I plan on working on/getting help with my PTO at the Barnyard Bash and I want to be sure to have whatever I might need in the way of parts on hand. The main problem I see is way too much of a gap between shafts. There is not much play with either shaft. I understand that there is a bearing retainer that sometimes gets installed backwards allowing the trans shaft to travel forward. I'm afraid that's what I'm dealing with. Also, the splines on the trans shaft are pretty rounded, but I don't know how much is too much. I took a pic to try and show both the gap and the worn splines.
Im going to order a new shift lever. I have a new bearing and seal and pilot bushing. The PTO shaft and collar look good to me. All suggestions welcome.
Thanks,
Clint
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Prepping to fix PTO; what might I need?
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- clintmo
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Re: Prepping to fix PTO; what might I need?
New PTO seals are half the width of originals so I installed 2 on my Cub.
Larry
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Re: Prepping to fix PTO; what might I need?
Clint, Did the PTO engage easily even though the splines are rounded? If so, you can possibly skip replacing the shaft. The lever can be repaired by drilling out the worn pin and silver soldering/welding a hardened steel pin in its place (a drill shank of the right diameter works good (1/4 " or 5/16", don't remember). You'll also want to replace the pilot bushing. Do you know if the PTO shaft has a staked bearing or the newer snap ring version?
Bob
Bob
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we need to think differently."
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- bob in CT
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Re: Prepping to fix PTO; what might I need?
Larry in WNY wrote:New PTO seals are half the width of originals so I installed 2 on my Cub.
Larry
Let me tell you why this is not a good idea.
First, the original seals were made decades ago from the best material available at the time: leather. Leather had a good run, but new materials, like nitrile rubber, and new lip designs are FAR superior- thin or not.
Next, even the new designs are designed to run wet to keep them from wearing. The inner seal does the work as designed, but the outer seal is starved for lube and wears quickly. This opens the door for dirt to pack in between the two seals and that eventually wears the inner seal prematurely.
Use the thin profile to your best advantage by positioning it to ride on parts of the shaft without wear grooves or pitting.
- clintmo
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Re: Prepping to fix PTO; what might I need?
Ok, here's how it went down. I got this tractor last spring. PTO worked great, although there was a ticking coming from that general area from day one. I mowed with it a good bit over the summer: heavy, high stuff. It did great until one day it it made a loud grinding when I tried to engage. I adjusted the lever mount thing on the outside to get a bit more reach and that worked for a while and then it went out again. I took it all apart and found the large gap between shafts, and the pin on the lever was flat on one side. I replaced the lever, bearing (snap ring) and pilot bushing and put it all back together. Still had the large gap but I tried it out anyway. Almost made one lap around the yard and it went out again. That's when I gave up and put the mower on the other Cub. I just opened it back up and found that that new pin was wrecked in those couple minutes of mowing. It was a cheap one, which I now know was a mistake, but obviously there is a bigger problem. Bob, to answer your question, it engaged perfectly and never was a problem. Until it was.
That's the story.
bob in CT, It looks like there are multiple seals already installed by the PO. I did not install the new one yet.
That's the story.
bob in CT, It looks like there are multiple seals already installed by the PO. I did not install the new one yet.
- clintmo
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Re: Prepping to fix PTO; what might I need?
Is it possible that the PTO shaft is short? I would just go measure it but it's all put back together. Had to use the tractor today. Has anyone encountered a short PTO shaft?
Clint
Clint
- bob in CT
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Re: Prepping to fix PTO; what might I need?
Have you seen this? http://www.farmallcub.com/phpBB2/viewtopic.php?f=141&t=32935
There were two designs. The early one had a staked bearing.
There were two designs. The early one had a staked bearing.
- Steve Butram
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Re: Prepping to fix PTO; what might I need?
Look at the main shaft splines for excessive wear. If the splines are worn you may need to replace it also
Be prepared to be unprepared Seth Goden
- clintmo
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Re: Prepping to fix PTO; what might I need?
bob in CT, mine is the snap ring version.
Steve, the splines on the main shaft do look worn to me. I tried to get a picture that shows the wear. See the pic in my initial post. Can you tell by that pic if the wear is excessive?
Thanks.
Steve, the splines on the main shaft do look worn to me. I tried to get a picture that shows the wear. See the pic in my initial post. Can you tell by that pic if the wear is excessive?
Thanks.
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Re: Prepping to fix PTO; what might I need?
I'm no expert but that main shaft looks pretty worn to me. It doesn't take much and that looks like more than "much" to me. You are going to have to split at the front of the transmission to check if the retainer is backwards anyway. At that point replacing the driveshaft is unbolting the retainer, which if it's backwards you'll have to do anyway. Save the old driveshaft for a non PTO Cub or cut off a foot from the front and have yourself a nice clutch alignment tool.
- bob in CT
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Re: Prepping to fix PTO; what might I need?
That big gap should not be there. The locking collar does not grab very much spline on either shaft. Since you have the retaining ring on the PTO bearing, your concern about the flipped bearing up front is looking more likely.
I wonder if you could move the input shaft somehow to confirm that?
I wonder if you could move the input shaft somehow to confirm that?
- clintmo
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Re: Prepping to fix PTO; what might I need?
bob in CT, I tried but couldn't really get a good grip on it. If I drained the gear oil and removed the larger cover (PTO adapter) I'd have a better chance.
I think it looks like it'd be smart to have a new transmission shaft on hand when we undertake this project at the Bash.
I think it looks like it'd be smart to have a new transmission shaft on hand when we undertake this project at the Bash.
- Steve Butram
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Tryke
Rat Cub - Circle of Safety: Y
- Location: IN West Lafayette
Re: Prepping to fix PTO; what might I need?
since you will need to remove the Main shaft to replace the front retainer. plan on replacing the main shaft.
Be prepared to be unprepared Seth Goden
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