All Work Equipment, Travel, And Swing Systems Do Not Work - Komatsu Galeo PC800-8 Shop Manual

SEN00794-02
H-3 All work equipment, travel, and swing systems do not work
Failure

• All work equipment, travel, and swing systems do not work

phenomenon
Relative • Carry out all the troubleshooting in working mode P.
information • If failure code related to pump control is also displayed, carry out troubleshooting for it first.
Defective coupling
1
(Main pump drive system)
Malfunction of self
2
pressure reducing valve
Possible causes
and standard
value in normal
state
Leakage in control
3
system devices
Malfunction of PPC lock
4
solenoid valve
12
Cause Standard value in normalcy and references for troubleshooting
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.
aKeep the engine stopped for the preparations, and run it at high idle
during troubleshooting.
Self pressure reducing valve may be malfunctioning. Check it directly (It
cannot be adjusted).
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.
aKeep the engine stopped for the preparations, and run it at high idle
during troubleshooting.
Control levers
All levers in neutral
Control levers
All levers in neutral
Lock lever
FREE
LOCK
40 Troubleshooting
Control relief pressure
+0.49
3.24 MPa
0
+5
{33 kg/cm 2 }
0
Control relief pressure
+0.49
3.24 MPa
0
+5
{33 kg/cm 2 }
0
Solenoid valve outlet pressure
+0.8
2.9 MPa
0.2
+8
{30 kg/cm 2 }
–2
0 MPa {0 kg/cm 2 }
PC800, 850-8