Allis Chalmers HD3

The Allis Chalmers HD3 is a tractor designed with a 4-cylinder, 175 cubic inch displacement, liquid-cooled diesel engine. It operates at a rated 1650 RPM and features a two-speed power shift transmission with 8 forward and 2 reverse gears alongside a mechanical shuttle. The distinct steering mechanism uses mechanical clutches. The tractor's length measures at 108.75 inches, with an exhaust height reaching 71.7 inches. Known for its straightforward design, the HD3 has a cooling capacity of 9 quarts and an electrical starter system. The model bears the Allis Chalmers brand both for its manufacture and engine, ensuring a unique consistency in design and quality. The body width varies as multiple values are reported (7, 10, 12, 14, 18 inches) without clear indication of where these measurements apply, and there are no details provided about the hitch system, PTO, brakes, or operator station.