Komatsu Galeo PC850-8 User Manual

PC800, 850-8 49
40 Troubleshooting SEN00793-02
E-23 “Bucket DUMP” is not correctly displayed in monitor function
Circuit diagram related to bucket DUMP PPC hydraulic switch
Failure
phenomenon
“Bucket DUMP” is not correctly displayed in moni-
tor function
“Bucket DUMP” is not correctly displayed in the moni-
tor function (special function) on the machine monitor.
Relative
information
• Monitoring code: 01901 (Pressure switch 2)
Possible causes
and standard
value in normal
state
Cause Standard value in normalcy and references for troubleshooting
1
Bucket DUMP PPC
hydraulic switch fault
(Internal disconnection and
short-circuiting)
aTurn the engine starting switch OFF for the preparations, and keep the
engine running during the troubleshooting.
P05 (male)
R.H. work equipment
control lever
Resistance
Between (1) – (2)
NEUTRAL Min. 1 Mz
Bucket DUMP Max. 1 z
2
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) (19) –
P05 (female) (2)
Resis-
tance
Max. 1 z
Wiring harness between P05 (female) (1) – J16
– J19 – J25 – chassis ground
Resis-
tance
Max. 1 z
3
Grounding fault of wiring
harness
(Contact with grounding
(GND) circuit)
aTurn the engine starting switch OFF for the preparations, and hold it in
the OFF position during the troubleshooting.
Wiring harness between CP03 (female) (19) –
P05 (female) (2) and chassis ground
Resis-
tance
Min. 1 Mz
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.
Wiring harness between CP03 (female) (19) –
P05 (female) (2) and chassis ground
Voltage Max. 1 V
5 Defective pump controller
aTurn the engine starting switch OFF for the preparations, and start the
engine during the troubleshooting.
CP03
R.H. work equipment
control lever
Voltage
Between
(19) – chassis ground
NEUTRAL 20 – 30 V
Bucket DUMP Max. 1 V

Komatsu Galeo PC850-8 Specifications

General

Brand	Komatsu
Model	Galeo PC850-8
Category	Excavators
Language	English