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Farmall & IHC Tractors Discussion Forum
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756 t/a

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scot_c

04-06-2005 19:26:47




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low torque slips on the 756 when shifting it under power, it works fine when using it to slow the tractor. Noticed it wasn't lifting the little piston clear up on the MCV so I moved the linkage to do that and no change. My uncle uses it for planting and slows down for turns with the t/a so I'm thinking it must be ready to just let go?




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the tractor vet

04-07-2005 08:22:26




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 Re: 756 t/a in reply to scot_c, 04-06-2005 19:26:47  
Using the T/A as a way to slow down is the hardest on the low side and this is the #1 cause for taking the low side out . The proper spool valve adjustment is that the snap ring on the stem must touch the nut on the bottom stroke and must travel the full lenght on the up stroke . But since you have been using it to slow down over the years ya got the sprag wore out and the T/A assy. will need to be replaced . If you must slow down and keep the rpm's up at the head lands then use the brakes to load the tractor before ya pull the T/A into the low side and this will help make the T/A last a lot longer .

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Allan in NE

04-07-2005 08:49:13




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 Re: 756 t/a in reply to the tractor vet, 04-07-2005 08:22:26  
Doc,

Don't think so. That one just ain't a gonna wash, ol' Buddy. :>)

Every farmer who has ever owned a Farmall with a T/A uses 'em to slow at the endrow and I can tell you they will last forever used in this fashion. Doesn't hurt 'em one little bit.

Now, if you're talking about whizzin' down a hill in road gear with a heavy load pushin' on the back, that's another story. :>)

Allan

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the tractor vet

04-07-2005 09:48:47




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 Re: 756 t/a in reply to Allan in NE, 04-07-2005 08:49:13  
Ah Allen , you are wrong on that one , If ya doubt me on this Give Al a call at Hy Capacity and have a long talk with him and give my buddy Doug a call and ask him when the T/A went out on his 886 or John boy when the T/A went out on his 966 as he used it to slow down with two gravity boxes loaded with shelled corn . Remember i have done a lot of T/A's over the years . One because i did them for less then the dealers charged and two because i bought loads after load of I H's that had the T/A's out and fixed them and sold them . It is fact that when farming was big in this area we had at one time 6 I H dealers in a thirty mile radius and with all of them i have bought and sold more 706-1066 then they all did .

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Allan in NE

04-07-2005 10:45:45




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 Re: 756 t/a in reply to the tractor vet, 04-07-2005 09:48:47  
Comon' now,

Let's see. Over here on the left we have the T/A lever; forward is the high side and back is the low side. But, be darned sure ya never, ever pull the lever back 'cause it will ruin the T/A.

Sorry, I ain't buyin' it, Doc. Too many acres, too many Farmalls and too darned many years under my belt to listen to that tale.

Aside from the practice of using the T/A as a "brake", what you're saying doesn't even make sense. Farmers everywhere use the thing to slow at the end of the field. Comparatively, very, very few of them ever have T/A problems.

Going to the low side at the end row is not using it as a brake; it is just dropping the tractor down into reduction. Use the darned thing; that's what it is there for.

I guess maybe we'll have to agree to disagree on this one. :>)

Allan

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the tractor vet

04-07-2005 11:48:06




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 Re: 756 t/a in reply to Allan in NE, 04-07-2005 10:45:45  
As long as there is a drag on it it is not the problem but to many guys try and do this at road speed . Now i don't know how old you are but i know how long i have twisted wrench and i don't have other people fixen my tractors . I made it a point to get good at what i do and that is why i am vary good and if i don't know something then i find out from more then one scorse . when it comes to the farmalls from the letter seires to the 86 seires i have been thru every inch of them and at one time or other had every nut and bolt out of them . And just like the Older Ford and Mo Pars now as for the Deeres and other brands and Cheveys i have worked on them but by no means and expert on them . But what i am good at i am vary good . Now i don't want to make ya mad at me but just how many T/A's have you done yourself ? and have you ever rebuilt a Hdy T/A and looked at the way it was made then you would know that the high side is built heavier then the low side on a Sd. and when they started adding and extra clutch to the low side it helped but the sprag is still about the same . And a lot has to do with maintance on the tractor and i am not just talken about changing the oils and filters and greasen it , like keeping all the linkage in adjustment . Like most shifting problems on the T/A equiped tractors is caused by linkage ware and getting out of adjustment and some times going by the book still des not help because of ware . Some times i am to easy and give out information to help a guy out when i should be like a doctor and tell ya to take two asprin and call me in the morning and send ya a bill then have ya bring it in and charge ya to fix it. I wore out three pick ups running all over seven countys and four differant deales fixen tractors . and it looken like i am going to be going back to it . And i did not travel over three states buying up special service tools to do a half rate job like some do . Just how many people do you know that have the propper test equipment to test and service Hdy. systems . Go and price a Flow Rater . and yes i need to find the last pice for mine to do the PFC systems but i will get one and one of these days i'll have a Bacarack injection pump stand . I get tired of running 60 mile to get a pump done.

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Allan in NE

04-07-2005 12:35:48




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 Re: 756 t/a in reply to the tractor vet, 04-07-2005 11:48:06  
Doc,

I am not dusputing what you say; you absolutely know your stuff that is for sure. Heck, that's not hard to figure out; anyone can tell that fact.

What I'm saying is that you are looking at this and giving advice from the business end of a wrench. That's like me telling you never to turn your thermostat down 'cause someday it won't work anymore.

You only see the bad T/As, the broken ones. You don't see the good ones. Why should you? They work okay.

But, there are a thousand times more good T/As out there than there are bad ones. Bad T/As aren't the big "boogey-man" everyone makes them out to be. Broken T/As are the exception, not the rule.

I, on the other hand and from an operator's point of view, am telling you that yankin' that stick back at the end of the field does not hurt that T/A one little bit. If it did, I'm the joker who would have experienced it, that's for sure. Irrigated rowcrop is not easy on a tractor.

It is what the system was designed to do; drop the darned tractor into reduction.

For what it is worth, I'm 60 years old and just cannot believe I've experienced just pure, plain "luck" in all the millions of times I've pulled that stick back over the years ever since the days of the 400D.

Could be wrong tho, it is still fairly early in the day. :>)

Allan

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scot_c

04-07-2005 14:47:53




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 Re: 756 t/a in reply to Allan in NE, 04-07-2005 12:35:48  
I don't think i've ever started this before. IT didn't act up much till someone used the tractor to refill the cylinders and hyd. hoses on our dump wagon then the t/a pretty well quit working under load. I'll have to adjust that snap ring back down. It's on a spreader that it shouldn't be on right now and it would help to have the t/a working but as long as we keep our rookies off it we'll be ok. My uncle plants with this one and slows at the feild end with the t/a because the hydraulics are a little slow, being original pumps and all. I'm sure this tractor's been down for trans or rearend work but I can't ever remember anything but an engine and a clutch in my 24 years. It's my uncles baby and he is kinda selective about who drives it doing what.

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