Thanks for the replies, but I think I solved my own problem. The problem with the brushes was that as they wore, the brush lead in the holder eventually prevented contact with the commutator. Although our hardware store had a good selection of electric motor brushes they all had the lead coming out the end instead of the side. Almost by accident I found that a friend was putting brushes in his alternator and that the leads were on the side. The were larger in all dimensions than what I needed but a few minutes with some fairly fine emery paper solved that. They are quite soft.
Clean the commutator and grease the shaft and now it works great.
Part that I used NAPA E601SB There well may be others. Hope this helps someone out there