<html><head></head><body><div class="ydp5e8afd33yahoo-style-wrap" style="font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:16px;"><div></div>
<div>James, </div><div>Further thoughts.... Rick could be on to something with the bad connection on the positive. If it were giving intermitant power to the motor it could cause it to run rough & maybe the vibration from that is causing wear on the brushes and turning the oil black. </div><div>I would check that it is not something in the motor controller. Maybe run it straight from a battery & see if it sounds better. </div><div>The other thought was that I had heard of people adjusting the brush springs to give more pressure to avoid them lifting off their contacts due to the centrifical force of the oil lifting them. (as Emile mentioned) </div><div>Possibly the simplest thing to do is drain the oil again and run (for a short time) & see if the noise goes. If it does maybe a lower viscosity oil will help. </div><div>Good luck, </div><div>Alan</div><div><br></div>
<div id="ydp5e8afd33yahoo_quoted_7661813053" class="ydp5e8afd33yahoo_quoted">
<div style="font-family:'Helvetica Neue', Helvetica, Arial, sans-serif;font-size:13px;color:#26282a;">
<div>
On Wednesday, July 21, 2021, 05:25:02 AM GMT+12, Rick Patton via Personal_Submersibles <personal_submersibles@psubs.org> wrote:
</div>
<div><br></div>
<div><br></div>
<div><div id="ydp5e8afd33yiv2273901529"><div><div dir="ltr">James, you mentioned that one of the two wires is getting hotter than normal and the first thing that came to mind was that it didn't have a solid connection somewhere? That may not explain the abnormal noise you said it is making but a bad connection will heat up a wire.<div>Rick</div></div><br clear="none"><div class="ydp5e8afd33yiv2273901529gmail_quote"><div class="ydp5e8afd33yiv2273901529yqt0285511687" id="ydp5e8afd33yiv2273901529yqtfd23465"><div class="ydp5e8afd33yiv2273901529gmail_attr" dir="ltr">On Mon, Jul 19, 2021 at 11:37 PM James Frankland via Personal_Submersibles <<a shape="rect" href="mailto:personal_submersibles@psubs.org" rel="nofollow" target="_blank">personal_submersibles@psubs.org</a>> wrote:<br clear="none"></div><blockquote class="ydp5e8afd33yiv2273901529gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex;"><div dir="ltr">Thanks Emile. <div><br clear="none"></div><div>This motor is definitly not right compared to the other two. Im going to try Cliffs idea of adjusting the alignment. Seems to be the only thing i can try, other than a new motor or air comp.</div><div><br clear="none"></div><div>regards</div><div>James</div><div><br clear="none"></div></div><br clear="none"><div class="ydp5e8afd33yiv2273901529gmail_quote"><div class="ydp5e8afd33yiv2273901529gmail_attr" dir="ltr">On Tue, 20 Jul 2021 at 08:44, via Personal_Submersibles <<a shape="rect" href="mailto:personal_submersibles@psubs.org" rel="nofollow" target="_blank">personal_submersibles@psubs.org</a>> wrote:<br clear="none"></div><blockquote class="ydp5e8afd33yiv2273901529gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex;"><div lang="NL"><div><p class="ydp5e8afd33yiv2273901529MsoNormal"><span>All,<u></u><u></u></span></p><p class="ydp5e8afd33yiv2273901529MsoNormal"><span><u></u> <u></u></span></p><p class="ydp5e8afd33yiv2273901529MsoNormal"><span lang="EN-GB">It is normal that a brushed oil filled motor runs not well in air. The brushes will float on the oil due to the higher RPM.<u></u><u></u></span></p><p class="ydp5e8afd33yiv2273901529MsoNormal"><span lang="EN-GB"><u></u> <u></u></span></p><p class="ydp5e8afd33yiv2273901529MsoNormal"><span lang="EN-GB">Emile<u></u><u></u></span></p><p class="ydp5e8afd33yiv2273901529MsoNormal"><span lang="EN-GB"><u></u> <u></u></span></p><div style="border-right:none;border-bottom:none;border-left:none;border-top:1pt solid rgb(225,225,225);padding:3pt 0cm 0cm;"><p class="ydp5e8afd33yiv2273901529MsoNormal"><b>Van:</b> Personal_Submersibles <<a shape="rect" href="mailto:personal_submersibles-bounces@psubs.org" rel="nofollow" target="_blank">personal_submersibles-bounces@psubs.org</a>> <b>Namens </b>James Frankland via Personal_Submersibles<br clear="none"><b>Verzonden:</b> maandag 19 juli 2021 13:22<br clear="none"><b>Aan:</b> Personal Submersibles General Discussion <<a shape="rect" href="mailto:personal_submersibles@psubs.org" rel="nofollow" target="_blank">personal_submersibles@psubs.org</a>><br clear="none"><b>Onderwerp:</b> [PSUBS-MAILIST] Motor Issue<u></u><u></u></p></div><p class="ydp5e8afd33yiv2273901529MsoNormal"><u></u> <u></u></p><div><p class="ydp5e8afd33yiv2273901529MsoNormal">Hi All<u></u><u></u></p><div><p class="ydp5e8afd33yiv2273901529MsoNormal"><u></u> <u></u></p></div><div><p class="ydp5e8afd33yiv2273901529MsoNormal">Does anyone have any ideas on this?<u></u><u></u></p></div><div><p class="ydp5e8afd33yiv2273901529MsoNormal"><u></u> <u></u></p></div><div><p class="ydp5e8afd33yiv2273901529MsoNormal">Following the dive i did last week, i had a motor issue. The motor did not actually stop or fail, but during the dives it just didnt feel right.<u></u><u></u></p></div><div><p class="ydp5e8afd33yiv2273901529MsoNormal"><u></u> <u></u></p></div><div><p class="ydp5e8afd33yiv2273901529MsoNormal">The positive wire going into the rotating penetrator would get hot after about 10 seconds of motor power. I could also hear a kind of electrical noise from within somewhere.<u></u><u></u></p></div><div><p class="ydp5e8afd33yiv2273901529MsoNormal"><u></u> <u></u></p></div><div><p class="ydp5e8afd33yiv2273901529MsoNormal">So, the next day i took the motor apart. The oil (Silicone oil) was VERY black.<u></u><u></u></p></div><div><p class="ydp5e8afd33yiv2273901529MsoNormal"><u></u> <u></u></p></div><div><p class="ydp5e8afd33yiv2273901529MsoNormal">I was expecting to see something had been rubbing, but i couldnt see anything. It all looked fine. <u></u><u></u></p></div><div><p class="ydp5e8afd33yiv2273901529MsoNormal"><u></u> <u></u></p></div><div><p class="ydp5e8afd33yiv2273901529MsoNormal">I put it all back together and it runs fine in air. However, there does seem to be a louder motor running noise than the others.<u></u><u></u></p></div><div><p class="ydp5e8afd33yiv2273901529MsoNormal"><u></u> <u></u></p></div><div><p class="ydp5e8afd33yiv2273901529MsoNormal">I am unsure what the issue is. My feeling is that its carbon in the oil, making it conducting and hence slightly shorting out, causing the heat on the cable.<u></u><u></u></p></div><div><p class="ydp5e8afd33yiv2273901529MsoNormal"><u></u> <u></u></p></div><div><p class="ydp5e8afd33yiv2273901529MsoNormal">The other motor cable did not get hot, nor did the oil go black.<u></u><u></u></p></div><div><p class="ydp5e8afd33yiv2273901529MsoNormal"><u></u> <u></u></p></div><div><p class="ydp5e8afd33yiv2273901529MsoNormal">Again, another video here. <a shape="rect" href="https://www.youtube.com/watch?v=v_VxVfhM9t8&t=2s" rel="nofollow" target="_blank">https://www.youtube.com/watch?v=v_VxVfhM9t8&t=2s</a><u></u><u></u></p></div><div><p class="ydp5e8afd33yiv2273901529MsoNormal"><u></u> <u></u></p></div><div><p class="ydp5e8afd33yiv2273901529MsoNormal">Would appreciate any input. Im not sure what to do. Buy a new motor? Air compensate it?<u></u><u></u></p></div><div><p class="ydp5e8afd33yiv2273901529MsoNormal"><br clear="none">Many thanks<br clear="none">James<u></u><u></u></p></div><div><p class="ydp5e8afd33yiv2273901529MsoNormal"><u></u> <u></u></p></div><div><p class="ydp5e8afd33yiv2273901529MsoNormal"><u></u> <u></u></p></div></div></div></div>_______________________________________________<br clear="none">
Personal_Submersibles mailing list<br clear="none">
<a shape="rect" href="mailto:Personal_Submersibles@psubs.org" rel="nofollow" target="_blank">Personal_Submersibles@psubs.org</a><br clear="none">
<a shape="rect" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" rel="nofollow" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br clear="none">
</blockquote></div>
_______________________________________________<br clear="none">
Personal_Submersibles mailing list<br clear="none">
<a shape="rect" href="mailto:Personal_Submersibles@psubs.org" rel="nofollow" target="_blank">Personal_Submersibles@psubs.org</a><br clear="none">
<a shape="rect" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" rel="nofollow" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br clear="none">
</blockquote></div></div><div class="ydp5e8afd33yiv2273901529yqt0285511687" id="ydp5e8afd33yiv2273901529yqtfd34622">
</div></div></div><div class="ydp5e8afd33yqt0285511687" id="ydp5e8afd33yqtfd29224">_______________________________________________<br clear="none">Personal_Submersibles mailing list<br clear="none"><a shape="rect" href="mailto:Personal_Submersibles@psubs.org" rel="nofollow" target="_blank">Personal_Submersibles@psubs.org</a><br clear="none"><a shape="rect" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" rel="nofollow" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br clear="none"></div></div>
</div>
</div></div></body></html>