John Deere 4045 / 6068 — Bleeding the Fuel System
Maintenance
For the John Deere 4045 / 6068, from the John Deere owner's manual.
Applies to: John Deere 4045, John Deere 6068
Before you start
- NEVER pressurize the fuel tank to prime the fuel system.
- Do not open high-pressure fuel system on HPCR engines.
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 flow is free from air bubbles.
- Tighten bleed plug securely; continue operating primer until pumping action is not felt.
- Start engine and check for leaks.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Fuel Injection Pump Return Line - 27 N.m (20 lb-ft)
- Fuel Injection Nozzle Delivery Line - 27 N.m (20 lb-ft)
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.