John Deere 4045 / 6068 — Bleeding Fuel System
Maintenance
For the John Deere 4045 / 6068, from the John Deere operator's manual.
Applies to: John Deere 4045, John Deere 6068
Before you start
- Do not pressurize the fuel tank to prime the fuel system.
- Four-valve cylinder head engines are especially sensitive to fuel contamination; do not crack any fuel lines to bleed the fuel system.
Procedure
- Loosen the air bleed vent screw on fuel filter base two full turns by hand.
- Operate fuel supply 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 operator'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.