Borrowed from DanB from forums:

Based on my experience, I would recommend that the wheel motor brushes be replaced as part of an annual maintenance program, thereby hopefully putting in new ones before the old ones get so worn as to initiate arcing and damage to the commutators. It is very easy and inexpensive to do.

maint/3500.txt · Last modified: 2013/10/18 00:13 (external edit)
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