From what I can gather by googling the pump name this must be a gear-type, fixed displacement pump, correct? If so you must have a flow and directional control valve to do the variable speed drive and reversing functions? (If so this would be somewhat similar to a Case or Ingersol garden tractor.) Unfortunately I wasn't able to find out based solely on your descriptions the displacement of either the pump or motor and this is the most important piece of information required when sizing hydro drives. The Eaton 103- series motors does not show a -103 size; following their convention a -103 would be 103 cm^3/rev. They show -97 and -120 sizes but their max speeds are in the 400-600 range so I'm not sure what you have. Without knowing the pump and motor displacements and their respective pressure limits there is no way to tell what the complete effect will be of swapping components.
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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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