[T3] 6 V Generator question

[Soren Jacobsen]

> On 20 Nov 2014 at 13:05, Soren Jacobsen wrote:
> 
>> Specs marked: EG -> 7V 50A 28 (90mm housing, Generator, clockwise
>> rotation, 7 Volt, 50 Amp, 2800 RPM nominal output speed) 
> 
> Soren, is that what the 28 means? I never knew what that was. If so, 
> it's interesting that the 12 V generators have a 20 there, so they 
> should be able to do their full output at lower rpms.

I got that information from a genuine VW workshop manual (not the Bentley).  That section has a publication date of November 1967.  Here, I've scanned two pages that may be of interest to you:

http://blef.org/vw/t3/E2-1.jpg
http://blef.org/vw/t3/E2-2.jpg

Note that they refer to the 1967 12V generators as being "of the early cut-in type."

> Did the 6 V generator/crankshaft pulleys produce a different 
> generator drive ratio?

The early early (until mid-December 1962) T3s had a larger crankshaft pulley than the later ones, so they would have had a different drive ratio compared to the later 6V (2.3:1) configurations.  I can't come up with the size difference immediately, and I've got to run out the door in a minute.  After that point, the crankshaft pulleys were the same size throughout the whole run of T3s (at least through 1969, which is the upper limit of my experience), with only changes being made to the timing marks.  6V generators (all of them, from what I can tell -- in addition the pre-1967 12V optional generators) had 96mm pulleys, compared to 100mm on the 1967-on 12V generators.

Doing the math on this is left as an exercise for the reader.

>> Bosch part number: 0 101 206 044
> 
> That Bosch part number always appears as a sequential pair, as in
> 
> 0 101 206 045 (0) 046
> 
> where (0) stands for the Bosch logo.
> 
> I find this everywhere, but I don't have a clear definition of what 
> it means. My best guess, based on what I've got in the way of Bosch 
> parts lists is that 045 is the part # for the basic generator while 
> 046 might be the same generator but including the pulley. Can you 
> verify that or give me a better interpretation?

Sadly, I have no idea about this.

Soren