transmision Repair of a 966 in the far North

[Big Sand Lake Lodge]

14 hours ago, chadd said:

It is retaining the locknut after achieving the 300ft/lbs...  Some tack weld the locknut to the countershaft threads.  On the ones I've done, I drilled a hole through the nut and countershaft (keeping chips from getting in bearing), pounded in a spring pin coated in red loctite, and then peened the ends of the pin over so that it can't come out.

Wow! Many different ways to insure that nut stays in place. Am I understanding correctly that in your method you are drilling the hole at 90' to the counter-shaft completely through the nut and shaft?

Did Big Red ever issue a tech bulletin addressing this issue with their best practice recommendation?

[Jeff-C-IL]

WE rebuilt the trannys on our tractors numerous times, and never did any of the above, just used the normal lock washer where you bent the tab over.   I guess we got lucky.   

In fact, for years we didn't even have the big socket, used a hammer and chisel to loosen and tighten that big nut....got the job done.    Socket is much easier.   Definitely get a impact screwdriver for those staked phillips head screws.  We used to use a #2 screwdriver with a visegrips clamped on real tight.   Twist the visegrips and hit the screwdriver head.....still have that screwdriver--poor mangled thing that it is!   Impact drivers are much easier!

My point is--you CAN get these tractors rebuilt with almost no special tools.  Tools make it easier, but they are so simple and straightforward, that using common sense will likely result in a perfectly adequate rebuild.   I can only remember us borrowing the tool to set the pinion and the ring gear backlash--everything else was basic tools.

[ole 815]

1 hour ago, Big Sand Lake Lodge said:

Wow! Many different ways to insure that nut stays in place. Am I understanding correctly that in your method you are drilling the hole at 90' to the counter-shaft completely through the nut and shaft?

Did Big Red ever issue a tech bulletin addressing this issue with their best practice recommendation?

Here is a video of it. Found this channel on youtube. Guy is doing a Ta job on a 1066. Be the same as your 966.

https://youtu.be/E64cgGlGEck

 

Dont be all worried about the nut being torqued to '300' ft lbs. Get it tight,  heck most are loose and you can move it with your fingers when you go to take them off. Prolly been that way for 1000's of hours and dont come loose and fall off  every tractor. Most times the locking tab holds them from falling off.

The roll pin is easy to do and best way to insure it doesnt fall off along with locking tab.

 

 

[chadd]

6 minutes ago, Big Sand Lake Lodge said:

Wow! Many different ways to insure that nut stays in place. Am I understanding correctly that in your method you are drilling the hole at 90' to the counter-shaft completely through the nut and shaft?

Did Big Red ever issue a tech bulletin addressing this issue with their best practice recommendation?

See below for pictures.  The IH recommendation was to replace the countershaft and nut with left hand threaded versions used in later production.  This was much cheaper and easier.  I didn't come up with the idea, the experts here recommended it.  No special tools required, just a drill and a drill bit.  The pin was from the local hardware store.  Regarding the 300 ft-lbs, you don't need to put a torque wrench on it or anything, just put a cheater bar on the breaker bar and guesstimate it.

 

[Big Sand Lake Lodge]

51 minutes ago, chadd said:

See below for pictures.  The IH recommendation was to replace the countershaft and nut with left hand threaded versions used in later production.  This was much cheaper and easier.  I didn't come up with the idea, the experts here recommended it.  No special tools required, just a drill and a drill bit.  The pin was from the local hardware store.  Regarding the 300 ft-lbs, you don't need to put a torque wrench on it or anything, just put a cheater bar on the breaker bar and guesstimate it.

 

Those are some outstanding pictures. Can see a fingerprint on that nut face. Can't be explained any clearer than that. Thank You. 

[db1486]

I'm gonna be the odd man out here but if I was going to split it to do a ta and have absolutely no use for the ta, I would put the eliminator kit in. We hardly use the ta on our IH's so when the time comes, they get the eliminator. We also never sell anything so dont have to worry about resale value lol. One nice thing is if you need to tow start the tractor it can be done and you pretty much never have to worry about failure again down the road. I find shifting is easier too. Sure it's not much cheaper to do the swap. But that is my opinion, so take it for what it's worth. If it has lasted for you till now since 71, it should be able to last that much longer again.

Good luck on the project! I ain't no fisherman but boy I really would like to check out the northern part of this province some day. Looks like a beautiful spot you got there!

[Owen Aaland]

No point in making sure the countershaft night is tightened to 300 ft/lbs. The gears are a loose fit on the shaft so as you start to use the tractor the pressure on the gears will cause them to move so they and the spacers will wear causing the nut to become loose.

Changes over the life of that transmission system to combat the problem of the nut coming loose included a heavier counter shaft, a left hand threaded countershaft, a thicker nut, thicker walled spacers, and a thrust washer on the front of the shaft. None of these solved the problem, only slowed down the time it took to become loose.

[Nebraska1206]

I've had success with just the original tab washer, the key is to grease the face of the washer that the nut will go up against, so as you tighten up the nut, the washer won't get bound up & turn with the nut, which if that happens, the little tab inside the washer ends up shearing off, and the washer then serves no purpose, and the nut will indeed end up coming off

[MarkG]

Would there be any different concerns with the counter shaft nut or anything else considering the low temps this transmission will see?

this is what I did when I rebuilt the TA in my tractor.

[660 driver]

Hope your project goes well! The old dog is pretty clean yet from the picture you posted. I cant wait to hear how ya come out. My dad flies up to the northern edge of canada to hunt caribou. Says its pretty much tundra where he hunts. I cant remember what the resorts called. He met a guy at cabelas who used to guide up there and thats how he got into it. Hes an IH nut like me and we have a 966 as well. Good luck to you sir! As been said they are easy to work on compared to new stuff.

[Big Sand Lake Lodge]

On 6/26/2020 at 11:18 PM, 660 driver said:

Hope your project goes well! The old dog is pretty clean yet from the picture you posted. I cant wait to hear how ya come out. My dad flies up to the northern edge of canada to hunt caribou. Says its pretty much tundra where he hunts. I cant remember what the resorts called. He met a guy at cabelas who used to guide up there and thats how he got into it. Hes an IH nut like me and we have a 966 as well. Good luck to you sir! As been said they are easy to work on compared to new stuff.

Thank you for the support and kind words. I will keep this post up to date no matter how long it takes to complete the project.

Your dads hunt is just a bit farther north of us. We are just south of the tree line. I won't drop competitors names here, wink,wink. Sad to say that the condition of the Caribou herds have been in major decline for a while now. Numbers in the hundreds of thousands have dwindled to tens of thousands. We still see Caribou sign but the migratory path they take has changed over the last few years to the north of us. But our Moose, Black Bear and Wolf populations have been thriving and growing every year. The Moose harvested during our season supports the community with much needed protein for the year and is distributed to the entire population.

[iowaboy1965]

On 6/26/2020 at 7:32 AM, Big Sand Lake Lodge said:

a past life I used to work for a company that had their headquarters in Newton, Ia

Interesting.......

[Jeff-C-IL]

Caribou have been declining, black bear and wolf population thriving....HMMMMM.....

[acem]

I have had two nuts back off and I have a 1486 in the yard I bought cheap with one. It can cause some damage but the worst thing is having to split the tractor again.

Beautiful place. I'll come help you if you'll pay for my trip!

Thx-Ace 

[Big Sand Lake Lodge]

17 hours ago, Jeff-C-IL said:

Caribou have been declining, black bear and wolf population thriving....HMMMMM.....

One of our furry friends left his mark. And I am not a small man.

[ole 815]

On 6/26/2020 at 7:32 AM, Big Sand Lake Lodge said:

Yes, yes, yes. I am so interested. So interested that I might jump on the bike and knock on your shop door! You wouldn't be the guy that has a row of every model of Big Red parked along the road in front of his place would you?

Dang, I'm also very envious. Big beautiful out of the weather shop. Hard, smooth, level shop floor. Rolling gantry crane at the ready. No fair I cry,, no fair. Just kidding. You are blessed.

In a past life I used to work for a company that had their headquarters in Newton, IA.

Thought you might like a few pics....see what your gonna get yourself into

[acem]

This clutch job is pretty easy. The ta job complicates it significantly. Thx-Ace 

[Big Sand Lake Lodge]

We're back. Finally north of the border and at the lodge.

Now to pick up where we left off. We have boxes and boxes of parts that were ordered and stored oh so long ago.

Tearing a boat dock apart to get the lumber to make a platform so we can saw the ole magician assistant in two. Or thirds in this case.

Will post pics and update the progress. As time permits. Still got a lodge to get ready for Moose hunters.

[vtfireman85]

Following along 

[Tmtbob]

Glad I found this thread

[hardtail]

Took a long time to get up there, good part is bugs might be declining

Calling for first frost tonight 

[mrfred54]

Keep us posted, we will try to keep giving you words of wisdom. Wishing you all the luck😀

[nepoweshiekfarmalls]

Glad to hear you are back up there at work!

[Pid 1831]

Following this.

One of the most interesting  topics fir a while.

[Jeff-C-IL]

I agree.   Unfortunately, no news.   Either the internet is down or the wolf population got too bad......