Maeda MC-174CRM, Operation Manual

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2-29
PRECAUTIONS DURING WELDING REPAIR
Weld in a location with good facilities, and, only authorized personnel are permitted to weld.
Unauthorized personnel are strictly prohibited since risks such as gas generation, fire and electrical
shock are present when welding.
The personnel authorized to weld are requested to always observe the followings.
•
Disconnect the battery terminals to prevent battery explosions.
• Peel off the paint from the welding section to prevent gas generation.
• Attempting to heat up a hydraulic machinery, piping or a section near such part may cause
combustible vapor or mist to be generated and catch fire. Avoid heating such section.
• Directly heating a pressurized piping or rubber hose may cause a sudden snip. Apply a fire protection
cover.
• Disconnect the wiring connectors of the remote control devices, moment limiter display and converter.
• Put on protective equipment.
• Keep the ventilation well.
• Put away the combustibles and prepare a fire extinguisher.
• Do not ground to a location near electrical part. Such may cause the electrical part to malfunction.
DISCONNECTING THE BATTERY TERMINAL
Disconnect (-) terminal of the battery and stop the electrical flow
before repairing the electrical system or starting an electrical weld.
See “Operation 8. Battery Handling” for details.
CAUTIONS WHEN ADJUSTING RUBBER TRACK TENSION
• Grease is sealed inside the rubber track tension adjuster. The
grease is at a high pressure because of the tension of the rubber
track. Attempting to release the grease without observing the
following precautions may cause the grease valve to pop out and
result in a 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.
See “Operation 2.1.3 [1] Checking/adjusting Rubber Track
Tension” for details.
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.