Find repair parts for your Craftsman - 919.167800 at MasterToolRepair.com.
Part Number: B5900
Replacement B5900 pump - Includes flywheel, aftercooler and air filter. This pump comes with an aftercooler (see picture). Aftercooler MUST be used. If your pump does NOT include and aftercooler, you will have to find a new supply tube from your pump to the tank.