Commutator End Frame & Bearing

Replace armature assembly is commutator outer diameter is less than 1.378" (36 mm) or if undercut depth is less than .008" (.2 mm). DO NOT  undercut insulation. Ensure commutator end bearing has not spun in frame. If bearing has spun, replace frame and bearing. DO NOT  lubricate bearing. If bearing is dry or damaged, replace bearing. Install new bearing no deeper then .080 in (2.1 mm).