John Deere 4045 / 6068 — Remove and Install Flow Dampers
Repair & overhaul · Flow dampers on high pressure common rail
For the John Deere 4045 / 6068, from the John Deere service manual.
Applies to: John Deere 4045, John Deere 6068
Before you start
- Wait a minimum of 15 minutes after engine is stopped before disconnecting any high pressure fuel lines.
- Perform the following steps in a clean environment.
Procedure
- Thoroughly clean all fuel lines, fittings, components, and chamfered area around the faulty flow damper.
- Using a backup wrench on flow damper, loosen fuel line fitting (A).
- Loosen fuel line fitting on injector inlet connector. The line does not need to be removed.
- Remove flow damper (B) keeping internal components (C) together.
- Remove orifice plate (E) from inside flow damper bore using a clean magnet (D).
- Replace complete flow damper as an assembly.
- Insert new orifice plate (A) inside bore on high pressure common rail.
- Holding spring (C) and piston (B) inside flow damper body (D), install new flow damper. Tighten to specification.
- Connect high pressure injection line to flow damper and injector inlet connector. Tighten to specification.
- Bleed fuel system.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Flow damper 176 N·m (130 lb-ft)
- High pressure injection line at both ends 30 N·m (22 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.