Komatsu PC290LC-6K Operation & Maintenance Manual page 164

PRECAUTIONS WHEN HANDLING
OPERATION: explanation of Devices
1. Dual Purpose Control Pedal.
The additional pedal to the right of the travel levers controls two functions on a PC290LC/NLC-6K-Piece Boom
machine:
In normal operation the pedal controls the operation of the second boom adjust cylinder. Pressing down on the
front of the pedal pushes the second boom away from the cab, pressing down on the rear of the pedal pulls the
second boom towards the cab.
The foot pedal is also used to operate the HCU circuit. To select HCU operation, operate the additional switch on
the RH. stand console. Once HCU operation has been selected, it is controlled by the foot pedal in the same way
as the mono-boom machine. The second boom adjust cylinder will not operate if HCU circuit operation is selected
at this switch.
Press rear of
pedal
3-18
Dual purpose control pedal
Extend 2 nd
boom raise
cylinder
Retract 2 nd boom
raise cylinder
Press front of pedal
Five blank additional
switches
"HCU Operation"
select switch
Colour: Blue