

| Subject: | Re: Checking output of alternator. |
| From: | Dennis Jowell |
| Date: | Fri, 15 Jul 2016 18:47:46 -0400 |
My thoughts exactly Thanks again Stuart for you help and everyone else Dennis J. Dennis Jowell Scotch Hollow Farm Newbury, Vermont > On Jul 15, 2016, at 5:10 PM, Stuart MacMillan <stuartmacm@gmail.com> wrote: > > Quit wasting time and get a new (Bosch rebuilt) alternator. This one is not > worth messing with. > > Stuart > > -----Original Message----- > From: Dennis Jowell [mailto:dennisjowell@gmail.com] > Sent: Friday, July 15, 2016 1:25 PM > To: Stuart MacMillan > Cc: vanagon@GERRY.VANAGON.COM > Subject: Re: Checking output of alternator. > > Belt is tight I checked that first. With WBX at idle when I hold a > screwdriver to the alternator and my ear I can hear a sound like the > bearings are noisy. AC and power steering are fairly quiet comparing all 3. > Battery is receiving no additional volts as per my digital ohm meter. > > Dennis Jowell > Scotch Hollow Farm > Newbury, Vermont > > >>> On Jul 15, 2016, at 4:05 PM, Stuart MacMillan <stuartmacm@gmail.com> >> wrote: >> >> 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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