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Posted by dave on Monday, November 09, 2009:

In Reply to: JD 500a Radial hydralic pump posted by Jon on Saturday, November 07, 2009:

most radial pumps use a swah plate to "stroke" the pump. stroke means to change the displacement of the pump. the pump can make high pressure for power or high flow for speed. im not sure how it is controlles on a 500a. is this a tractor ?




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