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Message: <blockquote data-quote="Tazza" data-source="post: 10952" data-attributes="member: 82">Theoretically it could *if* the poppet or spring were stuck it could allow oil to be by-passing giving you little or no pressure. Small adjustments of the relief pressure will do nothing to cause problems like this. All it will do is increase or decrease your main hydraulic pressure by a small amount, it would not normally cause you to loose essentially all hydraulic pressure to your hydraulics.Did you find out if some how your aux hydraulics were coming on at all? You were looking at installing a pressure gauge, did you ever get to doing it?As you have been tinkering with your main relief valve, you may want to remove it to check there isn't a part of an old o-ring stuck under the poppet. A relief valve problem would explain slow/weak hydraulics.</blockquote>