Maeda MC815C, Operation Manual, Page: 271 / 426

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[1] INSPECTION AROUND CRANE
• Look around and under the boom or post for oil leak. Especially, check the bottom of winch
motor around the derricking cylinder or the post. Repair if any abnormality is found.
• Check for cracks or significant deformation or dirt in each post. Check for loose, lost or
damaged bolts, nuts, pins or pipe connectors. Especially, check for loose mounting bolts of the
post, slewing ring and reducing machine of slewing equipment. 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 ropes for over hoist weight in the boom tip of the hoist alarm equipment for
significant damages or deformation and if any abnormality is found, replace it. Repair if any
abnormality is found.
• Check for slack wiring, loose connections or any trace of burning. Repair if any abnormality is
found.
[2] INSPECTION OF WIRE ROPE
★
See “OPERATION 5. HANDLING WIRE ROPE” for details on wire rope.
• Check wire ropes for damage, deformation, wear, twist, kink 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 whether the latch of hook block (1) function
properly. Repair if any abnormality is found.
• Rotate the hook to see if it rotates smoothly and if
any noise comes out from the trunnion part.
Repair if any abnormality is found.
• Check for any cracks or significant deformation on
hooks.
Repair if any abnormality is found.
• Replace the hook when the dimension a between
punch marka imprinted on the hook becomes 122.4
mm or greater or the hook bottom dimension b
becomes less than 70.8 mm.
[4] INSPECTION AROUND OUTRIGGER
• Look around the bottom of outriggers for oil leak. Especially, check the bottom of outrigger
cylinder carefully. Repair if any abnormality is found.
• Check for any cracks or significant deformation or dirt in each outrigger rotary, outrigger, tray
and outrigger cylinder. Check for loose, lost or damaged bolts, nuts, pins or pipe connectors.
Repair if any abnormality is found.