This is the eleventh lesson in the AC/DC Motor Maintenance Course. The lesson demonstrates the process of preparing a commutator for reconditioning, how to properly cut mica, how to check the commutator after maintenance, and explains the purpose of performing a commutator run-in procedure.

Module Objectives

• Explain how to prepare a commutator for reconditioning.
• Explain how to undercut the mica of a commutator.
• Describe how to clean and check the commutator after maintenance.
• Explain the purpose of performing a commutator run-in procedure.