Parts Replacement & Testing: Commutator
If commutator surface is scored, rough or burnt, dress with a lathe just enough to remove defective area and polish with a strip of fine emery paper. Check insulation undercut depth and it must be 0.02" deep.
If commutator surface is scored, rough or burnt, dress with a lathe just enough to remove defective area and polish with a strip of fine emery paper. Check insulation undercut depth and it must be 0.02" deep.