The Acremaster 422A is a four-wheel drive (4WD) tractor from the 400 Series, built in 1984 by Acremaster in Merredin, Australia. It features a powerful Mercedes-Benz OM422A 14.6L turbocharged V8 diesel engine producing 240 hp (179.0 kW) at 2100 RPM. The tractor has a 9-speed gear transmission with 3 reverse gears, articulated power steering, and a standard cab with air-conditioning. It rides on 23.1x30 tires front and rear, and weighs 21164 lbs (9599 kg).