Is "breakout force" the amount a loader will lift?

[sixdogs]

Dumb question but I've always wondered how much my Deere 5520 with 541SL loader will lift. It's a lot because several times I've lifted more than I thought possible. In the site shown below the data is listed for the 5520 tractor with 541 loader and "breakout force" is listed at 4125 lbs. I have a self leveling loader and I think that's the "MSL" listing. Is breakout force how much it will lift?



TractorData.com John Deere 5520 tractor attachments information

 

[GPintheMitten]

No. Breakout force is the curling up of the bucket. It uses different cylanders than yhe lifting arms. Typically the breakout force is more force than the lifting arms.

 

[SPYDERLK]

Breakout force is how much the loader will lift off the ground. Lift force diminishes as height increases. Breakout is sometimes speced at the pins ... sometimes at a defined point in the bucket.

 

[k0ua]

And yet for even one more answer, Breakout force is the combination of the lift cylinders and the curl cylinders both operated at the same time at ground level to break out of the pile. Sometimes measured at the bucket lip, sometimes measured at the pins...

As 10 tractor geeks what breakout force is and you WILL get 10 different answers.

 

[the old grind]

.. Breakout force is the curling up of the bucket. It uses different cylanders than yhe lifting arms. Typically the breakout force is more force than the lifting arms.

I've always interpreted or read in FEL's OM to be just that & don't recall ever seeing a 'breakout force' rating not well above 'lift at pins' or similar to any height. When digging into a well settled pile to a near stall, the bucket will usually curl when the loader won't lift. Isn't that what breakout is?

btw, I've been grubbing brush & saplings with 800lb (lift) rated FEL. When the 'lift' runs out of muscle (and apparently better than revving any higher) a curl of the bucket will consistently 'git 'er done' , ... or lift the rear wheels.

What's interesting to note is that the 'boost' comes with cylinders retracting vs extending. :scratchchin: tog

on edit: James, ok you won that race. (I'd say BOF is measured at the lip ... and lift cylinders presumably locked when not actuated ... )

 

[SPYDERLK]

And yet for even one more answer, Breakout force is the combination of the lift cylinders and the curl cylinders both operated at the same time at ground level to break out of the pile. Sometimes measured at the bucket lip, sometimes measured at the pins...

As 10 tractor geeks what breakout force is and you WILL get 10 different answers.

How can u do a combination on a measure at the pins?

 

[SPYDERLK]

I've always interpreted or read in FEL's OM to be just that & don't recall ever seeing a 'breakout force' rating not well above 'lift at pins' or similar to any height. When digging into a well settled pile to a near stall, the bucket will usually curl when the loader won't lift. Isn't that what breakout is?

Lift from a pile at ground level moves the bucket forward as it rises. ... A pretty tuf task if youre pushing too.

 

[k0ua]

How can u do a combination on a measure at the pins?

that would be kinda hard wouldn't it?

 

[Leejohn]

Say when I'm in a pile of wet clay and the boom well not lift up, also it well not curl. Now if I let weight off of the boom and curl at the same time using the back of the bucket as a pry bar the rear well come up or it brakes loose from the pile. What would you call that.

 

[SPYDERLK]

Say when I'm in a pile of wet clay and the boom well not lift up, also it well not curl. Now if I let weight off of the boom and curl at the same time using the back of the bucket as a pry bar the rear well come up or it brakes loose from the pile. What would you call that.

It sure seems like it oughta be called breakout, but as an incident rather than a known force.