John Deere 4045 / 6068 — Remove and Install Fuel Injection Wire Harness Assembly
Repair & overhaul
For the John Deere 4045 / 6068, from the John Deere service manual.
Applies to: John Deere 4045, John Deere 6068
Before you start
- The stud connector dust cap is not reusable. Always install new one once removed from injector.
Procedure
- Remove capscrew (A) and nut (B) from bracket (C).
- Unplug fuel injection wire harness assembly connector (E) from engine wire harness (F).
- Remove 2 capscrews (G) securing 2 P-clamps (H); remove P-clamps.
- Remove 3 capscrews (I) attaching EI cover (J) to valve cover; lift EI cover clear of slots.
- Remove connector stud dust cap (M).
- Unscrew EI terminal nuts (Q), 2 per EI, from EI terminals (P).
- Lift injector stud connector body off EI; seal (R) and connector body removed as one piece.
- Remove and discard fuel injection wire harness assembly.
- Install new harness with each seal inserted into each injector stud connector body over each EI terminal.
- Apply light coat of Loctite 222 to terminal nut threads and install two EI terminal nuts per EI. Torque to specification.
- Install a new dust cap on each injector.
- Attach P-clamps and fasten to valve cover with capscrews. Tighten to specification.
- Insert tabs of heat shield into slots of valve cover and fasten with capscrews. Tighten to specification.
- Connect fuel injection wire harness assembly connector to engine fuel injection connector.
- Fasten wire harness connector to bracket with capscrew and nut. Tighten to specification.
Specs & values
- Injector Terminal Nut 2.2 ± 0.2 N·m (19.5 ± 1.8 lb-in)
- Capscrew 12.0 ± 1.0 N·m (106.0 ± 9.0 lb-in)
- Capscrew 25.0 ± 5.0 N·m (18.4 ± 3.7 lb-ft)
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.