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Ford Tractors Discussion Forum
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SOS / PTO

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bigtom3993

09-14-2019 13:30:00




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I have a Ford 801 tractor that has the back hoe attachment on the back and bucket on The front , back hoe is ran by PTO pump on the rear , front bucket runs off tractor hydraulic, I had the tractor in first gear and was lowering the front bucket at the same time and then the tractor stopped moving, it did happen before and I raised and lowered the front bucket and the tractor would move again , I tried that trick again but no luck this time , I checked out further and not only will the tractor not move in any gear but the back hoe pump does not work that is attached to the PTO , does anyone have any ideas on what I can do ?

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bigtom3993

09-22-2019 06:23:02




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 Re: SOS / PTO in reply to bigtom3993, 09-14-2019 13:30:00  
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I have to roll the front , the back hoe attachment is still on the rear lol



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showcrop

09-21-2019 17:13:11




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 Re: SOS / PTO in reply to bigtom3993, 09-14-2019 13:30:00  
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You tap wooden wedges in the front above the axle on each side so that the front part of the tractor can't pivot at the front axle pin when you get it disconnected from the rear. Block the front don't roll it. Roll the rear. It rolls much more easily than the front. Support the rear with the HoboNC splitting support jack.



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bigtom3993

09-21-2019 13:26:35




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 Re: SOS / PTO in reply to bigtom3993, 09-14-2019 13:30:00  
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showcrop

09-21-2019 10:47:12




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 Re: SOS / PTO in reply to bigtom3993, 09-14-2019 13:30:00  
Big Tom, SOS mechanics go by factory manuals and specs and tests not by what they "Feel and think".
I tried pulling it out with my fingers but it would not move , I feel it should because there is a spring on it , I think it has something to do with the PTO but not sure ,



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bigtom3993

09-21-2019 10:36:15




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 Re: SOS / PTO in reply to bigtom3993, 09-14-2019 13:30:00  
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Sean in PA

09-21-2019 10:23:27




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 Re: SOS / PTO in reply to bigtom3993, 09-14-2019 13:30:00  
871 is the model number. It is a model within the 801 series. All tractors in the 801 series had the general purpose ag chassis and the172 ci gas or diesel engine. Most of the diesel models have a "D" suffix after the stamped model number. The 871 had the S-O-S transmission and the single speed 540 rpm independent PTO.

137062 is the tractor serial number. That is a 1961 serial number.

312259 is the casting code for the transmission housing. That was the casting code for the original S-O-S transmission in the '01 series that had the over running clutch. A lot of them have been replaced with the later Direct Drive Clutch version, but there are still some out there with the original ORC.

There is a date code below the casting number, which looks like A149. I don't know if that is the date that particular housing was cast or if it is the date the transmission was assembled, but I believe A149 means January 14, 1969.

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bigtom3993

09-21-2019 09:39:57




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 Re: SOS / PTO in reply to bigtom3993, 09-14-2019 13:30:00  
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Can you possibly tell me anything about the serial numbers in the photos I just attached I m trying to split the tractor apart and I found these just now



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Larry NCKS

09-15-2019 20:10:37




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 Re: SOS / PTO in reply to bigtom3993, 09-14-2019 13:30:00  
Sorry! I can't answer that question. But I can tell you that if you end up needing an input shaft, you'll either need to remove the hoe or the transmission in order to stand it on its tail.
If you remove the input shaft without doing this or wedging the assembly tight, you'll drop a thrust washer and need to do a complete transmission disassembly to get it back in place.



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bigtom3993

09-15-2019 19:33:06




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 Re: SOS / PTO in reply to bigtom3993, 09-14-2019 13:30:00  
I hate to ask but I cannot locate it does anyone know if there is a place here in the forum s in the archives or something like an aid me in breaking this tractor a part ?



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Sean in PA

09-15-2019 19:03:51




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 Re: SOS / PTO in reply to bigtom3993, 09-14-2019 13:30:00  
Yes, the torque limiting clutch and input shaft are accessed by splitting between the engine and transmission.



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bigtom3993

09-15-2019 18:59:05




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 Re: SOS / PTO in reply to bigtom3993, 09-14-2019 13:30:00  
[quote="Sean in PA"](reply to post at 18:52:01 09/15/19) [/quote

You are very correct, I am starting to remove the bucket from the front, hopefully I will not need to remove the back hoe also lol then try to split it , but I am hoping to split at where the motor connects to the tranny , am I correct ? I have split a 8-n , Hope this is as simple lol



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Sean in PA

09-15-2019 18:52:01




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 Re: SOS / PTO in reply to bigtom3993, 09-14-2019 13:30:00  
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So the diagnosis by Bern, which was reinforced by Larry, was correct, and you'll be splitting the tractor to replace the torque limiting clutch and/or input shaft due to stripped splines. That was pretty much the only logical diagnoses from your original description of your symptoms.

It's almost comical how much effort people go through to try to go the "easy route" when the people here who have decades of experience try to help them with advice that they need to do some major work on their tractor, and they end up needing to do the split anyway.

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bigtom3993

09-15-2019 17:35:39




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 Re: SOS / PTO in reply to bigtom3993, 09-14-2019 13:30:00  
And with the top of the transmission cover off I started the tractor up and nothing turned inside the transmission at all



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Larry NCKS

09-15-2019 16:15:26




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 Re: SOS / PTO in reply to bigtom3993, 09-14-2019 13:30:00  
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Oh. heavens!



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bigtom3993

09-15-2019 13:09:33




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 Re: SOS / PTO in reply to bigtom3993, 09-14-2019 13:30:00  
No the way I did it I can put everything back on without any problem I made sure to measure my cable everything just like I had read here in the forum



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Sean in PA

09-15-2019 12:52:12




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 Re: SOS / PTO in reply to bigtom3993, 09-14-2019 13:30:00  
Did you remove the top cover without following the procedures in the service manual? If so you may have already caused yourself more time and money than necessary.



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bigtom3993

09-15-2019 11:31:40




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 Re: SOS / PTO in reply to bigtom3993, 09-14-2019 13:30:00  
I pulled the top cover off because in an older post with the similar problem the gentleman was told to pull it off and check the clutch plunger to make sure it was working correctly and not stuck , That was the only reason why I pulled it off as you can tell with the pictures I have not only the Bacot attachment on the tracker but the front bucket also and I was hoping to not have to remove them to separate the tractor so I was shooting for any hole in the dark that I could fine

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Bern

09-15-2019 11:58:10




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 Re: SOS / PTO in reply to bigtom3993, 09-15-2019 11:31:40  
I would suggest that you stop shooting in the dark and find yourself a service manual. After you read it and get a sense of what's going on inside, start with a pressure check first thing.

The irony is that now you will most likely need that manual to successfully put that cover back on. It's not an easy job for a first timer to get the PTO and shift cables adjusted properly.



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bigtom3993

09-15-2019 08:38:13




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 Re: SOS / PTO in reply to bigtom3993, 09-14-2019 13:30:00  



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bigtom3993

09-15-2019 08:35:39




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 Re: SOS / PTO in reply to bigtom3993, 09-14-2019 13:30:00  



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bigtom3993

09-15-2019 08:33:20




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 Re: SOS / PTO in reply to bigtom3993, 09-14-2019 13:30:00  



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bigtom3993

09-15-2019 08:24:59




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 Re: SOS / PTO in reply to bigtom3993, 09-14-2019 13:30:00  
Quoting Removed, click Modern View to see[img][/img]

I removed the top cover from the transmission and seen two pistons, one works great when the clutch is worked , the other does not move at all , I tried pushing it in but it will not go in then I tried pulling it out with my fingers but it would not move , I feel it should because there is a spring on it , I think it has something to do with the PTO but not sure , then I started the tractor up and it still did not move , and another thing , I see no fluid at all in the cavity, should there be some There ? I am trying to post a picture but am having trouble doing that also lol

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Bern

09-15-2019 10:22:11




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 Re: SOS / PTO in reply to bigtom3993, 09-15-2019 08:24:59  
No fluid = no pump. No pump = stripped splines.



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Ultradog MN

09-15-2019 10:18:30




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 Re: SOS / PTO in reply to bigtom3993, 09-15-2019 08:24:59  
I'm no SOS man but am wondering why you would pull the top cover off.
If I remember correctly there is nothing under there that is related to your problem.
I have helped replace the input shaft and torque limiting clutch on a couple of those transmissions and we did not have to pull that cover.
I'm thinking if you don't have a manual for that transmission you really should get one before you open it any further.

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Larry NCKS

09-15-2019 06:07:27




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 Re: SOS / PTO in reply to bigtom3993, 09-14-2019 13:30:00  
Your email appears to be open in modern view as well.



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Kirk-nj

09-15-2019 03:01:26




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 Re: SOS / PTO in reply to bigtom3993, 09-14-2019 13:30:00  
Probably have the SOS parts you need.My email is open in classic veiw



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bigtom3993

09-14-2019 16:19:39




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 Re: SOS / PTO in reply to bigtom3993, 09-14-2019 13:30:00  
Is there any place here that can show me step-by-step how to split the tractor and repair what you say is damaged ?



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Bern

09-14-2019 17:33:51




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 Re: SOS / PTO in reply to bigtom3993, 09-14-2019 16:19:39  
You could search the archives here for some of the info you need - good luck with the search feature on this site. Nobody I know is going to type out explicit, step-by-step instructions to replace an input shaft in a SOS transmission. That's what repair manuals are for.



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Dean

09-14-2019 17:31:02




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 Re: SOS / PTO in reply to bigtom3993, 09-14-2019 16:19:39  
Yes.

You will need to acquire the proper Ford service manual.

These are available online.

Dean



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Sean in PA

09-14-2019 16:12:50




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 Re: SOS / PTO in reply to bigtom3993, 09-14-2019 13:30:00  
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Yes, if the loader is run off of the tractor's 3 point hydraulics as you said, because that pump is driven directly of the rear of the engine and would not be affected by the transmission input not getting powered, but the transmission itself and the PTO would be affected.



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bigtom3993

09-14-2019 15:49:23




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 Re: SOS / PTO in reply to bigtom3993, 09-14-2019 13:30:00  
But would the hydraulics on the bucket still work on the front if that was so ?



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Larry NCKS

09-14-2019 14:50:23




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 Re: SOS / PTO in reply to bigtom3993, 09-14-2019 13:30:00  
What Bern said x2!



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Bern

09-14-2019 13:46:56




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 Re: SOS / PTO in reply to bigtom3993, 09-14-2019 13:30:00  
You have stripped splines on the input shaft and/or torque limiting disc in the flywheel. Confirm by performing a pressure check. Zero or very low oil pressure would pretty much verify this.

Torque limiting disc is replaced with a front transmission split. Input shaft is a little more difficult, and would require either a complete trans disassembly or else standing the nose up in the air. This job would be best farmed out if you have limited mechanical skills.

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