Maeda CC423S-1, Operation Manual

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[1] INSPECTION AROUND CRANE
• Look out the surroundings and lower parts of the boom and boom mounts to check for oil leaks. In
particular, thoroughly inspect the derricking cylinder and the lower part of the winch motor around the
mounts. Repair if any abnormality is found.
• Check parts of the mount for cracks, remarkable deformation and contamination. Check for loose, lost or
damaged bolts, nuts, pins or pipe connectors. Repair if any abnormality is found.
• Check for any cracks, significant deformation or dirt in each boom. Check for loose, lost or damaged bolts,
nuts, pins or pipe connectors. Especially, check the boom support pin or derricking cylinder support pin for
any significant wears or damages. Repair if any abnormality is found.
• Check the wire rope for the over-hoist detection weight of the over-hoist detector at the boom tip for
remarkable damage and deformation.
Repair if any abnormality is found.
• Check the working lamp for breakage, remarkable deformation and contamination. Repair if any abnormality
is found. Clean as necessary.
• Check for slack wiring, lose connections and any trace of burning. Repair if any abnormality is found.
[2]
INSPECTION OF WIRE ROPE
• Refer to “Operation 4. Handling Wire Rope” for details.
• Check wire ropes for damage, deformation, wear, twist, kinks and corrosion. Replace if any abnormality
is found.
• Check the connection of wire rope ends. • Replace if any loose wire rope ends are found.
•
Check for any irregular winding of wire rope (winch drum part). If you find irregular winding, rewind it.
[3] INSPECTION OF HOOK BLOCK
• Check that the wire rope latch (1) is working properly. Repair
if any abnormality is found.
• Rotate the hook and check that it rotates smoothly and there
is no noise coming from the trunnion.
Repair if any abnormality is found.
• Check the hook for any cracks or significant deformation.
Repair if any abnormality is found.
• Replace the hook if the dimension, a, between punch marks
engraved on the hook is 105 mm or more and the dimension,
b, of the lower part of the hook is 49.5 mm or less.