Mini-Crawler Crane M A E D A Section 5 – BASIC MAINTENANCE
1/2019 MC405C-3 5-11
Electrical Part Handling
• The electrical parts are susceptible to water
damage and damaged coating. A current
leakage is developed if the electrical parts are
wetted or have damaged coating, which causes
the machine to go out of order and malfunction.
Exercise due caution to handle the electrical
parts.
• Inspection and maintenance include the
checking of belt tension, belt damage, and
battery charge level.
• Never remove and disassemble equipment
(electrical parts) from the machine.
• Only optional electrical parts that accompany
the machine can be installed.
• Keep the electrical parts away from water when
the machine is washed and used in the rain.
• When using the machine at the seashore, keep
the electrical parts free of water and impurities
to prevent corrosion.
Hydraulic Equipment Handling
• Hydraulic equipment will be at elevated
temperatures during and immediately after
operation. Hydraulic equipment operates under
high pressure. The following precautions
should be observed when performing
inspection and maintenance of hydraulic
equipment.
• Place the machine in travel position on a level
surface to inhibit the application of pressure to
the cylinder circuit.
• Be sure to stop the engine.
• Hydraulic oil and lubricating oil will be at
elevated temperatures and high pressure
immediately after equipment comes to a stop.
Perform inspection and maintenance only after
the oil drop in temperature for safety. An
internal pressure may be exerted despite
temperature drop. When removing the plugs,
screws and hose joints, stand aside and
provide gradual loosening to decompress.
• Be sure to remove the pressure releasing air
from the hydraulic oil tank before performing
inspection and maintenance of the hydraulic
circuit.
• Inspection and maintenance include hydraulic
oil level check and replacement of the filters
and hydraulic oil.
• Check the O-ring for scratches when removing
the high-pressure hose. If check finds
scratches, replace the O-ring.
• Air bleed of the hydraulic circuit is required after
the following tasks are performed: replacement
and cleaning of the hydraulic oil filter element
and strainer, repair and replacement of
hydraulic equipment, and hydraulic piping
replacement.
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