Komatsu Galeo PC850-8 User Manual

66 PC800, 850-8
SEN00793-02 40 Troubleshooting
E-32 Travel alarm does not sound or does not stop sounding
Failure
phenomenon
• Travel alarm does not sound or does not stop
sounding.
(1) The alarm does not sound while the machine is trav-
eling.
(2) The alarm sounds while the machine is stopped.
Relative
information
Possible causes
and standard
value in normal
state
Cause Standard value in normalcy and references for troubleshooting
1 Defective travel signal
aTurn the engine starting switch OFF for the preparations, and keep the
engine running during the troubleshooting.
Monitoring code Item Normal display
01901
Pressure switch 2
Left travel
Lever operated: ON
Lever in neutral: OFF
01900
Pressure switch 1
Right travel
Lever operated: ON
Lever in neutral: OFF
If the display on the monitor panel is abnormal, carry out troubleshooting
in “*** is not displayed normally in monitoring function”.
2
Defective travel alarm
(Internal defect)
aTurn the engine starting switch OFF for the preparations, and keep the
engine running during the troubleshooting.
M14 (female) Travel lever Voltage
Between (1) – (2)
Neutral Below 1 V
Operated 20 – 30 V
If the above voltages are normal and the travel alarm does not sound,
the travel alarm is defective.
3
Disconnection of wiring
harness
(Disconnection or defec-
tive contact with connector)
aTurn the engine starting switch OFF for the preparations, and hold it in
the OFF position during the troubleshooting.
Wiring harness between CP03 (female) (8) –
M14 (female) (1)
Resis-
tance
Max. 1 z
Wiring harness between M14 (female) (2) – J25 –
chassis ground
Resis-
tance
Max. 1 z
4
Short-circuiting of wiring
harness
(Contact with 24 V circuit)
aTurn the engine starting switch OFF for the preparations, and hold it in
the ON position during the troubleshooting.
Between wiring harness between CP03
(female) (8) – M14 (female) (1) and chassis
ground
Voltage Max. 1 V
5 Defective pump controller
aTurn the engine starting switch OFF for the preparations, and keep the
engine running during the troubleshooting.
CP03 Travel lever Voltage
Between
(8) – chassis ground
Neutral Max. 1 V
Operated 20 – 30 V

Komatsu Galeo PC850-8 Specifications

General

Brand	Komatsu
Model	Galeo PC850-8
Category	Excavators
Language	English