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Bobcat Skidsteer Forums
General Bobcat Skidsteer Forum
753 pump *hums*
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<blockquote data-quote="skidsteer.ca" data-source="post: 17931" data-attributes="member: 307"><p>Tazza</p><p> Its not your oil 10/30 here in the winter would be thicker then 80/90 in Brizzy anytime of the year. I have never noticed any odd werring noises in the winter. (though I usually park indoors)</p><p>There is not a second valve in that area or the new one could be bad??? How is your charge presure, steady??</p><p>When a gear pump is shot you can see a huge difference in max (relief valve) pressures from cold oil to warm oil at low engine rpm. They often wear quite slow and will work ok if the loader is reved up, but at an idle the load in the bucket may push the boom down when you press the pedal to lift. (oil flows backwards through the pump) seen this on a 7710 ford tractor.</p><p>Ken</p></blockquote><p></p>
[QUOTE="skidsteer.ca, post: 17931, member: 307"] Tazza Its not your oil 10/30 here in the winter would be thicker then 80/90 in Brizzy anytime of the year. I have never noticed any odd werring noises in the winter. (though I usually park indoors) There is not a second valve in that area or the new one could be bad??? How is your charge presure, steady?? When a gear pump is shot you can see a huge difference in max (relief valve) pressures from cold oil to warm oil at low engine rpm. They often wear quite slow and will work ok if the loader is reved up, but at an idle the load in the bucket may push the boom down when you press the pedal to lift. (oil flows backwards through the pump) seen this on a 7710 ford tractor. Ken [/QUOTE]
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