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TA?

Just a little tidbit of information on the TA. There are two kinds of TA's-the one that's out and the one that's going out! Jim
 
Poppy11: It's Torque Amplifier, and was International's way of allowing you to shift down without putting in the clutch. Basically, you pull the TA handle and the tractor shifts to a gear about midway between the gear you're in and the next lower one without you having to use the clutch--handy during a hard pull or where you need a slightly different speed to match ground conditions. They can be finicky to adjust and maintain, and you'll often see IH tractors advertised as having "no high TA" or "no low TA" depending on which side has quit working. This isn't intended to be a total coverage of the subject (the care and feeding of TA's is one of the most-extensively covered topics of IH maintenance, with LOTS of widely varying opinions and suggestions!) but hopefully this will at least give you a quick primer.
 
I always heard the average life of a properly used TA was about 3,000 hours.

The operative phrase is "properly used". And it's the opposite of what most people's instincts tell them. It operates on the same principal as an automatic transmission, with wet clutch discs. Therefore, the slower the lever is moved, the more time the discs slip, hence more wear. It's actually the easiest on the TA if you shove the lever back and forth like you were p----d off at it. Think high performance shift kits in automatic transmissions. There's a reason they slam when they shift.

A friend of mine who used to have an independent tractor and machinery repair shop told me once about a customer that brought in a 966 Farmall with 900 total hours and the TA out. The customer said, "I can't see why it went out this soon, when I used it I moved the lever as slow and easy as I could".

My friend had to break the news to the customer that that's the absolute worst way to treat a TA.

BTW, this particular friend was one of the few people in the area who would touch a Ford Select-O-Speed--and he was a genius with them.
 
It's just not a good idea at all to pull them in to low unless they are under load. If they aren't,yes,the discs will spin against each other.
One auctioneer here absolutely will not sell an IH tractor with the claim that the TA works.
 
Just like people. Alive or dead. The alive ones are getting dead. Properly used and adjusted every year (ten minutes at best) they last more than 3000 hrs with serious use. Our 350U has had two engine rebuilds and still has the original TA (and it works) People who make seriously wrong choices in life are also short lived, others live to be 100. Jim
 
My 1086 has had several through it's 15000 hour life and I've done, or not done, everything I have heard of to try to make it last longer. Oil changes yearly, not pulling it back to use it as a brake, not pulling it for very long in under drive, and on and on. I've even heaard that pulling wagons over rough ground in underdrive will take the TA out from the jerking on the spragues.

Three thousand hours is about all it'll do. Even the supposed 'lifetime' TA they offered for awhile didn't last. I've joked about beating the crap out of the next one so it'll go out under warranty. With my luck it'll go out a few months out of warranty. The mechanics that do the replacements are very competent, experienced lifetime IH mechanics.

Now that it's a loader tractor I just leave the TA in direct drive. Jim
 
Don't know about the 966, but with an 86 series TA there is no way to ease it in and out. You pull the lever so far and it goes over center real quick and shifts fast. Jim
 
The very late TA's had a solenoid vlave to shift the TA, the lever only operated a snap action switch, so every shift was a bang shift to increase "direct" clutch life.
 
There are two kinds of engines, those that have been overhauled and those that will be.

My 1086 with 10,000 hours is on it's second TA.

First lasted 3000 second one still going.The last 10 years it has been under a loader.I use the TA all the time.

460 had the original when it burned up at 9000 hours a few years ago.

856 with 8000 hours still has the original. Dad bought that one new.

I have another 1086 with 4000 hours and had the ta replaced at 2000 hours.

So I guess you just never know.

Gary
 
I have a 966 with an M&W turbo, it runs about 140 hp. The tractor currently has over 12000 hrs. on with original TA. I don't baby it, and never have. I have to guess you are not shifting it properly, possibly using it to downshift/decellerate under load. Anything will wear out, some people break things. Wayne
 
Makes sense in the interest of preservation.

Most of my info came from an 856 and 1066. I rented a 1086 once in a particular situation, but since the TA worked like it was supposed to I didn't pay much attention to it.
 
The electric shift TA was on the late 60 series 2+2 tractors, like the 6788, possibly all late production IH.
 
Thats correct, my 6788 has the electric shift TA, works great...7000 hours and as far as I know it's original.
 
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