871 PTO shaft

Tiger Joe

Member
Is the 871 PTO shaft the same as the 4 and 5 speed transmissions?

Made a thread awhile back about the PTO leaking on our 871. Tried 2 seals and it keeps leaking no matter what. Thinking of trying a whole new shaft this time.

I looked in the I&T manual and I swear it said the 871 is the same as the normal gear tractors, just the 881 was different. But if found some conflicting info online. Some say the same, some say 4 and 5 speed only NOT selectospeed.

Can anyone confirm for me they are the same?
 
The PTO shaft from a 871 will not work on a 841 or 851. The shaft from a 871 is shorter. As to your problem. The seal is the same on either installation..Does it leak between the shaft and the sleeve? the sleeve and the seal? the seal and the housing? or maybe even the gasket between the PTO housing and the center housing? You probably need to get a closer look at the situation
 
(quoted from post at 21:14:36 03/17/19)
Yep! You could look this up on NH parts website as easily as we can. However, they appear to be the same.

I want to change my answer. They are not the same as Wayne noted.


However, there is a sleeve on the SOS PTO shaft that should be replaceable. It appears to fit the shaft where the seal would hit. It is part # 83964336 Cost is $24.50 at my Ford (NH) dealer. Your cost may vary.
 
huh, so everyone telling me to go look it up and its the wrong info. if anyone actually read my first post, i said i am getting conflicting info from different sources which is why i came here to ask.

Messicks lists 2 different shafts- single and dual speed PTO. thats it. I didnt see anywhere that listed separate shafts for geared trans vs selectospeed. I checked several other vendors, and most of them just list 1 shaft for all, BUT there was 1 that specifically said "does not fit selectospeed"


now, here is my issue with the leak- tractor worked fine no leak for 2 years (my ownership). one day PTO randomly starts leaking. so we change the seal. worked until first time we used it, then started leaking again. next time we changed everthing thinking bearing might be bad taking out new seal- seal,sleeve,bearing, gasket. same thing again- leak stopped until we used it again.

the tractor is out in my buidling so I would need to look at it, but from my memory, the fluid appears to be coming right out the PTO shaft.

this is the kit I ordered:
https://www.ebay.com/itm/314267-E7N...f1370a7:g:NT4AAOSwSRVamCo9&frcectupt=true
 
Messicks lists 2 different shafts- single and dual speed PTO. thats it.

Sorry, we assumed that you knew what an 871 tractor is. It is an 801 series tractor with a Select-O-Speed transmission and a single speed PTO. The model in the 801 series that had the S-O-S and the dual speed PTO was the 881.
 
(quoted from post at 08:30:32 03/18/19)
Messicks lists 2 different shafts- single and dual speed PTO. thats it.

Sorry, we assumed that you knew what an 871 tractor is. It is an 801 series tractor with a Select-O-Speed transmission and a single speed PTO. The model in the 801 series that had the S-O-S and the dual speed PTO was the 881.

sean i know what tractor I have. please read the very next sentence of my post- [b:a6cdb68a2f]I didnt see anywhere that listed separate shafts for geared trans vs selectospeed.[/b:a6cdb68a2f]

When i looked up 861 and also MY 871, the section on the PTO looks the same to me.
 
If you are on the NH parts page website. Transmissions, and single speed PTO (59 and up . This knowledge has to be known before we can get to the proper parts .The tractor model number, stamped on the transmission, should tell you that.
 
well I think part of the problem is the messick site doesnt work very well on an ipad. it is far more user friendly on an actual pc.

so i did some more digging now that im on a PC, and it looks like i did find 2 different part numbers

looks like the geared tractors take 310091 and the 871 takes 312109. I'm going to take a guess the selectospeed shaft is probably pretty rare. might have to try a new sleeve and seal again
 
The silly thing is that if you look up the drawings for the 841 it will show you the 4 speed AND the S-O-S parts, and the 851 & 861 drawings will show the 5 speed AND the S-O-S parts, but if you look up the drawings for the 871 or 881 it will only give you the parts for the S-O-S trans.

The gear model tractors can take either the regular 1-3/8 shaft, part number 310091 or the heavy duty heat treated shaft, part number 312428.

You are correct that the one that you want for your 871 is part number 312109.
 

thats what threw me off- especially last night on my ipad- was when i started by looking up the 871. when i went to cross check and looked up the 861, I found the same thing- because i didnt move to a different section.

I am going to guess the 871 shaft is made of unobtainium, so i may have to try another seal and sleeve on my current shaft to see if it stops leaking.
 

Joe,

"huh, so everyone telling me to go look it up and its the wrong info. if anyone actually read my first post, i said i am getting conflicting info from different sources which is why i came here to ask."


The consequences for giving wrong answers here are minimal and many are given. In addition it is very evident that many answers are given after reading just a few lines of an original question post. When it comes to correctly using parts pages while depending on a sketchy model ID, many here will make the decision to avoid the chance of a mix-up that could result in a wrong answer potentially causing a major headache for the OP.
 

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