The Allen HDX 600 is a totally new Hydraulic-Powered Riding Trowel. Designed to provide the power and torque demanded for panning by today's concrete finishers, this double four foot diameter rider packs a powerful punch in a compact package. The weight to horsepower ratio and hydraulic components (including a patent pending devise) makes the HDX 600 a "Stand-Out" among all hydraulic riders. The HDX 600 is the first in the new series of Allen Hydra-Drive Extreme (HDX) All Hydraulic Riders. Features include all hydraulic drive and steering; 44-horsepower liquid-cooled Kubota Turbo Diesel; two 46-inch diameter, five-blade non-overlapping rotors; rotor speeds up to 135 rpm; electric- powered spray system for application of retardant; and flip-up seat and removable screens for superior accessibility to engine, clutch and drive-line.