PTO versus transmission in gear...

Farmall Super A, AV, 100, 130, & 140 1939 - 1973
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cheapohubby
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PTO versus transmission in gear...

Postby cheapohubby » Tue Oct 17, 2023 3:47 pm

Hi all; just doing a bit of contemplation about what I might be able to do with the SA that's useful. One option would be a custom built offset mower to mulch/cut back the shrubs along our road. My question concerns how well a PTO drive will work while trying to drive forward. As I understand it, the PTO is in the same drive train as the transmission. So if the PTO is back driven by the inertia of the mower, it'll happily keep driving the tractor forward until you put it in neutral. Right?
I guess I'll need some kind of freewheeling clutch on the mower to keep it from back driving? Just checking before I overthink things.

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Dale Finch
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Re: PTO versus transmission in gear...

Postby Dale Finch » Tue Oct 17, 2023 6:56 pm

You might consider a self-powered offset mower...such as the Swisher line.

https://www.swisherinc.com/categories/trail-mowers.html?matchtype=p&network=g&device=m&keyword=swisher%20mowers&campaign=1683741303&adgroup=78553577513&gclid=Cj0KCQjw4bipBhCyARIsAFsieCxUC1PM2KBjqSqDBs4bcMwBzHQYb2ofEc3XbZdESVF6fNZcPJ0RW0IaAr6PEALw_wcB

This brand is rather expensive, but there are others, as well as used ones on places like Craigslist or FB Marketplace.
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Jim Becker
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Re: PTO versus transmission in gear...

Postby Jim Becker » Tue Oct 17, 2023 8:35 pm

Yes, inertia of an implement can drive a tractor through a transmission driven PTO. How big the problem is depends on the implement. A rough cut rotary mower can be pretty bad, a sickle bar type not so. There are overriding clutches that can be mounted on the PTO to handle that problem.

cheapohubby
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Re: PTO versus transmission in gear...

Postby cheapohubby » Wed Oct 18, 2023 11:31 am

Okay; so, not overthinking it. That's good. I was looking at maybe using a one way bearing (or multiple if it's too much torque for just one) to make something to eliminate the back-drive. Then the inertia of the flail would work in my favor.
I'd rather not go self-powered, because then it's an implement that will need to be stored indoors (we're on the ocean, so anything left outside will rust). Not to mention another engine to maintain.

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Re: PTO versus transmission in gear...

Postby Gary Dotson » Thu Oct 19, 2023 7:43 am

The pto overrunning clutch used to be available at TSC and such places, I don’t know if it still is or not but that would be a good solution. You might check EBay for one.

cheapohubby
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Re: PTO versus transmission in gear...

Postby cheapohubby » Thu Oct 19, 2023 11:54 am

Hmmm.... yeah, an overrunning clutch is probably the better solution. Found one at Agrisupply for $36US; just need to figure out shipping cost. Or I could get a PTO driveline locally from PrincessAuto that has one built in for $330CA.

inairam
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Tractors Owned: 1948 6v - Dozer
1949 with kub klipper belly mower. mag 6v - Mom
1950 with plow, 54 blade, mott mag 6v - Roxanne
1953 54 blade, c22, wood 42 6v
1957 6v - barn Queen
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Re: PTO versus transmission in gear...

Postby inairam » Fri Oct 20, 2023 7:14 am

I recently installed a pto clutch that looks like this

I do not think it is safe to run these with a big rotating inertial without one. You get pushed around a lot and can not stop where you think you will

I purchased a cheaper one and was not happy with it. this was on Amazon https://www.amazon.com/Tractor-Release- ... 08BGCB3HH/ but I think I got mine at northern tool
Attachments
ptoclutch.jpg
When you only have 9 horsepower you need to know the names of all of the ponies!

CharlieK
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Re: PTO versus transmission in gear...

Postby CharlieK » Fri Oct 20, 2023 1:34 pm

link does not work for me
get er done; life is good

inairam
5+ Years
5+ Years
Posts: 2794
Joined: Wed Jul 08, 2015 10:24 am
Zip Code: 19342
Tractors Owned: 1948 6v - Dozer
1949 with kub klipper belly mower. mag 6v - Mom
1950 with plow, 54 blade, mott mag 6v - Roxanne
1953 54 blade, c22, wood 42 6v
1957 6v - barn Queen
1965 lo-boy with c-3 mower 12 v - Loboy
1974 Horse II 12 v c-2
1975 with woods 42-6 12 v - Horse
1979 long strip 12 v stuck engine
130 with international 1000 loader 6 v
1969 140 with bush hog tow behind mower 12 v
Terramite T-6 4WD Backhoe Perkins diesel
Memberships: Rough and Tumble Engineers Historical Association;Chapter 8 IH Collectors; IH Collectors Worldwide
Circle of Safety: Y
Location: Glen Mills PA

Re: PTO versus transmission in gear...

Postby inairam » Sat Oct 21, 2023 1:32 pm

do a search on this "Tractor PTO Quick Release Clutch Over Running Coupler 6 Spline 1 3/8"
When you only have 9 horsepower you need to know the names of all of the ponies!


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