Zoomlion ZCC1100, Operator'S Manual, Page: 209 / 291

Operator’s Manual for Crawler Crane
Operator’s Manual for Crawler Crane
Assembly
and
Dism
antling
5-3
5.1.3 Checking wire rope, load hook, rope pulley and anchoring rod
5.1.3.1 Checking wire rope
The ropes must be checked by an expert before assembly and after certain working period in
order to detect possible damage or wear and tear at an early stage.
The rope must be removed immediately and replace it with a new one if any of the following
damage is detected. (For details, please refer to Maintenance Manual .)
a) 10% of a twist (except filled steel wire) in the wire rope breaks.
b) Breakage of a strand.
c) Wear and tear in the outer wire rope reaches 4% of its diameter, or reduction in the rope
diameter by 7% of the nominal size.
d) Rope deformation.
The replacement rope must comply with the original rope’s specifications, including the
elongation rate of length and diameter. The lowering limit switch must be readjusted if a new
hoisting rope is used.
Worn rope pulley must be repaired or changed prior to fitting a new hoisting rope. If this is not
done, the new hoisting rope will be damaged.
5.1.3.2 Checking load hook
Check load hook according to the following items:
a) Check load hook for distortions, e.g., at the hook jaw.
b) Check all bolts and screws, and ensure all cotter pins are complete and open.
c) Check that the rotary connection of load hook can move easily, and the clearance is not
too large.
d) Check the easy rotation of load hook: Rotate load hook by hand. If it is stiff, it indicates that
the bearing has been damaged.
e) Check safety catch for completeness and functional work.
f) Check load hook for corrosion and wear.
5.1.3.3 Checking rope pulley
Check rope pulley according to the following items:
a) Check rope pulley for damage and cracks.
b) If rope pulleys have been hit during crane operation (for example on buildings) or if they
were subjected to other stress factors, they must be then extensively checked for damage
or cracks before using next time.
c) Check for wear on the rope groove. Replace the pulley if the rope pulley has been worn
down more than 1/4 of the rope diameter.
d) If any damage or cracks are found, then the rope pulley must be replaced immediately. If
this is not observed, there is great danger of causing a serious accident.
e) Check rope pulley for tight fit. Loose and shaken rope pulley indicates that the bearing and
bearing bush are damaged.
For reference only.
Operators manual should be consulted and adhered to.