Komatsu PC138US-11 Operation & Maintenance Manual page 118

EXPLANATION OF COMPONENTS
TRAVEL SPEED SELECTOR SWITCH
• Drive the machine at low speed (set it to Lo) always when loading to or unloading from a trailer.
Never operate the travel speed selector switch during travel.
• If the travel speed is switched between Hi and Lo when the machine is traveling, the machine may
deviate to one side, even when traveling in a straight line. Stop the machine before switching the
travel speed.
• The operator cannot see the rearward of the machine. Check the rearward of the machine with rear-
view monitor always when traveling reverse.
Travel speed selector switch is used to select the travel speed
from 2 stages.
Lo lights up: Low-speed travel
Hi lights up: High-speed travel
When the engine is started, the speed is automatically set to
Lo.
Each time that the switch is pressed, the display changes
Lo→Hi→Lo in turn.
Even if the travel speed is set to high-speed (Hi), when the ma-
chine travels on soft ground or uphill and travel power is need-
ed, the system automatically shifts down to low-speed travel
(Lo) and you do not need to operate the switch. In this case,
the travel speed on the monitor display stays lit at Hi (high-
speed).
REMARK
Each time the travel speed selector switch is switched, the
mode is displayed on the monitor display, and after 2 seconds,
the screen returns to the standard screen.
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WARNING
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WENAM00111
OPERATION