Komatsu D31EX-21, Operation & Maintenance Manual, Page: 141 / 256

OPERATION
OPERATION
3-89
SHIFTING GEARS 3
The machine does not have to be stopped to shift gears.
Press the shift switch on the knob of steering, directional, and
gearshift lever (1) and select the desired speed range.
q Gear shifting
Press the shift switch of the knob of the steering, directional,
and gearshift lever to carry out the gearshifting operation.
Press the UP switch to shift up.
Press the DOWN switch to shift down.
When the starting switch is turned to the ON position, the
speed range is set by default to 1st.
For details of the method of selecting the shift mode, monitor
display, and set travel speed, see “DISPLAY PANEL A (SPEED
RANGE, SET TRAVEL SPEED, SHIFT MODE INDICATOR)
(3-15)“.
If the operating load increases, the travel speed will slowly decrease and the transmission will shift down. When
the load becomes lighter again, the transmission will shift up to the set travel speed.
When the transmission automatically shifts down, the speed range display does not change.
UP
DOWN