Komatsu PC490-11, Installation And Instruction Manual

Page: 169 / 492

• When the starting switch is turned to ON position
while the engine shutdown secondary switch is in the
engine stopped 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).
SEAT HEATER SWITCH
This seat heater switch is used to warm the seat.
(a) OFF
Stops the seat heating.
(b) ON
Start the seat heating and the seat becomes warm.
QUICK COUPLER SWITCHES
To operate the quick coupler circuit switches (23) on RHS console (17) on LH PPC lever must be operated to-
gether.
Refer to “PRECAUTIONS FOR USING ATTACHMENT AND OPTIONS (6-2)” for an explanation of these
switches operation.
1ST ATTACHMENT PROPORTIONAL CONTROL SWITCH
The 1st attachment proportional control switch is a roller proportional control switch used to operate the 1st at-
tachment circuit (for example: crusher, clamshell open/close).
Refer to “1ST-LINE ATTACHMENT PROPORTIONAL SWITCH (6-17)” for warnings and explanation of opera-
tion.
2ND ATTACHMENT PROPORTIONAL CONTROL SWITCH
The 2nd attachment proportional control switch is a roller proportional control switch used to operate the 2nd
attachment circuit (for example: clamshell rotation).
Refer to “2ND-LINE ATTACHMENT PROPORTIONAL SWITCH (6-18)” for warnings and explanation of opera-
tion.
BREAKER SWITCH
The breaker switch operates the breaker.
Refer to “BREAKER MODE SWITCH (6-18)” for warnings and explanation of operation.
ADDITIONAL LAMPS SWITCH
(if equipped)
OPERATION EXPLANATION OF COMPONENTS
3-97