Komatsu PC130-7, Shop Manual

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PC130-7
20-515
TROUBLESHOOTING
H-12 Time lag of work equipment is large
H-13 One-touch power maximizing function does not work
Trouble • Time lag of work equipment is large.
Related
information
• Carry out the troubleshooting in working mode A.
Possible causes
and standard
value in normal
state
Cause Standard value in normal state/Remarks on troubleshooting
1
Malfunction of control valve
(regeneration valve) [Only
boom]
The regeneration valve of the control valve may have a malfunction.
Check it directly.
2
Malfunction of control valve
(Suction valve) The suction valve of the control valve may have a malfunction. Check it
directly.
Trouble • One-touch power maximizing function does not work.
Related
information
• Carry out installation in the reverse order to removal.
Possible causes
and standard
value in normal
state
Cause Standard value in normal state/Remarks on troubleshooting
1
Malfunction of 2-stage
relief solenoid valve
a
Prepare with engine stopped, then run engine at high idling and carry
out troubleshooting.
Swing lock switch Solenoid valve output pressure
OFF
0 MPa
{0 kg/cm
2
}
LOCK
2.84 – 3.43 MPa
{29 – 35 kg/cm
2
}
2
Malfunction of main relief
valve The main relief valve of the control valve may have a malfunction.
Check it directly.
H-12, H-13
(1)