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8N Clutch problem + separation anxiety

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Andy in NH

07-31-2005 05:12:13




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It seems as if every second or third time I use my tractor this season Something breaks. 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.
Any Ideas? Assuming I have to separate the tractor, does anyone have any good advice (or links to good advice) on that? I have separated it once before between the transmision and the rear end to replace the drive shaft, and that was very straight forward, but this seems more involved. Plus, the Jen Sales manual I have is long on specific information about rebuilding individual components but short on information about how it all goes together...

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Rob

07-31-2005 11:24:28




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 Re: 8N Clutch problem + separation anxiety in reply to Andy in NH, 07-31-2005 05:12:13  
Maybe it isn"t in gear. The N tranny can do odd things when it is powered from the read wheels. Coasting with the clutch disengaged might not be the best way to go. Is your tranny shifting or just seem like it? If the clutch is engaged then stuff will be spinning the tranny even if it is not in gear. Your clutch might be wet. Is the weep hole open? Dripping any fluid?
You have to attempt to adjust the clutch before you split the tractor so you have a couple things to do before you split.

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Andy in NH

07-31-2005 14:09:49




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 Re: 8N Clutch problem + separation anxiety in reply to Rob, 07-31-2005 11:24:28  
Hindsight appears to be 20-20 on the coasting thing...
The transmission seems to shift equally well with the clutch engaged or disengaged, same for the PTO. I can roll the tractor in gear withour depressing the clutch pedal, and hear the transmission gears turning. Also, now that I have the tractor on a relatively smooth level surface, I can see that the the tractor will " nudge" in the expected direction when the clutch is released.

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Rob

07-31-2005 15:02:02




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 Re: 8N Clutch problem + separation anxiety in reply to Andy in NH, 07-31-2005 14:09:49  
My point on the stuff turning in the tranny was when the engine is running, the tranny shifted to a gear, and the clutch pedal released. If you do that and stuff turns in the tranny then it"s tranny and not clutch. Just a quick check to rule that out before you split the tractor is all.



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ZANE

07-31-2005 05:53:27




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 Re: 8N Clutch problem + separation anxiety in reply to Andy in NH, 07-31-2005 05:12:13  
third party image

This is the way to break the tractor at the clutch housing to engine.

The picture is of a 660 Ford but the procedure is the same for the 8N.

Tie a stout rope around the hood and oil pan to help support the weitht of the front end. Use a chain to hook a chain hoist to the center of the steering wheel. Around the steering shaft/post. Take the bolts out f the steering sector where it bolts to the clutch housing.

Of course you should disconnect any wires or other connections that would hold it together.

Put a rolling floor jack under the clutch housing or under the transmission drain plug and take up the weitht of the rear end. Remove the bolts that hold the clutch housing to the engine and take up the chain hoist so that the steering housing lift off the clutch housing slightly. Pull the two halves apart being sure that they are equally lifted and not more in one than the other up or down. When the rolling jack is pulled back a few inches so that the transmission input shaft is clear of the clutch you will have to lower the rolling floor jack enough to clear the steering housing as you continue to roll the rear end back until you have room to get to the clutch.

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Dell (WA)

07-31-2005 05:35:19




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 Re: 8N Clutch problem + separation anxiety in reply to Andy in NH, 07-31-2005 05:12:13  
Andy..... ...there's many posts in the "archives" at the top of this great N-Board about splitting the tractor at the tranny/engine for clutch work. Usually, most clutch problems are "failure to disengage" rather than "failure to engage". This is gonnnna require an "eye-ball inspection". Probably yer clutch throwout bearing shifter fork.

While it can be done with a floorjack under the tranny to "roll-back" the rearwheels while the engine is blocked, I like to suggest that you consider the merrits of a cheap ($25) wheeled boat-trailer tongue-jack. A clever shadetree mechanic can figgure out a sheetmetal "L" angle bracket to fasten the jack to the side of the tranny and you can eazily wheel and adjust yer tranny height for removal/installation.

I also like to recommend removing yer 4-bolt tranny input shaft to use as a clutch centering pilot. And while you have the tranny input shaft off, replace yer tranny input shaft seal. ($3, cheap)..... .....Dell

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