Komatsu PC450-8 Operation & Maintenance Manual page 421

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HIGH REACH DEMOLITION EQUIPMENT 27M
CRUSHER CONTROL FOR OPENING AND CLOSING
If any lever is operated when in the deceleration range, the
engine speed will suddenly increase, so be careful when
operating the levers.
q When the proportional control switch (11) is operated forward,
the attachment is actuated in forward direction. When the rear
of the switch is operated, the attachment is actuated in
reverse direction.
WARNING
CONTROL LEVERS AND SWITCHES
11
b
RH Lever
7
OPEN
CLOSE
OPEN
CLOSE
7-11

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