Hydraulic Pump, 9 Spline (Rear Mounted - Factory Option) Mounts just above PTO Shaft 

NOTE: Used on most FIAT made Oliver, White, Allis Chalmers, Minneapolis Moline applications with a loader. 

NOTE: OEM Pump has been discontinued  // Search this number on eBay ( GP-F20-08-S9-C ). It may require different fittings for various applications and slight modification  //  I have NO other information than what I have listed.

FYI - My 82 Year Old Father was able to install this pump on his 2-50 and works Great ! 

Inlet Port Diameter: SAE -12, 1 1/16-12, O-ring Boss

Outlet Port Diameter: SAE -10, 7/8-14, O-ring Boss

rpls/references: 673158AS, 71386141