Welcome! Please use the navigational links to explore our website.
PartsASAP LogoCompany Logo Auction Link (800) 853-2651

Shop Now

   Allis Chalmers Case Farmall IH Ford 8N,9N,2N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver

Farmall & IHC Tractors Discussion Forum
:

Farmall 100 12 volt question

Welcome Guest, Log in or Register
Author 
Jrry

07-27-2007 05:56:05




Report to Moderator

I need an alternator for my 12 volt conversion. I have a couple alternators but the front pully does not extend far enough out for the belt. The pully housing will not let me extend out enough. Can someone tell me what alternator to purchase that will give me the correct pully arrangement. I know some have the double pully but I don't think even that is far enough out for the belt. the pully off the generator has the same size shaft (diamator)but needs a long shaft alternator to work. The pully on the alternator will need to extend out several inches from the body (sorry but I did not measure it yet). The set up is two hole at 12 o'clock and six o'clock. I hope this discription isn't confusing. thanks for any help.

[Log in to Reply]   [No Email]
Hobo,NC

07-27-2007 17:49:28




Report to Moderator
 Re: Farmall 100 12 volt question in reply to Jrry, 07-27-2007 05:56:05  
100 pix



[Log in to Reply]  [No Email]
Hobo,NC

07-30-2007 06:26:10




Report to Moderator
 Re: Farmall 100 12 volt question in reply to Hobo,NC, 07-27-2007 17:49:28  
7127 is the generic # for a GM 10SI alt. 1975 to mid 80's GM pick up with 350" engine. As mentioned a pulley with a double grove should get ya in the ball park. I remember Chevy trucks with in line 6 cylinders using this type of pulley, it also ran the power steering belt that's why it had the extra grove. You may have the parts man look it up for a 250-6 are a 292- 6 with P/S, and may have to get into a 30-40-50-60 series truck to find it. I would think any starter/alt shop would Carrie this type of pulley. I figger a standard single groove pulley would work BUT it would make it EZ'er if the alt could B set back like the one in my pix. The sharpest guy I know about this alt stuff is Bob, I will shoot'em a email and see what he has to say.

[Log in to Reply]  [No Email]
Jrry

07-30-2007 05:53:47




Report to Moderator
 Re: Farmall 100 12 volt question in reply to Hobo,NC, 07-27-2007 17:49:28  
Hobo, I tried to use my generator pully on my Delco Alt. but the shaft wasn't long enough and the shaft did not go far enough through the gen pully to attach the nut to the shaft. Maybe I have the wrong Delco Alt. Which Delco alt should I get so it will work like yours. My brackets will work if I could use the gen pully as you have set up. thanks, Jerry



[Log in to Reply]  [No Email]
Hugh MacKay

07-27-2007 19:02:00




Report to Moderator
 Re: Farmall 100 12 volt question in reply to Hobo,NC, 07-27-2007 17:49:28  
Hobo: Just curious, is that the former generator pulley with hub machined shorter? I looked at doing this with my generator pullies, however the dual pullies I use are about 3/4" smaller diameter, thus driving the alternator much faster. It worked well thus I have been reluctant to change.

I don't have diodes or small lamps to excite my alternators. Since these tractors have an extra wire in the harness, I added a push button type switch below switch on dash and use that extra wire. With the smaller pullies my 140 excites on it's own 90% of the time. 130 never does, and SA about 50%. If they don't excite on their own, I just hit the button.

My alternators are mounted very similar to yours except about 2" higher. My throttle rod from governor to carb is about midway up alternator. I did my 130 first, no problem, however the one I have on my SA does interfere with unhooking hood latch. I have to unhook the right side first. Of course the SA hood being 2" lower is the difference. This has allowed my alternator to tuck in much closer to engine block, roughly 1", allowing the throttle rod free movement behind the alternator. This puts the alternator about 2" from cultivator lift frame.

[Log in to Reply]  [No Email]
Hobo,NC

07-27-2007 20:07:31




Report to Moderator
 Re: Farmall 100 12 volt question in reply to Hugh MacKay, 07-27-2007 19:02:00  
"Hobo: Just curious, is that the former generator pulley with hub machined shorter?"

Dunno I added the alt some 25 years ago for the guy I brought it from. Do know I used the pulley form the gen that was on it.

"
I looked at doing this with my generator pulleys, however the dual pulleys I use are about 3/4" smaller diameter, thus driving the alternator much faster. It worked well thus I have been reluctant to change."

Me either if I had a set up that works and yours should werk better. I have not had a problem but do not run lights.


"I don't have diodes or small lamps to excite my alternators"

I use a dio


"This puts the alternator about 2" from cultivator lift frame."

dunno know how far mine clears but its not a problem, not even close.

[Log in to Reply]  [No Email]
Hobo,NC

07-27-2007 15:43:26




Report to Moderator
 Re: Farmall 100 12 volt question in reply to Jrry, 07-27-2007 05:56:05  
going to give ya something to think about then going to look for a pix of mine. the first GM 10SI i installed on my 100 I used the original gen pulley and still run it. I put the top hole that is used for the adjustment to the bottom original base and the big 3/8" base to the top on the adjustment bracket and it all aligned up, no modifications. I ran it that way over 10 years till I rebuilt the engine and made a nicer set up, will look for a pix of the way i have it now.

[Log in to Reply]  [No Email]
Hugh MacKay

07-27-2007 13:33:29




Report to Moderator
 Re: Farmall 100 12 volt question in reply to Jrry, 07-27-2007 05:56:05  
Jerry: I have Delco alternators on my SA, 130 and 140, all with double pulleys from 80S GM V8. I weld a flat plate 1/4'x2"x 6" on top of the old generator bracket, then just add uprights to pin the alternator.

I have a close up photo of my SA with alternator mounted scanned and on file. Send me an e mail and I'll return the photo to you.



[Log in to Reply]  [No Email]
Bob M

07-27-2007 10:57:43




Report to Moderator
 Re: Farmall 100 12 volt question in reply to Jrry, 07-27-2007 05:56:05  
Did you try swapping the pulley from the old generator onto the alternator? I successfully done that on most of the alternator conversions I've made. (Swap just the pulley - leave the existing cooling fan and spacer in place on the alternator)

If that does not work, try to locate a generator pulley from a Minne Mo U or UB tractor. It'll fit directly onto the Delco alternator and will position the V belt groove about 1-1/2" forward relative to the stock alternator pulley groove.

[Log in to Reply]  [No Email]
Jrry

07-27-2007 11:08:00




Report to Moderator
 Re: Farmall 100 12 volt question in reply to Bob M, 07-27-2007 10:57:43  
Bob, I did try the generator pully but the shaft on the alternator was too short. The pully would not go on it far enough to attach the bolt that would hold it on. thanks



[Log in to Reply]  [No Email]
Harold H

07-27-2007 08:26:25




Report to Moderator
 Re: Farmall 100 12 volt question in reply to Jrry, 07-27-2007 05:56:05  
If you want to convert to 12V but still retain the original look, you can use a 12V generator and all will fit and look original.

Harold H



[Log in to Reply]  [No Email]
Floyd352

07-27-2007 06:07:11




Report to Moderator
 Re: Farmall 100 12 volt question in reply to Jrry, 07-27-2007 05:56:05  
I moved the alt brackets and I think I bolted a frame to one of the old bracke to make it fit.[used an old GM alt] Also on a H I put the alt in front of the bracket and used long bolt to attach it to the existing bracket.



[Log in to Reply]  [No Email]
Jrry

07-27-2007 06:21:21




Report to Moderator
 Re: Farmall 100 12 volt question in reply to Floyd352, 07-27-2007 06:07:11  
I thought about putting the alt in front of the brackets but was not sure how steady that would be. I was trying to use existing brackets if possable. Maybe with the long bolts that would be the answer. thanks



[Log in to Reply]  [No Email]
matt(pa)

07-27-2007 08:52:18




Report to Moderator
 Re: Farmall 100 12 volt question in reply to Jrry, 07-27-2007 06:21:21  
Don't forget, if you are using a Delco alternator (old GM), there is a bolt on the back of the alt that can be used for another anchor point, if you are concerned about the stability. They bolt is there for grounding the Alt, although no one ever uses it because it grounds well enough through the regular mounts.
I used that bolt as a third anchor point on a cub a few years ago, and it worked fine.

[Log in to Reply]  [No Email]
[Options]  [Printer Friendly]  [Posting Help]  [Return to Forum]   [Log in to Reply]

Hop to:


TRACTOR PARTS TRACTOR MANUALS
We sell tractor parts!  We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]

Home  |  Forums


Copyright © 1997-2023 Yesterday's Tractor Co.

All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy

TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.

Yesterday's Tractors - Antique Tractor Headquarters

Website Accessibility Policy