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Bobcat Skidsteer Forums
General Bobcat Skidsteer Forum
753 pump *hums*
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<blockquote data-quote="Tazza" data-source="post: 17914" data-attributes="member: 82"><p>It still hums!!!!</p><p>I replaced the valve but the problem is still there, its not as loud, at idle it makes no noise. I'm not really sure what to check next. It did have water contamination when i got it, the oil was slightly milky. I changed oil and the filter, I'm not really happy with it now, it needs another change as it still has a slight white tint to it. I didn't want to fill the system again if i have to dump it again if i need to pull say the pump out.</p><p>Does anyone know the noise a gear pump makes when it wears out? I don't think its worn as it has heaps of power and lifts fast. I thought they run quiet still but have lower flow and can't build up pressure. The drive pumps/motors work great heaps of power.</p><p>I'm starting to think oil may be part of the problem, I'm using 20W50 in it. The noise is the same hot or cold. I don't want to start the oil debate again! just not sure if its a little thick causing it to make the valve make the noise. It does get a bit warm in Brisbane though so the oil will thin out pretty fast.</p><p>Its one of those things you don't want to fiddle with too much just incase you make it worse. I swear it sounds like the pump is caveating but there are no bubbles in the oil tank. The pump heats up like it is but again, no bubbles!</p></blockquote><p></p>
[QUOTE="Tazza, post: 17914, member: 82"] It still hums!!!! I replaced the valve but the problem is still there, its not as loud, at idle it makes no noise. I'm not really sure what to check next. It did have water contamination when i got it, the oil was slightly milky. I changed oil and the filter, I'm not really happy with it now, it needs another change as it still has a slight white tint to it. I didn't want to fill the system again if i have to dump it again if i need to pull say the pump out. Does anyone know the noise a gear pump makes when it wears out? I don't think its worn as it has heaps of power and lifts fast. I thought they run quiet still but have lower flow and can't build up pressure. The drive pumps/motors work great heaps of power. I'm starting to think oil may be part of the problem, I'm using 20W50 in it. The noise is the same hot or cold. I don't want to start the oil debate again! just not sure if its a little thick causing it to make the valve make the noise. It does get a bit warm in Brisbane though so the oil will thin out pretty fast. Its one of those things you don't want to fiddle with too much just incase you make it worse. I swear it sounds like the pump is caveating but there are no bubbles in the oil tank. The pump heats up like it is but again, no bubbles! [/QUOTE]
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753 pump *hums*
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