Komatsu PC138US-11 Operation & Maintenance Manual page 158

EXPLANATION OF COMPONENTS
BREAKER OPERATION SWITCH
The breaker control switch is used to operate the breaker.
For handling of the breaker control switch, see "HANDLE MA-
CHINE READY FOR INSTALLATION OF ATTACHMENT
(6-16)".
SWING LOCK SWITCH
• When not using the swing operation, e.g. when traveling, put the swing lock switch to ON position.
• On slopes, even when the swing lock switch is at ON position, the weight of the work equipment
may cause the upper structure to swing if the swing control lever is operated in the downhill direc-
tion.
Swing lock switch is used to lock the upper structure so that it
cannot swing.
(a) ON position
The swing lock is always applied, and the upper structure does
not swing even when the swing is operated. In this condition,
the swing lock pilot lamp lights up.
(b) OFF position
The swing lock is canceled allowing the upper structure to
swing when operating the swing control lever.
LAMP SWITCH
Lamp switch is used to light up the working lamp and monitor
illumination.
(a) Night position
Lamps light up and monitor illumination is set to night mode.
(b) Day position
Lamps light up and monitor illumination is set to day mode.
(c) OFF position
Lamps go out.
(The monitor illumination is set to day mode.)
3-88
WARNING
k
WENAM00111
OPERATION