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Tractor Talk Discussion Forum

Ford 971 SOS Diesel

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Jim Menke

01-10-2007 15:50:52




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I am thinking of purchasing one that has been restored. It has been in the same family since new. I have not been able to find much information on these which is a little scarey. I have a 51 8N and I can find all the information that I want.
Is this a reliable tractor to buy. I know it depends on the condition of it now, but in general are they good or to be avoide.

Thanks in advance for your input!

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TomTX

01-11-2007 06:52:49




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 Re: Ford 971 SOS Diesel in reply to Jim Menke, 01-10-2007 15:50:52  
Post on Ford Board, you will get expert advice. The SOS is a great tractor, but take a self test and see if YOU are right for the SOS. If you are the kind of guy who buys Operator Manual, Repair Manual, Parts Manual in original brand of tractor; uses name-brand lubricants, follows strict maintenance program, versus "repair" program, uses OEM parts. then SOS if fine for you. If you use Wally World lubricants, try to use IT manuals, believe "if it aint broke dont fix it", ignore maintenance, then stay away from the SOS. Tom

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Jim Menke

01-11-2007 06:55:30




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 Re: Ford 971 SOS Diesel in reply to TomTX, 01-11-2007 06:52:49  
Thanks. I am probabley somewhere in the middle.



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old

01-10-2007 16:27:54




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 Re: Ford 971 SOS Diesel in reply to Jim Menke, 01-10-2007 15:50:52  
The SOS tranny as long as working good are ok, but if you don't do the TLC that is needed on them they can/will become a money pit. In my area one with an SOS will bring less then half that of a tractor in the same series but with the 4 or 5 speed.



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Jim Menke

01-10-2007 16:31:29




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 Re: Ford 971 SOS Diesel in reply to old, 01-10-2007 16:27:54  
This tractor has been in the same family since new and has always been in the garage.
Is the tlc hard to do or just normal stuff?



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old

01-10-2007 18:35:04




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 Re: Ford 971 SOS Diesel in reply to Jim Menke, 01-10-2007 16:31:29  
Well on the SOS tranny its more then normal or at least in my book it is. Adjustments have to be done when they should be done and as the book says they need to be done. One time with out the fluid changed when it should be can end up with a $2000 tranny rebuild from what I know about them. I've turned down a good number of tractors with the SOS even though I could have got them for $100-200.



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ErnieDD

01-10-2007 18:11:20




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 Re: Ford 971 SOS Diesel in reply to Jim Menke, 01-10-2007 16:31:29  
The tranmission fluid changes must be done and the planatary brake bands adjusted by the book. If the machine was used in loader work the torque reversals can tear up the splines and rivets in the torque converter.

Do a search on selecto speed and sos in the upper right hand corner.

As far as the diesel is concerned you do want to get one with the crankshaft counter balancers. The early ones were without. Grinding the crank is not an option on overhauls, they tend to break, more so with out the balancer.

We had a 851 gasser, and what a beast it was, for its size. Went over 9000 hours without a major overhaul. Chopped corn and baled hay for 10 years. Great little tractor. Diamond in the serial number indicates it has sleeves.

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Jim Menke

01-10-2007 18:47:52




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 Re: Ford 971 SOS Diesel in reply to ErnieDD, 01-10-2007 18:11:20  
According to the owner it was purchased to cut grass...bush hog. I am going to give them a call tomorrow and ask them about the maintenance that was or was not performed.

Thanks for the help!



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Billy NY

01-10-2007 20:19:33




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 Re: Ford 971 SOS Diesel in reply to Jim Menke, 01-10-2007 18:47:52  
A Select-O-Speed as you describe, one owner, taken care of, and not running up heavy usage hours, ought to be worthy of consideration. I can't tell you much about the innards, but I can tell you the hours I spent on our '64 4000 with an S-O-S, it was a great utility tractor, and it had been on a NYS thruway mowing fleet before it came to our Ford dealership. We did not see a lot of those S-0-S's mostly the post '65 blue thousand series as they were new at the time with 8 spd's, and they turned out to be quite reliable.


I would think that if you were to get the service manual for that model, check the adjustments, also check the filter and fluid, and get some advice from someone who knows the innards on these, this particular one might not be a bad one to consider. Makes sure to use the correct fluid if you do go for it.


It was a shame what happened to ours, someone changed the fluid and replaced it with the wrong type, and I was the last to run it, unbeknownst to me what happened. It was worth more than the tractor to fix so it got sidelined and we had no tractor after that, for me, it was disheartening, I always kept the fields cut and looking nice, place went to pot after that, money was tight I guess. Ask on the Ford board as well, there are some fans of these who know them well. Grew up on that one, baled raked, brush hogged, plowed snow, 2 bottom and discs, side sickle bar, you name it that tractor did it, and it had the right gear for whatever you needed. Even baling, it would eat up a solid windrow no problem, and cutting was no problem, I can recall cutting some large hay fields with it, they now have homes on them. I did not know much about these then or now, way too young and I recall my father keeping up on the maintenance, and it served us well, I'd own one again, and was a great one to learn on, that other green 2010 we had was a scary thing to run on the hills, always went for the Ford everytime, just felt a lot safer on it because of the hills, plus it had the independent PTO, can recall bogging down in heavy birdox, just push in the inching clutch and let er clear out and let off and proceed forward, even all the years later, still can't get used to the 850 because of that, + it had power steering and 1 set of remotes, was a great little tractor in my book.

The stigma about them was when they first came out, was '59 or so, our mechanics at the dealership knew about them and we had a counter loaded with manuals, the place had been in business for 40+ years, there were some issues at the beginning from what they said, but once they were resolved years later, it was a good performer, many people will disagree because they were released too soon, not enough proving ground time. If you don't do the prescribed maintenance, adjustments etc, it's like anything else, we had 3 brothers who worked for us and they were old school, and knew these Fords, they were there way before we owned it, and knew those N's to 1000's inside and out, they did everything in that shop, besides all service and repairs, including the scant few S-O-S's that did come in. One of the first ones I saw them work on was a 6000 Commander, odd looking Ford, hard on the eyes too ! I remember the diagrams, way to much for a youngster to deal with. They have long since passed on, great place to have grown up though, those were the days.

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Jim Menke

01-11-2007 07:02:34




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 Re: Ford 971 SOS Diesel in reply to Billy NY, 01-10-2007 20:19:33  
I believe that this one may be a 59. I will talk to them and try to get a feel for what they did to the tractor on a regular basis.

Thanks,

Jim



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Touched a nerve.

01-11-2007 05:01:06




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 Re: Ford 971 SOS Diesel in reply to Billy NY, 01-10-2007 20:19:33  
Anytime you mention S.O.S tranny the first thing anybody comments is always negative. Why is that?
Most of the comments don't seemed based on fact, just heresay...

It's true there were problems with them when new, but that was over 50 years ago. Maybe it's conceivable to say, "stay away from the '59 and 60 model years" then to lump ALL S.O.S equipped tractors in. I'm not sure that's even fair, as I'd have to think that most of the problems encountered then were fixed.

As for the tractor in question, the fact that it was one family owned is enough for me. Even so, just being 1 owner doesn't mean it's had regular service. It probably needs some maintenance (TLC), but then what 50 year old tractor doesn't?I would check it out like any old tractor. If it all works and the price is right whats the problem?

I'd love to have a 971 diesel to park along side my 871 diesel!

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