Detroit

4700 mm 47.02.005

The only maintenance necessary on an Detroit fuel/water separator is to replace the filter element. See Fig..

  1. Mounting Head

  2. Sight Bowl

Fig. 1,  Detroit Fuel/Water Separator

  1. Drain off some fuel by loosening the vent plug and opening the drain valve.
  2. Disconnect the water sensor and heater connections if equipped.
  3. Remove the bowl by turning counterclockwise.
  4. Remove the element, bowl O-ring, and element o-ring. Dispose of them in an environmentally acceptable manner.
  5. Thoroughly clean all of the threads and sealing surfaces. Even a small amount of dirt will prevent the fuel/water separator from sealing, and an air leak may result.
  6. Apply a coating of clean fuel or motor oil to the new O-ring and to the new element o-ring.
  7. Insert the new element into the upper housing.

    8. Note: Do not use tools to tighten the bowl and element.

  8. Spin the bowl onto the onto the upper housing by hand only.
  9. Connect the water sensor and heater connectors if equipped.
  10. If equipped with a primer pump, prime the fuel/water separator as follows.
    1. Loosen the vent plug. Then operate the primer pump until the fuel purges at the vent plug.
    2. Close the vent plug.
  11. Start the engine and check for fuel leaks.
  12. Shut down the engine and correct any fuel leaks.
Note:
Parent topic: Fuel/Water Separator Element Checking and Replacement
Document Number: 0000121061
Manual Publication Date: 2024-05-23
Topic Publication Date: 2024-10-31