Harken offers 1-, 2-, and 3-speed pumps for hydraulic systems. Our 2- and 3-speed pumps deliver oil faster and more efficiently than other pumps on the market. When a preset point is reached, the pump automatically shifts to the next speed. The 1-speed pump is a simpler alternative, but features the same high-quality components as the other systems. Use 1- and 2-speed pumps for smaller and midsize hydraulic systems; 3-speed pumps on systems with high-volume, high-pressure requirements. Pressure relief on 1- and 2-speed pumps is factory-set to a maximum of 5000 psi. Mounting patterns for all pumps are identical, making upgrades easy.