With shop air as the energy sources, these pumps have the power and oil capacity (80 cu. in. usable oil) to drive even the large 55-ton rams. They are ideal all-around power sources for dozens of body, frame, and alignment applications. They can be used with a variety of rams, presses, and hydraulic pullers operating at up to 100,000 PSI. An internal relief valve protects the hydraulic components regardless of hydraulic pressure. In addition, a two-stage release mechanism gives fast or metered ram return while reducing hydraulic shock. In addition to all the features and performance characteristics of the 4020/4025, the 4021 is equipped with a 2-gal reservoir. These pumps require 9 cfm at 100 PSI air pressure at the pump. Ideal all-around power sources for dozens of body, frame, and alignment applications. Can be used with a variety of rams, presses, and hydraulic pullers operating at up to 10,000 PSI at 100 PSI air. An 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. 2-gallon plastic reservoir with 442 cu. inches of usable oil. 3/8" NPTF oil port. No. 4022 Air/hydraulic pump with a 2-gallon (442 cu. in.) plastic reservoir. Wt., 26 lbs., 3 oz.
