Operation and maintenance manual

DX140R/DX140LCROperation
3-14
Automatic Travel Speed Control
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 se
lected.
"I" (HIGH) - In this position high travel speed and a lower torque
are se
lected.
"II" (AUTOMATIC) - Setting the contr
ol 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,
th
e 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.
WARNING
AVOID DEATH OR SERIOUS INJURY
Do not change the travel mode while traveling. Always use
spee
d 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.
FG000023
O
I
II
Figure 26