Allen Engineering

By Heather Burlingame, Senior Production Editor | September 28, 2010

HD550 Riding TrowelThanks to all-hydraulic power steering and drive, the HD550 Riding Trowel requires no manual levers, clutches or mechanical gearboxes. A stretched frame with 18 inches of spacing between the pans helps to achieve higher F#s by reducing ridging on the first pass. Features include a 12-foot-wide frame, a turbocharged engine with 87 horsepower, powered-pitch control, and a 5-foot-diameter, 5-bladed rotor.