A new problem!

Farmall B & BN Tractors, 1939-1947

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Jim Becker
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Re: A new problem!

Postby Jim Becker » Thu Oct 26, 2017 11:12 pm

It is possible to align a clutch disk by eyeballing it. I've done it. If it went together without excessive force, it should be OK. The first time you press the clutch pedal down, any previous alignment (or lack of) becomes irrelevant.

Texas Tony
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Re: A new problem!

Postby Texas Tony » Fri Oct 27, 2017 3:11 pm

Jim Becker wrote:It is possible to align a clutch disk by eyeballing it. I've done it. If it went together without excessive force, it should be OK. The first time you press the clutch pedal down, any previous alignment (or lack of) becomes irrelevant.


I was hoping I lined it up pretty close, but will know this evening when I can get under it and turn the flywheel to see what's hitting and causing all the racket. You're right... it went together with no excessive force and all appeared in good shape when I tightened the bellhousing bolts up. In a perfect world, I'll step in the clutch, start the tractor, magic will happen, and the knocking noise will go away. But I probably couldn't be that lucky!

Texas Tony
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Tractors Owned: 1936 MM J-T (2)
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1940 Farmall B

Re: A new problem!

Postby Texas Tony » Fri Oct 27, 2017 7:11 pm

So it would appear that two of the three of the pressure plate fingers are on the outside of the throw out bearing. One looks like it is on the inside of the bearing, or at least on the inside of the inner part of the race. Sorry, I can't get a good picture from the hole in the side of the bellhousing.

I'm thinking that I will get some long half inch bolts maybe 6" or so long and replace the bolts holding the bellhousing and engine together and see if I can slide it back enough to get it outside without splitting the whole tractor. This will take some thinking tonight.

tst
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Re: A new problem!

Postby tst » Fri Oct 27, 2017 7:56 pm

if it was misaligned I doubt that the shaft would have gone in to the clutch and pilot bushing unless something was broke tighting the housing and engine together, did the tractor go together easy or was it a battle?

Texas Tony
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Tractors Owned: 1936 MM J-T (2)
1960 MM M-5
1969 Oliver 1850
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1940 Farmall B

Re: A new problem!

Postby Texas Tony » Fri Oct 27, 2017 8:41 pm

tst wrote:if it was misaligned I doubt that the shaft would have gone in to the clutch and pilot bushing unless something was broke tighting the housing and engine together, did the tractor go together easy or was it a battle?


It went together quite easily, with no fighting at all. I lined up the shaft and splines, shot a little WD-40 on the shaft and slid it together. This has me thinking, again. I'm going to try to take a picture so everyone can see; stand by :-)

Texas Tony
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Tractors Owned: 1936 MM J-T (2)
1960 MM M-5
1969 Oliver 1850
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1940 Farmall B

Re: A new problem!

Postby Texas Tony » Fri Oct 27, 2017 9:10 pm

Ok, here goes nothing. Somebody tell me how talented I am to have pulled this little stunt off!
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tst
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Re: A new problem!

Postby tst » Fri Oct 27, 2017 10:23 pm

pretty sure you found the noise

Texas Tony
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1940 Farmall B

Re: A new problem!

Postby Texas Tony » Sat Oct 28, 2017 1:29 pm

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Bottom view
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Side view
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I split the tractor enough to get the pressure plate fingers to move down and on the inside as you can see in the picture. If I push the tractor back together, will that top finger move into place inside the bearing?

I'm going to wait and see what the experts here think.

As always, ideas, comments, suggestions are most welcome. And thanks for everything so far.

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Re: A new problem!

Postby Urbish » Sat Oct 28, 2017 2:00 pm

The tip of top finger looks pretty bent to me, but it might just be the perspective. I'll let the others weigh in as I'm not sure what you should do. If it were me, I'd pull the whole thing apart.

Jim Becker
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Re: A new problem!

Postby Jim Becker » Sat Oct 28, 2017 2:06 pm

Just eyeballing it, those fingers look way too high. It looks like somebody screwed the adjusting bolts in as far as they would go. The fingers should be at an angle more like the one in the foreground of your first picture. I don't have a proper dimension, but 1-1/2 inches from the flywheel surface where the pressure plate bolts on is probably about right. Absolute uniformity between the fingers is more important that slight variation in the absolute position. You also need to clean the rust off that splined shaft. Once you have it together set the pedal free play to 1-1/2 inches by the adjusting nuts accessible through the opening at the rear of the bell housing.

Texas Tony
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Tractors Owned: 1936 MM J-T (2)
1960 MM M-5
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1940 Farmall B

Re: A new problem!

Postby Texas Tony » Sat Oct 28, 2017 2:19 pm

After all of this time and effort, I happen to look down on the concrete floor and noticed a drip of oil. I reached down and touched it, and discovered antifreeze in the oil. A closer inspection of the head gasket seam revealed more antifreeze. I'll be at the front door of the machine shop that rebuilt the engine Monday morning.

So close to being done and now this. Happy Saturday, everybody.

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Urbish
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Re: A new problem!

Postby Urbish » Sat Oct 28, 2017 9:34 pm

Doh! Yep, I think they owe you an explanation.

Texas Tony
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Posts: 86
Joined: Fri Mar 03, 2017 11:39 am
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Tractors Owned: 1936 MM J-T (2)
1960 MM M-5
1969 Oliver 1850
1950 MM Z
1977 IH 1466
1940 Farmall B

Re: A new problem!

Postby Texas Tony » Sun Oct 29, 2017 9:47 pm

See accompanying pictures. I'm guessing that the plate contacted with the yoke on the carrier bearing somehow and that ate up the tops of the springs like that. Sorry, but I just thought about that and I don't feel like walking out to the shop tonight to see. I'll be taking the plate to my friendly neighborhood clutch shop in the morning to see if he can salvage the springs, etc out of this slightly-used one and build me a new one.

First the clutch issue and then I'll tackle the leaking engine. Thanks to all who've followed this saga and offered advice and wisdom.
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