Volvo Coupes/Sedans/Wagons 1970-1989 Repair Guide

Front Wheel Bearings

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REPLACEMENT




CAUTION
This procedure requires removal of the brakes. Brake pads and shoes may contain asbestos, which has been determined to a cancer causing agent. Never clean the brake surfaces with compressed air! Avoid inhaling and dust from brake surfaces! When cleaning brakes, use commercially available brake cleaning fluids.


CAUTION
The use of the correct special tools or their equivalent is REQUIRED for this procedure.

All Models Except 700 Series

See Figures 1, 2, 3, 4 and 5

  1. Loosen the wheel nuts, elevate the car and safely support it with jackstands under the lower control arms.
  2.  
  3. Plug the vent hole in the brake fluid reservoir to prevent spillage and leakage.
  4.  
  5. Remove the wheels. Disconnect the brake hose at its joint to the metal pipe. Catch any spilled fluid and plug the open lines.
  6.  
  7. Remove the attaching bolts and remove the brake caliper. Note the position of any shims in the mounting.
  8.  



Click image to see an enlarged view

Fig. Fig. 1: Remove the dust cap by prying it outwards with a chisel and hammer

  1. Remove the grease cap. Remove the cotter pin, the castle nut and mount a hub puller onto the disc.
  2.  



Click image to see an enlarged view

Fig. Fig. 2: Remove the cotter pIn from the castellated axle nut

  1. Pull the hub off. The outer bearing will come off with it; the inner bearing may stay on the stub axle. If this happens, simply use a bearing puller of the correct size to remove the bearing from the axle.
  2.  



Click image to see an enlarged view

Fig. Fig. 3: Use the correct socket to remove the axle nut

  1. Remove the brake disc from the hub. Bearings can now be inspected and cleaned. Clean all the components thoroughly, including the inside of the hub. Every trace of the old grease must be removed.
  2.  
  3. After cleaning, inspect all the parts. Look carefully for any signs of imperfect surfaces, cracking, bluing or looseness. Check the matching surface or race on which the rollers run. Any sign of imperfection requires replacement.
  4.  
  5. After the bearings have been cleaned, inspected and are totally dry, repack them using a quality bearing or multi-purpose grease. Each bearing must be fully packed; the use of a bearing packer is highly recommended although the job can be done by hand if close attention is paid.
  6.  
  7. The space inside the hub should also be packed; remember that the stub axle comes through here-don't pack it solid.
  8.  
  9. If it is necessary to replace the races, they should be removed from the hub using tools which match the full diameter of the race. Use of a punch or drift may cause damage. The seals, made of pressed felt, should be soaked in light engine oil before installation.
  10.  



Click image to see an enlarged view

Fig. Fig. 4: Remove the outer bearing and related hardware once the nut is removed

  1. Place the inner bearing in position within the hub. Using the correct sized drift, install the inner seal.
  2.  



Click image to see an enlarged view

Fig. Fig. 5: Remove the brake disc from the axle shaft-the inner bearing is held in the assembly

  1. Install the hub onto the stub axle and fit the outer bearing in place. Install the washer and castle nut.
  2.  
  3. Adjust the front wheel bearings by spinning the hub and simultaneously tightening the center nut to 50 ft. lbs. (68 Nm). Then loosen the center nut two flats on the center nut. If the nut recess (groove) doesn't line up with the cotter pin hole, loosen the nut just a bit until it aligns. Install a new cotter pin and check that the hub spins freely without excess sideplay.
  4.  
  5. Install the brake disc on the hub.
  6.  
  7. Fill the grease cap half full with bearing grease and install the cap.
  8.  
  9. Reinstall the caliper, observing shim placement as noted during removal.
  10.  
  11. Remove the plugs and connect the brake lines.
  12.  
  13. Bleed the brakes and remove the plug from the reservoir vent hole.
  14.  
  15. Install the wheel and lower the vehicle to the ground. Final tighten the wheel lugs.
  16.  

700 Series
  1. Safely elevate and support the front end. Remove the wheel.
  2.  
  3. Loosen the retaining bolts and remove the brake caliper. Hang the caliper out of the way with a piece of stiff wire.
  4.  
  5. Pry off the grease cap. Remove the cotter pin and castle nut.
  6.  
  7. Remove the brake disc. The outer bearing will come off with the disc. Use a bearing puller to remove the inner bearing from the spindle if it is difficult to remove.
  8.  

On 1988-89 760 and 780 cars with Multi-link rear suspension, the brake disc will be a separate item. Removing the disc will expose the hub locknut, which must also be removed. Both wheel bearings are found inside the hub.

  1. With the disc supported on blocks of wood, remove the inner seal with a seal puller, then remove the inner bearing race with a long brass punch.
  2.  
  3. Remove the outer race with the use of the proper size driver. The bearings can now be inspected and cleaned.
  4.  
  5. Clean all the components thoroughly, including the inside of the disc. Every trace of the old grease must be removed.
  6.  
  7. After cleaning, inspect all the parts. Look carefully for any signs of imperfect surfaces, cracking, bluing, rust or looseness. Check the matching surface or race on which the rollers run. Any sign of imperfection requires replacement.
  8.  
  9. After the bearings have been cleaned, inspected and are totally dry, repack them using a quality bearing or multi-purpose grease. Each bearing must be fully packed; the use of a bearing packer is highly recommended although the job can be done by hand if close attention is paid.
  10.  
  11. The space inside the disc should also be packed; remember that the spindle comes through here-don't pack it solid.
  12.  
  13. If the races were removed, install them into the disc using drivers of proper size. Make sure they install straight and are not cocked or out of place. For 1988-89 760 and 780 with Multi-link rear suspension, the bearings install into the hub, not the disc.
  14.  
  15. Install the inner bearing with a new seal into the brake disc or hub. Smear the seal lip with grease.
  16.  
  17. Install the disc, the outer bearing and the castle nut. For 1988-89 760 and 780 with Multi-link rear suspension, install the hub and with a NEW locknut. Do not reuse the old nut; bearing damage may result. Tighten the new nut to 74 ft. lbs. (100 Nm) PLUS an additional 45° of rotation.
  18.  
  19. Install the brake caliper. Volvo recommends the use of new retaining bolts. The bolts should be tightened to 74 ft. lbs. (100 Nm).
  20.  
  21. Adjust the front wheel bearing by spinning the disc several times and then tightening the nut to 42 ft. lbs. (57 Nm). Loosen the nut 1 / 2 turn, then retighten to 12 inch lbs. (1.3 Nm). This is just enough to hold the bearing in place but not enough to develop any side loading.
  22.  
  23. Install a new cotter pin. If the hole in the spindle doesn't align with the castle nut, tighten the nut just until the hole and slot align.
  24.  
  25. Install the grease cap. Install the wheel.
  26.  
  27. Lower the car to the ground and tighten the wheel to 63 ft. lbs. (85 Nm).
  28.  

 
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