This site uses cookies to maintain login information on FarmallCub.Com. Click the X in the banner upper right corner to close this notice. For more information on our privacy policy, visit this link:
Privacy Policy

NEW REGISTERED MEMBERS: Be sure to check your SPAM/JUNK folders for the activation email.

Tractor cut off with battery disconnect

The Cub Club -- Questions and answers to all of your Cub related issues.
Forum rules
Notice: For sale and wanted posts are not allowed in this forum. Please use our free classifieds or one of our site sponsors for your tractor and parts needs.
Brodalick
5+ Years
5+ Years
Posts: 130
Joined: Mon Feb 12, 2018 4:59 pm
Zip Code: 28540
Tractors Owned: 1948 Cub
Location: Jacksonville NC

Tractor cut off with battery disconnect

Postby Brodalick » Mon Feb 12, 2018 7:14 pm

IMG_20180213_090404.jpg
IMG_20180213_090339.jpg
My 1948 (so I think) has been converted to 12 volt negative ground. The positive battery cable runs to the starter and coil. The coil connects to the push/pull switch. Once the tractor is cranked it can be cut off by disconnecting the positive cable. Should this happen or is my alternator not putting out?
Last edited by Brodalick on Tue Feb 13, 2018 9:09 am, edited 1 time in total.

SPONSOR AD

Sponsor



Sponsor
 

User avatar
Slim140
5+ Years
5+ Years
Posts: 4908
Joined: Wed Nov 22, 2017 6:24 am
Zip Code: 00000
Tractors Owned: .
1970 International 140
1972 International 140
1949 John Deere A
1993 Ford 4630 W/Loader
1965 John Deere 110
1961 Cub Cadet Original
Circle of Safety: Y

Re: Tractor cut off with battery disconnect

Postby Slim140 » Mon Feb 12, 2018 7:41 pm

Have you had any problems with your battery going dead? If you haven’t then something’s not wired right and it is charging.
Every home is a school, what are you teaching?

Circle of Safety

User avatar
John *.?-!.* cub owner
Cub Pro
Cub Pro
Posts: 23701
Joined: Sun Feb 02, 2003 2:09 pm
Zip Code: 63664
Tractors Owned: 47, 48, 49 cub plus Wagner loader & other attachments. 41 Farmall H.
Location: Mo, Potosi

Re: Tractor cut off with battery disconnect

Postby John *.?-!.* cub owner » Mon Feb 12, 2018 8:07 pm

Why are you disconnecting the battery cable with the engine running? the sudden loss of load can be hard on your alternator or it's internal regulator? The regulator inside the alternator should shut the output voltage down when you do that, but you take a risk of damaging the alternator or the internal regulator.
If you are not part of the solution,
you are part of the problem!!!

Eugene
Team Cub Mentor
Team Cub Mentor
Posts: 20336
Joined: Fri Jul 02, 2004 9:52 pm
Zip Code: 65051
Circle of Safety: Y
Location: Mo. Linn

Re: Tractor cut off with battery disconnect

Postby Eugene » Mon Feb 12, 2018 8:26 pm

Another possibility is that the alternator is not charging and the tractor is running off the battery. They do fail.

Which alternator do you have? Photo would greatly help.

Since there have been a number of alternator styles/configurations used in the past 50 plus years, suggest picking up a single wire alternator. It should be a simple installation and wiring task. They are not that expensive.

Edit. There is a whole lot we don't know. There is a few changes that need to be made when converting from 6V to a 12V alternator. There are numerous posts on this site about converting to a 12V alternator. Use the search function, top right of this page.
I have an excuse. CRS.

Brodalick
5+ Years
5+ Years
Posts: 130
Joined: Mon Feb 12, 2018 4:59 pm
Zip Code: 28540
Tractors Owned: 1948 Cub
Location: Jacksonville NC

Re: Tractor cut off with battery disconnect

Postby Brodalick » Mon Feb 12, 2018 8:38 pm

Wiring mirrors the 12volt wiring shown on several diagrams on the net. Battery was disconnected by mistake or accident. Positive cable was not tightened and was accidentally pulled off by my foot and motor cut off. Not done on purpose but once it happened I was thinking the motor should have kept running using the output of the alternator.

Eugene
Team Cub Mentor
Team Cub Mentor
Posts: 20336
Joined: Fri Jul 02, 2004 9:52 pm
Zip Code: 65051
Circle of Safety: Y
Location: Mo. Linn

Re: Tractor cut off with battery disconnect

Postby Eugene » Mon Feb 12, 2018 8:58 pm

Brodalick wrote:Wiring mirrors the 12volt wiring shown on several diagrams on the net.
OK. Which wiring diagram? There are two different wiring diagrams in common use today in USA manufactured vehicles.
Battery was disconnected by mistake or accident. I was thinking the motor should have kept running using the output of the alternator.
The igntion coil load should have been sufficient to keep the alternator working and the tractor running.

Back to, How about photos of the alternator from the side and back?
I have an excuse. CRS.

Brodalick
5+ Years
5+ Years
Posts: 130
Joined: Mon Feb 12, 2018 4:59 pm
Zip Code: 28540
Tractors Owned: 1948 Cub
Location: Jacksonville NC

Re: Tractor cut off with battery disconnect

Postby Brodalick » Mon Feb 12, 2018 9:01 pm

Will do. Its 9 at night here so I willtry to get pics tomorrow. Need to fix this if its wrong. Don't need to burn up my new purchase.

Eugene
Team Cub Mentor
Team Cub Mentor
Posts: 20336
Joined: Fri Jul 02, 2004 9:52 pm
Zip Code: 65051
Circle of Safety: Y
Location: Mo. Linn

Re: Tractor cut off with battery disconnect

Postby Eugene » Mon Feb 12, 2018 9:10 pm

May not be wrong. The 3 wire alternators need to have some sort of switch, diode, lamp, in one of the wires connected to the back side of the alternator to start the alternator charging. If the alternator is not excited to start charging, then no charge and if you disconnect the battery, tractor dies.
I have an excuse. CRS.

Brodalick
5+ Years
5+ Years
Posts: 130
Joined: Mon Feb 12, 2018 4:59 pm
Zip Code: 28540
Tractors Owned: 1948 Cub
Location: Jacksonville NC

Re: Tractor cut off with battery disconnect

Postby Brodalick » Tue Feb 13, 2018 9:13 am

I added pics. Sorry I added them at the start because I did not know what I was doing. The three white wires you see coning from the black tube, the middle one goes to the alternator and there is a red wire coming from the coil that goes there also. Think I will remove hood and have alternator checked. Best pics I could take with hood on.

Eugene
Team Cub Mentor
Team Cub Mentor
Posts: 20336
Joined: Fri Jul 02, 2004 9:52 pm
Zip Code: 65051
Circle of Safety: Y
Location: Mo. Linn

Re: Tractor cut off with battery disconnect

Postby Eugene » Tue Feb 13, 2018 10:34 am

I would remove the hood and then check the alternator's and tractor wiring. Making sure it's wired correctly.

If wired correctly, then remove and have tested.

My guess, Delco 10SI, but you will have to double check and find out.

If the tractor is wired correctly and it's a 3 wire alternator, there is a simple check to see if the alternator is faulty.
I have an excuse. CRS.

Matt Kirsch
10+ Years
10+ Years
Posts: 4945
Joined: Tue Jun 08, 2004 3:04 pm
Zip Code: 14559
Circle of Safety: Y
Location: Rochester, NY

Re: Tractor cut off with battery disconnect

Postby Matt Kirsch » Tue Feb 13, 2018 11:05 am

Here's a question: What does the ammeter read when the tractor is running?

Brodalick
5+ Years
5+ Years
Posts: 130
Joined: Mon Feb 12, 2018 4:59 pm
Zip Code: 28540
Tractors Owned: 1948 Cub
Location: Jacksonville NC

Re: Tractor cut off with battery disconnect

Postby Brodalick » Tue Feb 13, 2018 11:21 am

Matt that's another issue. Gauge is broken. Tractor ran yesterday and today battery is dead. My guess is a faulty alternator. I have a friend that owns an electrical shop and can rebuild it it needed.

User avatar
Slim140
5+ Years
5+ Years
Posts: 4908
Joined: Wed Nov 22, 2017 6:24 am
Zip Code: 00000
Tractors Owned: .
1970 International 140
1972 International 140
1949 John Deere A
1993 Ford 4630 W/Loader
1965 John Deere 110
1961 Cub Cadet Original
Circle of Safety: Y

Re: Tractor cut off with battery disconnect

Postby Slim140 » Tue Feb 13, 2018 11:24 am

Brodalick wrote:Matt that's another issue. Gauge is broken. Tractor ran yesterday and today battery is dead. My guess is a faulty alternator. I have a friend that owns an electrical shop and can rebuild it it needed.

IF it's the alternator and it's a 10SI like Eugene said it'll probably be cheaper just to trade it at a local auto parts store than to rebuild it.
Every home is a school, what are you teaching?

Circle of Safety

Brodalick
5+ Years
5+ Years
Posts: 130
Joined: Mon Feb 12, 2018 4:59 pm
Zip Code: 28540
Tractors Owned: 1948 Cub
Location: Jacksonville NC

Re: Tractor cut off with battery disconnect

Postby Brodalick » Tue Feb 13, 2018 11:33 am

My friend charged me $20 for my last auto alternator. Will surely check first though

Eugene
Team Cub Mentor
Team Cub Mentor
Posts: 20336
Joined: Fri Jul 02, 2004 9:52 pm
Zip Code: 65051
Circle of Safety: Y
Location: Mo. Linn

Re: Tractor cut off with battery disconnect

Postby Eugene » Tue Feb 13, 2018 11:35 am

Brodalick wrote:Tractor ran yesterday and today battery is dead. My guess is a faulty alternator.
If the Delco 10SI and other 3 wire alternators are wired incorrectly, it will run down the battery over night.

It's currently cheaper to purchase a rebuilt alternator, with warranty, than the repair parts.

I use to repair Chrysler alternators in the early 1960s.
I have an excuse. CRS.


Return to “Farmall Cub”

Who is online

Users browsing this forum: Glen and 29 guests