Racor 690

cen mm 47.02.000

The only service necessary on Racor fuel separators is to replace the filter element.

    Warning: Diesel fuel is flammable and can ignite if exposed to an open flame, intense heat, or other ignition source. Do not drain fuel near, or expose fuel vapor to open flame or intense heat. Exposure to open flame or intense heat could start a fire, possibly resulting in personal injury or property damage. When working on a fuel system, have a fire extinguisher within easy reach.

  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 element and bowl, together, by turning counterclockwise.
  4. Remove the bowl from the element, and clean the O-ring.
  5. Apply a coating of clean fuel or motor oil to the new O-ring and element seal.
  6. Spin the bowl onto the new element, then spin them both onto the filter head snugly, by hand only.

    7. Important: Do not use tools to tighten.

  7. Connect the water sensor and heater connectors, if equipped.
  8. Prime the fuel separator.
    1. Remove the 3/8-inch metal plug located at the top of the fuel/water separator (see Fig., Ref. 2), and manually fill the unit with diesel fuel.
    2. Replace and tighten the 3/8-inch metal plug when the unit is full.
  9. Start the engine and check for fuel leaks.
  10. Shut down the engine and correct any fuel leaks.

    1. Beige Mounting Head

    2. Metal Plug, 3/8" NPT

    3. Bowl O-Ring

    4. Bowl Bevel-Cut Gasket

    5. Bowl Probe Plug

    6. Water Sensor Probe

    7. Heater Connector

    8. Bowl Drain Valve Assembly

    9. Bowl with Drain and Water Sensor

    10. Service Element

    Fig. 1, Racor 690 Fuel Separator

Note:
Parent topic: Replacement of the Racor Fuel Separator Element
Document Number: 0000122435
Manual Publication Date: 2025-02-11
Topic Publication Date: 2024-06-04