Detroit

57X mm 47.02.001

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

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

  1. Mounting Head

  2. Sight Bowl

  3. Drain Valve

  4. Sensor

Fig. 1, Detroit Fuel/Water Separator

    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.

    Note: Removing the bypass valve port plug completely could dislodge the valve and spring, exposing the downstream systems to unfiltered fuel.

  1. Empty the bowl by opening the drain valve and loosening the vent plug, or bypass valve port if equipped with a fuel priming bulb. See Fig. and Fig..
  2. Disconnect the water sensor and heater connections if equipped.
  3. Loosen the bowl with a wrench from the kit PKI PFRK61730, shown in Fig., and unscrew it.

    Fig. 2, Parker Fuel/Water Separator Bowl Wrench

  4. Remove the element, bowl O-ring, and element O-ring.
  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. Important: Do not use tools to tighten the bowl and element.

  8. Hand tighten the bowl into the upper housing.
  9. Connect the water sensor and heater connectors if equipped.

    10. Note: Removing the bypass valve port plug completely could dislodge the valve and spring, exposing the downstream systems to unfiltered fuel.

  10. If equipped with a primer pump, prime the fuel/water separator as follows.
    1. Loosen the bypass port valve plug, but do not remove it. Then operate the primer pump until the fuel purges at the plug.
    2. Tighten the bypass valve plug to 22 lbf·ft (30 N·m). See Fig..

    1. Fill Port Plug (Optional)

    2. Return Fuel Heating Loop

    3. Bypass Valve Port Plug

    4. Fuel Inlet Port

    5. Fuel Inlet Port

    6. Fuel Heater, 12V

    7. WIF Sensor

    8. Clear Bowl

    9. Filter Element

    10. Primer (Optional)

    Fig. 3, Bypass Valve Port Plug

  11. If not equipped with a priming bulb, prime the filter as follows.
    1. Remove the vent port cap and fill the unit with clean fuel.
    2. Hand tighten the port cap.
  12. Start the engine and check for fuel leaks.
Note:
Parent topic: Fuel/Water Separator Element Checking and Replacement
Document Number: 0000116776
Manual Publication Date: 2024-05-13
Topic Publication Date: 2025-04-05