The Acremaster 403 is a four-wheel drive (4WD) tractor produced from 1978 to 1984 as part of the 400 Series. Built in Merredin, Australia, it features a powerful Mercedes-Benz 16.0L 10-cylinder diesel engine delivering 308 hp (229.7 kW). The tractor offers transmission options including a 9-speed gear and a 12-speed power shift. It has articulated power steering and a standard cab with air-conditioning. The tractor rides on 23.1x30 tires front and rear and weighs 21605 lbs (9800 kg).