Looking for a Crane Jack for Omega Engine Crane, Omega 44981C Crane Jack is 8-Ton air actuated crank jack that features patented compact and powerful air turbo motor, US patent number: 6,012,377, to raise the load to the desired height efficiently. Machined and polished cylinders provide non-abrasive, leak-free, durable performance. The hydraulic system is protected from internal damage by a patented built-in bypass mechanism US patent number: 5,946,912. A wide, rugged base provides stability and strength. Fabricated from hard-cast steel with heat-treated critical stress areas. Specifications: Capacity: 8-Ton, Minimum Height: 24-1/8 in. Maximum height: 43-1/4 in. Base Size: 7-1/8 in. x 5 in., GW: 39 lbs.