Hydraulic PTO pump P5151A231AAXK25-14, 3000 PSI, 22 GPM at 900 RPM / 55 GPM at 2100 RPM. SAE 4 bolt flange. 7/8 inch - 13 spline shaft. CCW rotation only (compatible with 221 PTO on M939 series truck). Cast iron housing. Doweled construction. Extended rear studs. 1-1/4 inch NPT side and 1-1/2 inch NPT rear ports.
To use with the 9553SF drive shaft kit use yoke 2-4-3331.