Komatsu Galeo PC138US-8 Shop Manual page 268

SEN02553-01
Control function during travel
Traveling the machine in P or ATT mode
q
increases engine speed (N).
Traveling the machine in E, L or B mode does
q
not change engine speed (N) or pump absorp-
tion torque.
10
10 Structure, function and maintenance standard
Control function with emergency pump drive
switch "ON"
If the controller gets out of order and no work is
q
possible because the hydraulic pump does not
work properly, operating emergency pump
drive switch (1) temporarily enables to main-
tain functions of the machine with absorption
torques quite similar to those in the Mode E.
In this case, a constant current flows from the
battery to the PC-EPC valve, and the valve
detects the oil pressure only.
a. Emergency
b: Normal
a Emergency pump drive switch (1) is of the
alternative type. If the machine is operated
after the switch is set to "Emergency (a)" even
though the machine is normal, the user code
"E02" will be shown on the display.
PC138US, USLC-8