Komatsu PC45MR-30403, Operation And Maintenance Manual

Page: 144 / 475

PUMP SECONDARY DRIVE SWITCH
NOTICE
• Use the pump secondary drive switch only in an emergency. Repair the problem as soon as possi-
ble.
• If the pump secondary drive switch is moved to
“Emergency” position by mistake while the machine is
operating normally, “L03” is displayed on the machine
monitor.
If “L03” is displayed during operation, press function
switch “F3” on the machine monitor, and check wheth-
er the current failure code includes any of the hydraul-
ic system errors “DXA8KB” and “DXA8KA”. If There is
the hydraulic system error, repair the error as soon as
possible.
Check that the pump secondary drive switch is in “NORMAL”
position (b). If not, return the switch to “NORMAL” position (b).
When the current failure code includes either of the hydraulic
system error “DXA8KB” or “DXA8KA”, the pump secondary
drive switch enables you to operate the work equipment or the
machine temporarily by turning the switch to EMERGENCY po-
sition (a).
(a) EMERGENCY
When abnormal (switch is set to upper position)
(b) NORMAL
When normal (switch is set to lower position)
OPERATION EXPLANATION OF COMPONENTS
3-83