Leece Neville Alternator

Hello Daryl:

I have a Cat 3208 diesel with a Leece Neville model 150AL8A2115 alternator with 8RG2112 Sales 105-360 regulator. Can you provide a wiring diagram? Reason is that present Coach system is wired up to power alternator and regulator whenever main power switch is thrown on. This means power is being applied to alternator when any assessories such as light and fans etc, are being used without diesel running. Desire to make a simple switch circuit to turn off alternator so assessories can be used with diesel off and without risk to alternator.

Rich Johnson

Alternator charging problems

we have a SC Heavy Duty 110-258 (175Amps@5000RPM) alternator powered by a GARDNER 4LW Diesel engine. A short while ago it stopped charging the batteries and I cannot figure out why. All connections are sound, brushes are not worn - any suggestions anybody???? Unfortunately we have no wiring diagram for any of the electrical installations so tracing the cable-runs is a bit of a nightmare but possible

Thanks folks

3 Way Voltage Regulator

I have a Leece-Neville model A0012824JB alternator installed on an RV camper. It has been modified for compatibility with a DuVac electrical system. The regulator is labeled as a "3 way". What exactly is a "3 way" voltage regulator? Many thanks...

Repeat failure in 2824JB Alternator

I have Leece Neville alternator Service Part Number 2824JB, Model A001090772, date code 9508K in an American Dream motorhome model 1995. The rated output is 160 amps, 14 V. I bought this vehicle new. About 8 years ago I experienced an alternator failure, the unit was unable to keep the charge in the batteries. I managed to return home to Oregon by running the auxiliary engine charging the coach battery and using the boost switch to charge the chassis battery. I removed the alternator and the local Prestolite rep repaired the alternator, I believe they changed one rectifier.
Three days ago I was returning three days from the end of another trip and noticed that the battery voltage was low. All the batteries in this vehicle are quite new and well maintained. I managed to get back by driving in daylight, and the alternator was able to keep the battery at half charge. I removed the alternator when I arrived home. I still have not taken it to be checked, I have no means to check it running, but I have the instrumentation to read static values. The field winding (across the brushes) reads 2.3 ohms. The unit is modified to work with the Duvac System, and reading these posts I now understand a voltage surge that I had experienced in the past and nobody could explain to me. The voltage oscillated at a rate of about one cycle per second, especially noticeable at idle, which caused the headlights and instrument panel to dim slightly. I have not noticed this lately.
1) Are the phases of this alternator electrically accessible without teardown so that I can read the condition of the rectifier diodes?
2) Is the condition described above (low battery charge voltage) indicative of a loss of a phase or the regulator failure or change of setting?
3) I would like to increase the alternator amperage to about 200 or 220. Is there an drop in replacement for this model alternator that will allow me to do so?
Thanks from an old employee, I used to work as a design engineer for a common venture between Holley Carb and Prestolite back in the 60's.
Carlos Medica


We just put a new altanator on our motor home. First trip out it stayed in HIGH 15+ the higest it would read. We turned on the front air and it would come down enough to drop and turn the dash light out. Some one told us it could be the DuVac? is this something we can fix our selves? We dont know what a DuVac is.

8LHA3096U alternator rotation

I bought a new alternator Prestolite 8LHA 3096U for my boat to charge the house batteries. I'm not sure about it's way of rotation.
On my inboard engine is fitted to turn anti-clock wise (looking the pulley) and I'm not sure if I can fit my new alternator that from the data sheet I read that turn clock wise.The shop where I bought it assure me that it's fine but I don't want to damage it.
Can you please tell me if it's ok?
Many thanks,

what is the difference between a A0014727AA and the A0014727JB?

Just curious to see if the 4727aa can be used in place of the 4727jb?

alternator A0014860JB can the a/c taps on the back be used without any modification needed to be done

alternator A0014860JB can the a/c taps on the back be used without any modification needed to be done?

Regarding A0014840AAH

Dear Dary
I bought the above said model(A0014840AAH) from your indian agent.I would like to use it with my system voltage of 80volts.since it seems a Ac alternator could you tell how to connect it with Dc rectifier.(i can convert it to dc 80volts by connecting dc to dc conerter from the dc rectifier
I have seen three poles.
like this

ac? 1 f+(?) ac?(which pole)2

ac(which pole)3
Diagram of the rear view of alternator
assume ac pole 1 and 2 are between f+ f- cabin
pole three is against these two poles.

could you please tell me what poles they belong (1 2 3).
and also what is meant by f+ f- .I need to know
what is its ac voltage(ac 220 0r 110) and frequency(50/60hertz) without connecting rectifier or converter.

With regards

How conect my prestolite alternator?


I'm changing to new wires in my Volvo Penta AQ171A. The Alternator is a Prestolite, and the label where to find series nr, part nr etc is empty??

And I have search at your website but I have not find my alternator there.


B+ is market on the alternator.

Then I have D- , and I have heard that B- could be named as D-. But D- is very fussy, so I'm not sure , perhaps its D+??? I need D+, so I can connect the charging control lamp and the external current limit relay (Bosch).


Then its a connection that has no label?!


I have attached there pictures, that perhaps could help you to say what alternator this is. And how to connect it. I would be very glad if you could help me. So I can connect the alternator right, before it was wrong, for example the charging control lamp was connect to W....


Is it something more you recommend me to do with the alternator when I have an extern current limit relay? Best Regards Marcus Alm, in Sweden