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

Discussion Forum

Polarity or generator problelm

Welcome Guest, Log in or Register

Author

BOB

03-22-2003 20:22:03

Report to Moderator

Hi I need some help. 51 8n. changed Regulator cause cutout contacts were stickin and causing discharge. Polarized new Regulator like Dell says.
started it up. It now does not discharge but it don't charge either,amp meter stays in the middle.
Battery slowly discharges when running .Checked volt output on big stud on Gen back plate and ground, get nothing. can the polarity (
If I did it wrong)effect the generator output??
I'm getting real confused
thanks for any help
bob

[Log in to Reply] [No Email]

Jim Cox Sw Missouri 9N

03-23-2003 08:37:43

Report to Moderator

Re: Polarity or generator problelm in reply to BOB, 03-22-2003 20:22:03

Bob: This is how I polarize a late 8N generator. I jump the ARM and BATT connections just like Dell said, but I GROUND the 'F' terminal on the generator FIRST. I can polarize them on the bench, just touching a battery neg to the output terminal, and the battery pos to the field terminal. You can to it with jumper cables. Your VREG should do this anyway when the voltage is low, but try it just in case. According to the fine folds here at the home of the forum you want an 8N10505C higher current that the 10505B, but still 6V pos grd 'A' circuit
good luck
jim cox
starter rebuilder guy

Jim's Generator Page

[Log in to Reply] [No Email]

bob

03-23-2003 09:29:20

Report to Moderator

Re: Re: Polarity or generator problelm in reply to Jim Cox Sw Missouri 9N, 03-23-2003 08:37:43

Thanks Jim. The part # you stated is the one they sent me. I will try the polarize method you mentioned
bob

[Log in to Reply] [No Email]

Dell (WA)

03-22-2003 21:42:36

Report to Moderator

Re: Polarity or generator problelm in reply to BOB, 03-22-2003 20:22:03

BOB..... ...check your voltage regulator wiring....AGAIN....won't be the first time and it won't be the last time that a voltage regulator has been miss-wired.

Voltage regulator should have faintly stampped terminal letterings of FLD, ARM, BATT, ground is usually not marked. GND should be thin BLK wire w/RED tracer. FLD should be thin BLK wire w/WHT tracer. ARM should be heavy YEL wire w/BLK tracer. BATT should be heavy YEL wire with NO TRACER to terminal block.

Once you've got your voltage regulator wiring straightend out, re-polarize AGAIN. Briefly "sparkle" your BATT and ARM terminals with screwdriver tip (BATT and ARM terminals are side-by-side)..... ....Dell

[Log in to Reply] [No Email]

souNdguy

03-22-2003 21:58:21

Report to Moderator

Re: Re: Polarity or generator problelm in reply to Dell (WA), 03-22-2003 21:42:36

Any possibility your new regulator may be the wrong circuit type ( a circuit / b circuit ).

Were the original genny's a-circuit? I know mine is b-circuit.. but it has been rebuilt, and I am using the regulator the rebuild shop provided with it.

Soundguy

[Log in to Reply] [No Email]

Dell (WA)

03-23-2003 09:45:34

Report to Moderator

Re: Re: Re: Re: Polarity or generator problelm in reply to bob, 03-23-2003 07:33:54

Bob..... ....8N voltage regulator 8N-10505-C has superceeded all others and is the ONE to use IF you have any of the OEM N-Generators. And since you are unable to verify your generator, all betts are off.

Since you now supply additional voltage regulator information in the form of "non-standard" VR terminal location labeling. Your new VR terminal location description is consistant with my knowledge of VR p/n 8N-10505-C. I haven't got a clue as to what you do have.

Since your OLD voltage regulator was apparently working at one time, take your OLD voltage regulator into a good autoparts store and put it on the counter and tell'em you want one of these . Lettem earn their money..... ....Dell

[Log in to Reply] [No Email]

bob

03-23-2003 13:45:46

Report to Moderator

Re: Re: Re: Re: Re: Polarity or generator problelm in reply to Dell (WA), 03-23-2003 09:45:34

Thanks dell , looks like I got a non- OEM all right. thanks for your considerable knowlege.
Bob

[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