American Bulldog
Gold Member
Yes the long arm is down on my 1460. This gives more mechanical advantage for the cylinder.
Roll Over Linkage - Some help plz
- Thread starter woodlandfarms
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coolconnection
Gold Member
Mine was long arm up but it bent the quick attach plate so they sent me an entire lift assembly to replace it. Now short side is up the way it is suppose to be, that is what they told me at PT. I have a PT 425 by the way.
J_J
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Does your roll-over assembly have the space to rotate around so the short end is down, or does it hit the connecting tubes for the lift arms? .
The difference is that if the length of the bottom and top roll over arm is about the same length as the QA plate mounts, then there is no mechanical advantage. If it is longer that the QA mounting points, there is a disadvantage.
With the short arm on the bottom, you will transfer less power to the QA plate. If you have the desired tilt, I would not worry about it.
If all mounting points were equal, you would be able to transfer the force of the cyl to the lip of the bucket.
American Bulldog
Gold Member
Here is a picture right off the PT website:
KentT
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My older, Kohler-powered 425 (similar to Mossroad's) has the long arm UP, not down. I thought that was the case, and I just went back and looked through a lot of FlickR pictures to confirm:
Flickr Photo Download: IMG_0096
I think my design is the same as the 422s. The newer 425's with the higher lift (and stronger wheel motors) may be totally different, since certainly something in the lift geometry is different in order to get the additional 6" of lift height...
J_J
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On my original rollover link, the length was 24 in, and the replacement was 20 in. and the layout of the holes was different. More force with short side up.
Can anyone roll their rollover link 180 degrees?
Can anyone roll their rollover link 180 degrees?
J_J
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Finally found the picture of the two roll assembly's for comparison. Big difference. The new one was disappointing, as I had to compensate for the roll over angle. The straight one was better.
http://www.tractorbynet.com/forums/...-pt425-lift-arm-center-link-tilt-assembly.jpg
http://www.tractorbynet.com/forums/...-pt425-lift-arm-center-link-tilt-assembly.jpg
Woodlandfarms I just thought about something that maybe hasn't been mentioned. I'll describe something that happened to me this winter while I was clearing up some brush and trees that had fell during a bad snow storm that we had. While I was pushing the limbs one of them climbed up the loader arms and I figured that it would just roll over as I pushed. I was wrong in my assumption instead of it rolling over it climbed up and over the back guard on my forks[I welded a back plate on my forks to stabilize tall loads] any way when it dropped off of the back plate guard the limb had a broke off limb on it and the stub of that broke the windshield of my cab, I saw it falling and the stub pierce the windshield.
Maybe in some of your doings something like a big limb maybe got between the cylinder and the loader arms or the uprights of the rollover link binding the cylinder and loader arms or rollover arms just enough to start a slight bend and as you used the machine the bend in the cylinder gradually got worse and worse until it finally gave way.
I have seen the same very thing happen on other machines and ruin cylinders. I made a quick attach plate for my 425 and before I used it I carefully watched it as I ran it through it's movements and I saw where it would hit the loader arms before it made a complete stroke, I took it back off and cut some more metal from it until it would work right. Had I just put it to use without checking it I probably would have bent something.
Someone else on the forum made a quick attach mounting plate and I made mention of that because it looked like it would hit the arms also sure enough they said that it would hit had they not corrected it. Yours might have been an unfortunate accident where something got between the moving parts and the cylinder was the weak link.
Maybe in some of your doings something like a big limb maybe got between the cylinder and the loader arms or the uprights of the rollover link binding the cylinder and loader arms or rollover arms just enough to start a slight bend and as you used the machine the bend in the cylinder gradually got worse and worse until it finally gave way.
I have seen the same very thing happen on other machines and ruin cylinders. I made a quick attach plate for my 425 and before I used it I carefully watched it as I ran it through it's movements and I saw where it would hit the loader arms before it made a complete stroke, I took it back off and cut some more metal from it until it would work right. Had I just put it to use without checking it I probably would have bent something.
Someone else on the forum made a quick attach mounting plate and I made mention of that because it looked like it would hit the arms also sure enough they said that it would hit had they not corrected it. Yours might have been an unfortunate accident where something got between the moving parts and the cylinder was the weak link.
OP
woodlandfarms
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Wow, that is one heck of a difference.
But all in all, it has to be me. No limbs or twigs got up into the machine from the point the new cylinder went on to its untimely bend.
I have been slammed as we are only a few days away from the first day of filming so no pix yet but I will get them asap.
Carl
American Bulldog
Gold Member
I just noticed today on my 1460 that if the grapple is all the way open, it hits the connecting rod on the roll over linkage when it is rolled back. I am sure slamming the two together is not a good idea, and can lead to bent cylinders and what not, so I will have to be careful.
