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Section 1 Maintenance
SCC1000C Crawler Crane — Maintenance Manual
WARNING
DANGER
14�3 Wire Ropes
-- Danger of protruding metal wires in the
rope�
-- When dealing with wire ropes, the
protruding wires may cause injury�
-- It is required to wear gloves to protect
the hands�
-- There is a danger of being scraped or
scratched
-- Danger of dragging or entanglement.
-- When implementing maintenance,
inspection and installation services,
special attention should be paid to
danger of being entangled or dragged
in between the following equipments:
-- Wire ropes on winches
-- Wire ropes on pulleys of main boom or
other boom frames
-- Wire ropes on hook block pulleys
-- They must be handled with great care�
Effect of Lubricating Methods on Life Span of Wire Ropes
X Interval bending number (%)
Y Tension stress (N/mm
2
) (psi)
A Lubrication and repeated lubrication
B Lubrication
C Remove oil contaminant
TY0149
X
0
Y
A
B
C
100(1.45)
100(1.45)
150(2.18)
200(2.9)
200(2.9) 300(4.35) 400(5.8) 500(7.25)
50(0.73)
14�3�1 Lubricating the Wire Ropes
During manufacturing, the wire ropes are
sufficiently lubricated to prevent rust and improve
friction coefcient of the wire ropes internally, and
between the wire rope and pulley or between wire
rope and winch. This primary lubrication can only
last for a limited period of time. Therefore, the wire
rope should be lubricated regularly from time to
time.
The wire rope should be lubricated regularly
according to the actual working conditions,
especially the bending areas. If the wire rope
cannot be lubricated during operation, expected
service life will be shortened. Therefore, it is
required to pay closer attention to the wire ropes.
See the following gure for effect of lubrication and
repeated lubrication on the life span of wire ropes
(Fig. TY0149).
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