Auto-Decelerator Does Not Operate - Komatsu Galeo PC800-8 Shop Manual

40 Troubleshooting
E-4 Auto-decelerator does not operate
Failure
• The auto-decelerator does not operate.
phenomenon
• Since the auto-decelerator is set to 1,400 rpm, it does not operate if the fuel control dial is not set above
this level.
Relative
• Check the display on the monitor panel while the engine is running.
information
• If the display on the monitor panel is abnormal, carry out troubleshooting in "*** is not displayed normally
in monitoring function".
1 Defective boom RAISE signal
Defective boom LOWER
2
signal
3 Defective arm IN signal
4 Defective arm OUT signal
Defective bucket CURL
5
signal
Possible causes
Defective bucket DUMP
and standard
6
signal
value in normal
state
7 Defective swing signal
8 Defective left travel signal
9 Defective right travel signal
10 Defective service signal
11 Defective pump controller
12 Defective engine controller
PC800, 850-8
Cause Standard value in normalcy and references for troubleshooting
Monitoring code
Pressure switch 1
Monitoring code
Pressure switch 1
Monitoring code
Pressure switch 1
Monitoring code
Pressure switch 1
Monitoring code
Pressure switch 2
Monitoring code
Pressure switch 2
Monitoring code
Pressure switch 1
Monitoring code
Pressure switch 2
Monitoring code
Pressure switch 1
Monitoring code
Pressure switch 2
If causes 1 – 10 are not detected, the pump controller may be defective.
(Since trouble is in the pump controller, troubleshooting cannot be carried out.)
If causes 1 – 10 are not detected, the engine controller may be defec-
tive.
(Since trouble is in the pump controller, troubleshooting cannot be carried out.)
Item
01900
Boom RAISE
Item
01900
Boom LOWER
Item
01900
Arm IN
Item
01900
Arm OUT
Item
01901
Bucket CURL
Item
01901
Bucket DUMP
Item
01900
Swing
Item
01901
Left travel
Item
01900
Right travel
Item
01901
Service
SEN00793-02
Normal display
Lever operated: ON
Lever in neutral: OFF
Normal display
Lever operated: ON
Lever in neutral: OFF
Normal display
Lever operated: ON
Lever in neutral: OFF
Normal display
Lever operated: ON
Lever in neutral: OFF
Normal display
Lever operated: ON
Lever in neutral: OFF
Normal display
Lever operated: ON
Lever in neutral: OFF
Normal display
Lever operated: ON
Lever in neutral: OFF
Normal display
Lever operated: ON
Lever in neutral: OFF
Normal display
Lever operated: ON
Lever in neutral: OFF
Normal display
Lever operated: ON
Lever in neutral: OFF
17