Komatsu PC450-8 Operation & Maintenance Manual page 140

DETAILED CONTROLS AND GAUGES
Swing Parking Brake Release Switch
NOTICE
This switch makes it possible to perform swing operations for a short even when there is a problem in the
swing parking brake electric system. DO NOT use this switch except in emergencies. Repair the problem
as soon as possible.
This switch (14) is used to make it possible to carry out opera-
tions temporarily if any problem should occur in the swing park-
ing brake system (when the display shows "E03").
(a) FREE: When abnormal (move switch up)
(b) NORMAL: When normal (move switch down)
q
If the display shows "E03", move the switch up to the FREE
position, to make it possible to carry out work.
When pushing this switch up to the FREE position, the swing
lock monitor lamp begins to flash.
Quick Coupler Switches
To operate the Quick Coupler circuit switches (16) on the RHS console and (17) on the LH PPC lever must be
operated together. Refer to "Hydraulic Quick Coupler OPERATION (6-5)" for an explanation of these switches
operation.
1st Attachment Proportional Control Switch
This switch (18) is a roller proportional control switch used to operate the 1st attachment circuit (e.g. crusher, clam-
shell open/close). Refer to "MACHINE READY FOR ATTACHMENT 6-9" for warnings and explanation of opera-
tion.
2nd Attachment Proportional Control Switch
This switch (19) is a roller proportional control switch used to operate the 2nd attachment circuit (e.g. clamshell
rotation). Refer to "See "MACHINE READY FOR ATTACHMENT" on page 8." for warnings and explanation of
operation.
Breaker switch
Switch (20) operates the breaker, refer to "MACHINE READY FOR ATTACHMENT, Attachment 2 Control (if
equipped). (6-10)" for warnings and explanation of operation.
Additional Lamps Switch
(if equipped)
Switch (21) is used to turn on the cab front lamps, cab rear
lamps and extra boom lamps (NB If fitted by customer).
(a) ON: Lamps light up.
(b) OFF: Lamps go out.
3-74
OPERATION
a
b