"We think it's the safest and easiest dual changer ever built," says Lorne Cooley, farmer and manufacturer of the new "Dual-Matic" dual wheel changer that uses a lift arm powered by a hydraulic hand jack to mount and dismount dual tractor wheels.

The swing-away lift arm is mounted on a pedestal that consists of two brace arms and a drive-on stand. Any 3-ton hydraulic hand jack can be inserted under the lift arm. A pair of scissoring tongs, each side fitted with a pair of bearings mounted at right angles to each other, lift the wheel to swing it over to tractor. Bearings on tongs allow full wheel rotation to line up bolt holes.

The wheel changer breaks down for out-of-the-way storage.