Volvo Coupes/Sedans/Wagons 1970-1989 Repair Guide

Pinion Seal

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REMOVAL & INSTALLATION



All Models Except Those Equipped With Multi-link Suspension

See Figure 1

  1. Disconnect the driveshaft at the final drive unit (differential).
  2.  
  3. Loosen and remove the large center nut in the center of the pinion flange. The use of a counterhold device is highly recommended. (Volvo No. 5149 or similar)
  4.  
  5. Use a puller to remove the flange from the housing.
  6.  
  7. Remove the old seal from the inside of the casing and discard it. Prepare the new seal by greasing the lip area and greasing the small spring to hold it in place during installation.
  8.  



Click image to see an enlarged view

Fig. Fig. 1: In sequence: the pinion seal is removed and installed as shown-if air tools are not available, a ratchet and socket will work

To install:
  1. Install the seal using suitable drivers; do not crimp or gouge the seal during installation.
  2.  
  3. With an installation tool (Volvo No. 5156 or similar), reinstall the flange in the housing.
  4.  
  5. Check the serial number on the rear axle. If it begins with an "S", follow step 7b, below. If it does NOT contain an S prefix, continue with 7a below.
    1. Install the center nut and tighten it to 145-180 ft. lbs. (197-244 Nm). Use a counterhold to hold the flange while tightening.
    2.  
    3. Axles denoted by the S prefix in their serial number contain a compression sleeve within the differential housing. On these cars, install the center nut and carefully tighten it to 1.3 ft. lbs.(finger tight only). Make sure that the brakes are not applied and turn the flange at about 1 revolution per second so as to tighten the nut. As an alternative, the nut may be tightened with a wrench to at least 130 ft. lbs. (176 Nm).
    4.  

  6.  
  7. Reinstall the driveshaft. Check the oil level within the final drive and top up as necessary.
  8.  

Vehicles With Multi-link Suspension

See Figure 2

  1. Matchmark the driveshaft flange and the final drive (differential) flange. Remove the bolts and separate the shaft from the final drive.
  2.  
  3. Loosen and remove the large center nut in the center of the pinion flange. The use of a counterhold device is highly recommended. (Volvo No. 5149 or similar). Remove the one additional bolt from the flange. This bolt is a weight which serves to balance the rotational forces of the driveshaft.
  4.  
  5. Matchmark or etch reference marks on the flange and its center shaft.
  6.  
  7. Drain the oil from the housing.
  8.  
  9. Use a puller to remove the flange from the housing.
  10.  
  11. Remove the old seal from the inside of the casing and discard it. Prepare the new seal by greasing the lip area and greasing the small spring to hold it in place during installation. The use of a seal puller such as Volvo No. 5069 is highly recommended.
  12.  



Click image to see an enlarged view

Fig. Fig. 2: Use a bearing puller to properly withdraw the seal-Volvo tool No. 5069 is shown

  1. Install the seal using suitable drivers; do not crimp or gouge the seal during installation.
  2.  
  3. Position the flange so that the marks align. With an installation tool (Volvo No. 5156 or similar), reinstall the flange in the housing.
  4.  
  5. Install a new, lightly oiled center nut and tighten it to 132-145 ft. lbs. (179-197 Nm).
  6.  


WARNING
Do not overtighten the center nut. The pinion bearings will become over-adjusted and fail prematurely.

  1. Install the bolt for weight in its original position.
  2.  
  3. Install the driveshaft, observing correct placement as shown by the matchmarks. Use new nuts and bolts and tighten them to 36 ft. lbs. (49 Nm).
  4.  
  5. Refill the final drive unit with oil.
  6.  

 
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