... Seat Puller” is a service tool, consisting of hydraulic pump assy., pressure gauge, puller head, hose coupling assy., stem, jack, wing nut ... fluid end module. During the process of replacing the valves seat and maintaining the mud pumps, this tool will be more ... -PT, NATIONAL 7P50, 8P80,9P100,10P130, 12P160. This hydraulic valve seat puller was developed for two reasons: A. To eliminate damage ...