M A E D A Crawler Crane 6.18 IRREGULAR MAINTENANCE
5/2020 CC1908S-1 6-75
MAINTENANCE EVERY
6,000 HOURS
[1] DPF soot filter inspection/cleaning
Special tools are required for inspection. Contact
us or our sales service agency for servicing.
IRREGULAR
MAINTENANCE
WIRE ROPE
WIRE ROPE REPLACEMENT
CRITERIA
IMPORTANT
• The criteria for replacing wire rope apply to
all the wire ropes used for winching,
telescoping the boom, and slinging.
• Measure the diameter of the wire rope at
points where the wire repeatedly runs
through the sheave. A mean value needs to
be determined from measurements in three
directions.
• Do not use old wire rope even if it has not
been used.
• For details on wire rope replacement, refer
to "6.18.1.4 WINCH WIRE ROPE
REPLACEMENT" on P. 6-79.
• Contact us or our sales service agency for
wire rope replacement or repair.
[1] Wire rope nominal dimensions
• Wire rope for winch:
IWRC 6 × Fi (29) 0/0 φ10 × 160 m
• No.5 rope for pulling out boom:
IWRC 6 × Fi (29) 0/0 φ12.5
• No.5 rope for pulling in boom:
IWRC 6 × Fi (29) 0/0 φ9
• Wire rope for fly jib derricking:
IWRC 6 × Fi (29) 0/0 ⌀14 mm × 8.67 m
[2] Wire rope replacement criteria
Wire rope suffers fatigue over time.
Replace the wire rope if any of the following
conditions apply:
1. If the number of broken wires is equal to or
greater than the following ratio with respect to
the total number of elemental wires in the
outermost strands (excluding filler wires):
• 10 % or more over a single twist of rope.
However, if breakage occurs in a single
strand only, the ratio should be 5 % or
more.
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