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#15
by
rodpaslow
on 25 Sep, 2014 11:51
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Yeah, I have an alternator that has the W and installed it last night - was from the 2.0 ABA. Works fine. I have a new VDO tach, just have to set the pots later today and also has a potentiometer so if it's off a bit I can adjust it. I bought a cheap china electronic hand held tach, Just add a piece of it's reflective sticker to the crank and it tells speed - seems like it works well enough. Will adjust the VDO to match it - cause I hate not having a tach.
Thanks for the help!
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#16
by
rodpaslow
on 26 Sep, 2014 12:07
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I now have a working tach - current idle is about 786, by my cheap china hand held, so I set it to just below the 800 mark.
W alternator is so much easier than finding a winding before the doide on this type of alternator - in my opinion. I'm have virtually no electronics experience ...
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#17
by
rotaecho
on 11 Jan, 2016 21:01
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I'm also getting ready for a mTDI (AHU) conversion in my Westy as well and was looking for an alternator that would mount to the block that would accept the W terminal.
Reading this post the AL0184X would be a good way to obtain the W terminal.
I have the following questions:
Does this alternator have the same/similar RPM setups for the diesels?
What is required for getting the proper Tach RPM's setup for an mk2 (CE1 diesel tachometer?) configured properly for RPMs? Should an m-TDI AHU idle around 750?
Thanks! Really hoping to get a tachometer solution figured out for my conversion.
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#18
by
vanbcguy
on 22 Jan, 2016 02:19
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I have the AL0184X on mine... Works fine.
The tach you have should just plug in and work if it's for a diesel. No magic... Not sure if there is an adjustment on those older ones, I don't think there is. The tach will be approximately right though.
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#19
by
libbydiesel
on 22 Jan, 2016 09:20
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There is an adjustment pot in the circuit of each of the tachs back to mk1.
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#20
by
rotaecho
on 11 Feb, 2016 22:52
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Thanks Libby, sounds like a better option for a mTDI setup would be using the AL0184X with the W terminal. That way there's no prying off the plastic back and soldering a wire to a stock TDI alternator.
There is an adjustment pot in the circuit of each of the tachs back to mk1.
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#21
by
Achilles3588
on 05 Apr, 2020 12:06
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Swapping a 1.6 TD JX for a 1.9 mTDI AFN in a '91 Syncro Doka.
The bright shiny new Bosch Alternator Model No. AL0723X that came with the AFN does not have an explicitly W signal, rather B+, D+ and finally DF. I have seen pics above of the AL0184X where the W connection is exactly where the 0723X places the DF in a two pin connector. When looking at AHU wiring schematics it appears the DF signal is effectively equivalent to the W but that's a simplified schematic and is without looking at the alternator internals or the mfr's internal schematic. Does anyone know if the connecting the JX's W wire to the alternator's DF terminal will accomplish the tach signal objective? I don't want to void the warranty on the new alternator by making the above mods.
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#22
by
libbydiesel
on 05 Apr, 2020 20:13
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The AHU alternators I have used have had the W terminal as a marked connection. I have not used an AFN alt.
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#23
by
Frankly21
on 26 Oct, 2021 14:24
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Check your brushes and if not, see maybe where the cable does not connect at the alternator, how it connects