Yesterday's Tractor Co.
Shop Now View Cart
   Allis Chalmers Case Farmall IH Ford 9N,2N,8N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   Traditional YT Forum ViewClassic View   RegisterRegister 
 ProfileProfile    Log inLog in 

JD 50 Single Wire Alternator Wiring


 
Post new topic    
View previous topic :: View next topic  
Author Message
Steve in IL
Long Time User


Joined: 10 Dec 2007
Posts: 620


Report to Moderator

PostPosted: Sun Oct 25, 2020 10:13 am    Post subject: JD 50 Single Wire Alternator Wiring Reply to specific post Reply with quote

Anyone have a wiring diagram for the installation of a single wire alternator onto a JD 50? Previous owner installed it, but it does not seem to be working. Amperes gauge does not move, and battery slowly runs down. Suggestions?
 
Back to top
View user's profile
buickanddeere
Tractor Guru


Joined: 31 May 2003
Posts: 37581


Report to Moderator

PostPosted: Sun Oct 25, 2020 10:26 am    Post subject: Re: JD 50 Single Wire Alternator Wiring Reply to specific post Reply with quote


Install the proper 20 amp generator .
 
Back to top
View user's profile
old
Tractor Guru


Joined: 12 Mar 2000
Posts: 95541
Location: Lake of the Ozarks area of MO

Report to Moderator

PostPosted: Sun Oct 25, 2020 10:54 am    Post subject: Re: JD 50 Single Wire Alternator Wiring Reply to specific post Reply with quote

Battery that runs down tells me the alternator has a problem. Wiring one is so simple a well trained monkey could do it. Wire from the alternator goes to the amp gauge. The side that stands alone the other side has the power and ignition hooked to it
 
Back to top
View user's profile
Steve in IL
Long Time User


Joined: 10 Dec 2007
Posts: 620


Report to Moderator

PostPosted: Sun Oct 25, 2020 12:22 pm    Post subject: Re: JD 50 Single Wire Alternator Wiring Reply to specific post Reply with quote

Hmmm. That was helpful.
 
Back to top
View user's profile
rvirgil_KS
Tractor Expert


Joined: 07 Jul 2007
Posts: 2158
Location: Northwest Kansas

Report to Moderator

PostPosted: Sun Oct 25, 2020 1:02 pm    Post subject: Re: JD 50 Single Wire Alternator Wiring Reply to specific post Reply with quote

Assuming it is the common Delco alternator, As Old says, wire from large output post on alternator goes to ammeter.

If battery runs down in relatively short time it could be bad battery or defective alternator. If it takes a couple to weeks to go down that can be the nature of some of the one wire alternators.

Not charging could be too large a pulley on alternator causing it not to build enough rpm to kick on.

You might try momentarily jumpering the #1 edge pin to the large output, or just short across the two pins. If that makes it charge you could connect it as a 3 wire configuration by running a wire from output of on-off switch with isolating diode, resistor, or lamp in the line to the #1 pin. The isolation is to preventing engine from continuing to run with engine turned off.

One advantage of the internal regulated alternator is that you got rid of a notoriously troublesome generator regulator.
 
Back to top
View user's profile
buickanddeere
Tractor Guru


Joined: 31 May 2003
Posts: 37581


Report to Moderator

PostPosted: Sun Oct 25, 2020 6:50 pm    Post subject: Re: JD 50 Single Wire Alternator Wiring Reply to specific post Reply with quote

CVPost-Steve in IL wrote:
(quoted from post at 16:22:14 10/25/20) Hmmm. That was helpful.


An alternator on a two cylinder is particularly butt ugly . Connecting A generator seems to be less confusing than an alternator .
 
Back to top
View user's profile
Jeff Oliver
Long Time User


Joined: 09 Jul 1998
Posts: 1456


Report to Moderator

PostPosted: Mon Oct 26, 2020 4:48 am    Post subject: Re: JD 50 Single Wire Alternator Wiring Reply to specific post Reply with quote

Wiring one is pretty easy. Like they say just run the wire to the Amp meter. If battery is draining I would have both battery and alt checked. If they are both good put a switch between the alternator and the amp meter. Bought a Super 88 Oliver that had that problem. They descibed it as bleeding back through alternator, whatever it was doing if you turned the switch off when you stopped tractor the battery would say up. If you left it on the battery would drain down .
 
Back to top
View user's profile
Kansas rhody
Regular


Joined: 13 Apr 2018
Posts: 126


Report to Moderator

PostPosted: Mon Oct 26, 2020 6:43 am    Post subject: Re: JD 50 Single Wire Alternator Wiring Reply to specific post Reply with quote

Should be fairly easy to check to see if the alternator is working, just use your voltmeter to see how many volts its putting out, should be well above 12.5 . If that is working next step is to check your battery, many chain auto stores can test it for free, hopefully it is something easy like your battery is just toast, if so buy one with the most cranking amps that will fit under the seat, good luck
 
Back to top
View user's profile
buickanddeere
Tractor Guru


Joined: 31 May 2003
Posts: 37581


Report to Moderator

PostPosted: Mon Oct 26, 2020 6:53 am    Post subject: Re: JD 50 Single Wire Alternator Wiring Reply to specific post Reply with quote


Why not use a diode instead of donking around worth a switch ?
 
Back to top
View user's profile
Steve in IL
Long Time User


Joined: 10 Dec 2007
Posts: 620


Report to Moderator

PostPosted: Mon Oct 26, 2020 7:02 am    Post subject: Re: JD 50 Single Wire Alternator Wiring Reply to specific post Reply with quote

Ok... Thanks for the input. Been trying to learn about this one-wire alternator option. Quick full story...
Just replaced battery, as old one was bad. Decided to also replace alternator, as old one was drenched in power steering fluid (leak now fixed). Hooked everything up, and amperage gauge does not budge. Googled new alternator part number, R111621B (Reman Ultima 63amp, the one that the counter guy at O-Reilly's said was what I needed). Not able to be set up as one wire. Considering:
a. Take alternator back and get a one-wire capable one. Concerned that spinning speed might be too slow to self excite one wire though. or...
b. Use the alternator I already have, and rewire for 3 wires. Doesn't look too tough. Might work better at low speeds?

Anyone have experience with one wire systems at slow speeds?

Thanks, Steve
 
Back to top
View user's profile
wore out
Tractor Guru


Joined: 01 Oct 2019
Posts: 5527


Report to Moderator

PostPosted: Mon Oct 26, 2020 7:12 am    Post subject: Re: JD 50 Single Wire Alternator Wiring Reply to specific post Reply with quote

CVPost-Steve in IL wrote:
(quoted from post at 08:02:40 10/26/20) Ok... Thanks for the input. Been trying to learn about this one-wire alternator option. Quick full story...
Just replaced battery, as old one was bad. Decided to also replace alternator, as old one was drenched in power steering fluid (leak now fixed). Hooked everything up, and amperage gauge does not budge. Googled new alternator part number, R111621B (Reman Ultima 63amp, the one that the counter guy at O-Reilly's said was what I needed). Not able to be set up as one wire. Considering:
a. Take alternator back and get a one-wire capable one. Concerned that spinning speed might be too slow to self excite one wire though. or...
b. Use the alternator I already have, and rewire for 3 wires. Doesn't look too tough. Might work better at low speeds?

Anyone have experience with one wire systems at slow speeds?

Thanks, Steve


All you need to do is keep the (good) standard 3-wire alternator you have, jumper it's #2 terminal to it's output stud for voltage sensing, then wire the #1 terminal to the ignition switch with an indicator light using a #194 lamp (or equivalent), a diode (1N5408 is a great choice), or a 50 Ohm 10 Watt resistor in series with the wire.

It will excite at low RPM, and you will be well pleased with the outcome, IMHO.
 
Back to top
View user's profile
James Howell
Tractor Guru


Joined: 06 Mar 2006
Posts: 15435
Location: Omaha, TX

Report to Moderator

PostPosted: Mon Oct 26, 2020 8:21 am    Post subject: Re: JD 50 Single Wire Alternator Wiring Reply to specific post Reply with quote

"keep the (good) standard 3-wire alternator"

Agree.

"jumper it's #2 terminal to it's output stud for voltage sensing"



"wire the #1 terminal to the ignition switch with an indicator light"


 
Back to top
View user's profile
:   
Post new topic    Yesterday's Tractors Forum Index -> John Deere All times are GMT - 8 Hours
Page 1 of 1

 
Jump 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 ]

YT Home  |  Forums

Modern View Forum powered by phpBB © 2001, 2005 phpBB Group

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