... by orbit hydraulic motor, discbrake, reducer and so on . with screw joint steel structure frame ,shuttle valve ,balance valve and ... pulling equipment of vessel ,wharf and car . Attention1.Hoisting with clockwise rotation of the drum or counter clockwise if required ... reasons .2. Negative multi-disc brake , with 58 daN.m of static torque .3. internal lubrication with grease .4.Maximum back pressure on ...