The Galaxy R-4 Regenerative Air Sweeper features a 3024CT Caterpillar 61-hp diesel auxiliary engine and 4.65-cu.-yd. hopper. No CDL is required for the 17,950-lb. GVWR. The Galaxy R-4 has up to 122-in. sweeping path, stainless steel hopper, 30-in./10-blade impeller, 12-in. suction/pressure pickup tubes, and is available with 12-Volt backup hydraulics.