Mounting alternator on Major

This forum is for the Fordson New Major, including the Super Major and the Power Major.
Post Reply
leeroy
True Blue
Posts: 136
Joined: Thu Dec 08, 2011 11:43 pm
Location: R.I., U.S.A.
Contact:

Mounting alternator on Major

Post by leeroy »

Bearing is bad on original dynamo. The wires were clipped off when we got it. We've just kept battery charged between uses.
Upon taking generator apart it appears too far gone to rebuild. Lots of rust internally.
I'd need over $200 in new parts including a new loom, key switch, regulator, Dynamo and pulley.
We've more than a few good alternators at hand and feel like that's our best option at this point being a working tractor.
With that said I was hoping to find some pictures of mounting options and tension ideas.
Thanks, Lee

leeroy
True Blue
Posts: 136
Joined: Thu Dec 08, 2011 11:43 pm
Location: R.I., U.S.A.
Contact:

Re: Mounting alternator on Major

Post by leeroy »

Found some brackets and got a new one wire alt mounted and wired. Similar wiring as we did on N 8N. Alt wire to positive post on battery.
But not charging battery. Unless I'm testing wrong the alternator is not charging at it +post on back either, even at high idle.
I'm going to look into wiring in a seperate ground to alternator, as I question mounting ground is enough. I did reverse battery so it is negative ground.
My other concern is this tractor does not have a switch or key. It's wired as: battery to solenoid and still uses original starter with the relay switch.
Any thoughts on this?

John b
True Blue
Posts: 298
Joined: Tue May 19, 2020 8:40 pm

Re: Mounting alternator on Major

Post by John b »

Hi Lee, never used a single wire alternator but if the earth is ok check what speed it needs to turn to produce a current. I have a standard type alternator on one of my majors and it doesn't start charging unless i rev it to well over half throttle, then it will stay charging at tickover speed. Was reading that some single wire alternators have a 'cut in' point of 1200 rpm, try revving the engine and see if it starts charging
John
My biggest fear is that when i die my wife will sell my tractors for what i told her they cost

Pavel
True Blue
Posts: 522
Joined: Thu Sep 01, 2011 1:54 pm
Location: Western Australia

Re: Mounting alternator on Major

Post by Pavel »

Are we to assume that this is a Power/Super Major -- the one that you previously asked for help with gear box problems? If so then it must, at some time, had a Ford fitted keyed/mechanical switch along with a red light and/or an ammeter -- this to excite your dynamo which had 2 wires; 1 in from the switch, and 1 out to the battery via a regulator box.
Your alternator will, almost certainly, be internally regulated and therefore the old dynamo regulator box must be removed and the wires joined together to complete their related circuits. However, 2 wires are still required -- 1in; 1 out as well as a switch
May I suggest you post the make and model of your alternator so that both you and I can Google the wiring circuits?
Pavel

John b
True Blue
Posts: 298
Joined: Tue May 19, 2020 8:40 pm

Re: Mounting alternator on Major

Post by John b »

The single wire alternators do not require an activating wire in, as they are 'self exciting' only one out to the battery
My biggest fear is that when i die my wife will sell my tractors for what i told her they cost

leeroy
True Blue
Posts: 136
Joined: Thu Dec 08, 2011 11:43 pm
Location: R.I., U.S.A.
Contact:

Re: Mounting alternator on Major

Post by leeroy »

Thanks guys.
Pavel: It's a remanufactured Delco Remy 10DN. Appreciate you asking as that prompted me to look a little deeper.
The Tractor is my '55 FMD. The Power Major I asked about in the other thread was for sale.
Unfortunately that tractor is still sitting in someone's yard. I pass it commuting but never see anyone there anymore and have lost his phone number. He had another Major that was in back that could not be seen from road. If any more develops on those Ill be sure to post on here.
Iam going to try "exciting" it today. It's rare but apparantly one wire alternators can lose magnetism if on shelf for too long.
John B I will try to find out rpm needed before it starts charging.
I've also ordered a shorter belt. Someone put a pipe extension on the block drain, which limits tightening the alternator.
It was not as tight as I wanted, but thought it would have charged.
Edit: might be a Delco 10 SI
The outfit we bought it from advertises it as internally regulated, but there oem states it is a remanufactured 10DN which was originally externally regulated?! Maybe it's converted during rebuild?

Pavel
True Blue
Posts: 522
Joined: Thu Sep 01, 2011 1:54 pm
Location: Western Australia

Re: Mounting alternator on Major

Post by Pavel »

I suggest, Leeroy, you google and watch the video to be found under the heading
'How to wire a 1 wire alternator [10SI Delco style] to a farm tractor'
And if that's GMs idea of '1 wire' I need to consult my school's 1 times tables again!
Enjoy your self.
Pavel

John b
True Blue
Posts: 298
Joined: Tue May 19, 2020 8:40 pm

Re: Mounting alternator on Major

Post by John b »

I hang my head in shame Pavel, i never realised you could add an exciter wire to them if they are running at low revs. I assumed that one wire alternator meant just that (but as the saying goes assumption is the mother of all f***ups!) I'll know now if i ever fit one. Thanks for pointing that out
John
My biggest fear is that when i die my wife will sell my tractors for what i told her they cost

leeroy
True Blue
Posts: 136
Joined: Thu Dec 08, 2011 11:43 pm
Location: R.I., U.S.A.
Contact:

Re: Mounting alternator on Major

Post by leeroy »

It's me that should be hanging my head in shame- the alternator I've been dealing with is externally regulated!
Our Major has no control box/ regulator. It's been a while since we first got "Hyacinth" going, but I recall anything
Inside of the instrument box was rusted beyond recognition.
Pave- thanks for that video.

Emiel
True Blue
Posts: 578
Joined: Wed Apr 16, 2008 3:22 pm
Location: Netherlands

Re: Mounting alternator on Major

Post by Emiel »

Hi,

Maybe you should find a Lucas generator and a control box and wire it up original. Looks decent and works usually well.

These alternators look out of place on a major.

Rgds emiel
Best regards

Emiel

N 1937, E27N 1948, 8N 1949, E27N 1950, E1A Diesel 1953, E1ADKN PP 1956, Dexta 1959, NH Clayson M103 1964

Pavel
True Blue
Posts: 522
Joined: Thu Sep 01, 2011 1:54 pm
Location: Western Australia

Re: Mounting alternator on Major

Post by Pavel »

Agreed, Emiel. However, I believe that Leeroy lives in the U.S of A where there are probably very few second hand Lucas internally regulated twin wire alternators around. Here in Oz I fitted a 25amp Lucas some 12 years ago -- no problems since. There is the option of twin wire Bosch ones as well.
Whilst wiring them up is a dream, joining the wires together from the now discarded old regulator is another matter. I should add that I posted a 'how to' when I fitted mine.
Pavel

Emiel
True Blue
Posts: 578
Joined: Wed Apr 16, 2008 3:22 pm
Location: Netherlands

Re: Mounting alternator on Major

Post by Emiel »

Hi,

In the USA this might be a good source off inspiration and if necessary parts.

https://www.yesterdaystractors.com/cgi- ... em&r=mcats

Rgds
Best regards

Emiel

N 1937, E27N 1948, 8N 1949, E27N 1950, E1A Diesel 1953, E1ADKN PP 1956, Dexta 1959, NH Clayson M103 1964

Billy26F5
True Blue
Posts: 1009
Joined: Fri Jun 26, 2020 12:01 am
Location: On Billy

Re: Mounting alternator on Major

Post by Billy26F5 »

Emiel wrote:
Sun Nov 28, 2021 8:49 am
Hi,

Maybe you should find a Lucas generator and a control box and wire it up original. Looks decent and works usually well.

These alternators look out of place on a major.

Rgds emiel
I agree 100% Emiel, it will also be easier to fit and get working.
Sandy
ImageImageImage

leeroy
True Blue
Posts: 136
Joined: Thu Dec 08, 2011 11:43 pm
Location: R.I., U.S.A.
Contact:

Re: Mounting alternator on Major

Post by leeroy »

Thanks guys. We buy a lot fro Yesterday's Tractor. Ford 3600, 2120, 8N, 9N as well as an Inernational 340.
But if I was to buy the parts needed it will be over $400 from them, and I'd still need to get a key switch.
Everything from Agriline would be half of that including the correct switch.
At some point I'd love to have her all original, but am going to procure an alternator that is internally regulated and put money into leveling box and drop arms for 3 point hitch. She is also missing the correct drawbar. Using one from our 2120 that we don't need on that tractor.

Post Reply