Yanmar 3GM30 alternator wiring....

[lateral]

Looking at both circuit diagrams, they are both negative brush to earth regulated.
I don't know what the inside of a Hitachi looks like, but my ADR0439
looks identical to a delco 10si.

https://alternatorparts.com/10si-15s...al-page-2.html

What I have drawn is easy so I'm happy-- as long as it works.

[lateral]

For id of my purchase- see attached sales speil.
As you kindly pointed out, I have the option of either, with MG's regulator, which suits me in case I want to run a 614 later.
Maybe your Alternator is a hitachi clone.

[becrux]

Thanks for straightening me out.
I stand corrected. I got bad information from the Sterling regulator installation manual, page 5 on http://www.sterling-power-usa.com/li...structions.pdf

It seems the vast majority of alternators are negative field control, and Balmar is one of the few (only?) manufacturers clinging to positive field control. I like the features on their regulator, but I'm a little chagrined that they don't accommodate neg field alternators.

Oh well. At least I was able to convert my alt to use the Balmar reg, and I can switch it back if I ever need to dump the Balmar.

Fair winds,
-b

[Yex]

Originally Posted by lateral

For anyone who is considering this route, replacing with clone etc. ADR0439 alternator
from DB electrical (Ebay) 98mm non-OEM alt pulley giving 1.5:1 ratio.


DB electrical were technically like tits on a bull. Otherwise they were good.
They knew they were selling an alternator, thats about all.

I realized this is an older post but the subject is still actual.

I too purchased an ADR0439 from "db electrical" and received no support what so ever from them...

The original alternator had an excitation field, output, a ground and some other unused screw.

The ADR0439 has an output and another screw that I don't know what it's for. Can someone help me?

I tried to insert an image to show the alternator but it does not seem to work. PLease check this link: http://forums.voileabordable.com/fil...y_attachment=1

[Yex]

Hi again,

I found this image. It's the top screw (beside the black excitation connector) that I'm wondering what is it's purpose.

Does anyone know it?

Thanks,

Yex

[lateral]

Sorry can't help you. I gave up on that alternator and never used that terminal.
Would not run cool enough at the output I wanted.
I ended up using a Bosch (k -series I think) out of a Porsche 944. Perfect for external regulation. You can buy external brush module without regulation so you can plug straight into that.
The big plus is it comes with a cowling to bring in cold air from outside the engine room, fan assisted if you want.
There are other Bosch double internal fan alternators that will work well but not at this price point.
You do need to cut 3 mm off inside of one leg and pack the other with a couple of washers/shims to get alignment right.
Easy.

[lateral]

Tachometer?

[Selinaris]

Same connection as a DELCO 10SI