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Farmall & IHC Tractors Discussion Forum
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300 UT trans input shaft bearing nut

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5 Forward

12-30-2015 08:45:02




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I have a question about the large nut on the transmission input shaft. This tractor does not have T/A and has a transmission driven pto. After removing two small covers, the transmission input shaft(long shaft)is visible, then a coupling to the main shaft, a spacer, then the bearing nut. This nut is loose. Shouldn't this nut be tight to put a preload on the bearing. I am having trouble with the pto wondering if this is part of the problem. The tractor moves in all forward gears and reverse with no strange noises. The pto will not drive the bushog to the 540 rpm. Clutch was just replaced, I had a previous post about the clutch and pto about a month ago just found this nut issue.

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D Slater

12-30-2015 09:40:28




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 Re: 300 UT trans input shaft bearing nut in reply to 5 Forward, 12-30-2015 08:45:02  
Yes the nut should be tight and have a lock to keep nut from backing off. But if the tractor pulls without slipping that's not the problem with PTO. If you posted before, think I remember telling you to check the stub shaft in the rear of the hollow Countershaft to see if the slippage is there. Did you check? If all the transmission gears work like they are supposed to, Your problem is limited to the rear of countershaft back through PTO and should be found in that area. Last gear that powers the wheels on countershaft is just ahead of where the PTO is driven from the same shaft. If your sure the ground speed isn't dropping the problem has to be in the area specified above.

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5 Forward

12-30-2015 10:10:00




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 Re: 300 UT trans input shaft bearing nut in reply to D Slater, 12-30-2015 09:40:28  
Thanks for the info. I thought that nut being loose may allow that shaft to move causing some of the problem The plan is to break it apart now that the holidays are over. Does the hydraulic reservoir come off separate or can it come together with the trans top cover



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D Slater

12-30-2015 16:45:45




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 Re: 300 UT trans input shaft bearing nut in reply to 5 Forward, 12-30-2015 10:10:00  
Hope someone that's done that more recent will post. To be honest those utility tractors are not my favorite to work on. That's why it's been a long time since I fooled with one. From what I remember the top cover and hydraulic reservoir comes off as one. Think I remember some bolts mounting the reservoir on go through into the transmission housing and need to come out along with lines or any other thing attached to cover unit. Like the 2 point hitch parts on rear top. Thinking they should be 19 bolts going into the top cover to transmission housing. Just did a row crop a while back and think I remember cleaning 17 or 19 bolts. 19 I believe. Looked at parts picture in the past and only shows a one piece counter shaft for a transmission driven PTO. But if you go to the shaft number it lists along with the shaft a bushing, stub shaft and pin.

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Janicholson

12-30-2015 14:52:53




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 Re: 300 UT trans input shaft bearing nut in reply to 5 Forward, 12-30-2015 10:10:00  
Use the parts pictures on caseih.com site. The search for parts by model works well. Jim



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