Brake Drum Inside Diameter Check

^ Ensure that the maximum inside diameter of the drum does not exceed 201.0 mm (7.913 inch).
^ If the inside diameter exceeds maximum limits, the proper heat dissipation will be adversely affected and may cause distortion of the drum.
^ Before refinishing a drum, measure the inside diameter. During refinishing, only remove enough metal in order to obtain a true, smooth braking surface.
^ If a drum will not true up when refinished to the maximum allowable inside diameter specification, replace the drum.