BMW Coupes and Sedans 1970-1988 Repair Guide

Body Lubrication and Maintenance

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FRONT WHEEL BEARINGS



Adjustment

The front wheels each rotate on a set of opposed, tapered roller bearings. The grease retainer at the inside of the hub prevents lubricant from leaking.

To check the condition of the grease, proceed as follows:

  1. Raise and support the front of the vehicle on jackstands.
  2.  
  3. Remove the grease cap and remove any excess grease from the end of the spindle.
  4.  
  5. Remove the cotter pin and nut lock shown in the illustration.
  6.  
  7. Rotate the wheel, hub and drum assembly while tightening the adjusting nut to 17-25 ft. lbs. (22-32 Nm) in order to seat the bearings.
  8.  
  9. Back off the adjusting nut 1 / 2 rotation (180°), then retighten the nut to 10-15 ft.. lbs. (13-19 Nm).
  10.  
  11. Locate the nut lock on the adjusting nut so that the castellations on the lock are lined up with the cotter pin hole in the spindle.
  12.  
  13. Install the new cotter pin, bending the ends of the cotter pin around the castellated flange of the nut lock.
  14.  
  15. Check the wheel for proper rotation, then install the grease cap. If the wheel still does not rotate properly, inspect and clean or replace the wheel bearings and cups.
  16.  


WARNING
Sodium-based grease is not compatible with lithium-based grease. Read the package labels and be careful not to mix the two types. If there is any doubt as to the type of grease used, completely clean the old grease from the bearing and hub before replacing.

Repacking
  1. Raise and support the front of the vehicle on jackstands.
  2.  
  3. Remove the wheel cover. Remove the wheel.
  4.  
  5. Remove the caliper from the disc and wire it to the underbody to prevent damage to the brake hose. See Brakes .
  6.  
  7. Remove the grease cap from the hub. Then, remove the cotter pin, nut lock, adjusting nut and flat washer from the spindle. Remove the outer bearing assembly from the hub.
  8.  
  9. Pull the hub and disc assembly off the wheel spindle.
  10.  
  11. Remove and discard the old grease retainer. Remove the inner beari