PTO shaft tubing replacement Help needed

[k0ua]

I could use a little help from those with more experience. On a La Magdalena PTO shaft, on the outside shaft tubing, (bell configuration) I want to replace this tubing with a longer one, I have removed the cross from the yoke and of course the roll pin from the yoke which holds the tubing in the yoke. Ha Ha, no stinking roll pin needed to keep that tubing in the yoke. That is the problem I cannot separate the shaft tubing from the yoke. It has soaked in Kroil for 2 days, the tubing is still in the yoke tightly. I am sure rust plays a part here, even though the yoke and the tubing are still nicely painted, I am sure the joint is rusted. I do not have a press. I am thinking this is the proper way, Punches and hammers have done nothing so far, any ideas would be appreciated.

Thanks

James K0UA

 

[crazyal]

Sorry I can't help you but two years ago I bought a 20 ton shop press that uses a hydraulic cylinder that can slide side to side and I can tell you that a press, several different size bearing separators, and arbor plates is one of the best buys I have ever made. I can't believe the amount of stuff I have beaten up with a hammer trying to get it apart. How many other people have used sockets to push out end caps on a universal? If you have the means and the room I highly suggest getting a press.

Without a press I think you're just going to need to have a lot of mass when hammering. Be careful not to mushroom the shaft when hitting. Maybe adding some heat to the yoke to try and get it to expand some could help. As a last resort you can try to twist the shaft while holding the yoke from turning.

 

[k0ua]

Sorry I can't help you but two years ago I bought a 20 ton shop press that uses a hydraulic cylinder that can slide side to side and I can tell you that a press, several different size bearing separators, and arbor plates is one of the best buys I have ever made. I can't believe the amount of stuff I have beaten up with a hammer trying to get it apart. How many other people have used sockets to push out end caps on a universal? If you have the means and the room I highly suggest getting a press.

Without a press I think you're just going to need to have a lot of mass when hammering. Be careful not to mushroom the shaft when hitting. Maybe adding some heat to the yoke to try and get it to expand some could help. As a last resort you can try to twist the shaft while holding the yoke from turning.

Well it is still soaking:laughing: I am not sure that is going to help, but can't hurt. I have thought of another way. Cutting inside the yoke with a hacksaw blade along the axis of the yoke and carefully just cutting thru the tubing and making at least 2 cuts and getting a strip of the tubing to come out with a punch. I am pretty sure this will work, but will require care in execution. I don't think twisting the shaft is going to help as it is the bell shaped shaft, and precision fit into the yoke. Yes the press is looking like a good purchase idea

James K0UA

 

[crazyal]

I think the yoke is harden steel so if the tubing isn't it may be not too bad. Do you have a drill bit the same size as the inner diameter of the yoke? Maybe you can drill the tube out.

I'm rebuilding a Herd seeder right now and they weld the tube to the yoke inside the hopper. The PTO shaft, the fan, the gears inside the gear box, and the agitator yoke are all held in place with roll pins after being pressed onto the shafts. Having a press has made this a fun project. One of the universals (cross) was pretty well rusted but it wasn't a match for the press. I got lucky and was given a length of 4" x1 1/4" x 40" steel that I cut up into 5 8" pieces. Between those pieces and the two arbor plates that came with it along with all sorts of scrap steel makes it real easy to prop everything up as needed.

Good luck.

 

[Baby Grand]

Interesting - I have a PTO shaft for my chipper that has a 45 - 60 degree twist in it. I tried to remove the "trilobulated" tube from the cross with no luck at all. I'm interested in how you finally get these apart. BTW - Kroil is great stuff, but if you have a really strong press fit, I don't think it's good enough. I like crazyal's idea of trying the shop press. There's a 20 ton taking up space in our garage that The Plant Manager keeps needling me about: "So, you've used that thing how many times?".

 

[k0ua]

Interesting - I have a PTO shaft for my chipper that has a 45 - 60 degree twist in it. I tried to remove the "trilobulated" tube from the cross with no luck at all. I'm interested in how you finally get these apart. BTW - Kroil is great stuff, but if you have a really strong press fit, I don't think it's good enough. I like crazyal's idea of trying the shop press. There's a 20 ton taking up space in our garage that The Plant Manager keeps needling me about: "So, you've used that thing how many times?".

OK I decided not to destroy the tubing to remove it. My idea was to cut off the tubing and then make cuts inside the tubing with a reciprocating saw and carefully finish them with a hacksaw to remove a section of the tubing to then punch it out.. I am sure this would have worked, given enough time and patience. But the more I thought about it I just reassembled everything, and bought another longer complete PTO shaft for $129 from the local Race Brothers farm store. The replacement tubing was going to run close to $80 so I though what the heck, I would now have 2 PTO shafts for just a little more. So now I have a short one and a Long one. The short one worked well when the tractor was a small B7500, but on my big new Kioti. It is just too short and not enough safety margin. So that is my story and I am sticking to it.. Yes I gave up, not because I could not get it out, but because I though better of it. I did get the joy of removing the crosses and losing one of the inside snap rings.."pling" it went across the shop somewhere, because I did not have proper snap ring pliers. I do now. So I got to hunt up some new snap rings and reassemble everything. A press would sure be nice.. I used my vise and some sockets. It worked, but just barely enough pressure.
I had never actually removed a cross before and it was a unique learning experience, highly recommended. Oh by the way the new PTO shaft had lots of nice grease slathered on the tubes, and the nylon bearing collar that the outer guard rides on and not a drop of grease inside the crosses. I know because the Zerks were painted over, and I pumped in lots grease. Oh, I also loved the unique way this new Eurocardan has for sliding back the outer safety guard, the unique little tiny black plastic locking mechanism and the 3 white nylon tabs and lining up the inner and outer rotating collars. was all in good fun. Yes Sir indeed I used about every curse word I knew directed at this Italian masterpiece. The old Spanish La Magdalena was much easier to understand and manipulate. But anyway the new Italian PTO shaft is on and I have a Spanish shorter PTO shaft for a spare for "something".

James K0UA

 

[k0ua]

I though about writing up what I learned about the Eurocardan PTO shaft, but this guy has already done it, and done a good job with pictures. Now if I had just went here first I could have saved myself a lot of curse words, but oh well, I like to learn thing for myself (the hard way).

My PTO shaft tips BBSHTCM


James K0UA