Time Lag Of Work Equipment Is Large; Power Maximizing Function Does Not Operate Normally - Komatsu PC130-8 Shop Manual

40 Troubleshooting
H-11 Time lag of work equipment is large
Trouble

• Time lag of work equipment is large.

Related
• Conduct the troubleshooting in working mode P.
information
Possible causes Malfunction of control valve
and standard 1 (regeneration valve) [Boom
value in normal and arm]
state
Malfunction of control valve
2
(suction valve)
H-12 Power maximizing function does not operate normally
Trouble

• Power maximizing function does not operate normally.

Related
• Carry out all troubleshooting in power mode (P) of working mode.
information
Possible causes
Malfunction of 2-stage relief
and standard 1
solenoid valve
value in normal
state
Malfunction of main relief
2
valve
PC130-8
Cause
The regeneration valve of the control valve may have a malfunc-
tion. Check it directly.
The suction valve of the control valve (on the head side) may have
a malfunction. Check it directly.
Cause
a
Main relief valve may have malfunction. Check it directly.
Standard value in normal state/Remarks on troubleshooting
Standard value in normal state/Remarks on troubleshooting
Prepare with engine stopped, then run engine at high idle and
carry out troubleshooting.
Swing lock switch
OFF
ON
SEN04124-00
2-stage relief solenoid valve
output pressure
0 MPa
{0 kg/cm }
2
2.84 – 3.43 MPa
{29 – 35 kg/cm }
2
1
1
15