M Farmall Lift Capacity

Rob Maloney · Apr 27, 2011

I recently bought an M with an add-on 3 point hitch with dual cylinders (not a Saginaw). I'm assuming the hydraulic pressure is being supplied by the Lift-All pump, as there is no other pump on the M. My question is, how much weight should I expect this set up to lift? I do know that it will not lift a round bale of hay (about 1000 pounds), but it will lift a MF 8 foot tandem disk. My little Ford 600 will lift the bale. Am I expecting too much, or is the Lift-All with 3 point not living up to its full potential. I have no pressure gauge or access to one, either. Thanks.

old · Apr 27, 2011

Very hard to say because there are a lot of variables there. If the hyd system is working as it should be you have around 1200psi. So if you have say a 1 inch cylinder or even a 2 inch you may not have enough power to lift a bale. Also things like the pivot points make a difference as to how much lift it may have

Rob Maloney · Apr 27, 2011

Thanks for your reply. Seems like I read in a manual that the Lift-All pump only had a capacity of 850 psi. The cylinders are small (probably 2"). Would larger cylinders command more lift, even if the pump is maxed at 850 psi? Thanks.

Zachary Hoyt · Apr 27, 2011

Yes, hyd lift power is a function of PSI x area, so more area equals more lift. It is also slower, as the same pump has a bigger area to fill with oil.
Zach

Wardner · Apr 27, 2011

(quoted from post at 01:40:16 04/28/11) Thanks for your reply. Seems like I read in a manual that the Lift-All pump only had a capacity of 850 psi. The cylinders are small (probably 2"). Would larger cylinders command more lift, even if the pump is maxed at 850 psi? Thanks.

Lifting force increases by the square.

2x2=4
3x3=9

consequently, 9 divided by 4 equals 2.25 as much lifting power.

You could also use only one 4" x 8" cylinder and get 2 times the lifting capacity out of the hitch which I presume is a Worksaver brand. 2 ea 3" cylinders or one 4" should lift the bale but it depends where the adjustable lift links are attached to lift arms. I believe there are three holes/positions.

old · Apr 27, 2011

Yep bigger cylinders mean more lift. So if you have 2 inch cylinders now in theory 4 inch ones would double the lift you have but it will also slow down the lift speed but the same factor

soybeanjoe · Apr 27, 2011

I seem to recall that 850-900 psi is the working pressure for a belly pump. I think the Stage 2 SMs with live hyds had 1,100 - 1,200 psi. I know my SMTA puts out just a little over 1,100 psi.

Red John 2 · Apr 27, 2011

Rob, I have a 3-point with two 4" cylinders on my 42 Farmall M. I can easily lift 1000 lb bale using a 2 prong bale fork. If I need to do some serious lifting, I remove the fork and install a drawbar in its place.(Do this to get closer to rear of tractor with the item being lifted). By installing a front weight frame along with weights will enable you to lift about whatever you want. Bye the way, my lift speed is plenty fast enough for me.
Oh, the 2" cylinders you have now are way too small. You will not be happy till you get larger cylinders. Tractor Supply Co. and others have them... about $100 each.

Wardner · Apr 28, 2011

[i:654c4848f0]So if you have 2 inch cylinders now in theory 4 inch ones would double the lift[/i:654c4848f0]

That statement is totally wrong. Moving to a pair of 4" cylinders will quadruple the lift as compared to a pair of 2" cylinders.

mkirsch · Apr 28, 2011

If the hyd system is working as it should be you have around 1200psi.

An M's belly pump puts out around 800PSI if it's in excellent condition.

There's a member on here who, IIRC, lifted a C-sized tractor with his Saginaw hitch on his H, which is like 3000lbs.

With two 4" cylinders, you should be able to lift so much that you'll break the tractor.

Hydraulic pressure gauges are fairly inexpensive. Harbor Freight sells the gauge in their stores for less than $20. All you need is a Pioneer male connector and a bushing to adapt the two together.

old · Apr 28, 2011

Not totally wrong since it does in fact increase lift ya I may be wrong as to how muchj of an increase but it does increase lift so it is only partly wrong

NawlensGator · Apr 28, 2011

Go get two 4" cylinders and lift your house off the ground.

Wardner · Apr 28, 2011

Sorry, Old,

If I was your sixth grade math teacher, you would get zero credit for that wrong answer. No partial credit.

old · Apr 28, 2011

Ah but when I was in school this type of math would have been either 11th or 12th grade depending on if you even took that area in math. Been many many many years since I did that type of math and I probably got got more then a lot of people ever learned. Either way the thing here that really mattered was he was asking how much lift he should have and a way to maybe increase it numbers here do not really matter much since this is a tractor not a rocket heading to Mars

M Farmall Lift Capacity

Rob Maloney

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