If you can get 185 that is all a 656 needs. As far as the nut. The early models didn't have the lock nut. You were supposed to put Loctite on the threads. I always put an allen screw to lock threads. When they went to a lock nut and higher pressure pto they changed the spool valve, large nut with seal in and went to a thin spacer. I changed a lot of them on the larger tractors but never worried about the 656 that did not have it . One reason is the new nut with seal does not support the spool as well as old style did as seal was way down inside. If you were having slippage the disc's are most likely toast already.
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Today's Featured Article - Box Plow Blues - by Tom Schwarz. One of the first implements most tractor owners obtain is the box plow. For very little money, this piece of equipment promises to plow and flatten any hill or vale on your ranch road or farm. At least that's what I thought! As simple as a box plow appears, it can be rather challenging to make work correctly. In our sandy soils of Florida, traction is king. You can never have wide enough tires or heavy enough weights to get all the traction you want … unless you own a monster tractor. U
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