John Deere — Remove Denso Fuel Injection Pump
Repair & overhaul · Denso in-line injection pump
From a John Deere service manual covering: 4045, 4045TF120, 6068, 6068TF120, 6068TF250, T06068TF220, T06068TF250, T06068TFM50. Check it applies to your exact model before use.
Applies to: John Deere 4045, John Deere 4045TF120, John Deere 6068, John Deere 6068TF120, John Deere 6068TF250, John Deere POWERTECH 4.5 L & 6.8 L Diesel Engines (4045 / 6068) engine
Before you start
- Once JDG886 Timing Pin is installed, DO NOT turn engine or pump may be damaged.
- Never steam clean or pour cold water on an injection pump while pump is running or warm.
Procedure
- Clean injection lines and area around the injection pump with cleaning solvent or a steam cleaner.
- Rotate engine flywheel (normal running direction) until No. 1 piston is at TDC of compression stroke.
- Remove injection pump drive gear cover and O-ring.
- Install JDG886 Injection Pump Timing Pin through drive gear into pump hub until it bottoms.
- Disconnect injection pump lube line.
- Disconnect fuel shut-off solenoid electrical connector.
- Remove fuel inlet line and fuel leak-off line.
- Disconnect fuel supply pump lines.
- Disconnect aneroid line.
- Remove fuel injection line nuts.
- Remove four injection pump drive gear cap screws.
- Remove four mounting stud nuts securing injection pump to cylinder block.
- Carefully remove injection pump from mounting studs and place on a clean flat surface.
Tools required
- JDG820, JDE81-1 or JDE83 Flywheel Turning Tool Amazon
- JDE81-4 or JDG1571 Timing Pin Amazon
- JDG886 Injection Pump Timing Pin Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Full service-parts list: John Deere 4045 →, John Deere 6068 →, John Deere 6068TF250 →
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.