Doosan D20S-5 Operation & Maintenance Manual page 99

Problem Problem
Rough Idle (Gas) Rough Idle (Gas)
High Idle Speed High Idle Speed
(Gas) (Gas)
Probable Cause Probable Cause
Incorrect Idle speed control Incorrect Idle speed control
Incorrect timing or spark control Incorrect timing or spark control
Engine Mechanical Engine Mechanical
Incorrect Idle speed control Incorrect Idle speed control
Throttle sticking Throttle sticking
Foot pedal sticking or incorrect Foot pedal sticking or incorrect
pedal signal pedal signal
-96- -96-
Corrective Action Corrective
See See Advanced Advanced
Service Manual Service Manual
See Engine See Engine Service Service Manual
See See Advanced Advanced
Service Manual Service Manual
Check pedal return spring travel for binding Check pedal return spring
See Advanced Diagnostics See Advanced Diagnostics
Operation Section Operation Section
Action
Diagnostics Diagnostics & & Engine Engine
Manual
Diagnostics Diagnostics & & Engine Engine
travel for binding