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<div>James, </div><div>all I can think of is that one of the bearings is not quite right and causes a vibration that is making that noise & causing the brushes to wear excessively. </div><div>Alan </div><div><br></div>
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On Monday, July 19, 2021, 11:23:56 PM GMT+12, James Frankland via Personal_Submersibles <personal_submersibles@psubs.org> wrote:
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<div><div id="ydpe82291a4yiv2920685233"><div dir="ltr">Hi All<div><br></div><div>Does anyone have any ideas on this?</div><div><br></div><div>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.</div><div><br></div><div>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.</div><div><br></div><div>So, the next day i took the motor apart. The oil (Silicone oil) was VERY black.</div><div><br></div><div>I was expecting to see something had been rubbing, but i couldnt see anything. It all looked fine. </div><div><br></div><div>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.</div><div><br></div><div>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.</div><div><br></div><div>The other motor cable did not get hot, nor did the oil go black.</div><div><br></div><div>Again, another video here. <a 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></div><div><br></div><div>Would appreciate any input. Im not sure what to do. Buy a new motor? Air compensate it?</div><div><br>Many thanks<br>James</div><div><br></div><div><br></div></div>
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