TRACTOR PARTS Allis Chalmers Case & David Brown Farmall & International Ferguson Ford & New Holland John Deere Massey Ferguson Massey Harris Minneapolis Moline Oliver & Cockshutt Kubota / Yanmar

TRACTOR MANUALS

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

Ford 9N, 2N & 8N Discussion Forum

battery drain on 12 volt conversion

Welcome Guest, Log in or Register

Author

RodC

05-11-2006 16:13:13

Report to Moderator

This 1949 8n is new to me, it has a 12 volt ocnversion, i replaced the 6v coil with a 12v, tractor will run with battery disconnected after a good start and the alternator was excited, main post on alt goes to starter hot side, P2 goes to main post on alt, P1 is exciter on a button, new battery, charged all night, dead in morning or after an hour or so, holds charge if left disconnected, 6v starter, no lights, maybe a short in the starter or solonoid? any help is appreciated guys.
Rod

[Log in to Reply] [No Email]

rodc

05-19-2006 17:33:44

Report to Moderator

Re: battery drain on 12 volt conversion in reply to RodC, 05-11-2006 16:13:13

thanks to all with POSITIVE comments, you were a great help, the alternator had a bad diode, casuing hte drain, even tho it charged properly, a rare problem per the alternator shop.

Im not sure what they teach in school these days, when I went the 8N was a popular and late model tractor, I just didnt use one then, so age and wisdom come together with the help of those who have.

the tractor is alive and well.

thanks again for the help and patience RodC

[Log in to Reply] [No Email]

Russ Ehler

05-19-2006 10:16:13

Report to Moderator

Re: battery drain on 12 volt conversion in reply to RodC, 05-11-2006 16:13:13

I think those old U's are POS ground. When you put an alternator on them, you change the ground to NEG. You have to be careful or it will burn up the alternator and drain the battery. Switch your ground around. You should not get any sparks hooking up the cables.

[Log in to Reply] [No Email]

RodC

05-12-2006 05:01:17

Report to Moderator

Re: battery drain on 12 volt conversion in reply to RodC, 05-11-2006 16:13:13

thanks for the help folks....I'll have the alternator checked.

I didnt know taking the battery cable loose would damage anything, it has worked for years, it allows us with less knowledge to see if the alternator works, right? and to break out our wallets...LOL

with the battery in place, when hooking the charger cables to the battery I get a spark at the post, could this be from the alternator?

thanks again

[Log in to Reply] [No Email]

Bob

05-12-2006 07:55:02

Report to Moderator

Re: battery drain on 12 volt conversion in reply to RodC, 05-12-2006 05:01:17

I'm not sure what you mean by "with the battery in place, when hooking the charger cables to the battery I get a spark at the post, could this be from the alternator?".

Be carefull making sparks at the battery terminals so do don't have the battery blow up in your face!

Do you mean you are connecting the charger with it turned on, and it's sparking between the clips and the battery terminals, or do you have a loose terminal, and there are sparks between the terminal and the battery post?

To determine if the alternator is at fault, disconnect ALL wires from it, taping them to prevent shorts, and see of your battery drain problem goes away.

[Log in to Reply] [No Email]

rodc

05-12-2006 14:57:27

Report to Moderator

Re: battery drain on 12 volt conversion in reply to Bob, 05-12-2006 07:55:02

I guess I was not too clear, sorry, when hooking hte battery cables up, ground hooked first, when I hook the hot cable I get a spark at the hot post as I connect the cable, this is with the alternator hooked up too. I left the alterantor disconnected and charged the battery, took off the charger and let set overnight with the hot cable disconnected from the battery, battery was strong next morning, have not tried anything else yet, will get back to it this weekend..
thanks

[Log in to Reply] [No Email]

Dell (WA)

05-11-2006 21:02:08

Report to Moderator

Re: battery drain on 12 volt conversion in reply to RodC, 05-11-2006 16:13:13

Rod..... ...Yer wired correctly. take yer alternator into an autoparts store for a "free" checkout. Simple, eh? ..... ..respectfully, Dell

[Log in to Reply] [No Email]

Bob

05-11-2006 19:19:16

Report to Moderator

Re: battery drain on 12 volt conversion in reply to RodC, 05-11-2006 16:13:13

NEVER pull a battery cable while a charging system with an alternator is operating.

There's a very "good" chance of the resulting voltage spike shorting a diode in the alternator, or damaging the internal regulator.

Guess what... after either a diode or the regulator is damaged, the alternator will drain the battery while shut off!

WHY, oh WHY, do folks insist on removing battery cables while the tractor is running????

[Log in to Reply] [No Email]

souNdguy

05-11-2006 21:09:15

Report to Moderator

Re: battery drain on 12 volt conversion in reply to Bob, 05-11-2006 19:19:16

(WHY, oh WHY, do folks insist on removing (battery cables while the tractor is running????

For the same reason why the average person cannot hook up a set of headlamps, or read a simple wire diagram.. anything involving electron flow is like 'deep magic' to the average user. ( so.. what do they teach in school these days? )

Soundguy

[Log in to Reply] [No Email]

Dell (WA)

05-11-2006 21:25:22

Report to Moderator

Re: battery drain on 12 volt conversion in reply to souNdguy, 05-11-2006 21:09:15

Sounder..... ..dunnno, I correctly wired my first electrical plug as a Cub Scout when I was 9 in 1947 from the Cub Scout Manual (it had pictures). I also learned how to tie a necktie from same manual and start a bonfire to cook wennies and mushmellers. Mom was more worried about me cuttin' my fingers with her kitchen knife that I used to skin the insulation with..... ..the 10-fingered Dell

[Log in to Reply] [No Email]

souNdguy

05-12-2006 12:38:32

Report to Moderator

Re: battery drain on 12 volt conversion in reply to Dell (WA), 05-11-2006 21:25:22

Seems like kids aren't learning much in school these days.. and it isn't the teachers fault either.. it is the school system. My wife is a teacher, and she says that her kindergarten kids can't even write thir name on a piece of paper. I remember whenI was that young.. we hade to be able to write our name and know our address and telephone number when we were school age... That and all the school system seems to want to do is standardized testing.. so that's what the teachers hve to teach.. how to take those tests.. not the real stuff the kids might use during life.. etc. go figure..

Soundguy

[Log in to Reply] [No Email]

old

05-11-2006 16:56:05

Report to Moderator

Re: battery drain on 12 volt conversion in reply to RodC, 05-11-2006 16:13:13

Most likely you have a problem with the alternator, or the way it is excited. But I would first take it in and have it checked.

Hobby farm

[Log in to Reply] [No Email]

[Options] [Printer Friendly] [Posting Help] [Return to Forum] [Log in to Reply]

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