Hydraulic Cylinder Question

I purchased a 12' Kewanee Wheel disk. I do not have a model #. My question is what size of Hyd. Cylinder should use on this disk? What is the correct stroke length to use? The wheels are inside of the frame that goes around the disk. Thanks
 
a standard 'farm' cylinder. 3" x 8" stroke.Most farm equipment is designed to use a common 8" cylinder. Get one from tractorSupply,or other farm store.
 
The bigger the diameter the easier it will lift. A 3-1/2 lift easier than a 3 and so on. I would use a 3-1/2 or 4 inch as then if I needed more size later it would already be there. Surplus Center is pretty reasonable on cylinders. TSC is not cheap place to buy anymore.
 
We pulled a 12 ft Kewanee disk with our Super M-TA, our 450, and a 4010 Deere. Had a 3-1/2"x8" stroke Think it was a Char-Lynn cylinder for the SM-TA & 450, and think the Deere cylinder was a 4"x8", both cylinders, all three tractors lifted the disk easily. Disk cylinder is the same standard size most trailing plows used. Bigger cylinder slows the lift a bit, allows raising the disk, plow, whatever just a tiny bit easier, smaller cylinder lifts whatever faster, but makes it harder to just raise something a tiny bit. Larger bore cylinders cost more, small bore cost less.
We used a 2-1/2"x8" cylinder plumbed for 1-way hydraulics with our Super H, lifted the Deere 490 planter fine, 6 ft Brillion rotary mower, it REALLY struggled to lift the 4 row rotary hoe the neighbor converted his first Anhydrous Ammonia applicator to pull and lift. 4" cylinder would have worked fine.
Cylinders on our IH frt mounted IH 455 & 461 cultivators were 1-1/2" bore x 16 inch stroke. Not much weight there to lift.
 

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