Travel - Doosan DX700LC Operation And Maintenance Manual

TRAVEL

1. Before operating the travel levers, make sure that you
know in which direction the machine is pointing. Look
at the end of the track assemblies. If the drive motors
are visible while sitting in the operator's seat, you are
looking at the back end of the track assembly
(therefore, you are looking backwards). In this case,
the response of the travel levers will be the reverse of
normal operation.
2. Before moving, make sure that there are no personnel
in the way or on the machine. Sound the horn to alert
workers that you are about to move the machine.
3. Be sure the path is clear during travel.
4. Use extreme caution when reversing travel. Be sure
there is a clear path behind the machine.
5. Make sure to operate the travel control levers
smoothly to avoid sudden starts or stops.
6. Before leaving the operator's seat, make sure to lock
out all control systems and shut down the engine to
avoid accidental activation.
Automatic Travel Speed Control
Do not change the travel mode while traveling. Always use
speed mode "O" when traveling down a slope. It is very
dangerous to change to speed modes indicated "I" or "II"
while going down a slope. Only change travel mode after
coming to a complete stop.
Two travel speed ranges can be selected by using the travel
speed selector switch on the control panel (Figure 26).
"O" (LOW) - In this position low travel speed and a higher torque
are selected.
"I" (HIGH) - In this position high travel speed and a lower torque
are selected.
"II" (AUTOMATIC) - Setting the control at the "II" position
enables the machine to change to a different speed range
automatically. This change happens automatically depending on
the hydraulic oil pressure in the travel circuit. When hydraulic oil
pressure rises, the travel speed is automatically set to low. An
example is if the machine is traveling on a flat, solid surface, the
higher speed range would be used. When a slope is
encountered, the speed drops and the travel circuit hydraulic
pressure rises, causing the control circuit to shift to the higher
torque, lower speed range.
Operation
3-14
WARNING
WARNING
O
I
II
Figure 26
FG000023
OP001122