W 250 Pickup L6-359 5.9L DSL (1989)
Fuel Filter: Service and Repair
Fuel/Water Separator Filter Replacement
CAUTION: When removing/installing the fuel/water separator filter, make sure that the fuel heater electrical connector is not turned against the engine.
The electrical connector could get damaged or opened.
REMOVAL
Fuel/Water Separator & Water-In-Fuel Separator
1.
Disconnect the Water-In-Fuel (WIF) sensor electrical connector from the sensor.
2.
Remove the fuel/water separator filter.
NOTE: The fuel heater should not move when the fuel/water separator filter is removed or installed.
Water-In-Fuel Sensor R & R
3.
Remove the square-cut O-ring from the filter connector at the bottom of the fuel heater.
4.
Drain the fuel/water separator filter.
5.
Remove the water-in-fuel sensor, the O-ring, and the fuel/water drain valve assembly from the separator filter.
INSTALLATION
1.
Install new O-ring on the water-in-fuel sensor.
2.
Install water-in-fuel sensor into new fuel/water separator filter assembly.
NOTE: If the fuel/water separator assembly is not filled with clean diesel fuel before reinstalling, manual air bleeding of the fuel system may be
required.
3.
Fill fuel/water separator assembly with clean fuel.
4.
Apply a light film of clean unused engine oil to the fuel/water separator seal.
5.
Install a new square-cut O-ring to the filter connector on the bottom of the fuel heater.
6.
Install fuel/water separator assembly. Tighten 1/2 turn after the fuel/water separator assembly makes contact.
7.
Connect water-in-fuel electrical connector to the water-in-fuel sensor.