Komatsu WA20-2, Operation & Maintenance Manual

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DO NOT GO CLOSE TO HIGH-VOLTAGE CABLES
‡ Going close to high-voltage cables can cause electric shock. Always maintain the safe distance
given below between the machine and the electric cable.
‡ The following actions are effective in preventing accidents.
1) Wear shoes with rubber or leather soles.
2) Use a signalman to give warning if the machine approaches too close to the electric cable.
‡ If the work equipment should touch the electric cable, the operator should not leave the operator’s
compartment.
‡ When carrying out operations near high voltage cables, do not let anyone come close to the
machine.
‡ Check with the electricity company about the voltage of the cables before starting operations.
Min. safety
Voltage
distance
6.6 kV 3 m 10ft
33.0 kV 4 m 14ft
66.0 kV 5 m 17ft
154.0 kV 8 m 27ft
275.0 kV 10 m 33ft
A0060820
7. PRECAUTIONS DURING OPERATION
 WARNING: Failure to follow these safety precautions may lead
to a serious accident.
PRECAUTIONS WHEN OPERATING
‡ Be careful not to approach too close to the edge of cliffs.
When making embankments or landfills, or when dropping soil over a cliff, dump one pile, then
use the next pile of soil to push the first pile.
‡ Be careful not to let the bucket hit the dump truck or the side of the excavated ditch.
‡ The load suddenly becomes lighter when the soil is pushed over a cliff or when the machine
reaches the top of a slope. When this happens, there is danger that the travel speed will suddenly
increase, so be sure to reduce the speed.
‡ Always carry out loading operations up-wind to protect yourself from dust.
‡ When the bucket is fully loaded, be particularly sure to avoid sudden starting, turning, or stopping.
‡ When loading a dump truck, check that there is no one in the area. Be careful also that the load
does not drop when it is being loaded.
ENSURE GOOD VISIBILITY
‡ When working in dark places, install working lamps and head lamps, and set up lighting in the
work area if necessary.
‡ Stop operations if the visibility is poor, such as in mist, snow, or rain, and wait for the weather
to improve to a condition that allows the operation to be carried out safely.