Komatsu HB365LC-3 Operation & Maintenance Manual page 120

EXPLANATION OF COMPONENTS
AUTO-DECELERATION SWITCH
Auto-deceleration switch automatically lowers the engine
speed and turns on the function to reduce the fuel consumption
when the control levers are at NEUTRAL position.
Auto-deceleration pilot lamp is lit: Auto-deceleration ON
Auto-deceleration pilot lamp is not lit: Auto-deceleration OFF
Each time the switch is pressed, the auto-deceleration is
switched between ON and OFF.
REMARK
When the hybrid system (capacitor) needs to be charged, the
engine speed does not decrease even while the auto-decelera-
tion switch is turned on. After charging is completed, the engine
speed decreases.
Function of auto-deceleration
When the auto-deceleration function is enabled, if the work equipment lever and travel lever are returned to
NEUTRAL position, the engine speed will drop approximately after 4 seconds from the operating speed to idle
speed.
Then, the engine speed decreases further when the hybrid system (capacitor) does not need to be charged.
As a result, fuel consumption can be reduced.
If any lever is operated in this condition, engine speed will return to the previous operating speed, and you can
perform the operation.
1.
When the auto-deceleration switch is pressed and the au-
to-deceleration function is turned on, the mode is dis-
played in the center of the machine monitor display, and
after 2 seconds, the screen returns to the standard screen.
2.
On the standard screen, auto-deceleration pilot lamp lights
up.
(When the auto-deceleration is OFF, the pilot lamp goes
out.)
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OPERATION