M A E D A Mini-Crawler Crane Section 5 – INSPECTION
9/2020 MC285CB-3 5-15
Battery
Check for any accumulation or deposits of
inflammable items including leaves, wastepaper,
dust, oil, or grease around the battery. Remove
any accumulations or deposits.
Check the electric motor and electric wiring for
slackness and connections for looseness, and
also check if there are any traces of burning.
Repair if any abnormality is found.
Hydraulic System of Undercarriage
(Travel motor, control valve, hydraulic
oil tank, and hose joint)
Check for loose pipe connections or oil leakage
and repair any abnormality.
Undercarriage (rubber track, track roller,
sprocket and idler)
Check for damage, wear and loose track rollers.
Repair any abnormality. Check for loose or
missing bolts and retighten as necessary. For
more information, see “Inspection of Rubber
Tracks” on page 5-37.
Outriggers
Check for cracks and bent or damaged parts.
Check wear of support pins etc., and repair as
necessary.
Outrigger Cylinder
Check for loose pipe connections, oil leakage,
wear or damage of support pins etc., and repair as
necessary.
Post
Check for cracks, and bent or damaged parts.
Also check for loose post and slew ring mounting
bolts, loose swing system speed reducer
mounting bolts, loose pipe connections or oil
leakage. Repair any abnormality detected.
Derrick Cylinder
Check for loose pipe connections, oil leakage,
wear or damage of support pins etc., and repair as
necessary.
Boom
Check for cracks, bent or damage sections in all
areas, and check wear of support pins etc., and
repair as necessary.
Check for loose mounting bolts of the support pin
lock plate portion and tighten it as necessary.
Telescope Cylinder
Check for loose pipe connections or oil leakage
and repair as necessary.
Wire Rope
Check for damage, deformation, wear, twists,
kinks and corrosion and replace where necessary.
For more information, see “Wire Rope” on page
5-41.
Over Winding Detector
Check the wire rope of over- winding weight for
damage etc. and replace it as necessary.
Winch Motor
Check for loose pipe connections, oil leakage or
loose mounting bolts, and repair as necessary.
Winch Drum
Check the drum for cracks, bending or damage
and repair it as necessary. Check hoisting wire
rope for disorderly winding and repair it as
necessary
Hook Block
Check hook and sheaves for cracks, bending or
damage and repair where necessary. Check hook
and sheaves for proper rotation and repair as
necessary.
Operation Levers
Operate each of the operation levers to confirm
that they move smoothly, that they return to their
neutral positions, and that there are no
discrepancies in operational feel. Perform
appropriate repairs to address any abnormalities.
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