Caterpillar 3406 — Replace Final Fuel Filter
Maintenance · Fuel Filters
For the Caterpillar 3406, from the Caterpillar operator's manual.
Applies to: Caterpillar 3406
Before you start
- Do not pour fuel into the new filter element before installing. Prime the system as instructed in the topic To Prime the Fuel System.
Parts for this job
- 3S3875 Fuel filter eBay $49.99
Part numbers from the service-parts list for Caterpillar 3406. Verify against your serial number before ordering; some links are affiliate links.
Procedure
- Unscrew and remove the filter.
- Clean the gasket sealing surface on the filter base.
- Lubricate the new filter gasket with clean diesel fuel.
- Tighten the filter by hand until the gasket contacts the base, then tighten 2/3 to 3/4 turn more.
- Turn the fuel supply valve on.
- Start the engine and run at 1000 RPM for several minutes and check for leaks. If the engine fails to start, prime the fuel system.
Specs & values
- Tighten the filter by hand until the gasket contacts the base, then tighten 2/3 to 3/4 turn more.
Full service-parts list: Caterpillar 3406 →
Source: Caterpillar operator's 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.