Detroit

49X mm 47.02.001

    Warning: Fluid circulated through the fuel/water separator to heat the fuel may be diesel fuel returned from the engine, or engine coolant. Drain the fuel/water separator only when the engine and fluids have cooled. Draining it when the engine is hot could cause severe personal injury due to scalding.

    If returning fuel is released into the atmosphere, its vapors can ignite in the presence of any ignition source. Do not expose the fuel to, or work with the fuel system near, open flame or intense heat. To do so could cause fire, possibly resulting in serious personal injury or property damage.

    Important: For chassis-mounted fuel filter replacement, refer to the engine manufacturer's service literature for replacement intervals.

  1. Park the vehicle on a level surface, shut down the engine, and set the parking brake. Chock the tires.
  2. Place a suitable container under the fuel/water separator, to collect the draining fuel. The drain valve has a 3/8 inch (9.5 mm) slip-on hose connection.
  3. Open the drain valve. See Fig..

    1. O-Ring, Filter Element

    2. O-Ring, Clear Bowl

    3. Drain Valve

    4. WIF Sensor

    5. Heater

    6. Clear Bowl

    7. Filter Element

    8. Port Plug, M22

    9. Vent Plug

    10. Return Fuel Heating Loop

    Fig. 1, Fuel Water Separator, Detroit

  4. When the fuel/water separator is completely drained, close the valve.
  5. If equipped, remove the water in fuel (WIF) and heater harness connectors. See Fig..
  6. Remove bowl and filter. Dispose of the filter and the O-ring in an environmentally acceptable manner. Fig..

    1. Fill Port Plug (Optional)

    2. Return Fuel Heating Loop

    3. Fuel Outlet Port

    4. Fuel Inlet Port

    5. Fuel Heater, 12V

    6. WIF Sensor

    7. Clear Bowl

    8. Filter Element

    9. Primer (Optional)

    Fig. 2, Fuel/Water Separator Assembly, Detroit

  7. Lubricate new O-rings with motor oil or clean fuel and install them with the new filter.
  8. Install the bowl and tighten snugly by hand or using a bowl wrench.
  9. If equipped, install the WIF sensor and heater harness connectors.
  10. If equipped with a priming pump, loosen the drain plug and operate the priming pump until the fuel comes out at the drain.
  11. If not equipped with a priming pump, remove the fill port on top of the assembly, fill the filter element and bowl with clean fuel. Install the fill port and tighten snugly.
  12. Start the engine and check for fuel leaks.
  13. Shut down the engine and correct any fuel leaks.
Note:
Parent topic: Fuel/Water Separator Element Checking and Replacement
Document Number: 0000119388
Manual Publication Date: 2024-05-16
Topic Publication Date: 2024-10-31