John Deere 4045 / 6068 — Bleed the Fuel System (OEM Engines)
Maintenance
For the John Deere 4045 / 6068, from the John Deere service manual.
Applies to: John Deere 4045, John Deere 6068
Before you start
- Do not crack any fuel lines to bleed the fuel system; the system is sensitive to fuel contamination.
- Escaping fluid under pressure can penetrate the skin causing serious injury.
Procedure
- Loosen the air bleed vent screw two full turns by hand on the final fuel filter base.
- Operate the fuel transfer pump primer lever, or primer button, until fuel flows out of bleed vent screw.
- Tighten bleed vent screw securely; continue operating primer until pumping action is not felt.
- Start engine and check for leaks.
- If engine will not start, repeat steps 1-4.
Full service-parts list: John Deere 4045 →, John Deere 6068 →
Source: John Deere service 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.