W 250 Pickup L6-359 5.9L DSL (1989)
Fuel Filter: Service and Repair
Fuel Filter Replacement
Disconnect the water-in-filter sensor (WIF) electrical connection.
Remove the fuel filter assembly with a standard filter wrench.
NOTE: The fuel heater assembly should not move during the filter removal.
Remove the square cut 0-ring from the filter mounting bushing.
Drain fuel/water separator filter and remove WIF and fuel/water drain valve.
NOTE: This assembly is threaded into the filter element and it is sealed with an 0-ring.
Install new square cut 0-ring on filter mounting bushing. Reinstall the WIF sensor into a new fuel filter element.