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General Bobcat Skidsteer Forum
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<blockquote data-quote="Mitch500" data-source="post: 133098" data-attributes="member: 24521"><p>Ok got everything back together last night. Today I fired it up and noticed the hydraulic pump was slightly whining wrrrrrerrrrrrr sound. Nothing loud or alarming. Machine moved forward and back boom lifted up and down fine and bucket tilted.</p><p></p><p>But still a slight audible wrrrrrrrr-ing sound. I did notice in the hydraulic reservoir the oil was quite bubbly lots of micro bubbles. I check all the large suction lines and noticed the ones on the back of the pump were kinda loose, they took a good couple revolutions to tighten. So I did all of those. Maybe air was intruding there.</p><p></p><p>Im going to let the machine sit and let the bubbles rise out and see if the sounds gone. </p><p></p><p>But I'm wondering if it normal for the first bit for the hydraulic oil to bubble up after hydraulic filter change. I also drained the case and cleaned case filters as well as replaced the o-rings on the high-pressure lines at the left drive motor.</p><p></p><p>I've only had it running for a few mins, thought I'd consult you guys before doing anything wrong.</p><p></p><p>Also I did change the steering spool and sleeve o-rings. So far there was no leaks from there. I'd assume the pump wouldn't create vacuum and suck air from those. They seem like they would leak oil from pressure if they were not sealing.</p><p></p><p>Here's pic of oil in hydraulic tank:</p><p></p><p>[ATTACH=full]5718[/ATTACH]</p></blockquote><p></p>
[QUOTE="Mitch500, post: 133098, member: 24521"] Ok got everything back together last night. Today I fired it up and noticed the hydraulic pump was slightly whining wrrrrrerrrrrrr sound. Nothing loud or alarming. Machine moved forward and back boom lifted up and down fine and bucket tilted. But still a slight audible wrrrrrrrr-ing sound. I did notice in the hydraulic reservoir the oil was quite bubbly lots of micro bubbles. I check all the large suction lines and noticed the ones on the back of the pump were kinda loose, they took a good couple revolutions to tighten. So I did all of those. Maybe air was intruding there. Im going to let the machine sit and let the bubbles rise out and see if the sounds gone. But I'm wondering if it normal for the first bit for the hydraulic oil to bubble up after hydraulic filter change. I also drained the case and cleaned case filters as well as replaced the o-rings on the high-pressure lines at the left drive motor. I've only had it running for a few mins, thought I'd consult you guys before doing anything wrong. Also I did change the steering spool and sleeve o-rings. So far there was no leaks from there. I'd assume the pump wouldn't create vacuum and suck air from those. They seem like they would leak oil from pressure if they were not sealing. Here's pic of oil in hydraulic tank: [ATTACH type="full"]5718[/ATTACH] [/QUOTE]
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