Operation and maintenance manual

DX140R/DX140LCRSafety
1-40
Precautions for Operation
Be careful not to mistakenly travel too close to the edge of a cliff.
Use the machine only for its main p
urpose. Using it for other
purposes will cause failures.
To ensure a good view, always do the following:
• When working in dark areas, attach working lights and
fron
t lights to the machine. If necessary, set up lighting at
the work site.
• Stop operations when the visibility is poor, such
as in fog,
mist, snow,
and rain. Wait for the visibility to improve to a
level which causes no problems for the operation.
To avoid hitting the work equipment, always do the following:
• When working in tunnels, on bridge
s, under electrical
wires, or when parking the machine or carrying out other
operations in places with limited height, be careful not to hit
the bucket or other parts.
• To prevent collisions,
operate the machine at a
safe speed
when working in confined spaces, indoors, or in crowded
areas.
• Do not pass the bucket over the heads of workers or over
th
e op
erator's cabin of dump truck.
Avoid High-voltage Cables
Serious injury or death can result from contact or proximity to
high-voltage electrical lines. The bucket does not have to make
physical contact with power lines for current to be transmitted.
Use a spotter and hand signals to stay away from power lines
not clearly
visible to the operator.
Use these minimum distances as a g
uideline only. Depending
upon the voltage in the line and atmospheric conditions, strong
current shocks can occur with the boom or bucket as faraway as
4 - 6 m (13 - 20 ft.) from the power line. Very high voltage and
rainy weather could further decrease that safety margin.
NOTE: Befor
e
starting any operation near power lines (either
aboveground or buried cable type), you should
always contact the power utility company directly and
work out a safety plan with them.
Figure 26
FG000430
FG000171
Figure 27
Voltage Minimum Safe Distance
6.6 kV 3 m (9' 10")
33.0 kV 4 m (13' 1")
66.0 kV 5 m (16' 5")
154.0 kV 8 m (26' 3")
275.0 kV 10 m (32' 10")