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1968 D10 Clutch Woes

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KD8NGV View Drop Down
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Joined: 03 Oct 2010
Location: Ohio
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Post Options Post Options   Thanks (0) Thanks(0)   Quote KD8NGV Quote  Post ReplyReply Direct Link To This Post Topic: 1968 D10 Clutch Woes
    Posted: 03 Sep 2022 at 5:42pm
Question: I put a new throw-out bearing in my D10. I adjusted the clutch. I took the pressure plate and clutch off and did not see any major issues. I put the tractor back together and when I push the clutch in when the tractor is anything above an idle, it acts like the pressure plate is not removing enough force to let the clutch stop. I then adjusted all 3 bolts on the pressure plate to be driven in as far as they will go. Still won't let the clutch disc stop turning above idle. Am I adjusting the wrong way or am I in need of a new pressure plate?
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Rick View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Rick Quote  Post ReplyReply Direct Link To This Post Posted: 03 Sep 2022 at 6:14pm
You need 1/4" between the throw out bearing and the clutch fingers...did you have any problem with aligning things back up when putting the clutch back in? It doesn't take much to bend or tweak the disc to where it's not flat as should be...try the re-adjusting thing first...
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Post Options Post Options   Thanks (0) Thanks(0)   Quote KD8NGV Quote  Post ReplyReply Direct Link To This Post Posted: 03 Sep 2022 at 6:30pm
After I put the tractor back together, I performed the clutch adjustment per the book.  Ended with 1" of clearance from the clutch return pad and the platform. Gave me about 2" of pedal movement.  I then took my camera and verified that the fingers of the pressure plate were not touching the bearing.  All good.    I did have a time trying to get the splines on both shafts to line up with the ones on the clutch and flywheel.  I would try to push it in, release move the flywheel a bit and try again.  Maybe I pushed too hard?   

I thought maybe I needed to adjust the fingers on the pressure plate, which I did to the point where there are no more threads left on the bolt.  When I am at low idle the clutch stops moving when we push the pedal.  At high idle it acts like it is slipping when you push in the pedal.  I would think screwing in the adjustment bolts on the pressure plate to the max would allow for the max space between the pressure plate and the flywheel.  Is my logic flawed?
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DiyDave View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DiyDave Quote  Post ReplyReply Direct Link To This Post Posted: 03 Sep 2022 at 7:02pm
Did you replace the pilot bushing?
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KD8NGV View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote KD8NGV Quote  Post ReplyReply Direct Link To This Post Posted: 03 Sep 2022 at 7:36pm
I did not replace the pilot bushing. Think that might be it?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DiyDave Quote  Post ReplyReply Direct Link To This Post Posted: 03 Sep 2022 at 8:06pm
Possibly.  Also might be that the shaft is scored, or the tranny input bearing is loose, or a combination of the 3. Good luck, though it means splitting again, to check!  Take some pictures, we love pictures!Hug
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Rick View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Rick Quote  Post ReplyReply Direct Link To This Post Posted: 04 Sep 2022 at 4:33am
If you screwed the adjusting screws all the way clockwise, which it sounds like you did, then the fingers would be riding on the throw out bearing all of the time...I'm thinking a bent/warped disc...a split regardless. 
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WF owner View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote WF owner Quote  Post ReplyReply Direct Link To This Post Posted: 04 Sep 2022 at 6:30am
Are you sure the clutch disc is not in backwards?
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KD8NGV View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote KD8NGV Quote  Post ReplyReply Direct Link To This Post Posted: 04 Sep 2022 at 9:39am
The clutch disc has the longer part of the splined "hub" facing rearward.   Sounds to me that I need to invest in some new parts.  

Clutch
Pressure Plate
Pilot bearing

Anything else while I am in there?  I can take some pictures when I get her split again.  Maybe one of those things where someone else goes "Hey dummy, there's your problem." lol
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Eric B Quote  Post ReplyReply Direct Link To This Post Posted: 05 Sep 2022 at 11:18am
This happened with one of my old Allis tractors last week, it was a surprise to me. The clutch always worked perfect, then after the tractor had had minimal use over the summer I went to move the tractor and the gears would only grind. I had been aware of a slow trans. oil leak, I checked the oil level which was very low. After topping up the trans. with proper oil the gears stop immediately when depressing the clutch. Everything is perfect again (except for the slow trans. leak). You may want to also check your transmission oil level.
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