Maeda MC-305C-2 - Page 107

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[1] CHECKING AROUND CRANE
• Look around and below the boom and post and look for any oil leak or similar. Be especially careful to
check up the derrick cylinder and lower part of the winch motor near the post. If you find any abnormality,
repair.
• Check each part of the post for cracks, excessive deformation, contamination and others. In addition,
check bolts, nuts, pins and piping joints for any looseness, drop, damage and other matters. Be
especially careful to check for looseness of decelerator mounting bolt of the post, slewing ring or slewing
device. If you find any abnormality, repair.
• Check each part of the boom for cracks, excessive deformation, contamination and others. In addition,
check bolts, nuts, pins and piping joints for any looseness, drop, damage and other matters. Be
especially careful to check for excessive abrasion and damage of the boom support pin or derrick
support pin. If you find any abnormality, repair.
• Check for excessive damage and deformity of the over hoist weight wire rope of the overwinding alarm
device at the tip of the boom. If there is any abnormality, repair.
• Check for sagged electrical wire, loosened connection and trace of burns. If you find any abnormality,
repair.
[2] CHECKING WIRE ROPES
See " Operation 4. Handling Wire Ropes" for wire ropes.
• Check the wire ropes for damage, deformation, wear, twists, kinks, corrosion, etc. If you find any
abnormality, replace
• Check the bound condition of the wire rope ends. If you find any loosened wire rope end, replace.
• Check for irregular winding of the wire ropes (wind drum). If you find any irregular winding, rewind.
[3] CHECKING HOOK BLOCK
• Verify that the wire rope latch (1) functions normally. If there is
any abnormality, repair.
• Rotate the hook and verify that the hook rotates smoothly and
that trunnion does not emit any abnormal sound.
If there is any abnormality, repair.
• Check the hook for any crack or excessive deformation.
If there is any abnormality, repair.
• If dimension a between the punch marks punched on the hook
became "105 mm or more" or the hook lower part dimension b
became "49.5 mm or less", replace the hook.