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Message: <blockquote data-quote="bradleyj" data-source="post: 64214" data-attributes="member: 3829"><p>I removed and disassembled the relief valve. O-rings were fine and the valve was clean as a whistle, so I bit the bullet and bought a new gear pump. I removed the old one and took it apart before installing the new one and all the internals looked fine. No substantial wear. I went ahead and installed the new pump anyway, and it made no difference at all. The boom/tilt/aux circuit is still very slow and jerkey and can't produce much force. I only see about 1000 psi when I put a gauge on the aux coupling. I'm really scratching my head now. What else could it be? Clogged suction line to the gear pump?</p></blockquote><p></p>