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  #1  
Old 11-16-2018, 05:24 PM
74-07 74-07 is offline
 
Join Date: Dec 2016
Location: Greenville, SC
Posts: 601
Default Alternator problem - here we go again

Ok, I have a Plane Power 60 amp alternator. It works fine for a while then, it doesn't. We've run out all of the wiring and checked the belt. We looked at the plug and tugged on the wire. All good. We've done this three or four times. Every time, after we check everything over, it works again for a flight or two then, we get a low voltage warning and sure enough, we're running on the battery (12.3 volts and decreasing). As a last resort, I have purchased a new plug, pins and seals. Today, while removing the old plug, I noticed that the white wire (unused) was in the correct location (#1) but the aircraft red wire was in the center pin location (#2) rather than the #3 position as depicted in the Plane Power drawing. The jumper was installed correctly between #2 and #3. Could this possibly make any difference? Can't see how it could since the red wire is connected to the jumper and would be connected to both pin locations in either case.
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  #2  
Old 11-16-2018, 06:37 PM
pjoshyjosh pjoshyjosh is offline
 
Join Date: Aug 2017
Location: Camas, Wa
Posts: 103
Default

had a similar symptom earlier this summer. But it was not intermittent once it went. Are your brushes making good contact? These are pretty easy to check visually by removing Alternator cover and removing the brush assembly.
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N8306R - PA28-140 Sold 11/2019
N72NJ - RV9A Purchased 10/2017
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  #3  
Old 11-16-2018, 06:54 PM
74-07 74-07 is offline
 
Join Date: Dec 2016
Location: Greenville, SC
Posts: 601
Default Alternator

Brand new alternator! Old one was diagnosed as having a bad internal voltage regulator. Probably have a good spare now as the problem obviously wasn't with the alternator!
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  #4  
Old 11-16-2018, 07:01 PM
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rocketbob rocketbob is offline
 
Join Date: Jun 2006
Location: 8I3
Posts: 3,758
Default

I'm now using a $40 alternator (BRAND FREAKIN NEW) and I guarantee its magnitudes more reliable than a Plane Power.
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Bob Japundza CFI A&PIA
N9187P PA-24-260B Comanche, flying
N678X F1 Rocket, under const.
N244BJ RV-6 "victim of SNF tornado" 1200+ hrs, rebuilding
N8155F C150 flying
N7925P PA-24-250 Comanche, restoring
Not a thing I own is stock.
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  #5  
Old 11-16-2018, 07:23 PM
6 Gun 6 Gun is offline
 
Join Date: Jun 2005
Posts: 846
Thumbs up Plane Power

Plane power replacement is Suzuki Samurai new ones cheap.
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  #6  
Old 11-16-2018, 08:05 PM
texdog texdog is offline
 
Join Date: Jan 2013
Location: Fredericksburg, Tx.
Posts: 374
Question Alternator

Rocket Bob, which one are you using, please?
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  #7  
Old 11-16-2018, 08:10 PM
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rocketbob rocketbob is offline
 
Join Date: Jun 2006
Location: 8I3
Posts: 3,758
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https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

The previous ND alternator I used and have years of experience with (zero failures) is $68.00. Only difference between this one and the $68 one is the clocking of the B-lead. Same casting, turned 90 deg.
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Bob Japundza CFI A&PIA
N9187P PA-24-260B Comanche, flying
N678X F1 Rocket, under const.
N244BJ RV-6 "victim of SNF tornado" 1200+ hrs, rebuilding
N8155F C150 flying
N7925P PA-24-250 Comanche, restoring
Not a thing I own is stock.

Last edited by rocketbob : 11-16-2018 at 08:14 PM.
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  #8  
Old 11-16-2018, 08:50 PM
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pilotkms pilotkms is offline
 
Join Date: Mar 2007
Location: WARNER ROBINS, GA
Posts: 525
Default Internal Regulator ??

Does this one from Amazon have internal regulator and is it ?plug and play? in place of the Plane Power? May be a good backup if so.
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RV 7A RV #9700 May 2017
N325KS the Flying K
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  #9  
Old 11-16-2018, 09:08 PM
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rocketbob rocketbob is offline
 
Join Date: Jun 2006
Location: 8I3
Posts: 3,758
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Yes, internally regulated.

Not a matter of if a PP alternator fails, but when.
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Bob Japundza CFI A&PIA
N9187P PA-24-260B Comanche, flying
N678X F1 Rocket, under const.
N244BJ RV-6 "victim of SNF tornado" 1200+ hrs, rebuilding
N8155F C150 flying
N7925P PA-24-250 Comanche, restoring
Not a thing I own is stock.
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  #10  
Old 11-16-2018, 10:29 PM
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pilotkms pilotkms is offline
 
Join Date: Mar 2007
Location: WARNER ROBINS, GA
Posts: 525
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Thanx Bob. Ordered one for my spare parts shelf. Hope one of these fixes Rob?s (74-07) problem.
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RV 7A RV #9700 May 2017
N325KS the Flying K
Built in SoCal KCCB, now in GA @ KPXE
800+ Hours & 7X cross the USA
OSH flyin 2018 & 2019 & Petit Jean 2019 & 2021
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