A Series Diesel Engine Troubleshooting Logic 24
Engine RPM will Not Reach Rated Speed
Cause Correction
Engine Overloaded
Verify High Idle Speed Without Load.
Investigate Operation to be Sure Correct
Gear is Being Used.
OK
Malfunctioning Tachometer
Verify Engine Speed with Hand
Tachometer - Correct as Required.
OK
Throttle Linkage Worn or
Incorrectly Adjusted
Adjust Linkage for Stop-to-Stop Fuel
Control Lever Travel.
Refer to Page 73, 225
OK
If the Problem Occurs After
Replacing the Fuel Control Lever
or Pump, Incorrectly Indexed Lever
(Robert Bosch VE Only)
Check/Correct Fuel Control Lever
Indexing.
Refer to Page 74
OK
High Speed Stop Screw Incorrectly
Adjusted
Check/Set High Speed Stop Screw.
Refer to Page 74, 225
OK
Partially Engaged Mechanical
Shutdown Lever
Check/Place Shutdown Lever in Run
Position. Refer to Page 74, 225
OK
Inadequate Fuel Supply
Check the Flow Through and Filter to
Locate the Source of the Restriction.
Refer to Page 68
OK
(Continued)
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