Fuel Tubes, Filter and Water Separator

Fuel Tubes

If fuel tubes are suspected of contamination or leaks, inspect tubes for cracks and fittings for leaks. Replace any tubes that are damaged. If fuel tube contains contaminated fuel, flush with clean diesel fuel, drain fuel filter and inspect filter element.

Fuel Filter/Heater/Water Separator Drain Procedure

 WARNING: THE VEHICLE MUST BE STOPPED WITH THE ENGINE OFF WHEN DRAINING THE FILTER BOWL. FUEL MAY IGNITE IF SEPARATOR IS DRAINED WHILE THE ENGINE IS RUNNING OR VEHICLE IS MOVING.

 CAUTION: Diesel fuel can damage asphalt and other surfaces. Always place a drain pan under the separator to collect the fuel and dispose properly.

NOTE: The filter bowl should be drained at 8,000 km (5000 mile) intervals according to the maintenance schedule. At this service interval, if the warning light is not glowing, look at the drained fluid to determine when clear diesel fuel is flowing. Stop draining the filter bowl as soon as clear diesel fuel appears.

1. Stop the vehicle and shut off the engine (6007).

2. Open the hood. Place an appropriate container under the filter bowl drain to be located at front corner of engine (refer to the appropriate illustrations in this section) to collect water/fuel.

3. Open filter bowl drain valve by turning counterclockwise (as viewed from bottom). Allow to drain for approximately 25 seconds or until clean fuel is observed. Close drain valve by turning clockwise until firmly seated.

4. Verify that the fuel drain is closed and remove the container from under the vehicle and properly dispose of contents. Close the hood.

5. Restart the engine and check WATER IN FUEL indicator light. The light should not glow. If it continues to glow, have fuel system checked and repaired.