Maeda LC1385M-8BF - Page 164

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[1] CHECKING AROUND CRANE
• Look around and below the boom and boom mounting and look for any oil leak or similar. Be especially
careful to check the derrick cylinder and lower part of the winch motor. If you find any abnormality, repair
it.
• Check each part of the mounting portion for cracks, excessive deformation, contamination etc. In
addition, check bolts, nuts, pins and piping joints for any looseness, drop and damage etc. If you find any
abnormality, repair it.
• Check each part of the boom for cracks, excessive deformation and contamination etc. In addition, check
bolts, nuts, pins and piping joints for any looseness, drop and damage etc. 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 it.
• Check for excessive damage and deformity of the over hoist weight wire rope of the over hoisting alarm
device at the tip of the boom. If there is any abnormality, repair it.
• Check working lamp for cracks, excessive deformation and contamination etc. If you find any
abnormality, repair it.
• Check for sagged electrical wire, loosened connection and trace of burns. If you find any abnormality,
repair it.
[2] CHECKING WIRE ROPES
See "Operation 5. Handling Wire Ropes" for wire ropes.
• Check the wire ropes for damage, deformation, wear, twists, kinks, corrosion, etc. If you find any
abnormality, replace it.
• Check the bound condition of the wire rope ends. If you find any loosened wire rope end, replace it.
• Check for irregular winding of the wire ropes (winch 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 it.
• 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 it.
• Check the hook for any crack or excessive deformation.
If there is any abnormality, repair it.
• If dimension (a) between the punch marks punched on the hook
became "122.4 mm or more" or the hook lower part dimension (b)
became "70.8 mm or less", replace the hook.