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Date:         Fri, 15 Jul 2016 16:36:44 -0400
Reply-To:     Dennis Jowell <dennisjowell@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Dennis Jowell <dennisjowell@GMAIL.COM>
Subject:      Re: Checking output of alternator.
Comments: To: Richard Koerner <rjkinpb@SBCGLOBAL.NET>
In-Reply-To:  <1216832558.572793.1468613870242.JavaMail.yahoo@mail.yahoo.com>
Content-Type: text/plain; charset=us-ascii

Could be. Are they replaceable ? The 88' WBX alternator Has them? I'm not familiar with that. I should check my Bentley. I know my old VW's generators had them

Dennis J

Dennis Jowell Scotch Hollow Farm Newbury, Vermont

> On Jul 15, 2016, at 4:17 PM, Richard Koerner <rjkinpb@SBCGLOBAL.NET> wrote: > > Could it be brushes in alternator are worn out? Might partially explain squealing and not making enough voltage. > Rich > San Diego > > From: Stuart MacMillan <stuartmacm@GMAIL.COM> > To: vanagon@GERRY.VANAGON.COM > Sent: Friday, July 15, 2016 1:05 PM > Subject: Re: Checking output of alternator. > > Bad alternator or slipping belt. Check that before you replace it. > > Stuart > > -----Original Message----- > From: Dennis Jowell [mailto:dennisjowell@gmail.com] > Sent: Friday, July 15, 2016 12:18 PM > To: Stuart MacMillan > Cc: vanagon@GERRY.VANAGON.COM > Subject: Re: Checking output of alternator. > > With load alternator is 14.4 then it started to make loud squealing noises

> VOM went down to 13.8 if I accelerate to 3000 rpm's volts jump between 13.4 > -14.4 but not all the time. > Conclusions? > > Dennis Jowell > Scotch Hollow Farm > Newbury, Vermont > > >>> On Jul 15, 2016, at 2:15 PM, Stuart MacMillan <stuartmacm@gmail.com> >> wrote: >> >> Alternator is bad, given everything you've said. Test under load with >> the headlights on and heater fan on, should be over 13.5 minimum, >> looks like yours isn't. >> >> Stuart >> >> -----Original Message----- >> From: Dennis Jowell [mailto:dennisjowell@gmail.com] >> Sent: Friday, July 15, 2016 10:47 AM >> To: Stuart MacMillan >> Cc: vanagon@GERRY.VANAGON.COM >> Subject: Re: Checking output of alternator. >> >> Just got back from a test ride. I checked the output of the alternator >> at idle its 14.1 at the stud positive and grounded on engine frame and >> stays there at high rpm. Yesterday I installed a new battery, changed >> it to 13.5 volts, drove 75 miles, new battery is now at 11.9-12.3. >> Engine is at running temp. I have no idea where to go now. I thought >> the 5 years old battery was DOD so,I changed it. All cables and wire >> are tight on battery and alternator. All have dielectric on them. >> Help! Any thoughts where or what I should look at? >> >> Dennis Jowell >> Scotch Hollow Farm >> Newbury, Vermont >> >> >>>> On Jul 14, 2016, at 12:40 PM, Stuart MacMillan <stuartmacm@gmail.com> >>> wrote: >>> >>> You need a high end tester/charger for this. Parts stores and Sears >>> repair shops will test it for free. Should have a minimum 75% output >>> with headlights lights and heater fan on. Alternatively, you can >>> measure the voltage at the alternator under this load. Ideal output >>> should be 14.2 volts, but 14 is typical. If 13.2 or less I consider >>> it >> junk. >>> >>> I've replaced two recently that tested 25% with Bosch rebuilds from >>> my local supplier (who could also switch the pulley for me), one of >>> which tested at 50% when installed. They replaced it. It's just the >>> poor QC of rebuilds, so test your "new" alternator too. >>> >>> Stuart >>> >>> -----Original Message----- >>> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On >>> Behalf Of Dennis Jowell >>> Sent: Thursday, July 14, 2016 9:11 AM >>> To: vanagon@GERRY.VANAGON.COM >>> Subject: Checking output of alternator. >>> >>> After driving my Westy to Middlebury, Vermont area decided to visit a >>> historical site in town. Westy started slow but it started back to >>> the >> farm. >>> Stopped at another state park and had some lunch. Westy now won't start!! >>> Ugh! I used the aux battery to get it going and got home. Main >>> battery is new. I suspect the alternator is NG. Once again trying to >>> understand the Bentley test procedures on Pg. 27.18. What is " >>> connect alternator/regulator tester" ?? All I have is my digital ohm >>> meter. Is that what they are saying ? >>> >>> Dennis J >>> >>> Dennis Jowell >>> Scotch Hollow Farm >>> Newbury, Vermont >>


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