I bought the tractor off of and old man and bought it as scrap/basketcase for a challenging project. I have just completely restored the tractor and all of the dogs, toggels, and pins are new as is the driver disc. The clutch springs and discs are also new. After rebuilding the engine which had not run for close to 20 years, I put the clutch back together and started the tractor and I haven't had the clutch working yet. I think I'm going to try putting on the original first rear reduction cover and see what happens after that. The reason for putting the early 620 cover on was that the original one was cracked in two spots possibly from ice damage or improper installation. In the parts catalog there is no serial break for the different covers, just one cover has a plug underneath the crankshaft, which is the one belonging to the late 620.
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Today's Featured Article - Tractor Hydraulics - The Basics - by Curtis Von Fange. Hydraulics was one of the greatest inventions for helping man compound the work he can do. It’s amazing how a little floor jack can lift tons and tons of weight with just the flick of a handle. What’s even more amazing is that all the principals of hydraulic theory can be wrapped up in such a small package. This same package applies to any hydraulic system from the largest bulldozer to the oldest and smallest tractor. This short series will take a look at the basic layout of a simple hydraul
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