[T2] Bosch alternator with internal regulator

[Robert Mann]

Sorry, no opinion; could ask Geo what he recalls.
I believe the extl reg would be easier to deal with.  But perhaps the intl
reg can be reached, once you know which screws hold on the 'lid' of the
alternator.

R

On Tue, Oct 24, 2017 at 12:34 PM, Al Brase <alribee at gmail.com> wrote:

> Do you believe the internally regulated alternator to be original to 1973?
> That was not what we saw here in the US. 73-75 used the 3 wire box. perhaps
> the same part as used on the 72-79 type 4 engines.
> Al
>
> On Mon, Oct 23, 2017 at 5:07 PM, Robert Mann <robtmann7 at gmail.com> wrote:
>
>>                Bosch alternator with internal regulator
>>
>>      My early ('73) alternator has the regulator internally, with 1 wire
>> thru a hole in the casting at the top front.  I gather Bosch changed
>> design
>> surprisingly often, so that some details will vary.   The regulator turns
>> out to be a literal black box, sealed, no apparently user-serviceable
>> parts, Made in Australia, brand Ingram.  I assume this is a replacement
>> part, tho' Bosch had an Australian factory I believe  ...
>>
>>       The senior auto electrician George had concentrated on VW from
>> earlyin the peak region of their air-cooled history.  He has accumulated a
>> dozen 36mm nuts!  Visible defects he found included muck impeding the
>> spring-loaded brushes, easily cleaned and likely to collect more current
>> from the slip rings.  Sure enough, on his classic bench test rig, 50 A is
>> delivered, and the discharge warning light goes off at high revs and stays
>> off at idle.  On those criteria, we have my problem fixed.  However, the
>> copper is largely worn from the slip rings and George thinks they may
>> serve
>> only a short mileage.  We wonder if anyone has electroplated new copper
>> onto slip rings.  The rotor of which they're a part looks to be removable
>> (term 'armature' reserved for generators with those plurry commutators we
>> came to dislike  -  not to mention the pesky DC regulators  – vibrating
>> iron angle-irons with sparking points).
>>
>>
>> I suppose I could slap on The Samba an illustrated jotting about early
>> alternators.  Anyone cooperate in making it much fuller than I can?
>>
>>
>> Robt Mann
>> '73 1600dp Devon
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>
>