Driving Near High Voltage Cables; When Dumping; When Loading; Working On Loose Ground - Komatsu 930E-4SE Operation & Maintenance Manual

Safety - Section 20
Page 20-8

Driving Near High Voltage Cables

Driving near high-voltage cables can cause electric
shock. Always maintain safe distances between the
truck and the electric cable as listed below.
Voltage Minimum Safety Distance
6.6 kV 3 m
33.0 kV 4 m
66.0 kV 5 m
154.0 kV 8 m
275.0 kV 10 m
The following actions are effective in preventing
accidents while working near high voltages:
• Wear shoes with rubber or leather soles.
• Use a signalman to give warning if the truck
approaches an electric cable.
• If the work equipment touches an electric cable,
the operator should not leave the cab.
• When performing operations near high voltage
cables, do not allow anyone to approach the
truck.
• Check with the
department about the voltage of the cables
before starting operations.

Working On Loose Ground

• Avoid operating the truck near cliffs, overhangs
and deep ditches. If these areas collapse, the
truck could fall or tip over and result in serious
injury or death. Remember that ground surfaces
in these areas may be weakened after heavy rain
or blasting.
• Freshly laid soil and the soil near ditches is loose.
It can collapse under the weight or vibration of
the truck. Avoid these areas whenever possible.

When Dumping

• Before starting the dumping operation, make
sure that there are no persons or objects behind
the truck.
• Stop the truck in the desired location. Check
again for persons or objects behind the truck.
Give the determined signal, then slowly operate
the dump body. If necessary, use blocks for the
wheels or position a flagman.
• When dumping on slopes, truck stability is poor
and there is danger of tipping over. Always use
extreme care when performing such operations.
• Never travel with the dump body raised.
10 ft.
14 ft.
17 ft.
27 ft.
33 ft.
electrical maintenance

When Loading

• Make sure that the surrounding area is safe. Stop
the truck in the correct loading position, then load
the body uniformly.
• Do not leave the operator's seat during the
loading operation.

Parking The Truck

• Choose a flat, level surface to park the truck. If
the truck has to be parked on a slope, put blocks
behind all the wheels to prevent truck movement.
• When parking on public roads, provide fences
and signs, such as flags or lights, on the truck to
warn pedestrians and other vehicles. Make sure
that the truck, flags or lights do not obstruct
traffic.
• Before leaving the truck, lower the dump body
fully, move the directional control lever to PARK,
stop the engine and lock everything. Always take
the key with you.
Do not activate the wheel brake lock when the
parking brake is activated. Bleed down of
hydraulic pressure may occur, causing the truck
to roll away.

Towing

• Improper towing methods may lead to serious
personal injury and/or damage.
• Use a towing device with ample strength for the
weight of this truck.
• Never tow a truck on a slope.
• Inspect towing components, such as tow bars
and couplings, for any signs of damage. Never
use damaged or worn components to tow a
disabled vehicle.
• Keep a safe distance from the trucks and towing
apparatus while towing a vehicle.
• When connecting a truck that is to be towed, do
not allow anyone to go between the tow vehicle
and the disabled vehicle.
• Set the coupling of the truck being towed in a
straight line with the towing portion of the tow
truck, and secure it in position.
• For towing methods,
Instructions - Section 30, Towing.
7/11 OM2042
refer to Operating