The EP-100WD is a 100 Ton double-acting hydraulic compression press for full tension|transmission and substation connections and requires an external 10,000 psi|double-acting pumping source. The EP-100WD is even lighter than our previous model|the EP-100WC|by a full 18 pounds. The EP-100WD will accept shell-type dies currently used with Alcoa 100 ton compression heads. This double acting compression head is designed to operate from Huskie Tools pump models R-14EAD|HPG-4 or any 3/4 HP high-pressure|double-acting pump with the proper oil capacity. Double acting means hydraulically advancing the ram to build proper tonnage|then the hydraulic pressure is reversed to retract the ram. This will eliminate all possibilities of the connector hanging up or the tool jamming.