4th gear is the next set to rear of the constant mesh gear and transmission input shaft gear. You can see through the belt pulley gear box drive hole if the top and bottom gear are in mesh when in 4th. If you can see those gears are in mesh and the top transmission shaft doesn't turn the problem has to be with the counter shaft inside the constant mesh gear or just inside the 3rd and 4th drive gear.
Also unless you have a PTO failure and it stops turning when engaged, it would be a failure of the lower transmission shaft to transfer power to it if the constant mesh gear is turning or even if its turning the front of the lower shaft.
This post was edited by D Slater at 05:37:21 09/11/14.
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Today's Featured Article - A Brief History of Tractors in Australia - by Bob Kavanagh. After Captain Cook's exploration of the east coast in 1770 the British Government decided to establish a penal colony in Australia. The first fleet arrived in 1788 and consisted mainly of convicts who were poorly equipped and new little of farming techniques. The colony remained far from self-supporting and it was not until the early 1800's that things started to improve. Free settlers started to arrive, they followed the explorers across the mountains and where land was suitable set up farms. T
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