A complete pony engine overhaul kit is available from H & J Machining in ND for about $1700. Add in the labor and you are well over $2000 to do it right. So, a good running pony engine is worth about $1200 in our area. There are two types of four cylinder pony engines. The ones used in JD 70s and Early JD 720s, and improved pony engines used in late 720s and 730s. The improved ones have a brass serial tag on the engine block. The used pony engines that are available came from tractors converted to electric start and have a high probability of having had problemsthus their removal/replacement.
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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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