the medium surrounding it under the
actual operating conditions (example: Water).
•
have a high film strength.
•
resistant to oxidation.
Before applying lubrication, accumulations of dirt or other
abrasive material should be removed from the rope. Clean
with a stiff wire brush and solvent, compressed air, or live
steam. Lubricate the rope immediately after the rope is
cleaned. Techniques that can be used include:
•
bath
•
dripping
•
pouring
•
swabbing
•
painting
•
pressure spray
Whenever possible, the lubricant should be applied at the
top of a bend in the rope, because at that point the strands
are spread by bending and are more easily penetrated.
There should be no load on the rope while it is being
lubricated. The service life of wire rope is directly
proportional to the effectiveness of the method used and
amount of lubricant that reaches the working parts of the
rope.
CARWELL
®
RUST INHIBITOR
Protecting Cranes From Rusting
National Crane Group's cranes are manufactured to high
quality standards, including the type of paint finish
demanded by today's industry. In partnership with our paint
supplier, we are also doing our part to help prevent
premature corrosion of cranes.
National cranes will be treated with a rust inhibitor called
Carwell
T32-CP-90. While a rust inhibitor cannot guarantee
that a machine will never rust, this product will help protect
against corrosion on National cranes that are treated with
this product.
Carwell is a treatment, not a coating. It contains no silicones,
solvents, CFCs or anything that would be classified as
hazardous under OSHA Regulation 29CFR-19-10.1200. The
product is a liquid blend of petroleum derivatives, rust
inhibitors, water-repelling and water-displacing agents.
Special equipment is used to spray a light film onto the entire
undercarriage and various other areas of each new crane
prior to shipment. When applied the product has a red tint to
FIGURE 5-7
Fo
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Reference
Only
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