Komatsu PC1250-11 Original Instructions Manual page 158

EXPLANATION OF COMPONENTS
PUMP SECONDARY DRIVE SWITCH
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When pump secondary drive switch (1) is being used or
immediately after it is used, the temperature of resistor (2)
under the fuse may become high.
When operating the switch or replacing the fuse, take care
not to touch resistor (2).
NOTICE
• The pump secondary drive switch enables you to per-
form operation temporarily when any problem occurs
on the pump control system. Do not use it except for
emergency. Repair the problem as soon as possible.
• If this switch is moved to "Emergency" position by
mistake while the machine is operating normally,
"L03" appears in the display.
If "L03" is displayed during operation, press switch F5
to check whether the current failure code includes any
of the hydraulic
"DXA0KB". Then make sure this switch is set to "Nor-
mal" position.
The pump secondary drive switch enables you to perform oper-
ation temporarily when any problem occurs on the pump con-
trol system.
(a) Emergency
When abnormal (switch is set to upper position)
(b) Normal
When normal (switch is set to lower position)
If the Current Abnormality list includes any of the hydraulic sys-
tem errors "DXA0KA" or "DXA0KB", you can perform operation
temporarily by setting this switch to "Emergency" position (a).
SWING PARKING BRAKE CANCEL SWITCH
NOTICE
Swing operations can be performed temporarily with the swing parking brake cancel switch when there
is a problem in the swing parking brake system. Do not use it except for emergency. Repair the problem
as soon as possible.
3-92
CAUTION
system errors "DXA0KA" or
OPERATION