No Work Equipment, Travel And Swing Move; Abnormal Noise Is Heard From Around Hydraulic Pump - Komatsu PC130-8 Shop Manual

SEN04124-00
H-3 No work equipment, travel and swing move
Trouble

• No work equipment, travel and swing move.

Related
• Set the working mode at P mode for the troubleshooting.
information
Malfunction of PPC lock
1
solenoid valve
Possible causes
and standard
value in normal
Malfunction of self reducing
2
state
pressure valve
3 Piston pump defective
4 Damper defective
H-4 Abnormal noise is heard from around hydraulic pump
Trouble • An abnormal noise is heard from around the hydraulic pump.
Related
—
information
1 Hydraulic oil level lowered
2 Quality of hydraulic oil bad
Possible causes
Hydraulic tank cap breather
3
and standard
clogged
value in normal
state
Hydraulic tank strainer
4
clogged
5 Piston pump defective
8
Cause Standard value in normal state/Remarks on troubleshooting
a
Work equipment lock lever
a
The piston pump is suspected of malfunction or an internal failure.
Diagnose it in the following manner.
• Remove the main oil pressure measurement plug and crank the
engine. If oil flows out, it is in normal condition.
It is presumed that the pump shaft does not rotate due to some
internal failure of the dumper. Check the damper itself.
Cause Standard value in normal state/Remarks on troubleshooting
Make a visual check.
Air may have get mixed with the oil. Make a visual check.
It is presumed that the breather in the cap of hydraulic tanks is
clogged, thereby causing negative pressure inside the tank. Make
a visual check.
It is presumed that the strainer in the hydraulic tank is clogged,
thereby causing negative pressure in the suction circuit. Make a
visual check.
The piston pump is suspected of an internal failure. Check the
pump itself.
Stop engine for preparations. Start troubleshooting at engine
high idle.
Locked
Released
Stop engine for preparations. Start troubleshooting at engine
high idle.
Control lever
All control levers in
NEUTRAL position
40 Troubleshooting
Solenoid output pressure
0 MPa
{0 kg/cm }
2
2.84 – 3.43 MPa
{29 – 35 kg/cm }
2
Control circuit source pressure
3.2 ± 0.5 MPa
{33 ± 5 kg/cm }
2
PC130-8
1
1