John Deere — Install Fuel Injectors (Four-Valve Head Engines)
Repair & overhaul · Cylinder head / fuel system
From a John Deere service manual covering: 4045, 4045TF120, 6068, 6068 HF485, 6068HF158, 6068TF120, 6068TF250, 6068TFM50, 6068TFM76. Check it applies to your exact model before use.
Applies to: John Deere 4045, John Deere 4045TF120, John Deere 6068, John Deere 6068 HF485, John Deere 6068TF120, John Deere 6068TF250, John Deere 6068TFM50, John Deere 6068TFM76
Before you start
- Replace 24-volt glow plugs with same voltage rating as removed
Procedure
- Ensure used copper washer has been removed from bottom of injector sleeve.
- Install copper washer on end of fuel injector tip.
- Install injector with hold-down clamp; ensure fuel inlet port faces supply tube.
- Install fuel supply tube with smaller end toward injector; seat tube.
- Install fitting and screw using proper torque procedure.
- Install glow plug and torque to 15 N•m (133 lb-in.).
Tools required
- JDG1652 Injector Nozzle Removal Tool Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Glow plug torque 15 N•m (133 lb-in.)
Full service-parts list: John Deere 4045 →, John Deere 6068 →, John Deere 6068 HF485 →, John Deere 6068TF250 →, John Deere 6068TFM50 →, John Deere 6068TFM76 →
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.