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Farmall & IHC Tractors Discussion Forum
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dual speed broken pto shaft

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Mapleridge

12-30-2005 15:28:13




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I broke the 540 pto shaft on the 986 dual speed pto. Is there a way to get the rear cover off the pto unit without dissasembling the PTO clutch? The only instructions I have is for complete diassembly. Looking at the parts diagram, if the snap ring on the rear of the 1000 RPM shaft is smaller than the seal, it could come off. Thanks for any help or advice.




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tww

12-30-2005 19:10:05




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 Re: dual speed broken pto shaft in reply to Mapleridge, 12-30-2005 15:28:13  
i have my pto out of my 886 right now ,it has to be removed and disassembeled .an IT manual is a necessaty . it took me about 3 hours to pull and disassemble mine ,and it was the first one i have done.



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ejr-IA.

12-30-2005 16:21:22




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 Re: dual speed broken pto shaft in reply to Mapleridge, 12-30-2005 15:28:13  
Looking at a I&T manual looks like if you get the back cover plate off you get the two shafts and idler shaft and gear with it,Its a picture of the break down assembly can't tell if all the bolts have to come out, I know theirs a couple bolts that holds the complete unit together.It's worth a try hith out takeing it clear apart.



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the tractor vet

12-30-2005 16:38:23




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 Re: dual speed broken pto shaft in reply to ejr-IA., 12-30-2005 16:21:22  
Nope it has to come out and be taken all apart from the ft. side .



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the tractor vet

12-30-2005 16:18:51




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 Re: dual speed broken pto shaft in reply to Mapleridge, 12-30-2005 15:28:13  
Nope , ya have to take it all apart and you will need to make up a spring compressor to relieve the spring tenshion a good set of snap ring pliers and it realy helps if ya got a cherry picker as this thing is not light and you have to be careful not to bang the pick up tube as it will be damaged when you remove the unit from the tractor . Best to get a manual . Or let someone that knowes what he is doing and has the tools and the special hdy. fitting to check pressure and set it . It takes me about three and a half hours if i have the parts and it would be a good time to put a new Hd. clutch pak in it as you are there along with new seals and gskts.

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Mapleridge

12-30-2005 19:50:02




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 Re: dual speed broken pto shaft in reply to the tractor vet, 12-30-2005 16:18:51  
Thanks for the replys. I have it out but just thought there had to be an easier way than going in the front. Closest IH dealer is two hours away so I'll be doing it myself. Pulled it out myself and didn't mess up the suction tube, but it does have some brazing so someone probably wasn't as careful before. I'll take it apart this week . Thanks again.



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JJK

12-31-2005 07:20:32




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 Re: dual speed broken pto shaft in reply to Mapleridge, 12-30-2005 19:50:02  
If the brazing is on the clamp and suction tube, thats the way it should be. The clamp when its new holds the tube tight but after a few years it doesn't hold it tight and the tube can move when it shouldn't. If you get the complete rebuild kit and the clutch discs (7 fiber and 9 steel discs), that should be all you need other than the 540 shaft and possibly the bearing. If the 2 teflon seals on the drum are not damaged, leave them alone, and just use them over. Check the bore in the center section that the drum and 1000 shaft is in to make sure that there are no goves where the seals ride. If there are then the seals will leak and won't be able to get the pressure high enough. A rebuilt center is available through Ag Parts. Make sure after the pto goes back in that the pressure gets set up to about 250 to 300 psi. I've rebuilt more pto's than I care to imagine and seen about anything that can happen to an IH pto, so if there are any questions don't be afraid to ask.

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