15T industrial grade integral type hydraulic puller extractor gear bearing puller wheel pulling 44799142Operation principle Hydraulic pressure draw horse fill with post in pump as power source to drive horse s cylinder rod to move ahead Hook claw flat can follow the fast regulate nut make the distance of adjusting go Backwards to advance directly. Lift hand handle swing from head to foot while operating. namely output high pressure oil make the draw horse s cylinder rod move forward. Hook claw corresponding to go backwards, the objected is pulled out.