I have a situation where I need to operate PTO powered equipment that is detached from the back of the tractor. A very flexible work-a-round would be to have a PTO driven pump, a reservoir, two 20' hydraulic hoses, and a hydraulic motor with PTO spline.
It would have to be universal. For instance, a stationary PTO driven generator, sawmill, and ultimately, to power front mounted PTO equipment without a front PTO. My prime target is a three point snowblower that would be mounted on the front; either with a fabricated front three point or on the loader. For only a single purpose, it would be costly. But for a remote PTO, with proper reactionary framework, it could be quite useful. A secondary purpose would be a portable hydraulic supply. Well, as portable as the SCUT. With a set of quick couplers, any hydraulic equipment could be powered by the pump and reservoir portion. A log splitter or processor with its own control valves would only require the connection of the two quick connectors. ... You could run a back hoe on a tractor with either no hydraulics or with hydraulics with to small a volume.
The use of hydraulics allows flexibility for end purposes, but with an accompanying loss of power for the pump and motor efficiencies that can combine from as little as 20% to over 40%. That power loss is due to the loss of fluid under pressure through the clearances between individual parts that are necessary to allow them to move in relation to each other and to supply lubrication to those same parts.
The power loss manifests itself as heat generation, even under no load conditions, and increases in lock step with an increase in load. It also manifests as noise from almost silent under no load to a quite load whine when under high load. I worked in maintenance in a steel mill where even 3 or 4 10 hp pumps would generate enough heat to warm a 12'x20' concrete room to 100+į, and which was also a hearing protection zone.
For some of your stated
applications, a drive shaft would be simpler and less costly. For others, my concern was for efficiency. A piston pump (90%) is more efficient than a gear pump (75-80%) and variable displacement allows adjustment to flow rates independent of throttle position for some of the other stated
Your idea is good. I have a small auxiliary system on my GT for the loader and log splitter. But it can get to be quite expensive in both cost and efficiency if care isn't used for the selection of components that can handle all of the appliances that you mentioned.
BTW, you can drive a 3PH snow blower on the front of the tractor with the rear PTO. You just need a reverser to change the direction of the drive shaft rotation.
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