Doosan D35C-5 FDA04 Operation & Maintenance Manual page 113

Problem
Rough Idle (Gas)
High Idle Speed
(Gas)
Probable Cause
Incorrect Idle speed control
Incorrect timing or spark control
Engine Mechanical
Incorrect Idle speed control
Throttle sticking
Foot pedal sticking or incorrect
pedal signal
See Advanced Diagnostics & Engine
Service Manual
See Engine Service Manual
See Advanced Diagnostics & Engine
Service Manual
Check pedal return spring travel for binding
See Advanced Diagnostics
-111-
Operation Section
Corrective Action