Electro-Hydraulic Clamshell Buckets Application: Hawco electro-hydraulic clams can be designed to handle the complete range of bulk commodities typically handled by stevedores. Advantages of the electro-hydraulic clam are that it can be easily hooked up to a single hook type crane and because it is hydraulic, it can be designed with enough closing force to handle any bulk commodity effectively. Sizes: 1 to 30 cubic yards Standard Features: Easily maintained uni-directional hydraulic system.Commonly used, readily available hydraulic components. All alloy steel construction Pins and bushings made of heat treated 4140 and 4150 alloy stock All pins and bushings are lubricated through recessed grease fittings Lip material is T-1 alloy. Scoop reinforcing bars on bowls for prolonged life. Double rib support on bowl arms for additional strength. Options: 400 BHN hardened alloy steel lips Environmental "lap" type lip seal Environmental rubber lip seal Spill plates to increase capacity Spillways to decrease capacity Environmental dust covers