John Deere — Replacing Fuel Filter and Dosing Elements (6068)
Maintenance · Fuel filters, dosing element and doser header
From a John Deere service manual — check it applies to your exact model before use.
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Before you start
- Place machine in Key OFF and disconnect electric fuel transfer (lift) pump or battery before servicing.
Procedure
- Close fuel shut-off valve, if equipped; clean assemblies and surrounding areas.
- Disconnect water in fuel sensor wiring from primary fuel filter.
- Loosen drain plugs and drain fuel into a suitable container.
- Rotate retaining rings clockwise 1/4 turn; remove with final and primary filter elements.
- Loosen ring and remove water separator bowl with primary element; drain/clean/dry bowl.
- Inspect filter mounting base; install new elements indexed and firmly seated.
- Align keys on filter element with slots in filter base.
- Install retaining ring, hand tighten counterclockwise until it snaps into detent.
- Install water separator bowl on primary fuel filter and tighten ring.
- Turn dosing element with a filter or strap wrench to remove; discard.
- Remove cap from new dosing element; wipe header sealing surfaces.
- Install dosing element by hand; apply extra 3/4 turn after gasket contact.
- Install air bleed line; reconnect water in fuel sensor wiring; open fuel shut-off valve.
- Key on 30 seconds to prime, then start engine and check for leaks.
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.