For Surge Alamo vacuum pumps used in dairy barns and milking systems. This is a common pump sold from the 1950s to 1999. These were primarily installed with bucket systems or very small 2 cow pipeline systems. The Alamo 40 had a 2 hp motor mounted on a horizontal stand. The Alamo 30 had a 1.75 motor mounted on a vertical stand. The pump body is about 5 inches wide and the vanes measure 4 inches long. Double check model prior to ordering. Rebuild kits only fit the Alamo 40 (550). Vanes fit both models. Major rebuild kit includes 4 high quality long life Kevlar vanes, 1 double row bearing, 1 needle bearing and race, 1 shaft seal, shims and 2 o-rings for later model end plates. Minor rebuild kit includes 4 high quality long life Kevlar vanes, 1 double row bearing, 1 needle bearing, 1 shaft seal, shims and 2 o-rings for later model end plates. (this kit does not have the race) Set of vanes available separately above. Replacement oiler system available for Model 40. The model 30 pumps had a single oiler and sealed bearings. Rubber exhaust flapper available above. Support for exhaust flapper at link below. Replacement pump pulley available at link below. Complete rebuilt assembly available. See link above. please call to order complete assembly as this must ship on a pallet and shipping varies based on your zip code. Free shipping does not apply to complete pump assembly or vacuum pump head. Pickup is available in Missouri or Pennsylvannia depending on stock availability. please call 40+ (550) Alamo Vacuum pump specs (2.4 HP) - 20 CFM - 1025 RPM - 10 inch pump pulley - 5.5 inch Motor pulley - 2.4 hp motor Items starting with 7750 are OEM GEA/WestfaliaSurge. Other parts are not made or sold by GEA®. They are quality aftermarket parts sold satisfaction guaranteed.