Komatsu D475A-5E0, Operation & Maintenance Manual

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SAFETY
PRECAUTIONS FOR OPERATION
DO NOT GO CLOSE TO HIGH-VOLTAGE CABLES
Do not travel or operate the machine near electric cables. There is
a hazard of electric shock, which may cause serious personal
injury or death. On jobsites where the machine may go close to
electric cables, always observe the following.
Before starting work near electric cables, inform the local power
company of the work to be performed, and ask them to take the
necessary action.
Voltage of Cables Safety Distance
100 V, 200 V Over 2 m (7 ft)
6,600 V Over 2 m (7 ft)
22,000 V Over 3 m (10 ft)
66,000 V Over 4 m (14 ft)
154,000 V Over 5 m (17 ft)
187,000 V Over 6 m (20 ft)
275,000 V Over 7 m (23 ft)
500,000 V Over 11 m (36 ft)
Even going close to high-voltage cables can cause electric
shock, which may cause serious burns or even death. Always
maintain a safe distance (see the table on the right) between the
machine and the electric cable. Check with the local power
company about safe operating procedure before starting
operations.
To prepare for any possible emergencies, wear rubber shoes
and gloves. Lay a rubber sheet on top of the seat, and be careful
not to touch the chassis with any exposed part of your body.
Use a signalman to give warning if the machine approaches too
close to the electric cables.
When performing operations near high voltage cables, do not let
anyone near the machine.
If the machine should come too close or touch the electric cable,
to prevent electric shock, the operator should not leave the
operator's compartment until it has been confirmed that the
electricity has been shut off.
Also, do not let anyone near the machine.
ENSURE GOOD VISIBILITY
This machine is equipped with mirrors to ensure good visibility, but even then there are places that cannot be seen
from the operator's seat, so be careful when operating.
When traveling or performing operations in places with poor visibility, it is impossible to check for obstacles in the
area around the machine and to check the condition of the jobsite. This leads to danger of serious personal injury
or death. When traveling or performing operations in places with poor visibility, always observe the following.
Position a signalman if there are areas where the visibility is not good.
Only 1 signalman should give signals.
When working in dark places, turn on the working lamp and front lamps installed to the machine, and set up
additional lighting in the work area if necessary.
Stop operations if the visibility is poor, such as in mist, snow, rain, or dust.
When checking the mirrors installed to the machine, remove all dirt and adjust the angle of the mirror to ensure
good visibility.
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