John Deere 4045 / 6068 — Adjusting Variable Speed (Droop) - Generator Set Engines Only
Adjustments · Governor
For the John Deere 4045 / 6068, from the John Deere owner's manual.
Applies to: John Deere 4045, John Deere 6068
Procedure
- Warm engine to normal operating temperature.
- When necessary, disconnect throttle linkage or cable.
- Adjust slow idle and fast idle speed when necessary.
- Run engine at fast idle, then apply load until reaching rated speed.
- Check power; adjust with the screw if needed.
- Remove load from engine.
- Check and adjust fast idle if screw has been turned.
- Repeat procedure until both engine power and fast idle speed are correct.
- Reinstall throttle linkage if previously removed.
Full service-parts list: John Deere 4045 →, John Deere 6068 →
Source: John Deere owner's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.