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
:

Alternator again

Welcome Guest, Log in or Register
Author 
Andrew Z

03-11-2006 08:45:10




Report to Moderator

Ok,I"v rechecked the wires and I"m still getting 12.6 while running. and about 12.3 when its off. The funny thing is that the ammeter is showing a 10 amp charge when its above an idle and goes back to 0 at an idle, this sounds right. I changed battries thought that might have been the trouble but the same readings. all confused now!?!
Thanks Andrew




[Log in to Reply]   [No Email]
Bus Driver

03-11-2006 16:38:18




Report to Moderator
 Re: Alternator again in reply to Andrew Z , 03-11-2006 08:45:10  
The purpose of the terminal to which the light/diode/resistor is connected is primarily to supply a current to the alternator to get it to start charging- an exciter current. Once charging starts, additional exciting is not required as long as the engine runs at a reasonable speed. Exciting the alternator with the engine not running will discharge the battery. While charging, that exciter terminal on the alternator feeds current back through the wire connected to it. If that wire originates at the ignition switch, the back feed will continue to feed the distributor, if the tractor has one, and the engine will not stop normally when the switch is turned off. The light or resistor, if used, limits the back current to an amount less than that required by the ignition, thus the engine stops when the switch is turned off. The diode permits current flow in only one direction-to the alternator. My thought is that the light is the most fragile of these devices and the resistor is the most durable. IH used the resistor when they first put alternators on their tractors in the 1970's. It was a 25 ohm wirewound. I use a 5 watt wirewound 44 ohm unit on my conversions. The typical lamp used is about 54 ohms, so the ohm value is not critical. I selected the 44 ohm resistor as a popular size between 25 and 54. Works fine.

[Log in to Reply]  [No Email]
farmallhal

03-11-2006 10:50:52




Report to Moderator
 Re: Alternator again in reply to Andrew Z , 03-11-2006 08:45:10  
Andrew, Sorry to hear you are having problems. I installed a Hitachi No. 14231 12 volt negative ground alternator on my H without any difficulty at all. I used Bob Melville's wiring diagram to the letter except I didn't use the warning light and used a 10 watt 10 ohm resistor in place of the light. Got it at Radio Shack for a couple bucks. Also, when using Bob's diagram the "1" terminal is the same as the "L" and the "2" is the same as the "S" terminal. I hooked up the wires as shown in Bob's diagram to all three of the terminals on the alternator. For the "L" and "S" terminals on the alternator, I used insulated crimp-on connectors so they couldn't contact each other as they fit quite closely on the alternator spades. If you are using existing older tractor wiring I would make certain you don't have a bad place on a wire where it could ground out to the tractor. Hope this helps but I would suggest you trace or install one wire at a time and follow it through from start to finish before looking at a different wire. Good luck, Hal.

[Log in to Reply]  [No Email]
Andrew Z

03-11-2006 11:02:24




Report to Moderator
 Re: Alternator again in reply to farmallhal, 03-11-2006 10:50:52  
I dont have one of those resistors in the wiring right now could that be the problem? I"m just running it to the ammeter with no such device. I using Bob"s wiring diagram of the Super M with alternator. I think this is the right one. Thanks Andrew



[Log in to Reply]  [No Email]
farmallhal

03-11-2006 11:16:50




Report to Moderator
 Re: Alternator again in reply to Andrew Z , 03-11-2006 11:02:24  
I think that could very well be your problem. And yes, I used Bob's Super M diagram as well. I believe the function of the warning light or the resistor is to place a load on the alternator which starts it charging. I am certainly not a person with a lot of electrical theory background but I did do a lot of research before ever starting my conversion. I used the resistor because I couldn't easily locate the correct light as called for by Bob. If this fixes it get back to me as you still have one more little thing to do so it won't drain your battery. You need to get it charging first and get that portion behind you. Hope this helps, Hal.

[Log in to Reply]  [No Email]
Andrew Z

03-11-2006 11:08:40




Report to Moderator
 Re: Alternator again in reply to Andrew Z , 03-11-2006 11:02:24  
Forgot to mention that it has been all converted over to 12volt. It has Electrical Ignition in it. if that matters Andrew



[Log in to Reply]  [No Email]
Allan In NE

03-11-2006 09:08:42




Report to Moderator
 Re: Alternator again in reply to Andrew Z , 03-11-2006 08:45:10  
Andy,

Just a couple of thoughts.

How accurate is your meter? Is that fan belt tight?

Allan



[Log in to Reply]  [No Email]
Andrew Z

03-11-2006 09:30:21




Report to Moderator
 Re: Alternator again in reply to Allan In NE, 03-11-2006 09:08:42  
I got the belt tight. I did notice that the alternator was geting hot, like could only hold my hand on there for a couple of seconds with out getitng burnt. Tihs is the second one I'v got is there any other alternator that will work for this? I sick of this hitachi
Andrew



[Log in to Reply]  [No Email]
little john

03-11-2006 09:53:50




Report to Moderator
 Re: Alternator again in reply to Andrew Z , 03-11-2006 09:30:21  
I forgot what tractor you're working with, but a Delco will fit on most. I had one on an "H" with no problem.

I also noticed that the Delco was very warm when in use..... I guess that's normal. Compare with the alternator on another vehicle.



[Log in to Reply]  [No Email]
Andrew Z

03-11-2006 10:04:58




Report to Moderator
 Re: Alternator again in reply to little john, 03-11-2006 09:53:50  
Its on a Super H. I got one of those Delco's on my H. But cant close the hood. Were you able to close the hood on yours? What belt did you use, or other modifactions? I would like to use one of those, I had good luck with them, On the H, and Super C. Thanks John Andrew



[Log in to Reply]  [No Email]
little john

03-11-2006 11:10:05




Report to Moderator
 Re: Alternator again in reply to Andrew Z , 03-11-2006 10:04:58  
I turned the generator bracket upside down and put a long bolt thru the bracket holes and the alternator holes and it lined up pretty well with a few washers added. I used mine by just letting the alternator rest against the valve cover and finding the right length belt, but would be better to make a little brace. I've seen photos of a setup where a little pulley was added below the alternator to allow for adjustmentof the belt, but sorry to say I can't find the photo. It was a tight fit, but it works, and I had the hood on properly. I'm no expert, maybe someone else can come up with better suggestions. And maybe someone has that photo that appeared on here a year or so ago.

[Log in to Reply]  [No Email]
Yugrotcart

03-11-2006 11:01:57




Report to Moderator
 Re: Alternator again in reply to Andrew Z , 03-11-2006 10:04:58  
Flip the original generator mounting bracket upside down, it will give you a little more room,



[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