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Implement Alley Discussion Forum

PTO U-joint cross bearing removal

Author 
Paul Schultz

11-13-2006 18:08:24
75.45.196.234



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I am resurrecting an old Ford 909 rotary cutter. I bought a new PTO shaft since it didn't come with a complete useable shaft.

My problem is that the implement end of the original PTO shaft has a unique yoke (possibly a 'torque limiter' yoke?). So, I want to remove this yoke and place it on the new PTO shaft. The cross bearing on the original PTO shaft needs to be removed. I'm soaking it with penetrating oil but am in need of the proper procedure for removal of the cross bearing. Anyone willing to share?

TIA,

Paul.

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RodInNS

11-14-2006 07:03:43
142.177.105.84



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 Re: PTO U-joint cross bearing removal in reply to Paul Schultz, 11-13-2006 18:08:24  
My prefered method of disassembly is to set one yolk over a vice, or in it, and then beat on the other yolk with a hammer to knock the cups out. Flip it over, and do the other. When the first two are out, turn the yolk around and set the cross over the vise and beat on the yolk to get the other 2 cups out. I only torch them when I'm stuck.
I've never been very fond of using a press for U-joints either. I like doing this by hand, or with a vise for the simply reason that I can "feel" what I'm doing. Mabey it's just me, but I find that at times, a needle or 2 will fall down in the cup, or otherwise become dislodged. If you've got this setup in a press, you are not going to notice that until something snaps. In a vise you don't have power enough to break it easily. If you feel some resistance, or it doesn't seem to be going "right", stop, take it apart, and see what's going on. Odds are, a needle has dropped. Anyhow, that's just how I change them.

Rod

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Paul Schultz

11-14-2006 20:32:14
75.45.211.63



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 Re: PTO U-joint cross bearing removal in reply to RodInNS, 11-14-2006 07:03:43  
I used the socket/vise method to slide the cross bearing to one side. But, the cup only protruded about 1/16" and I couldn't get a grip on it. The cups certainly weren't free enough to freely twist. After several repeats of this method in an attempt to slide the cross bearing back and forth and loosen it in the yoke I only became frustrated. That is when I determined that I didn't have to worry about the one yoke that would not be used in the future and I locked everything in the vise and beat on the sacrificial yoke and out popped one of the caps! I reversed the direction and out popped the other cap. Even with the caps off I still had to wiggle the cross bearing to get it out. It doesn't appear I've damaged the good yoke in the process.

Now, I need to learn the proper technique for installing the yoke onto the new PTO shaft/yoke with a new cross bearing. Any words of wisdom out there?

Thanks,

Paul.

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Doug Boll

11-14-2006 06:42:57
63.65.68.246



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 Re: PTO U-joint cross bearing removal in reply to Paul Schultz, 11-13-2006 18:08:24  
If thge cross is junk I cut it with the torch then drive the cups out, I am not reusing it anyway, just be careful of hot grease!



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Allan In NE

11-14-2006 03:42:47
148.78.243.26



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 Re: PTO U-joint cross bearing removal in reply to Paul Schultz, 11-13-2006 18:08:24  
The only way to do that job is with a big hammer and a good, sturdy vice.

Hard to explain and one really needs to see it done by someone experienced to get the technique down, but loose the presses, sockets, penetrating oil and all the rest 'cause you'll just make a mess.

Beat 'em out and beat 'em in. 3 or 4 minutes, tops. It is just a matter of where the blows are placed.

Allan



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Paul Schultz

11-13-2006 19:36:14
75.45.196.234



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 Re: PTO U-joint cross bearing removal in reply to Paul Schultz, 11-13-2006 18:08:24  
I have a good size vise. I'll give old's method a try tomorrow.

Thanks,

Paul



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IBorange in TX

11-13-2006 19:23:56
72.251.15.254



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 Re: PTO U-joint cross bearing removal in reply to Paul Schultz, 11-13-2006 18:08:24  
I agree with OLD, you did not mention the size of the yoke. On the small PTO yokes, both caps have to come off before you can wiggle the cross out. On the large yokes, you wiggle the cross out w/just one cap off. When pressing the caps, be sure not to press or hammer on the yoke. It will warp the yoke. Place the yoke and both sockets in the vise, use some PCB on the caps and close the vise. You might want to use a "big brother" on the vise handle. Try tapping on the yoke while in the vise. Sometimes they are a pain in the a$$ to get out, but it will break loose. BTDT, it all ways happens when I'm in the middle of cutting,or baling hay.
Good Luck.......

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old

11-13-2006 18:44:39
4.245.5.216



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 Re: PTO U-joint cross bearing removal in reply to Paul Schultz, 11-13-2006 18:08:24  
My self I use a shop press to remove the U-Joints in PTO shafts and other drive lines. I usto use the hammer and vise but a shop press works a lot better



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Paul Schultz

11-13-2006 18:52:19
75.45.196.234



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 Re: PTO U-joint cross bearing removal in reply to old, 11-13-2006 18:44:39  
Old,

If I find someone with a shop press will I need both cross bearing caps removed? Or, with one cap removed is there generally enough wiggle room to remove the cross bearing from the yoke?

Paul.



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old

11-13-2006 19:05:44
4.245.5.216



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 Re: PTO U-joint cross bearing removal in reply to Paul Schultz, 11-13-2006 18:52:19  
99% of the time you have to have both caps out or at least most of the way out to remove the cross bar. Some times you can also use a vise like a press. What you do is put a socket that is a little bigger then the cap on one side and then take a smaller socket and use it to push on one cap. Close up the vise and then tighten it down as hard as you can. Some times hitting the moveable vise jaw with a hammer helps

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J Schwiebert

11-13-2006 18:36:11
209.143.51.226



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 Re: PTO U-joint cross bearing removal in reply to Paul Schultz, 11-13-2006 18:08:24  
Its called a big hammer and a good size vice. Now next question is your new shaft a direct replacement for the old shaft/ If not there are what I used to call "jump joints" that will let you assemble shafts with different yokes. Make sure you take the snap ring off first and keep one for a spare in case one goes flying. The needle bearings for the cross are pressed in. Another reason for the vice. Questions? J.

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Paul Schultz

11-13-2006 18:50:09
75.45.196.234



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 Re: PTO U-joint cross bearing removal in reply to J Schwiebert, 11-13-2006 18:36:11  
I placed it into a vice and used a large sized socket to allow me to drive the cross bearing so that it would be offset in the yoke. I was then hoping the opposite side of the cross bearing would protrude from the yoke enough for me to get the cap off. I'm still trying to figure out how to get the bearing out at this point though. I assume I will need to get both caps off prior to being able to wiggle the cross bearing assembly from the yoke. Since it isn't budging I assume I have some rust locking it in place....

I have the snap rings off already.

Is my described method acceptable? I've never dealt with this type of repair before.

Paul.

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charley hellickson

11-13-2006 22:30:46
12.216.146.38



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 Re: PTO U-joint cross bearing removal in reply to Paul Schultz, 11-13-2006 18:50:09  
Hi Paul. Push the bearing cross all the way to one side and take cap off. You might have to use vise grip or something on cup to rotate and work it out if it doesn't just drop of. Then you put something against the bearing shaft and push it back the other way to get that bearing cup out of the yoke, then you can get the cross out. Hope this helps. Charley.



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