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Implement Alley Discussion Forum

Disassembly - PTO knuckle

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Dave H (MI)

08-05-2014 17:12:24
50.108.95.145



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Here is one I have really never gotten into. I have a guy who does my PTO shafts for me but he is a haul to get to and, since I have the parts, I thought I would give it a shot. I have a mower with an odd PTO end. You have to pull back on a black plastic collar that is spring loaded to keep it forward. While pulling back you have to push the PTO onto the tractor shaft. It is a push me/pull you kinda thing and I have hated it for the entire 25 years I have owned the mower. It is getting rusty and harder to work so I want to take that old female PTO fitting off the end and put on the generic thumb button type that the other 99 pieces of equipment around here have.

Question is, how do I take the knuckle apart? I thought there must be a way to drive the center out? There is a zerk on the center if that makes a difference. I don't see any obvious clips or such holding anything together. Is this a difficult job?

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Dave H (MI)

08-06-2014 06:58:26
50.108.95.145



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 Re: Disassembly - PTO knuckle in reply to Dave H (MI), 08-05-2014 17:12:24  
Thanks much all, pictures and descriptions were quite helpful! As I watch August race by at it's usual pace and realize I have a combine and two sprayers waiting for me to finish going over I have decided the mower can sit. I wanted to run it thru the lane in the woods to keep the skeeters and ticks back a few feet from where I am passing. I am going to take off this mower and put on the old reliable 5' brush hog style mower. Won't be as nice a cut but it will get the job done in a few minutes without all the fighting with other one. I'll just put on some long sleeves and gloves so it don't spray me with poison ivy like what happened a couple years back. If you ever want a bad case of ivy, just go out and mow it in a t-shirt. Thanks again!

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Tx Jim

08-06-2014 03:10:05
69.35.160.116



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 Re: Disassembly - PTO knuckle in reply to Paul, 08-05-2014 17:12:24  
Quoting Removed, click Modern View to see

6150MF
You have your left & right reversed as the RH go where red arrow is pointing & LH snap ring go where yellow arrow is pointing.



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6150mf

08-06-2014 23:44:12
71.51.194.11



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 Re: Disassembly - PTO knuckle in reply to Tx Jim, 08-06-2014 03:10:05  
thanks I am backwards at times



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6150MF

08-05-2014 23:04:05
71.51.194.11



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 Re: Disassembly - PTO knuckle in reply to Dave H (MI), 08-05-2014 17:12:24  
[img[URL=http://s3.photobucket.com/user/203030/media/89fc0e89-427a-4bbd-b292-b9f7565c96dd.png.html][/URL]

There are several different snap rings that could of been used. The snap rings on the left go where the red arrow is pointing,

The snap rings on the right go where the yellow arrow is pointing inside the knuckle

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DeltaRed

08-05-2014 17:39:56
67.40.59.57



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 Re: Disassembly - PTO knuckle in reply to Dave H (MI), 08-05-2014 17:12:24  
If you dont see any retainers/snap rings on the outside,then they are on the inside of ears on the caps.You will probably destroy the cross upon disassembly.You will need a large vise,big hammer and heavy punch.Set the one yoke across the vise jaws.drive the cap down,turn over and repeat.Look,think,you will figure it out......Good luck!



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JRSutton

08-07-2014 05:42:14
71.174.108.252



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 Re: Disassembly - PTO knuckle in reply to DeltaRed, 08-05-2014 17:39:56  
They usually punch out but I say your better off going to harbor freight and getting a ball joint press.

it will make your life infinitely easier when replacing u joints like this when you get one that's really stuck good.

Just watch for the caps exploding out the end when under excessive pressure. It's normal - just wear eye protection, and don't have spectators nearby.



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Retired Farmer

08-05-2014 17:23:09
72.19.130.74



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 Re: Disassembly - PTO knuckle in reply to Dave H (MI), 08-05-2014 17:12:24  
You will have to take the bearing cross caps out and get a different yoke. Take some penetrating oil and spray in the other one and clean the dirt out of it. Will probably work just fine unless it is worn out.



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Dave H (MI)

08-05-2014 17:43:05
50.108.95.145



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 Re: Disassembly - PTO knuckle in reply to Retired Farmer, 08-05-2014 17:23:09  
First thing I tried. Been doing it for 25 years. This time not gonna fly. The collar will not slide back and forth and the steel balls that lock it are either locked in or locked out. I can force them in but then they stay in. I even managed to get a couple to come out, but then they did not hold it together and it came off the tractor. No offense...after 25 years of screwing with it, I have a pretty good idea it needs replacing. Thinking I'll just run it out to the place and see can I talk them into doing it while I wait.

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DeltaRed

08-05-2014 17:48:20
67.40.59.57



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 Re: Disassembly - PTO knuckle in reply to Dave H (MI), 08-05-2014 17:43:05  
Sounds like it is just worn out.Probably grooved inside and the balls have some flat spots.Let the 'pros' do it this time,but watch/learn and ask questions.....



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