Sickle bar mower

Farmall Super A, AV, 100, 130, & 140 1939 - 1973

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Welderman2020
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Sickle bar mower

Postby Welderman2020 » Tue Sep 07, 2021 4:03 pm

Good evening everybody, so I managed to modify a c22 sickle bar mower to be functional on my Farmall a, wellalmost functional. It seem that I don't have enough rpm at my pto to get the cutting head up to an acceptable speed for cutting as it binds up quite quickly and won't cut. Any opinions or at vise would be highly appreciated

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Don McCombs
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Re: Sickle bar mower

Postby Don McCombs » Tue Sep 07, 2021 4:10 pm

What size PTO pulley are you using? How about posting a photo of your setup from different angles?
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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
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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
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Re: Sickle bar mower

Postby inairam » Wed Sep 08, 2021 5:36 am

The PTO on the A-140 is 540 ptos less than 1/3 the rpm of the CUB so you need to increase the circumferences of the pulley by over 3 times.

It also may be too much torque for the c-22. If the mower jams with a branch or something hopefully the pitman arm is the first toe break.
When you only have 9 horsepower you need to know the names of all of the ponies!

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Re: Sickle bar mower

Postby Super A » Wed Sep 08, 2021 6:39 am

inairam wrote:The PTO on the A-140 is 540 ptos less than 1/3 the rpm of the CUB so you need to increase the circumferences of the pulley by over 3 times.

It also may be too much torque for the c-22. If the mower jams with a branch or something hopefully the pitman arm is the first toe break.


Other than the brackets that bolt it to the tractor, the rest of the C-22 is basically identical to the A-22, in fact everything from the wooden pitman to the end of the cutterbar is 100% identical. It shouldn't be an issue.

Welderman2020, Find a pulley for an A-22 mower on a Super A--140, or fabricate one. It's about 6-8" in diameter and fits a 540 PTO.

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inairam
5+ Years
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Posts: 2041
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
Memberships: Rough and Tumble Engineers Historical Association;Chapter 8 IH Collectors; IH Collectors Worldwide
Circle of Safety: Y
Location: Glen Mills PA

Re: Sickle bar mower

Postby inairam » Wed Sep 08, 2021 9:02 am

c-22 and the a-cc are basically the same? Did not know that.
When you only have 9 horsepower you need to know the names of all of the ponies!

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Don McCombs
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Re: Sickle bar mower

Postby Don McCombs » Wed Sep 08, 2021 9:25 am

inairam wrote:c-22 and the a-cc are basically the same? Did not know that.

As Al said, all the mounting bracketry is significantly different.
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Jim Becker
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Re: Sickle bar mower

Postby Jim Becker » Wed Sep 08, 2021 11:07 am

Super A wrote:
inairam wrote:The PTO on the A-140 is 540 ptos less than 1/3 the rpm of the CUB so you need to increase the circumferences of the pulley by over 3 times. . . .

. . . Welderman2020, Find a pulley for an A-22 mower on a Super A--140, or fabricate one. It's about 6-8" in diameter and fits a 540 PTO.

The driven pulley on an A-22 is smaller than the one on a Cub-22. Changing the drive pulley from 4 or 4-1/4 inch to one that is 6 or 8 only gets you half way there. Getting enough speed by only changing the drive pulley will require one at least 12 inches in diameter.

Then you have clearance problems for the pulley. Then the belt will be about a foot too short and possibly not heavy enough for the load (5 or 6 times the original force).

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Don McCombs
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Tractors Owned: "1950 Something" Farmall Cub
1957 Farmall Cub w/FH
1977 International Cub w/FH
1978 International Cub
1948 Farmall Super A
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Location: MD, Deep Creek Lake

Re: Sickle bar mower

Postby Don McCombs » Wed Sep 08, 2021 2:16 pm

Jim makes a very good point. I had forgotten about the smaller pulley on the longitudinal driveshaft.

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Matt Kirsch
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Re: Sickle bar mower

Postby Matt Kirsch » Wed Sep 15, 2021 9:27 am

As I recall the driven pulley on the mule drive threads on. The PTO on the Super A turns the opposite direction, the "unscrew" direction for a Cub pulley.

Not saying you necessarily will have a problem but you MAY have a problem with the pulley unscrewing from the mule drive.

Do I still have an A mule drive at home? I just might. A couple of years ago I pieced together a complete A-22 mower from parts I'd acquired over the years, then almost as soon as I sold it, I bought another pallet of 22 mower parts at an auction for $10. I think there's an A-22 mule drive in my barn that you are welcome to if we can get it Cub Expressed. Need to clean out as I'm selling the place.


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