Yesterday's Tractor Co. Parts for Farm Tractors - Compare our Prices!
Click Here or call 800-853-2651 
   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 in to check your private messagesLog in to check your private messages   Log inLog in 

Going to negative ground on 620

Goto page 1, 2  Next
 
Post new topic    
View previous topic :: View next topic  
Author Message
RMOMN
Regular


Joined: 03 Jul 2008
Posts: 103


Report to Moderator

PostPosted: Thu Jan 24, 2013 3:31 pm    Post subject: Going to negative ground on 620 Reply to specific post Reply with quote

When installing a alt. and going to neg. ground. Will all the gauges still work?
 
Back to top
View user's profile
rickdeere
Guest






Report to Moderator

PostPosted: Thu Jan 24, 2013 4:23 pm    Post subject: Re: Going to negative ground on 620 Reply to specific post Reply with quote

youll need to change wires around on amp gauge
 
Back to top
rickdeere
Guest






Report to Moderator

PostPosted: Thu Jan 24, 2013 4:23 pm    Post subject: Re: Going to negative ground on 620 Reply to specific post Reply with quote

youll need to change wires around on amp gauge and coil wires
 
Back to top
RMOMN
Regular


Joined: 03 Jul 2008
Posts: 103


Report to Moderator

PostPosted: Thu Jan 24, 2013 5:33 pm    Post subject: Re: Going to negative ground on 620 Reply to specific post Reply with quote

Will I need to do anything on the fuel gauge?
 
Back to top
View user's profile
buickanddeere
Tractor Guru


Joined: 31 May 2003
Posts: 25490
Location: in front of computer

Report to Moderator

PostPosted: Thu Jan 24, 2013 6:11 pm    Post subject: Re: Going to negative ground on 620 Reply to specific post Reply with quote

Nothing to gain by cob jobbing an alternator onto a 620. The factory 20amp generator is a good producer.
An alternator on a two cylinder also looks butt ugly.
Coil polarity is important too.
 
Back to top
View user's profile
fixerupper
Tractor Guru


Joined: 12 Oct 2003
Posts: 8507
Location: Albert City Iowa

Report to Moderator

PostPosted: Thu Jan 24, 2013 6:49 pm    Post subject: Re: Going to negative ground on 620 Reply to specific post Reply with quote

I agree with Buick all the way unless you plan on pulling an implememt that requires a lot of juice. The only time I saw a 620 changed to an alternator that really needed one was when the farmer bought a new White planter that had an electric drive of some sort, that he planned to pull with his 620. Jim
 
Back to top
View user's profile
RMOMN
Regular


Joined: 03 Jul 2008
Posts: 103


Report to Moderator

PostPosted: Thu Jan 24, 2013 7:15 pm    Post subject: Re: Going to negative ground on 620 Reply to specific post Reply with quote

I just bought the tractor to use and that was already done.
 
Back to top
View user's profile
fixerupper
Tractor Guru


Joined: 12 Oct 2003
Posts: 8507
Location: Albert City Iowa

Report to Moderator

PostPosted: Thu Jan 24, 2013 8:20 pm    Post subject: Re: Going to negative ground on 620 Reply to specific post Reply with quote

OK, so now you have to work with the hand you're dealt. Like what was said, the ammeter wiring needs to be reversed, the primary wire on the coil changed so the negative side goes to the points. I've had good luck with generators on two bangers. The down side to a genny is the damage to your pocketbook when it comes time for replacement of the genny or regulator. Jim
 
Back to top
View user's profile
rickdeere
Guest






Report to Moderator

PostPosted: Fri Jan 25, 2013 3:16 am    Post subject: Re: Going to negative ground on 620 Reply to specific post Reply with quote

no I dont think so
 
Back to top
Mike M
Tractor Guru


Joined: 31 Mar 1998
Posts: 18657


Report to Moderator

PostPosted: Fri Jan 25, 2013 5:48 am    Post subject: Re: Going to negative ground on 620 Reply to specific post Reply with quote

If you have a working fuel gauge now on 12V + grd. It will now not work ! You will have to try and find a neg. grd. gauge.
 
Back to top
View user's profile
RMOMN
Regular


Joined: 03 Jul 2008
Posts: 103


Report to Moderator

PostPosted: Fri Jan 25, 2013 6:08 am    Post subject: Re: Going to negative ground on 620 Reply to specific post Reply with quote

Thanks Mike, what gauges will have to be changed now that it is neg. ground?
 
Back to top
View user's profile
RMOMN
Regular


Joined: 03 Jul 2008
Posts: 103


Report to Moderator

PostPosted: Fri Jan 25, 2013 6:18 am    Post subject: Re: Going to negative ground on 620 Reply to specific post Reply with quote

Thanks Jim, I'm sure that's why it has a alt. on it. Now I have to figure out what needs to be done so I have working gauges. Bob
 
Back to top
View user's profile
Mike M
Tractor Guru


Joined: 31 Mar 1998
Posts: 18657


Report to Moderator

PostPosted: Fri Jan 25, 2013 6:58 am    Post subject: Re: Going to negative ground on 620 Reply to specific post Reply with quote

Just swap the leads on the ampmeter. The fuel gauge is the only fussy one. Did it work before ? It might not of ? If not it could also have a bad tank sender. But the fuel gauges are definatly ground specific. There are some guys around rebuilding gauges maybe they can make them both + or - grd.
 
Back to top
View user's profile
fixerupper
Tractor Guru


Joined: 12 Oct 2003
Posts: 8507
Location: Albert City Iowa

Report to Moderator

PostPosted: Fri Jan 25, 2013 8:31 am    Post subject: Re: Going to negative ground on 620 Reply to specific post Reply with quote

The only electric gauges are the fuel gauge and the ammeter. I'd be surprised if you DO have a working fuel gauge. Usually the sender gives up the ghost in those old girls. To check it out pull the top dash panel back a bit to get access to the back of the fuel gauge. It's held on by those four 5/16" cap screws that might or might or might not twist off. Find the wire that comes off the top of the fuel tank to the fuel gauge and ground the terminal it hooks to with the switch turned on. Just bump the grounding wire to the terminal in case you're touching the hot one. You should NOT have sparks at all. If you are getting power to the gauge and the gauge itself works and you are touching the right terminal it should peg full. If there's no reaction, run a jumper wire from a hot source to the power side of the gauge and try it again. When you first touch the jumper wire to the gauge just bump it to the gauge to see what happens in case there's a short somewhere that makes smoke. You'll figure it out. It's pretty straight forward. If the sender is bad they are available now in the reproduction market but I'll be darned if I remember where. Someone else might chime in. I got a repro sender and refurbished gauge for my 630 and it works fine. Jim
 
Back to top
View user's profile
gtx1967jewison
Tractor Expert


Joined: 21 Oct 2007
Posts: 2610


Report to Moderator

PostPosted: Fri Jan 25, 2013 3:36 pm    Post subject: Re: Going to negative ground on 620 Reply to specific post Reply with quote

20 amps wont even run a decent, practical set of healights. They draw 30. If gennys are so great why were they $hit canned for 'new-fangled' alternators? Because more power & LESS maintenance were desired. My opinion is they only belong on trailer-queens/parade toys. To each his own.
 
Back to top
View user's profile
Display posts from previous:   
Post new topic    Yesterday's Tractors Forum Index -> John Deere All times are GMT - 8 Hours
Goto page 1, 2  Next
Page 1 of 2

 
Jump to:  
TRACTOR   PARTS TRACTOR   MANUALS
Same-Day Shipping! Most of our stocked parts ship the same day you order (M-F).  Expedited shipping available, just call!  Most prices for parts and manuals are below our competitors.  Compare our super low shipping rates!  We have the parts you need to repair your tractor.  We are a Company you can trust and have generous return policies!   Shop Online Today or call our friendly sales staff toll free (800) 853-2651.

YT Home  |  Forums Home

Copyright © 1997-2014 Yesterday's Tractor Co.

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