Disclosed herein is an improved hydraulic torque wrench pump (HTWP) which utilizes a combined filtration system and cooling system for filtering and cooling substantially all the oil returned to the pump including from a hydraulic torque wrench. The hydraulic torque wrench pump includes an electric motor and one or more pumping elements arranged in a protective frame. The electric motor used in association with the hydraulic pump has a high-efficiency design that includes a high power to height ratio and yields efficiency in a range of 90% to 95%. A sealed oil tank is used for storing the oil. The sealed oil tank helps in restricting one or more impurities from entering and contaminating the oil.