Two ways to replace brushes is to either get a general purpose kit (very hard to find since HF stopped carrying them) and very slowly grind to size. As long as the Commutator curvature and power wires are ok, then this should work. This is not a full fix. If you really like this unit and you have a motor repair shop (hard to come by in many areas) let them do this and resurface the Commutator , new bearings and check for week insulation, this should get you another 30 years+. Anything can be fixed, it is just a matter of the cost of a new unit and how much the fix is.
Good Luck to you - Baker
Last edited by rwbaker; 04-23-2014 at 06:37 AM.