Pump operates on shop air (40-100 PSI/ 9 scfm con-sumption), driving a variety of sgl. acting rams, presses, and hydraulic pullers operating at up to 10,000 PSI. Internal relief valve protects the hydraulic components regardless of hydraulic pressure. Two-stage release mechanism gives fast or metered ram return while reducing hydraulic shock. Pump, hold or release load with foot lever control. Reservoir capacity is 105 cu. in. (98 cu. in. usable).