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Farmall & IHC Tractors Discussion Forum
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986 TA adjustment

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mazemeister

04-07-2008 16:36:04




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Adjusted the TA linkage on the 986 today by the book - so the snap ring just barely contacts the MCV in DD. The problem was, after that, in TA there was only about 15/16" of valve spool exposed, not the 1 1/8" the book calls for. So I took the tractor for a spin- when shifted into DD, it engaged with a thump (like it should), but when shifted into TA, it freewheeled. I found that at this point, I could reach down with the floor panel removed and manually lift the selector valve, and the TA lockup clutch would catch. After talking with the mechanic, I adjusted the linkage to achieve the 1 1/8" measurement in TA, which means the snap ring doesn't contact the MCV in DD. But it seemed to work properly on the test drive. Shifting into either DD or TA, I can feel the corresponding clutch solidly engage. Is the tractor now safe to use without damage to the TA clutches? Should I measure operating pressures to make sure? If so, how would I do that? btw it's a mechanical diode TA, less than 100 hours on it.

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the tractor vet

04-07-2008 22:32:51




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 Re: 986 TA adjustment in reply to mazemeister, 04-07-2008 16:36:04  
Well ya got some thing out of wack as you need full up and full down So i would start looking all the linkage over from the lever in the cab on down . ANd as for myself i do not care for the diode T/A's one little bit as for around here they do not last as just a couple years before i closed the shop i changed out 6 of them back to the Hy Cap T/A's and that has been 7 years ago and they are still going .

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