Here is the tractor with the engine and gearbox out , it is amazing what you find in the bottom of the U frame in the thick gear oil. The nut must of come loose on the oil thrower gear reataining shaft and let the gear come off and then got chewed up into lots of pieces with the bull gears. It was a great feeling to go get one of the parts shelf which had been sitting there since around 1982 when I bought the remains of a styled 25 from a local scrapyard.

Also a photograph of the excellent manifold and elbow on this tractor.