Komatsu ecot3 PC300LC-8 Shop Manual page 275

10 Structure, function and maintenance standard
2) Function to control pump during travel
q Traveling the machine in E or B mode
leaves the working mode unchanged, but
raises the pump absorption torque and
engine speed (N) to values same as those
in P mode.
q If the machine travels in L mode, the work-
ing mode and engine speed (N) do not
change, but the pump absorption torque is
increased.
PC300, 350-8
3) Function to control when emergency pump
drive switch is turned on
q Even if any abnormality occurs in the controller
or sensor, setting emergency pump drive
switch (1) to the "ON" position activates the
machine with an absorption torque approxi-
mately equivalent to that in E mode.
In this case, a constant current flows from the
battery to the EPC valve for PC and therefore,
the oil pressure is sensed by only the EPC
valve for PC.
SEN01998-05
17