Work Equipment, Swing, And Travel Systems Do Not Work - Komatsu PC200-8M0 Shop Manual

SEN06139-00
H-3 Work equipment, swing, and travel systems do not work
q
Failure All work equipment, swing, and travel do not work
Related infor-
q
Perform all troubleshooting with working mode in power mode (P).
mation
Malfunction of PPC lock
1
solenoid valve
Probable
causes and cri-
Malfunction of self-pressure
2
teria
reducing valve
3 Defective piston pump
4 Defective damper
12
40-500
500 Troubleshooting of hydraulic and mechanical system (H-mode)
Cause
a Be ready with engine stopped, then troubleshoot with engine
high idle.
a Be ready with engine stopped, then troubleshoot with engine
high idle.
All levers in the neutral position
Piston pump may malfunction or have internal defect. Check it by
following method.
1) Remove pump discharge pressure pickup plugs (F and R).
2) Crank engine at flywheel (manually).
3) If the oil flows out of the pump discharge pressure pickup ports,
it is normal.
Pump shaft may not revolve because of internal defect of damper.
Check damper.
H-3 Work equipment, swing, and travel systems do not work
Criteria and troubleshooting procedure
Lock lever
LOCK
FREE
Control lever
PC200, 200LC, 220, 220LC-8M0
PPC lock solenoid valve
output pressure
0 MPa
2
{0 kg/cm }
Approx. 2.9 MPa
2
{Approx. 30 kg/cm }
Control circuit source pressure
2.84 to 3.43 MPa
2
{29 to 35 kg/cm }