Komatsu D51EX-24, Operation & Maintenance Manual

Page: 141 / 382

ENGINE SHUTDOWN SECONDARY SWITCH
NOTICE
The engine shutdown secondary switch is used to stop the engine when the starting switch is turned to
OFF position but the engine does not stop.
• Use the engine shutdown secondary switch only in an emergency.
Immediately ask your Komatsu distributor for repair of the problem.
• If this switch is set to the “STOP ENGINE” position by mistake while the machine is operating nor-
mally, “Engine Shutdown Secondary SW In Operation” is displayed on the machine monitor.
If “Engine Shutdown Secondary SW In Operation” is displayed on the machine monitor, check that
the switch cover is closed and the switch is in the “NORMAL” position. If not, set it to the “NOR-
MAL” position.
1.
Raise cover (C) and open it.
2.
Turn the engine shutdown secondary switch to upper posi-
tion (a) and the engine stops.
(a) STOP ENGINE
When abnormal (switch is set to upper position)
(b) NORMAL
When normal (switch is set to lower position)
• When cover (C) is closed, the engine shutdown secondary switch automatically returns to the NOR-
MAL position (b).
• When the starting switch is turned to ON position
while the engine shutdown secondary switch is in the
STOP ENGINE position (a), “Engine Shutdown Sec-
ondary SW In Operation” is displayed on the machine
monitor.
If this screen is displayed, return the engine shutdown
secondary switch to the NORMAL position (b).
OPERATION EXPLANATION OF COMPONENTS
3-85