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Message: <blockquote data-quote="jerry" data-source="post: 54745" data-attributes="member: 931"><p>Make sure your aux hyd is not being engaged at all too, bobcats do funny things if the aux hyd are active. If I remember right there is a relief valve and spring in the rear on the port block. When I redid the pumps on the 632 I replaced the spring and it did bring the charge pressure up some. The new spring was just slightly longer , would guess the old one had lost length due to time.</p></blockquote><p></p>