Vickers Bulldozers like this one and Caterpillar D8s were used to build Wellington Airport in New Zealand. The Operators preferred the D8s though, as they had more torque, and were heavier and more reliable. The Vickers’ swinging final drive, which followed the ground better and therefore created extra traction, was an extra complication that needed extra maintenance. The tracks were linked using rubber bushes which wore quickly and were then inclined to throw off when turning at speed. The engine, a supercharged 6 cylinder diesel, was relatively high horsepower, but low torque and had high fuel consumption.
The Vickers were abandoned after the job, considered not worth the cost of refurbishing.

Thanks for posting. I would agree with others that Cat had a great range of dozers with good parts supply and backup. However Vickers did slowly improve becoming a bit more dozer than tank. The example shown here seems to be going very well, moves back and forth quickly. Hope you get many hours of fun out of it.

The Vickers Vigor chassis was used by Gerry Anderson for the Mole and other tracked rescue equipment in Thunderbirds.