Turns out it's got a lister SR1 engine. I removed the head and gave it a de-Coke, ground in the valves. Bump clearances were wrong. It was on a 20 " piston with no bore wear!!! Runsweet now and starts very easy even in the winter. Replaced the steering box with a Land Rover series three, overhauled the rod / drum brakes and replacecd an oil seal on one of the half shafts. Tin work was shot blasted and repainted. Bit more to do-but these old dumpers are great projects.
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