Work Equipment Does Not Move Singly - Komatsu PC130-7 Shop Manual

TROUBLESHOOTING
H-10 Work equipment does not move singly
(1) Boom does not move singly.
Trouble (2) Arm does not move singly.
(3) Bucket does not move singly.
Related
• Carry out the troubleshooting in working mode A.
information
Possible causes
and standard 1 Malfunction of PPC valve
value in normal
state
Malfunction of control valve
2
(spool)
PC130-7
Cause Standard value in normal state/Remarks on troubleshooting
aPrepare with engine stopped, then run engine at high idling and carry
out troubleshooting.
Work equipment control lever
The spool of the control valve may have a malfunction. Check it directly.
Neutral
Operated
H-10
PPC valve output pressure
0 MPa
2
{0 kg/cm }
2.84 – 3.43 MPa
2
{29 – 35 kg/cm }
20-513
(1)