Jim,
Are you talking about the brush that rubs on the inside of the wheel? You could try and replace the brass brushes, but it might be difficult to get parts.
There are also pick ups in the tender, but they tend to act more like brakes. Some folks have replaced the tender wheels with LGB ball bearing wheels and used the leads on those wheels to improve power pick up.
Mark
Are you talking about the brush that rubs on the inside of the wheel? You could try and replace the brass brushes, but it might be difficult to get parts.
There are also pick ups in the tender, but they tend to act more like brakes. Some folks have replaced the tender wheels with LGB ball bearing wheels and used the leads on those wheels to improve power pick up.
Mark