Servicing Item 16--17: Wheel Spokes, Wheels, Wheel Hub Bearings, Brakes

The Wheel spokes must be checked for uniform tension every 6000 miles. Clean brakes, brake drums, brake shoes and brake linings (minimum thickness 0.06") and check brake cams and actuating parts Grease brake cams lightly. Do not emery the shiny film on the brake linings, do not bevel the linings.
These operations should be performed only by an authorized BMW Dealer
Figure 52