Description Set of 4 high quality long life Kevlar vanes. Babson Surge Alamo Vacuum Pumps Rebuild Instructions can be viewed and printed from the Manuals Tab above For Surge Alamo vacuum pumps used in dairy barns and milking systems. Also sold to Dentist office as Alamo 20 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 pump body is about 5 inches wide and the vanes measure 4 inches long. The Alamo 40 had a 2 hp motor mounted on a horizontal stand. See detail picture for actual pump assembly The Alamo 30 had a 1.75 motor mounted on a vertical stand. See detail picture for actual pump assembly 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 Made in USA by Ezee Milking Equipment 21985 Related Items for Alamo 30, 40, 550 - Some at links below; 7540R Major Rebuild kit includes bearing race, seals, shims and the vanes in this listing 7540 Minor Rebuild kit includes vanes, bearings, seals, shims and vanes in this listing. 7530 Vane set of 4 (this item) 7750-0014-834 Small Drain Flapper for Alamo 30 tank, SP11, SP22 vac