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Farmall & IHC Tractors Discussion Forum
Show Parts for Model:

Super MTA pto trouble

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thad

02-14-2018 06:07:51




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The pto seems to squeal when the brake is applied and the lever is pushed forward. I assume its out of adjustment but by the book its set about right. Any trips on what I need to do. Its the band style pto unit.




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Janicholson

02-14-2018 08:07:05




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 Re: Super MTA pto trouble in reply to thad, 02-14-2018 06:07:51  
The linkage on well used PTOs on the band style PTO become dysfunctional after years of use.
Two suggestions:
Make very sure there is no lost motion in the hand lever pivot and rod mechanism. Be certain the hand lever moves the PTO lever from the middle both ways.
Adjust it like this, after there is no play in links.
Move the lever exactly half way between the locked on position and locked off position (little flipper catch on lever.
Take off the little dome metal cover from the adjust screws.
Loosen the jamb nut, and tighten the front (away from you) screw until it is just a bit tighter than the point at which it begins to feel tighter as it is screwed in (maybe a eighth turn) then back it off until the PTO shaft will turn with least drag (about 3/4 turn out) and tighten the lock nut while holding the adjuster.
Do the same for the closer adjuster.
If the screws go into the jamb nuts and get flush with the top surface of the nut, the bands are probably worn out, and may be operational for a while, but plan on a rebuild.
Now (tractor off) push the the lever down toward the brake footplate. As it goes down, it should get harder to push when it is about 4" (or so) away from fully OFF. and be noticeably harder to push for the last inch, but not real hard. (this is the brake band tightening on the drum in the PTO unit.
Then pull it up and do the same feel.
The ON position should feel the same way.
The shaft should turn pretty free when the lever is half way, and not at all when in either ON, or OFF. (tractor shut off)
If it slips now, it needs a rebuild. Jim

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Mark in Upstate

02-15-2018 09:34:12




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 Re: Super MTA pto trouble in reply to Janicholson, 02-14-2018 08:07:05  
Hi Jim,

On my 450:
I have gone through the procedure outlined in the repair manual for adjustment of the PTO.
I have a squealing when I lock the PTO. The shaft does not rotate when locked out. I have replaced the shaft seal and fluid a couple of times(Hy-tran) after rebuilding the power 281. I don't like running it with the squeal so I let the PTO run. Thank you for your knowledge.

Mark

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Janicholson

02-15-2018 12:44:34




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 Re: Super MTA pto trouble in reply to Mark in Upstate, 02-15-2018 09:34:12  
Loosen the drive band 1/2 turn on the screw. If it still drives and does not squeal Cool. If it slips, you may need to do what you are doing. I would put a cylindrical guard over the spinning shaft for safety. A 6 inch piece of exhaust pipe and a bolted on bracket would do it. Jim



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farmall450man

02-14-2018 11:19:07




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 Re: Super MTA pto trouble in reply to Janicholson, 02-14-2018 08:07:05  
Few people talk about it, but the fluid should be Hy-Tran and changed once and a while.



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