Komatsu Galeo PC800-8 User Manual

12 PC800, 850-8
SEN00794-02 40 Troubleshooting
H-3 All work equipment, travel, and swing systems do not work
Failure
phenomenon
• All work equipment, travel, and swing systems do not work
Relative
information
• Carry out all the troubleshooting in working mode P.
• If failure code related to pump control is also displayed, carry out troubleshooting for it first.
Possible causes
and standard
value in normal
state
Cause Standard value in normalcy and references for troubleshooting
1
Defective coupling
(Main pump drive system)
aKeep the engine stopped for the preparations and troubleshooting.
Disconnect the main pump oil pressure pickup coupler and rotate the
crankshaft. If oil flows out of the pump outlet, PTO is normal.
2
Malfunction of self
pressure reducing valve
aKeep the engine stopped for the preparations, and run it at high idle
during troubleshooting.
Control levers Control relief pressure
All levers in neutral
3.24 MPa
{33 kg/cm
2
}
Self pressure reducing valve may be malfunctioning. Check it directly (It
cannot be adjusted).
3
Leakage in control
system devices
aStop the engine and block (1) – (9) in Fig. 1 in order. (See the figure in
the next page) Run the engine at high idle and check.
Control levers Control relief pressure
All levers in neutral
3.24 MPa
{33 kg/cm
2
}
4
Malfunction of PPC lock
solenoid valve
aKeep the engine stopped for the preparations, and run it at high idle
during troubleshooting.
Lock lever Solenoid valve outlet pressure
FREE
2.9 MPa
{30 kg/cm
2
}
LOCK 0 MPa {0 kg/cm
2
}
+0.49
0
+5
0
+0.49
0
+5
0
+0.8
0.2
+8
–2

Komatsu Galeo PC800-8 Specifications

General

Brand	Komatsu
Model	Galeo PC800-8
Category	Excavators
Language	English