Mercedes-Benz Truck 2000-05

Fuel Pump

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Removal & Installation



  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Relieve the fuel system pressure.
  4.  
  5. Disconnect the negative battery cable.
  6.  
  7. Empty the fuel tank into a suitable container.
  8.  
  9. Raise the left rear seat approximately 20 inches (50 cm).
  10.  
  11. Lift the carpeting to gain access to the fuel pump cover.
  12.  
  13. Remove or disconnect the following:

    Fuel pump cover
     
    Fuel pump electrical connector
     

  14.  


NOTE
Be sure not to kink the fuel pipes.



Supply and return fuel pipes clips and the pipes
 
Union nut mounting the fuel pump-to-the tank
 
Fuel pump from the tank
 

To install:


NOTE
Lightly oil the fuel pump sealing O-ring to simplify the installation.

  1. Install or connect the following:

    Fuel pump into the tank using a new union nut and O-ring. Tighten the union nut to 50 ft. lbs. (65 Nm).
     
    Supply and return lines to the fuel pump
     
    Fuel pump electrical connector
     
    Fuel pump access cover and the rear seat
     

  2.  
  3. Fill the fuel tank.

    Negative battery cable
     

  4.  
  5. Read fault memory, encode the radio and normalize the power windows.
  6.  
  7. Start the vehicle and check for leaks.
  8.  

  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. Relieve the fuel system pressure.
  4.  
  5. Disconnect the negative battery cable.
  6.  
  7. Empty the fuel tank into a suitable container.
  8.  
  9. Raise the left rear seat approximately 20 inches (50 cm).
  10.  
  11. Lift the carpeting to gain access to the fuel pump cover.
  12.  
  13. Remove or disconnect the following:
    NOTE
    Be sure not to kink the fuel pipes.



    Fuel pump cover
     
    Fuel pump electrical connector
     



    Supply and return fuel pipes clips and the pipes
     
    Union nut mounting the fuel pump-to-the tank
     
    Fuel pump from the tank
     

  14.  

To install:

Click image to see an enlarged view

Fig. Exploded view of the fuel pump and its mounting


NOTE
Lightly oil the fuel pump sealing O-ring to simplify the installation.

  1. Install or connect the following:

    Fuel pump into the tank using a new union nut and O-ring. Tighten the union nut to 50 ft. lbs. (65 Nm).
     
    Supply and return lines to the fuel pump
     
    Fuel pump electrical connector
     
    Fuel pump access cover and the rear seat
     

  2.  
  3. Fill the fuel tank.

    Negative battery cable
     

  4.  
  5. Read fault memory, encode the radio and normalize the power windows.
  6.  
  7. Start the vehicle and check for leaks.
  8.  

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Relieve the fuel system pressure.
  4.  
  5. Disconnect the negative battery cable.
  6.  
  7. Empty the fuel tank into a suitable container.
  8.  
  9. Raise the left rear seat approximately 20 inches (50 cm).
  10.  
  11. Lift the carpeting to gain access to the fuel pump cover.
  12.  
  13. Remove or disconnect the following:
    NOTE
    Be sure not to kink the fuel pipes.



    Fuel pump cover
     
    Fuel pump electrical connector
     



    Supply and return fuel pipes clips and the pipes
     
    Union nut mounting the fuel pump-to-the tank
     
    Fuel pump from the tank
     

  14.  

To install:


NOTE
Lightly oil the fuel pump sealing O-ring to simplify the installation.

  1. Install or connect the following:

    Fuel pump into the tank using a new union nut and O-ring. Tighten the union nut to 50 ft. lbs. (65 Nm).
     
    Supply and return lines to the fuel pump
     
    Fuel pump electrical connector
     
    Fuel pump access cover and the rear seat
     

  2.  
  3. Fill the fuel tank.

    Negative battery cable
     

  4.  
  5. Read fault memory, encode the radio and normalize the power windows.
  6.  
  7. Start the vehicle and check for leaks.
  8.  

 
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