Section 5 –
GENERAL MAINTENANCE INFORMATION AND PRECAUTIONS
Mini-Crawler Crane M A E D A
5-6 1/2019 MC405C-3
Disconnect Battery Terminal
Fig. 5-14
Disconnect (-) terminal of the battery and stop
the electrical flow before repairing the electrical
system or starting an electrical weld.
For details, see "Battery Precautions" on page 5-
56.
Cautions When Adjusting Rubber Track
Tension
Fig. 5-15
• Grease is sealed inside the rubber track
tension adjuster. The grease is at a high
pressure because of the tension of the rubber
track. Attempt to release the grease without
observing the following precautions may cause
the grease valve to pop out and result in
serious accident.
• Do not loosen the tension adjustment grease
valve one full turn or above. Doing so may
cause the grease valve may pop out.
• To avoid the risk during tension adjustment, do
not place your body in right front of the grease
valve.
For more information, see "Check / Adjust
Rubber Track Tension" on page 5-31.
High Pressure Hose Handling Cautions
Oil leaking from high pressure hose may cause
fire or bodily accident due to faulty operation.
Whenever a damaged hose or loosened bolt is
found, abort working and ask us or our sales
service agency for a repair.
• Replacement of high pressure hose requires
experienced skill. In addition, the tightening
torques are decided by the horse types and
size.
Customers are prohibited to repair.
• Replace the applicable part if any of the
following conditions is found.
• Hose sleeve damage or leak.
• Scratch or truncation of the coat, or exposure of
reinforcing layer of a wire
• Coat is partially swollen.
• Indication of twist or collapse is at a movable
part of hose.
• Alien object buried in coating.
• Hose sleeve deformation.
High Pressure Oil Cautions
Fig. 5-16
Fig. 5-17
Failure to make sure the pneumatic circuit
pressure is relieved before inspection or
replacement of a high pressure piping or hose
may result in bodily accidents.
Always observe the followings.
• Do not start any inspection or replacement
before the pressure dissipates.
• Put on protective glasses and leather gloves.
• When a piping or hose leak exists, the
piping/horse itself or vicinity or the ground is
wet. If such is seen, a piping crack, hose crack
or inflation is considerable, so always ask us or
our sales service agency for a repair.
• High pressure oil leaking through a small hole
may puncture the skin or destroy eyesight upon
contacting with skin or eye.
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