OP000040
6-3
Troubleshooting
HYDRAULIC SYSTEM
Unstable (rough) idling.
Air in fuel lines.
Tighten fuel connections and
filter.
Fuel filter clogged.
Replace fuel filter.
Fuel pump failure.
Contact your
DOOSAN
dealer.
Incorrect fuel injection timing.
Insufficient power.
Air cleaner filter clogged.
Clean or replace element.
Fuel filer element clogged.
Replace fuel filter.
Throttle linkage adjustment
wrong.
Check and adjust linkage.
Engine oil level too high.
Check dipstick and correct
level.
Incorrect valve clearance.
Contact your
DOOSAN
dealer.
Piston ring wear.
Defective injectors.
Fuel pump failure.
Problem
Possible Cause
Remedy
Problem
Possible Cause
Remedy
None of the controls function
(loud noise from pumps).
Hydraulic pump failed.
Contact your
DOOSAN
dealer.
Low hydraulic oil level.
Add hydraulic oil as
required.
Suction line plugged or damaged.
Clean or replace as
required.
None of the controls function
(no noise from pumps).
Pilot pump failure.
Contact your
DOOSAN
dealer.
Cutoff solenoid valve failed.
Replace solenoid.
Relief cartridge of pilot parking
valve stuck.
Clean or replace as
required.
Safety limit switch is ON.
Adjust limit switch
clearance.
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 cavitating.
Bleed air from hydraulic
pumps.
Summary of Contents for DL220
Page 2: ......
Page 6: ...950106 00117E Table of Contents IV ...
Page 7: ...950106 00117E I I Presentation 1Presentation PRESENTATION FG015573 Figure 1 ...
Page 17: ...OP001012 1 5 Safety 1 3 12 6 4 11 5 9 10 8 3 7 10 9 4 6 2 FG015631 Figure 1 ...
Page 62: ...OP001012 Safety 1 50 ...
Page 112: ...OP001013 Operating Controls 2 50 CD Player Optional AST DIR FG000109 Figure 102 ...
Page 240: ...OP000040 Troubleshooting 6 8 ...