What type of alternator is this on my 40 Ford.
 

I’m wanting to replace my alternator, doesn’t seem to be charging battery, less than 13 volts at idle. Did not check at 2000 RPM. I think it’s a 10 Si but have numbers that possibly say 6ML.

What would be a replacement if I went to a auto store, as I want to keep the same type/style.

Car Idling with headlight on reading 12.04 volts at battery.

Battery brand new, replaced a 8 year old battery.

Alternator is a Delco-Remy.

How many wires is this alternator, is it considered a one wire or two, as there are two wires going to the side of the Alternator, though one wire goes to Batt. on the Alternator.

Are there rebuilt kits for this Alternator, is there a particular year run for this Alternator.


Engine is a Chevy 350 car is 12 volt negative ground.

What is this black box, one wire goes into the car, haven’t really traced the wirings yet, does this connect to the Alternator?

It looks like at least the dash gauges are 6 volt as I can see voltage reducers under the dash. Is this black box part of the voltage reducers to run dash gauges?

Thank You

Re: What type of alternator is this on my 40 Ford.
 

Joe, we know you love your Ford, and we here on the FordBarn are happy to answer your questions about your Ford, but please, Joe, when on the Barn, keep your hood closed?

Re: What type of alternator is this on my 40 Ford.
 

Nice looking Ford. Lots of GM alternator info here. And FWIW there are many flatheads running GM alternators and I don't see anyone telling them to keep their hood closed. JMO
https://alternatorparts.com/how-to-i...lternator.html

Re: What type of alternator is this on my 40 Ford.
 

Napa Rayloc 213-4011B is what it is for a replacement

Re: What type of alternator is this on my 40 Ford.
 

Well, after Allens response, I'll try to help. It looks like the common 10 SI, that should be stamped on the case near the volts/amp rating. The white wire looped around to the power post makes it a one wire alt. The black wire will go to battery, but should be switched so it will not run the ignition off the alt after you turn off the key. Originally, that white wire went to the idiot light in the dash. Some folks wire it that way so you don't have to bring up RPM's to trigger it to start charging. There are a few different ways to wire the 10 SI, a google search will bring up diagrams.

No idea what the home made black box is, you'll have to trace the wires to figger out what they had in mind.

Re: What type of alternator is this on my 40 Ford.
 

Do we really have to debate GM alternators and Chevy 350’s on the FordBarn?

Re: What type of alternator is this on my 40 Ford.
 

Not debating anything. its a nice car, and the man is asking for help. If thats a problem you should click the back button.

Re: What type of alternator is this on my 40 Ford.
 

Well said

Re: What type of alternator is this on my 40 Ford.
 

I believe that questions like this should be directed to the HA.M.B. (although alternators are almost O/T there as well) or some other more appropriate forum. It's better for everybody, as the O/P will probably get more and better answers to his questions, and the purists won't have to sort through a lot of O/T blather.

Re: What type of alternator is this on my 40 Ford.
 

I had no intention of causing a storm. The alternator was one thing, but attached to a 350 was too much. I was as polite in my response as could be, but then, perhaps the Barn is evolving faster than I'm keeping up?

Re: What type of alternator is this on my 40 Ford.
 

I think your response was appropriate and inoffensive. This IS "The Ford Barn" with it's specific goals and rules, and if we don't try to keep things on topic someone else may do it for us, which is never good.

Perhaps The Ford Barn is evolving, but not to off-brand engine swaps

Re: What type of alternator is this on my 40 Ford.
 

Thanks for the support. I was beginning to think I was the odd man out.

Re: What type of alternator is this on my 40 Ford.
 

Yes! Thankx! That’s the info I was looking for….

Re: What type of alternator is this on my 40 Ford.
 

Yes,..Thank You!,…that’s the info I was looking for. There is a kill switch on the passenger side floor that I religiously turn on/off

Re: What type of alternator is this on my 40 Ford.
 

Thank you for the site,….

Re: What type of alternator is this on my 40 Ford.
 

The year cut off for the HAMB is 1965 and earlier. My '65 Ford Falcon with a 289 had an alternator stock so alternators are not O/T on the HAMB.

Re: What type of alternator is this on my 40 Ford.
 

Joe,
I'd never witnessed an alternator that did not have an identification number stamped into the case. With that number, a decent counter person at NAPA can quickly look it up and tell you the EXACY (original) application and the modern equivalent. Now, to find a decent counter person...that may be tough.

Re: What type of alternator is this on my 40 Ford.
 

Gee wizz guys, give the man a break. Nobody really cares who is the better “purist”. He asked a simple question.. Anyways,
I would wire it correctly according to GM. The 1 wire does work but you will be a lot happier with the idoit light and sensing wire setup. Lot better performance at low RPMs like our flatties run. Also install the smallest pully you can find. That also helps at low rpms.

https://www.sbmar.com/uncategorized/...yIVEEg2JSz1z1U

Re: What type of alternator is this on my 40 Ford.
 

Shows different amp. rating the 10Si, reason for wanting what I have. I’ll also consider dealing with this place, as they seem more professional grade.

https://alternatorparts.com/how-to-i...lternator.html

Thank You…

Re: What type of alternator is this on my 40 Ford.
 

Kube , your last sentence was spot on! Not only finding a competent one but finding one willing to do the research.

Re: What type of alternator is this on my 40 Ford.
 

Yes, probably will start with this place also, as a backup to Napa or any other auto parts store, as the 10Si shows different amp. ratings, just looking for the same one I have. Does say 10A on the casing also.

https://alternatorparts.com/how-to-i...lternator.html

Thankx for the help..

Re: What type of alternator is this on my 40 Ford.
 

Look again, I doubt it is 10 amp, smallest I've seen is 40 amp

Re: What type of alternator is this on my 40 Ford.
 

Probably a casting number ( looks like it says 10 A to these ole eyes ) or series number? of some sort, having nothing to do with amprege rating..

Re: What type of alternator is this on my 40 Ford.
 

That's a casting number of the bracket. On the BODY of the alternator there is a number stamped INTO (not raised) it.
As a general rule (there are of course exceptions) raised numbers are nearly always casting numbers. Recessed numbers are nearly always identification numbers.

Re: What type of alternator is this on my 40 Ford.
 

That’s great info, did not know that raised digits where casting, and recessed digits where ID numbers, generally speaking. That has been logged and noted. Heck I’m still learning at 70+ years old…

Thankx

Joe

Re: What type of alternator is this on my 40 Ford.
 

Re: What type of alternator is this on my 40 Ford.
 

[QUOTE=Gene1949;2427672]Gee wizz guys, give the man a break. Nobody really cares who is the better “purist”. He asked a simple question.. Anyways,
I would wire it correctly according to GM. The 1 wire does work but you will be a lot happier with the idoit light and sensing wire setup. Lot better performance at low RPMs like our flatties run. Also install the smallest pully you can find. That also helps at low rpms.

I'm with Gene, post 18. BFD if it's not 'purist'. And, I would wire it, like Gene said, per GM. Screw the one wire deal. Only the crowd with sanitary/sterile engine bays worship the one-wire nonsense. As for a replacement, any counterman should be able to solve that. If nothing else, just say 73 Chevy Impala 350... or whatever. If I were close, I'd be happy to assist. I'm sure my stash has a few working alternators of that variety. (And, stash has enough parts to fix any possible problem that your alt has.) Just sayin.....
(just for the record, and obviously OT, the last few conversions I've worked on, I used a FORD alternator, no matter what the engine was. I think the Ford alternator has a slightly cleaner-looking case. Something about a GM alternator, under a Ford hood, just doesn't look right to me. I have especially noticed this on Model A bangers. And yes, I've used the Ford alternator on top of a Chevy engine, in a Ford.) (Currently working on a 41. Torn between using a generator, or alternator.... on flathead engine.)

Re: What type of alternator is this on my 40 Ford.
 

What voltage output do you get if you push a small screwdriver in the D shaped hole as shown in the # four picture (11 o'clock position). By using the small screwdriver to ground the regulator tab you bypass the regulator and are checking the max output of the alternator.

Re: What type of alternator is this on my 40 Ford.
 

Never tried that, not sure how to do it anyway, I do see the slot you’re talking about. I’m thinking I’ll just keep the world economy moving forward and purchase a new one and be done with it. I believe this alternator itself is pretty old.

Off to the next problem…..

Thank You for your input…

Re: What type of alternator is this on my 40 Ford.
 

Joe, to test your alternator using a DC voltmeter or multimeter connected to the main alternator battery terminal. No good testing at idle, you need some revs up say around 1500 RPM and you should read at least 13.5 to 14 volts. Do that and report results back to me. Regards, Kevin.

Re: What type of alternator is this on my 40 Ford.
 

OK, but 1st I have to put the alternator back in….OK so put positive lead of meter on batt. terminal on back side of alternator and negative lead of meter to a good ground and get RPM up a bit, correct..

I only checked it at idle and at the battery itself ( battery in the trunk ) , reading 12.20 VDC. With idle and headlights on 12.04 VDC at brand new battery.

Re: What type of alternator is this on my 40 Ford.
 

[QUOTE=bobH;2427744]Thankx for the information…

Re: What type of alternator is this on my 40 Ford.
 

Needed to be said.
Anyways, I ran the chebbie alt for many year until my hearing loss became bad enough I couldn't hear the stereo very well. Replaced the 10si with a Ford Taurus 130 amp.
Pure economics. $6000 for hearing aids OR 1200 dollars for kick ass speakers and an 800 watt amp:)

Re: What type of alternator is this on my 40 Ford.
 

Reporting back as ordered……must be my military days kickin in,….After cleaning all terminals at alternator and the two pins, on side of alternator getting 14+ VDC at alternator after getting RPM 1500+. Seems all is set. Rechecked at battery in the truck, similar voltages.

Off to next project, R&R non functional vacuum wiper and going 12 VDC electric wipers.

Thankx for the advice….

Re: What type of alternator is this on my 40 Ford.
 

Recommend Newport Wipers for your conversion. JMO
https://newportwipers.com/product/1940-ford/#switches

Re: What type of alternator is this on my 40 Ford.
 

back in my day working for the cadillac dealer i rebuilt lots and lots of those alt.the amp number is stamped where the adj. bolt is it will read like 63 A. or 85 A and the other numbers will give you what your looking for hope this helps

Re: What type of alternator is this on my 40 Ford.
 

the numbers are on the top of the case that bolts to the front housing right behind the adj. bolt i could see it on the one picture you sent but it was upside down and couldn’t get my pewter to lock in to see it but if you have it working by cleaning the terminal great easy fix

Re: What type of alternator is this on my 40 Ford.
 

Your comment put a smile on my face, keep up the good work.

Re: What type of alternator is this on my 40 Ford.
 

I changed my 46 pickup to 12v, but only cause I got a real hungry 12v winch on the back. My young NAPA guy knew exactly which alternator I wanted.

Re: What type of alternator is this on my 40 Ford.
 

I seen a partial number of 61A stamped along with other numbers, so guessing they made them in 61 amps. as well as 63 amps? Anyway I’m all set, Thank You