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Hydraulics?

R

Ricksch

New User
I have a 1940 Farmall M. It has a loader with manure bucket. Works great. This last weekend I put a bale fork on and it only lifts about 6" (They are large bales) Is my pump not what it once was?
 
1 Have you used a bale fork on this tractor before?
2 With this size bale?
3 You could be low on fluid.
4 None of us are what we once were, but 15w50 in the pump reservoir makes the pump think it is young again, and I've seen no problems for several years doing this.
 
If you plumb a pressure gauge into the lift lines you can see what the pump is putting out. the bales you want to move may just be too much for the tractor.
 
(quoted from post at 13:33:14 04/27/09) If you plumb a pressure gauge into the lift lines you can see what the pump is putting out. the bales you want to move may just be too much for the tractor.
Click to expand...
What is the system pressure supposd to be? Is there a relief valve that can be shimmed up if the pressure is low? Going to a higher viscosity fluid will help some, but if the pump is worn and bypassing internally, all it's going to do in the long run is build more heat in the hydraulic system.
 
How much pressure should I hope for? Also after reading the replys to "Hydraulics please explain" My tractor had an added control for the hydraulics when I got it. Would I be better off using just the control rod on the tractor. I have no need for a two way or mult. control. I only have the lift and trip for the bucket.
 
There are two pressures belly pumps are designed for and I don't remember them. Somebody will chime in. You should be getting at least 700 psi if I recall.

You might try taking your two way valve out, it could be bypassing.
 
The relief valve is internal to the pump, and is a ball and spring. Replacing a corroded ball might help a lot as well if that is the problem. Shimming the relief valve does no good if it is OK to start with. Higher viscosity oil does help with worn pumps.
 
the early pumps were low pressure, i dont remember right off hand, but i think they were in the 600 to 800 psi rating, the later pumps were around 1000 psi. with that old of a tractor, i bet it has the lower pressure pump in it.
 
Old pumps around 400 psi, newer pumps around 800 to 850 psi.


The live (distributor) pumps were around 1200 psi.

Neither of these is really enough to lift the large round bales people make these days...
 
I never owned an M but I was waiting for someone else to say it. I doubt the M could handle a big bale. You never stated what size bale it was? 5', 5.5', or 6'? And how heavy does the guy who baled them say they are?

I don't think you have enough weight in the rear end to pick one up and move it around even if you had enough hydraulic lift to pick up a bale. Probably not even if you tied on to your plow on back.

I pick up the 6' 1500# bales with my 2606 and IH3000 loader and move them around. Not sure I could have done it with my previous 460 with a manure bucket. Manure buckets are worth about what they are made for - manure!!

5' bales are still probably around a 1000 to 1100#.

When I couldn't pick them up with my old 460, I'd slide the manure bucket under the bale and tie it on with a chain. Then pull or push it into the corral.

Hate to see you spend a bunch of bucks on something impossible. Guess I'll wait to here from others on this.
 
I would expect that you would need 2000 psi to lift the bales.

Sounds like a bigger/newer tractor. A big bale is a lot of weight out there. It is a good load to put on the front of a 4020.
 
(quoted from post at 18:58:01 04/27/09) I would expect that you would need 2000 psi to lift the bales.

Sounds like a bigger/newer tractor. A big bale is a lot of weight out there. It is a good load to put on the front of a 4020.
Click to expand...

The new big round bales are more than a 1256 can handle as we broke several front end pieces on ours before finally upgrading to a 4450 MFWD that was better designed for the weight and stress of large round bales.

About the biggest bale I would want to tackle with an H or M would be about five feet wide by four feet tall, any bigger and your asking for breakage.

FWIW, our 60" tall by 60" wide bales weigh between 900 and 1250 lbs depending on the crop. We purchased a load of 72" tall bales that weigh around 1800 lbs that make the 4450 grunt... never again.
 
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