5 - 7
Section C
Electrics
9803/6400
Section C
5 -7
Issue 2*
Pump Control
Pressure Increasing System
(One-touch digging force UP, Travel power UP)
A In only H or S modes, when the one-touch digging force UP switch is turned ON (IN5), the signal enters the controller
through the timer in the panel switch and remains for 8 sec, 24V is output from the controller to the now activated solenoid
valve. Pilot pressure enters the main relief valve, and pressure setting increases. IN6 switches for 8 seconds after one-touch
digging force UP switch is turned ON. 'One-touch digging force UP is displayed on the monitor at the same time. If the one-
touch digging force UP switch is pressed for a long period the pressure setting increases only for 8 seconds.
B Always in the F mode or when the travel pressure switch is turned on, 24V is output to the solenoid valve and pressure
setting increases. It increases while travel pressure switch is ON (no timer setting). It is not displayed on the monitor. In
turning ON the one-touch digging force UP switch in this condition, digging force UP appears on the monitor for 8 seconds.
Though it is in the travel plus an attachment condition (one-touch digging force UP switch OFF) the pressure setting
increases, and the pressure setting of the attachment also increases its pressure.
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