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Home >> Chrysler >> 2018 >> 300 C >> Repair and Diagnosis >> Engine Performance >> Fuel Delivery >> Fuel System >> Fuel Delivery, Gas >> Module, Fuel Pump >> Installation >> Main Fuel Pump Module
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Main Fuel Pump Module

WARNING:

No sparks, open flames or smoking. Risk of poisoning from inhaling and swallowing fuel. Pour fuel only into appropriately marked OSHA approved containers. Wear protective clothing. Risk of injury to eyes and skin from contact with fuel.

CAUTION:

Do not allow the float arm of the main fuel pump module to come in contact with any part of the fuel tank during removal or installation, damage to the float arm and fuel level sending card may result.

GC0095754Courtesy of CHRYSLER GROUP, LLC
NOTE:

The Auxiliary Fuel Pump Module must be installed before the Main Fuel Pump Module.

  1. If the auxiliary fuel pump module is removed, refer to AUXILIARY FUEL PUMP MODULE .
    NOTE:

    Whenever the fuel pump module is serviced, the rubber O-ring seal must be replaced.

  2. Install a new rubber O-ring seal.
  3. Using caution not to bend the float arm, lower the bottom section of the main fuel pump module into the fuel tank.
  4. Connect the fuel return lines (1, 2) to the main fuel pump module.
    GC0095753Courtesy of CHRYSLER GROUP, LLC
  5. Connect the fuel supply line (1) to the main fuel pump module.
    GC0080392Courtesy of CHRYSLER GROUP, LLC
  6. Connect the wire harness connectors at the top section of the main fuel pump module.
  7. Join the upper section and lower section of the main fuel pump module together.
  8. Position the main fuel pump module as noted during removal.
    CAUTION:

    Verify the electrical wires are tucked away into the fuel tank so they don't get pinched between the top of the fuel pump module and the rubber O-ring seal.

    CAUTION:

    An indexing arrow is located on top of the fuel pump module to clock it's position into the fuel tank. The fuel pump module must be installed in the same position as removed.

    GC0095734Courtesy of CHRYSLER GROUP, LLC
  9. Align the rubber O-ring seal and lower the main fuel pump module into position.
  10. Verify the main fuel pump module is in the same position as noted during removal. This step must be performed to prevent the float from contacting the side of the fuel tank.
    GC0095735Courtesy of CHRYSLER GROUP, LLC
  11. Position the lock ring over top of the main fuel pump module.
  12. Position the SAE Fuel Pump Lock Ring Wrench (special tool #9340, SAE Fuel Pump Lock Ring Wrench) (1) into the notches on the outside edge of the lock ring.
  13. Install a 1/2 inch drive breaker bar into the SAE Fuel Pump Lock Ring Wrench (special tool #9340, SAE Fuel Pump Lock Ring Wrench).
  14. Rotate the breaker bar clockwise until all seven notches of the lock ring have engaged.
    GC0095734Courtesy of CHRYSLER GROUP, LLC
  15. Connect the electrical connector (1) to the main fuel pump module.
  16. Fill the fuel tank and check for leaks around the rubber O-ring seal.
    GC0080395Courtesy of CHRYSLER GROUP, LLC
  17. Install the main fuel pump module plastic access cover.
    GC0095733Courtesy of CHRYSLER GROUP, LLC
  18. Lower the foam pad covering back into place.
    GC0080391Courtesy of CHRYSLER GROUP, LLC
  19. Push the rear lower seat cushion back and down and install the seat cushion.
  20. Connect the negative battery cable.
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