Silly T2220 loader question

[drag_slick]

This spring I upgraded from a Kubota BX1850 to a NH T2220 with supersteer. The loader has a quick attach and a 68" bucket. Huge difference, and made my snow removal much less of a battle.

What I noticed is that with the Kubota, if it couldn't lift something, it wouldn't even budge it off the ground. I was moving boulders with the boomer and there were boulders it would lift but then stop about 3' off the ground, seemed to hit the relief on the pump or something.

Rears are not loaded and I had a ~450lb tiller on the 3ph for ballast, tractor showed no signs of the back end lifting.

Just wondering if that's normal or should it be able to lift higher?

 

[thclimer]

I'm sure others with more knowledge than I will post soon, but my guess is that you found the "sewwt" spot or rather the "sour" spot. By that, I mean once you were 3' off the ground it took more force to continue to raise the load, up until you hit the 3' high mark you were probably very close to your tractor's limits and you were not going to go any higher.

When I lift items, which appear to very heavy I tend not to lift them very high being that it becomes a stability issue especially if your not on level ground and where I live nothing is level for very long. I have however experienced what you did in the past.

Glad you are enjoying your New Holland.

 

[J_J]

In some cases, if you are lifting a level load, and you can not lift anymore, then curl the bucket up/back and that will change the center of the lift point, and may allow you to lift higher. As you lift higher, you are bringing the load closer to the tractor.

 

[jimmysisson]

Mine is the same. I always thought it had to do with the geometry of the pivot locations vs. the piston location. The piston would have the most leverage on the loader arm if the lower piston pivot stayed perpendicular to the lift: like tangent to the arc of travel of the upper piston pivot. Of course that would put the piston in the way of the front tires. And the lower pivot would have to move forward as the loader raised.
I actually don't understood how modern loaders even lift anything, with their lower piston pins up so close to the loader arm pivot pins. It's a compact assembly, but doesn't seem to have leverage enough to lift a load.
Jim

 

[J_J]

Do you know your loader lift limits?

Have you check the PRV relief?

Do you know your pump pressure?

By knowing these things and setting the PRV you will be at at or close to manufacturer design.

The compromise on the cyl, pump, and cyl pin location is designed with a safety factor.

You may have the ability to modify the setting, add some weight to the back, and
be able to lift more, but do so at your own risk, as in front end strength, etc.

But anyway, check the PRV psi.

500 psi difference using a 2 in cyl, 1 in shaft, will change cyl force 1571 lbs.

 

[drag_slick]

Just an update, had the tractor in for a leaky HST cooler and asked them to check the PRV on the pump, all they told me was it's "in spec".

Was helping with some flood cleanup this weekend moving sandbags so I took the opportunity so see what the loader would lift since I could weigh the bags.

I had 1467 lbs in the bucket before it hit the PRV at about 4' off the ground, that's where I stopped testing, and I'm very happy with that. :thumbsup:

Just a curiosity thing on my part I guess.