You can install them without splitting the tractor IF you can get the oil pan off. On your Oliver 70 I am not sure you can get the oil pan off in the tractor with the cast frame/pan the engine sets in. IF you can then you remove the back main bearing cap. You then pick out the old top seal. Then there is a tool that looks like steel Chinese hand cuffs that will pull the new rope into the top side of the crankshaft. It works better if you loosen all the main bearing caps to allow the crankshaft to settle down some to give you more room. Then trim it to just a little longer than the housing on both the top and cap and re-torque the main caps.
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Today's Featured Article - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let’s make one more addition to our series on hydraulics. I’ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
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