Ná jidere bọket yiri ụfọdụ nke aka. E tinyela isi mkpịsị aka siri ike na bọket ahụ, na mkpịsị aka ukwu hydraulic na-etinye n'azụ bọket ahụ, nke na-enyere gị aka idozi nsogbu ịgbado ọkụ. Ka ọ dị ugbu a, a na-echebe hydraulic hydraulic nke ọma site na njikọta njikọ ahụ, nsogbu nke hydraulic cydraulic na iji ya agaghị achọta gị.