4043TR Recirculating Impact Crusher - Portable Recirculating .Learn more about our 4043TR impact crushing plant here! . overs conveyor feeds directly back into the hopper, or can be positioned to the side for stockpiling.side impact crusher,Secondary Impact Crusher - McLanahanas an added safety reminder. The NGS Secondary Impact Crusher is available in a wide range . Large access doors on side, back, and top of crusher for quick.