H&L Back-up Rippers are mounted to the back of the bulldozer blade and are designed to rip while the dozer is backing. Production is increased since the equipment is working full time in both directions. Tight material, such as hardpan, D.G. and rock is broken up making production easier with less wear and tear to the machine. Rippers operate independently! As the tractor moves forward, the ripper shanks drag freely behind the dozer blade and when the tractor moves rearward, each shank will fall into the ripping position. When shanks needs to be inoperative, simply raise the shank assembly and insert a pin or bolt in the bracket as shown in the drawing detail.