Travel Speed Lowers Largely During Compound Operation Of Work Equipment/Swing + Travel - Komatsu Galeo PC138US-8 Shop Manual

SEN02468-01
H-14 Travel speed lowers largely during compound operation of work
equipment/swing + travel
Trouble

• Travel speed lowers largely during compound operation of work equipment/swing + travel.

Related
• Conduct the troubleshooting in working mode P.
information
Malfunction of pump merge-
1
divider solenoid valve
Possible causes
Malfunction of pump merge-
2
and standard
divider valve
value in normal
Malfunction of work equip-
state
3 ment control valve (pressure
compensation valve)
Malfunction of swing control
4 valve (pressure compensa-
tion valve)
Malfunction of travel control
5 valve (pressure compensa-
tion valve)
16
Cause Standard value in normal state/Remarks on troubleshooting
a
The pump merge-divider valve may have a malfunction. Check it
directly.
The pressure compensation valve of the work equipment control
valve may have a malfunction. Check it directly.
The pressure compensation valve of the swing control valve may
have a malfunction. Check it directly.
The pressure compensation valve of the travel control valve may
have a malfunction. Check it directly.
Keep the engine stopped for the preparations, and keep it
running at high idle during the troubleshooting.
Control levers
All levers in NEUTRAL
Position for travel only
(On either or both sides)
40 Troubleshooting
Solenoid output pressure
0 MPa {0 kg/cm }
2
2.84 – 3.43 MPa
{29 – 35 kg/cm }
2
PC138US, USLC-8
1