John Deere — Replacing Primary Fuel Filter/Water Separator
Maintenance
From a John Deere service manual — check it applies to your exact model before use.
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Procedure
- Close fuel shut-off valve at bottom of fuel tank.
- Clean area surrounding fuel filter assembly.
- Remove primary fuel filter with filter wrench; drain element and sediment bowl.
- Clamp element in a vise and remove clear water separator bowl.
- Clean sediment bowl and dry with compressed air.
- Lubricate sediment bowl O-ring with clean engine oil and install onto new element; tighten 1/2 turn after O-ring contacts.
- Apply light coating of engine oil to filter gasket/O-ring.
- Close sediment bowl drain adapter and fill filter element with clean diesel fuel.
- Install element; tighten 1-1/2 turn after gasket contacts sealing surface.
- Install plugs, open fuel shut-off valve and bleed fuel system.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Primary Fuel Filter Header-to-Bracket—Torque 50 N·m
- Primary Fuel Filter Header Plugs—Torque 47 N·m (35 lb-ft)
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.