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Allen Engineering SP425
October 30, 2007

The converter clutch system on Allen Engineering’s SP425 series trowel provides torque for floating with pans and finishing. Standard features include power or manual steering, the choice of a 34-horsepower liquid-cooled gasoline or turbo diesel Vanguard engine and two 46-inch diameter, 5-blade non-overlapping rotors with speeds of up to 165 rpm. Other features include heavy-duty gearboxes, a driveline with an electric-powered spray system for retardant application, a flip-up seat and removable screens for engine, clutch and drive-line accessibility.