John Deere 9.0 L Diesel Engines — Clean Electronic Injectors (In Engine)

Maintenance

For the John Deere 9.0 L Diesel Engines, from the John Deere service manual.

Applies to: John Deere 6090 (9.0 L) engine

Procedure

1. Change engine primary and secondary fuel filters.
2. Prime fuel system and start engine; run until normal operating temperature.
3. Disconnect fuel supply to primary filter; connect red supply hose to SW10015JD kit reservoir.
4. Disconnect fuel return-to-tank; connect black return hose through kit filter to reservoir.
5. Fill reservoir with TY26688 Diesel Fuel System Clean-Up solution; open valve.
6. Key-on engine to check for leaks and verify return fuel flow.
7. Start engine and run at 1100 rpm for 20-40 minutes; do not let engine run out of fuel.
8. Remove and inspect kit return filter element (SW10967P1) for debris; repeat if badly contaminated.
9. Close reservoir valve; disconnect hoses; reconnect fuel supply and return lines.
10. Start engine and run 10-15 minutes to purge cleaner solution.

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.

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