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8N Clutch problem - or is it?

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Andy in NH

08-06-2005 09:19:43




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Harking back to my question of last week: "The clutch on my '52 8N appears to be stuck in the disengaged position (no power to the wheels or the PTO) Happened with no prior slipping or warning symptoms that would indicate impending failure - I was letting the tractor roll down a gentle slope, and when I released the clutch - nothing. The pedal still feels like it's doing something, but there is no power aft of the engine."

To follow up:
I have not separated the tractor yet (yes, I'm putting it off) however, apon further investigation I'm not so sure it is a clutch problem. I pulled the transmission cover just to see if anything was obviously wrong in there and lo and behold when I let the clutch out one of the shafts spins and throws oil all over the place (I agree that this isn't a very good thing to do regularly)Also, now that the tractor is on a level surface, you can feel it sort of budge when you let out the clutch. If the problem is with the clutch, shouldn't there be no motion whatsoever aft of the engine?

Dell, Rob, everyone else - I apprecitate your wealth of opinions.

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Bob

08-06-2005 21:25:22




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 Re: 8N Clutch problem - or is it? in reply to Andy in NH, 08-06-2005 09:19:43  
Andy,

Depress the clutch, and shift the transmission into gear, with the PTO engaged, also.

Release the clutch. If you are not moving, look back at the PTO shaft.

PTO NOT turning... likely clutch problem.

PTO TURNING... the clutch is OK, and the problem is farther back.



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ZANE

08-06-2005 18:00:56




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 Re: 8N Clutch problem - or is it? in reply to Andy in NH, 08-06-2005 09:19:43  
The hub is broken out of the clutch disc.

Get that sucker broken into and fix it! :O)

Zane



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ezyed

08-06-2005 15:37:11




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 Re: 8N Clutch problem - or is it? in reply to Andy in NH, 08-06-2005 09:19:43  
Andy, Could you have something wrong in the differential or a broken axel? Even sheared splines in the hubs? Try putting in gear and have some one look at the hubs to see if the axel is turning. I would check everything that I could think of before I split the beast.



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Rob

08-06-2005 17:39:07




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 Re: 8N Clutch problem - or is it? in reply to ezyed, 08-06-2005 15:37:11  
The PTO doesn"t work either. It"s driven from a different shaft out of the transmission. The diffy can be trashed but the PTO would still work.



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Rob

08-06-2005 12:13:47




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 Re: 8N Clutch problem - or is it? in reply to Andy in NH, 08-06-2005 09:19:43  
Hey Andy, I still don"t know it"s a clutch problem. It may be the tranny isn"t in gear because the shifter isn"t shifting anything. Look at the bottom end of the shifter. Is it broke or something come loose under the cover there? See to it that the shifter forks are properly engaged to the couplings on the shafts. They way you have it, you should be able to push in the clutch and then rotate the input shaft, even if you do it with a long screwdriver prying against the gear teeth. Check that and then slide the rear shifter fork, the one on the output shaft (the shaft runs straight off the end of the input shaft out the back of the tranny to the rear wheels; might look like one long shaft in the front and out the back but it isn"t), forward to lock the input shaft to the output shaft. Now, you should not be able to push in the clutch and turn the input shaft unless the rear wheels move.
I think I have all that right, check it out.

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Andy_in_NH

08-06-2005 15:43:04




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 Re: 8N Clutch problem - or is it? in reply to Rob, 08-06-2005 12:13:47  
Rob-
your transmission predictions are dead on regarding being able to turn the input shaft gear. Does this rule out the clutch, I think? where to check next?

Thanks again for your input.



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Rob

08-06-2005 16:28:53




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 Re: 8N Clutch problem - or is it? in reply to Andy_in_NH, 08-06-2005 15:43:04  
If the input shaft won"t turn unless you push on the clutch pedal then the clutch is engaged. But you know that because you started then engine and the input shaft turned. The clutch engages. Try turning it by hand without pushing on the clutch pedal.
Please read that long post and try the shifter forks and stuff I talk about. It will just take 5 minutes.



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Andy in NH

08-06-2005 18:57:00




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 Re: 8N Clutch problem - or is it? in reply to Rob, 08-06-2005 16:28:53  
Everything you said in your earlier post was spot-on. I guess this leaves me chasing problems in the shifter itself?



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Rob

08-06-2005 19:51:48




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 Re: 8N Clutch problem - or is it? in reply to Andy in NH, 08-06-2005 18:57:00  
Well, sounds like it now. Must be something loose or broke in that tranny cover/shifter.



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old

08-06-2005 09:29:41




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 Re: 8N Clutch problem - or is it? in reply to Andy in NH, 08-06-2005 09:19:43  
Well that shaft could still spin and you have a bad clutch. Its call fiction in the pilot bearing area and even the cluthc if its bad. Sort of like how a PTO shaft will turn at times and not be in gear. But you could also have something in the tranny wrong also. Now if you could put it in a gear and turn the engine over and the shaft still turns then I would think you have tranny problems



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