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Just dawned on me

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wallacedw

Member
I have had problems with the Farmall 400's hitch hydraulics. It occurred to me that to rule out everything but the cylinder, all I have to do is hook up to a different cyinder and see what happens. So what implement would have enough weight to duplicate the weight of a 1200 lb bale?

A little background. My tractor's 3 point hitch won't lift a round bale of hay and it doesn't lift the front end up. There are leaks but nothing sprays out. I am showing 1000 psi (the minimum is 900 according to the shop manual) on a pressure guage.
 
I don't know what implement would weigh 1,200 lbs. To get the lift you need, it may be as simple as changing the cylinder. Say you're using a 3". Going to a 4" almost doubles the lifting capacity
 

Hooking it up to anything that uses the hydraulics would give a good indication of whether or not it is functioning properly. A weak pump or defective by-pass valve should be evident on all but the smallest of hydraulic loads. Also, are you sure those bales weigh just 1200 pounds?
And, are you getting you bale forks stuck all the way into the bale, so that the bale is as close to the tractor as possible? It does make a difference.
 
How big is the 3pt cylinder? if inside diameter is 1" then 1000 psi generates 785lbs...not including friction losses. at 1.5" 1767lbs.
 
The weight question I just don't know. It is what the baler said but who knows.
I am thinking it could be a leverage issue as the forks stick out quite a bit from the actual cylinder. Maybe 3 feet which I know is going to considerably lessen the weight lifting ability.
Even if it couldn't lift the bale because it is overweight it should lift the front tho, right? It won't. The only thing I have with a different cylinder is a small one way that lifts the sickle blade on the mower.
 
Can you put too big a cylinder on? I think I saw a 4 inch with a 2 inch rod.... and what kind do you get? The original on it has the line connections coming out the top of the cylinder. Where do you get ones like that?
 
A larger cylinder means it will operate slower. It's probably also more like to break things, but unless you start trying to lift heavier stuff, I don't see that as a problem.
 
The measurements where 3 1/2 diameter on the cylinder and 1 1/8 on the rod. 8 inch stroke.
At 3/4 throttle she will lift herself up to change/move a tire around.
So maybe the cylinder is just not big enough to do what I am asking it too?
 
Not necessarily. if the distance from the cylinder to the rear axle is a lot shorter than the distance from the center of mass of the tractor to the rear axle, I doubt it would lift the front.
 
Yes it does. There hasn't been any really heavy load on it but I can check that. I will put my grader blade on it and lift it all the way up tonight and check it in the morning.
 
My 300 Utility(albeit a much smaller tractor) will easily lift the front of the tractor if I put too much load on the fast hitch. It will also lift the entire back end off the ground easily with down pressure.
 
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