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Farmall & IHC Tractors Discussion Forum
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Intl 784 PTO Clutch installation

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Shaler

03-03-2020 18:42:40




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The 540 PTO on my IH784 was slipping under load. I suspected it was a worn PTO clutch. I removed the PTO clutch pack which was actually very easy. I ordered a set of replacement discs from this site. I removed the old discs and installed the new ones in the PTO clutch pack. I then installed the clutch pack in the 784. It was not too terribly tough, except I did have trouble getting the roll pin reinstalled, but I eventually did. Now comes the fun part- the PTO shaft will not turn when the PTO lever is actuated. When the tractor is shut off, the PTO shaft can be turned by hand 180 degrees in each direction just like before. However once the tractor is started and idling, the PTO shaft will not move at all if the PTO lever is actuated, AND ALSO will not move at all if tried to turn by hand. Any suggestions on where I screwed up from you guys that actually know what you are doing.

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caterpillar guy

03-04-2020 01:07:45




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 Re: Intl 784 PTO Clutch installation in reply to Shaler, 03-03-2020 18:42:40  
Since we are not there I can just guess. ARe you sure you did not nick any of the o-rings in the process of assembly? The brake is probably what is holding it now that you have it together. You need something like 240-300 psi for the clutch to work without slipping. There is a place down on the MCV you have to put a gauge into it threads in then you have to adjust the pressure. This has been 40 years since I was around doing that on a 574. We had a hose and the fitting so we could look at it during use after the first one went out 40 or more years ago. Your 784 is just a newer model of the 574 with a bit more horse.

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