Date: Fri, 15 Jul 2016 18:47:46 -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.
In-Reply-To: <000001d1dedd$4e814b50$eb83e1f0$@gmail.com>
Content-Type: text/plain; charset=us-ascii
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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