John Deere 4045 / 6068 — Combine and 6020 Tractor Fuel System Bleed
Maintenance
For the John Deere 4045 / 6068, from the John Deere service manual.
Applies to: John Deere 4045, John Deere 6068
Procedure
- Combines: Ignition ON; allow 40 seconds for electronic transfer pump to prime.
- Combines: If further bleeding required, key OFF, wait 20 seconds, key ON and prime 40 seconds.
- 6020 Tractors: Open bleed vent screw two full turns by hand.
- 6020 Tractors: Ignition ON until fuel is free of air bubbles; then ignition OFF.
- 6020 Tractors: Tighten bleed vent screw two full turns.
Specs & values
- Electronic transfer pump primes for 40 seconds at key ON
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.