86 series ta's vs 66 series ta's

Grant boyIN1985 · Mar 28, 2012

Howdy everyone,

I had posted on the tractor talk section last about looking for a tractor to chisel with and on the list i think i had some 66 series tractors. After looking around locally I can find 86 series IH's easier. I had remembered reading different places where the 66 series T/A was better than 86 series and vice versa. So is there any merit to any that? I'm considering going to look at a 1586 that suppossedly only has about 2500 hrs. Just wondering which series I'd be better off with? I know previous owner care and maintenance has alot to do with the tractors condition but didn't know if one series was definitley better than the other?

Thanks for any light you guys could shed on this

ND856 · Mar 28, 2012

Just remember to take into account the 15's have 4 speeds fewer forward (with TA) than 10's & 14's

mazemeister · Mar 28, 2012

i'm about 99% sure every "large frame" IH from the 706 up to at least 1486 (maybe 15s too?) used exactly the same TA unit.

that being said, there are differences in replacements- HD versions with more clutch disks etc.

the tractor vet · Mar 28, 2012

Nope none , the T/A unit is basically the same from the 706 on up thru the 1486 and maybe the 15's but myself i have never been into a 15 and to lazy to get the book out to check.

Anonymous-0 · Mar 28, 2012

Having worked a lot of ground with both series I prefer the older 66 style levers. I believe they did provide a more smooth shift by the action of the lever.

Anonymous-0 · Mar 28, 2012

73935C91 is the part number of the IH/CNH sprag that fits 706 thru 1586 & 2+2 3388/6788.

RedRoundhead · Mar 28, 2012

I grew up on a 886, and I agree with the previous statement about lever feel and shifting; the 86 series shifting and T/A levers left a lot to be desired. Really stiff on the T/A lever, and I don't think I was ever able to shift a gear without at least a little grinding. The clutch pedal on our was stiff as a board, too. And we bought the tractor brand new. You also need to lean WAY back in order to see the drawbar or three point when backing up to implements. The cab on the 86 was really nice and quiet, though.

The 66 series is alot nicer to shift, and easier to see around, IMHO. And the cabs are OK, depending on which ones you get.

Best of luck!

pete 23 · Mar 28, 2012

The TA lever detent was changed on the 86 series. Originally and well into production they used a straight steel roller on the detent arm and they went to a needle bearing. Made a world of difference on TA lever ease of movement. Just put one in a late 1086 last month that you could hardly pull the lever with one hand. Before that change took place I used to rework the detent ramp to make them easier to work. Far as grinding gears, 66 no different than an 86. It was the individual clutch and the adjustments that make the difference. I do also like the shift lever better on the 66 series. That darn park on 86 series being on the same lever gave reverse a double detent to overcome and a pin in the quadrant had to take all kinds of different routes to achieve this. 3*88 series put park back onto a separate lever and made life easier.

mkirsch · Mar 29, 2012

Yup, the tractor under the cab is ALMOST identical from the 66 to 86 series. Just minor changes for the most part.

The big difference from the 66 to 86 is the modern, isolated, sealed cab.

Some people don't like the left-side shifting on the 86 series, and if the linkages are worn they can be tough to shift.

On the dead-nuts simple and robust scale, the 66 series wins hands down, but you need good ear protection.

Super-H-Mike · Mar 29, 2012

Red, I had the exact same expirences on an 886 as yourself, and you are dead on with the shifting, and vision troubles...however ours was new as well, and the clutch and TA were pretty easy and normal to push. Wonder why? 886 was a quiet tractor to run. I always thought she rode kinda rough , did you? Duals took that away though.

86 series ta's vs 66 series ta's

Grant boyIN1985

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ND856

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mazemeister

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the tractor vet

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Anonymous-0

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Anonymous-0

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RedRoundhead

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pete 23

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mkirsch

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Super-H-Mike

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