Mercedes-Benz Cars 2000-05

Pinion Seal

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Removal & Installation



  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove or disconnect the following:

    Driveshaft
     

  4.  
  5. Using torque wrench, loosen hex nut while measuring torque reading.

    Drive flange
     
    Pinion seal
     

  6.  

To install:

  1. Coat the pinion seal lip clean hypoid gear oil.
  2.  
  3. Install or connect the following:

    Pinion seal
     
    Drive flange
     
    New self-locking hexagon collar nut. Torque the nut to measured torque.
     
    Driveshaft
     

  4.  



Click image to see an enlarged view

Fig. Exploded view of the components associated with the front drive pinion on 4MATIC

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove or disconnect the following:

    Axle shaft
     
    Drive pinion with bearing cover
     

  4.  
  5. Mark the bearing cover relative to the front axle drive housing.
  6.  
  7. Remove or disconnect the following:

    Rubber O-ring
     
    Pinion seal
     

  8.  

To install:

  1. Coat the pinion seal lip and the rubber O-ring with clean hypoid transmission oil.
  2.  
  3. Install or connect the following:

    Pinion seal
     
    O-ring
     
    Bearing cover. Torque the bolts to 26 ft. lbs. (35 Nm).
     
    Drive pinion and flange with new self-locking hexagon collar nut. Torque the nut to 350 ft. lbs. (475 Nm).
     
    Axle shaft
     

  4.  

4-Matic
  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove or disconnect the following:

    Axle shaft
     
    Drive pinion with bearing cover
     

  4.  
  5. Mark the bearing cover relative to the front axle drive housing.
  6.  
  7. Remove or disconnect the following:

    Rubber O-ring
     
    Pinion seal
     

  8.  

To install:

  1. Coat the pinion seal lip and the rubber O-ring with clean hypoid transmission oil.
  2.  
  3. Install or connect the following:

    Pinion seal
     
    O-ring
     
    Bearing cover. Torque the bolts to 26 ft. lbs. (35 Nm).
     
    Drive pinion and flange with new self-locking hexagon collar nut. Torque the nut to 350 ft. lbs. (475 Nm).
     
    Axle shaft
     

  4.  

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove or disconnect the following:

    Axle shaft
     
    Drive pinion with bearing cover
     

  4.  
  5. Mark the bearing cover relative to the front axle drive housing.
  6.  
  7. Remove or disconnect the following:

    Rubber O-ring
     
    Pinion seal
     

  8.  

To install:

  1. Coat the pinion seal lip and the rubber O-ring with clean hypoid transmission oil.
  2.  
  3. Install or connect the following:

    Pinion seal
     
    O-ring
     
    Bearing cover. Torque the bolts to 26 ft. lbs. (35 Nm)
     
    Drive pinion and flange with new self-locking hexagon collar nut. Torque the nut to 350 ft. lbs. (475 Nm).
     
    Axle shaft.
     

  4.  

4-Matic
  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. Remove or disconnect the following:

    Axle shaft
     
    Drive pinion with bearing cover
     

  4.  
  5. Mark the bearing cover relative to the front axle drive housing.
  6.  
  7. Remove or disconnect the following:

    Rubber O-ring
     
    Pinion seal
     

  8.  

To install:

  1. Coat the pinion seal lip and the rubber O-ring with clean hypoid transmission oil.
  2.  
  3. Install or connect the following:

    Pinion seal
     
    O-ring
     
    Bearing cover. Torque the bolts to 26 ft. lbs. (35 Nm)
     
    Drive pinion and flange with new self-locking hexagon collar nut. Torque the nut to 350 ft. lbs. (475 Nm).
     
    Axle shaft.
     

  4.  

 
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