Well, I seem to have run into a snag with my 110v Shurflo 2088-594-154 Diaphragm Pump. The pump stopped working the other day. I pulled it apart and all of a sudden it started working again. Put it back in the field, checked it again today and it stopped again. Pulled it apart and found the brushes for the motor were wore out already. I cleaned them up along with the armature and back up for a day or 2 probably. I guess these little pumps were not designed to run very long. Having a hard time finding brushes for it as well. Looks like you would have to replace the whole back of the motor too. Anyone else have any problems with these pumps?