I bought a used air grease gun off eBay. And i know when you buy used tools off ebay you take your chances.When I got it I opened it up to see if it had grease . The plunger was all the way down so I got a new cartridge . When I went to put it in I found all the grease from the last cartridge was on the wrong side of the plunger . So after cleaning everything up it seams the plunger is to small for the cartridge or there is a piece missing or the cartridges come in different sizes. Does anyone know anything about these? It's a Sanborn .
Railguy