---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Wed 07/31/19: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 01:22 AM - Re: Buy Discount adidas Yeezy Powerphase on 2019mensjordans.com (AlanSanders) 2. 04:49 AM - Re: Repeated alternator failure (Art Zemon) 3. 02:07 PM - Re: Repeated alternator failure (Robert L. Nuckolls, III) 4. 08:58 PM - Re: Repeated alternator failure (Robert L. Nuckolls, III) ________________________________ Message 1 _____________________________________ Time: 01:22:28 AM PST US Subject: AeroElectric-List: Re: Buy Discount adidas Yeezy Powerphase on 2019mensjordans.com From: "AlanSanders" Now surely what does customer service mean to you (https://www.realinteract.com/what-does-great-customer-service-mean-to-you/) will be simply its helping effectively with good manners, then the results of good customer service is Read this topic online here: http://forums.matronics.com/viewtopic.php?p=490621#490621 ________________________________ Message 2 _____________________________________ Time: 04:49:05 AM PST US From: Art Zemon Subject: Re: AeroElectric-List: Repeated alternator failure Argonaut, I don't know much about alternators but I have never seen one that needs (or is supposed to have) any fluid inside, including motor oil. I would look for, and eliminate, the engine oil leak and see if that preserves your alternator. Now I'm going to sit back and see if my guess aligns with what the truly knowledgeable people suggest. Cheers, -- Art Z. On Tue, Jul 30, 2019 at 10:59 PM Argonaut36 wrote: > > The alternator in my Lycoming AEIO-360 engine is a Kelly Aerospace ALY > 8520 formerly known as ALY 8420. The alternator fails every 80-100 hours .. > Replacing the brushes and the brush holder (P/N 08-13833) brings back the > alternator to work. > The alternator does not fail suddenly. There is a period of time prior t o > each failure during which the alternator works intermittently, sometimes it > is on and sometimes is off. Then it stops working completely. > On the removed brushes there is a black fluid (engine oil plus brush > dust?). I don=99t know up to what extent this is normal. > Any advice on how to proceed to fix this problem permanently? -- https://CheerfulCurmudgeon.com/ *Love the stranger for you yourselves were strangers in Egypt. *Deut. 10:19 ________________________________ Message 3 _____________________________________ Time: 02:07:20 PM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Repeated alternator failure At 10:43 PM 7/30/2019, you wrote: > >The alternator in my Lycoming AEIO-360 engine is >a Kelly Aerospace ALY 8520 formerly known as >ALY 8420. The alternator fails every 80-100 >hours. Replacing the brushes and the brush >holder (P/N 08-13833) brings back the alternator to work. >The alternator does not fail suddenly. There is >a period of time prior to each failure during >which the alternator works intermittently, >sometimes it is on and sometimes is off. Then it stops working completely. >On the removed brushes there is a black fluid >(engine oil plus brush dust?). I don=99t know >up to what extent this is normal. >Any advice on how to proceed to fix this problem permanently? >Thanks > I there are no obvious sources of oil external to the alternator (engine leaks) then the next best guess i the rear alternator bearing. These are normally sealed and factory loaded with the appropriate grease. If the seal is leaking, the grease can migrate out and onto the slip rings. Bearings come in all manner of pedigree but verifying seal quality and sometimes type of grease can be problematic. Next time you replace brushes, replace the bearing too . . . and let us know how it goes. Bob . . . ________________________________ Message 4 _____________________________________ Time: 08:58:29 PM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Repeated alternator failure At 10:43 PM 7/30/2019, you wrote: > >The alternator in my Lycoming AEIO-360 engine is >a Kelly Aerospace ALY 8520 formerly known as >ALY 8420. The alternator fails every 80-100 >hours. Replacing the brushes and the brush >holder (P/N 08-13833) brings back the alternator to work. >The alternator does not fail suddenly. There is >a period of time prior to each failure during >which the alternator works intermittently, >sometimes it is on and sometimes is off. Then it stops working completely. >On the removed brushes there is a black fluid >(engine oil plus brush dust?). I don=99t know >up to what extent this is normal. >Any advice on how to proceed to fix this problem permanently? >Thanks > I there are no obvious sources of oil external to the alternator (engine leaks) then the next best guess i the rear alternator bearing. These are normally sealed and factory loaded with the appropriate grease. If the seal is leaking, the grease can migrate out and onto the slip rings. Bearings come in all manner of pedigree but verifying seal quality and sometimes type of grease can be problematic. Next time you replace brushes, replace the bearing too . . . and let us know how it goes. 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