OP000440
6-3
Troubleshooting
HYDRAULIC SYSTEM
Problem
Cause
Remedy
None of the controls function (loud
noise from pumps)
Hydraulic pump failure.
Contact your
DOOSAN
dealer.
Low hydraulic oil level.
Add hydraulic oil as required.
Suction line clogged or damaged.
Clean or replace as required.
None of the controls function (no
noise from pumps)
Pilot pump failure.
Contact your
DOOSAN
dealer.
Cut off solenoid valve failure.
Replace solenoid.
Safety limit switch is "ON."
Adjust limit switch clearance.
"WORK/TRAVEL" selector switch
is "TRAVEL" mode.
Select "Work Mode"
All actuators have low power
Low hydraulic oil level.
Add hydraulic oil as required.
Suction filter clogged.
Clean filter.
Hydraulic pumps faulty.
Contact your
DOOSAN
dealer.
Main relief pressure too low.
Contact your
DOOSAN
dealer.
Hydraulic pumps excavating.
Bleed air from hydraulic pumps.
Only one or two actions have little
or no power
Overload relief pressure too low.
Reset pressure.
Makeup check valve leaking.
Clean or replace as required.
Control valve spool faulty.
Replace valve spool.
Dirt in valve spool.
Clean or replace as required.
Actuator failure.
Repair or replace as required.
Cylinder seal failure.
Repair or replace as required.
Cylinder rod damaged.
Repair or replace as required.
Remote control valve failure.
Replace control valve.
Wrong pilot line connection.
Reconnect pilot lines.
Oil temperature too high
Oil cooler faulty.
Contact your
DOOSAN
dealer.
Fan belt loose.
Tighten fan belting as required.
Summary of Contents for DX190W
Page 2: ......
Page 71: ...OP000528 2 3 Operating Controls ...
Page 128: ...OP000528 Operating Controls 2 60 CD Player Optional AST DIR FG000109 Figure 135 ...
Page 196: ......
Page 292: ...OP000530 Inspection Maintenance and Adjustment 4 96 ...
Page 304: ...OP000440 6 8 Troubleshooting ...