International 340 Utility PTO Issue

[militiaman11]

Hello,

I have a 1961 International 340 Utility that seems to have a PTO issue. Issue is i have a bush hog connected and it spins, but slowly. As soon as any kind of resistance meets the blades the PTO basically stops turning or turns almost not at all. once resistance is removed it continues to spin, but again not fast enough. I have the engine RPM up to 18000, which shows on the tach that the PTO should be at 540rpm. I have done a "slo-mo" recording with my phone to check the PTO speed. i know this is not perfectly accurate, but i'm able to determine that when there is nothing connected to the PTO is spins around 380rpm. when the bush hog is connected it spins about half of this. maybe i should use a timing gun, sure, but this at least shows there is a problem. i suspect the PTO is slipping somehow.

My questions is how do i adjust this, if possible? i have the operators and service manuals and they appear to show and describe a different PTO unit than is on this tractor. perhaps at some point the PTO was replaced with a different unit? the handle is different, and the planetary and clutch types shown in the manual for this tractor are also both different. the handle locks to disengage the PTO, but no lock to engage. just unlock and pull up. not sure if i should be pulling all the way to go to the top of the lock. please see the photos here for what i have. any assistance would be great. I have had a lot of help so far from the forum, so i hope you all can help again.

thanks ahead of time.

https://forums.yesterdaystractors.com/photos/mvphoto110057.jpg[/img]

 

[militiaman11]

(reply to post at 11:40:16 09/22/23)

<img src=https://www.yesterdaystractors.com/mvphotos/mvphoto110050.jpg>
<img src=https://www.yesterdaystractors.com/mvphotos/mvphoto110056.jpg>
<img src=https://www.yesterdaystractors.com/mvphotos/mvphoto110057.jpg>
<img src=https://www.yesterdaystractors.com/mvphotos/mvphoto110058.jpg>
<img src=https://www.yesterdaystractors.com/mvphotos/mvphoto110059.jpg>

 

[jhncp]

Did you try holding the pto handle back
farther past the notch?

 

[militiaman11]

jhncp, thanks for the reply. i have not yet done that with the tractor running because it seems very wrong to do. unintuitive because to pull the handle all the way back and lock is a very far pull for the handle, and your hand gets jammed between the handle and the fender. but maybe this is because this PTO isnt the stock PTO unit. i did pull all the way back and force to lock while the tractor was off, but this resulted just in the linkage flipping itself to account for the force i was putting on it. i was thinking i should disconnect the handle and engage and disengage the PTO unit lever itself to see if this changes things. the lever linkage can be adjusted, but is all painted and clearly hasnt been adjusted since being painted. the previous owner never used the PTO and didnt even know what the handle did. so, i dont know when it was last used. i will try pulling the handle all the way back and seeing what happens while running.

is there a manual that coincides with this PTO unit or a tractor that came with it? i have since found this seems to be an over center clutch PTO. possible from a 560. i was unfamiliar with this style PTO until today.

 

[used red MN]

FYI
Pictures post through the ..Browse or Choose files..
button just below where it says ..Upload
Photos/Videos.. down lower in the ..New post and reply
windows. Clicking that will give you a choice to select
the file or folder the pictures are stored in on your PC
or phone. Then select the photo from the file and
..Add.. it. They cannot be pasted into the text area as a
file.

 

[militiaman11]

used red MN, thanks for this but the problem is it doesnt work. i tried this many times while posting this topic, using classic and modern view, two different browsers, loading one image at a time, etc.. Does not work. i had trouble the last time i tried to post photos, and somehow it ended up working and displaying the text for the image source on its own. if you can explain to me what is causing the upload problem that would be great. otherwise, any info on my PTO issue would be helpful.

i will try once again with this post to upload photos, doing exactly as you say and what i've tried before.

thanks

 

[militiaman11]

And of course the photo upload magically works today. glad they are now visible.

 

[used red MN]

Send me an email, I will get you access to a manual.

 

[Janicholson]

The unit is not incorrect for the 340. This info is from the parts diagram. The control lever and linkage may have lost motion or sheared key problems. There is also to possible slippage of the part 12 fork on the cross shaft 19. There is also the possibility that the clutch pack is worn out and as such cannot drive to speed even without load1. Use this diagram (and the manual being supplied by Used Redman to assess the issue, Lost lever motion is easy to fix and assess. everything else is fix it on the bench. Jim
exploded view

 

[D Slater]

That's a early clutch type PTO, Later ones could be adjusted on tractor. Problem not found with linkage. Get a IT-shop service manuals that covers a 340 that explains how to adjust. Unit needs some disassembly. Guess they still sell them but haven't noticed.

 

[militiaman11]

Janicholson, thanks for this. Ill take a look. The service manual I have the for 340 does not cover this pto, so hopefully the one from used redman will be what I need for it. Thanks for the help.