The Direct Mount Hydraulic Dump Pump with Air Control from Buyers Products directly mounts to your PTO for a compact and efficient source of hydraulic power. It is designed for dump operations with 2 or 3 line plumbing and features pneumatic shifting. Based on RPM, its output ranges from 13 to 46 GPM. It includes a relief valve set at 2500 PSI. The pump includes a 4 bolt SAE B mounting flange and 7/8 in. by 13 spline shaft. Air shift cylinder is included. You will need to specify the pump rotation when ordering, which you can determine by looking at the pump with the shaft facing you and the belly of the pump facing down. Note: Buyers Products PTOs can be custom-ordered for your specific vehicle and application. Contact Customer Service for assistance in selecting the correct PTO.