Explanation of Kubota LA1353 loader specs

[bunchgrass]

I have a M8540 w LA1353 loader and need to unload and place some retaining wall blocks (we called them ecology blocks back in the day) - 46”x18”x21”. Looking at the spec sheet for my loader I see 2 sets of capacities (not pin placement). One says capacity bucket center. The other says pivot pin. The diff is like 1000#. So what’s the diff? How can I lift at the pivot pin? Which pivot pin?
Specs from here:

Kubota LA1353 Loader Specifications

Kubota LA1353 Front End Loader Specifications

tractorgearbox.com

 

[RickB]

Pivot pin is at the outer end of the loader boom.

 

[Jchonline]

Yes basically the point before your attachment starts (bucket, etc). This measurement really isn't practical because weight has dimensions. As you mentioned 48x18x21 so you are looking at that weight distributed from the pin out at least 18 inches. The further you get away, the more your capacity goes down.

Technically If you had a chain or way to suspend the full load right under the pivot pin, you would get that capacity. However, that would mean the loader has to be at least a few feet off the ground, which diminishes your capacity....fun isn't it!

What do the blocks weigh?

 

[Rustyiron]

@ 150#/cf, (concrete) x 10.5 c/ f =1575# approximately.
(Very fast math )

 

[Farmer495]

I handle 500 kg ( 1100 lb) fertilizer bags easily with LA1153E loader on a M7040SU tractor, pins set on "power" not "height" I use tine bucket and keeps my load about a foot in front of the pivot pin, I lift them and suspend over fertilizer spreader so does it at height.......the bigger LA1353 should play with 1575lb. The bigger farmers get the 2200lb/1000kg fertilizer bags....

 

[oosik]

There is one way to find out ......... Just be sure you have plenty of counter weight on the 3-point.

"Talk is cheap - action pays the bills"

 

[Jchonline]

@ 150#/cf, (concrete) x 10.5 c/ f =1575# approximately.
(Very fast math )

PFFT thats nothing. Go for it.

 

[Smokeydog]

The back of pallet forks is close to the pivot pin. Rollback curl can provide a little extra lift. Had some logs I couldn’t lift but could curl off the ground.

 

[bunchgrass]

PFFT thats nothing. Go for it.

Hmm - I originally asked this because I read the blocks weighed in at near 3000# but rechecked and it is closer to 1600-1800. Maybe I confused it with the actual ecology block weights which are larger (4x2x2?).

Thanks for the responses. I just didn’t want to get home with a load of blocks that I couldn’t get off the trailer!

 

[sea2summit]

Hmm - I originally asked this because I read the blocks weighed in at near 3000# but rechecked and it is closer to 1600-1800. Maybe I confused it with the actual ecology block weights which are larger (4x2x2?).

Google says a 4x2x2 concrete block is about 2400#, depending on how close you can keep it to the pins you should be able to lift it but I wouldn't want to have to maneuver with it or drive over any rough terrain.

 

[CoyPatton]

Pivot pin is an almost useless spec. The pivot pin is the pin to the bucket (if a pin in bucket) from the loader arm (typically the bottom 2 pins) the point of the hinge for the attachment.
I say this is a useless spec as most loaders now and gave for several years came with some type of quick attachment system—the most popular probably being the SSQA, which moves the load even further from this pivot oin point.
A more useful spec is the 50mm in front of the pivot pin. This is just over 19.5 inches often rounded to 20”. It is often near the front/cutting edge of the bucket. But still this is a limited usefulness spec as if you put a set of pallet forks on, this tells you little. Additionally, if using a bucket, you have material from the back wall to the cutting edge, so you can lift more weight than that spec but less than the pivot pin spec.
Additionally engine rpm will effect the flow rate of hydraulic fluid and thus to some extent your lift capacity.

 

[RickB]

5mm is a long ways from 19.5" Hydraulic flow has nothing to do with lift capacity, hydraulic pressure has everything to do with it.

From a practical standpoint lift at the pins is not a user friendly spec.
From a comparative standpoint it is the easiest, most consistent and reliable indicator of loader capacity using only components that are standard equipment on every FEL built regardless of brand or model. That's why we will continue to see it as frequently as we do. It's nearly useless in determining the capacity of a particular loader but invaluable when comparing between loader models.

 

[CoyPatton]

5mm is a long ways from 19.5" Hydraulic flow has nothing to do with lift capacity, hydraulic pressure has everything to do with it.

From a practical standpoint lift at the pins is not a user friendly spec.
From a comparative standpoint it is the easiest, most consistent and reliable indicator of loader capacity using only components that are standard equipment on every FEL built regardless of brand or model. That's why we will continue to see it as frequently as we do. It's nearly useless in determining the capacity of a particular loader but invaluable when comparing between loader models.

Sorry dropped the zero,should be 50mm as most recognize, but if possible I will edit for you!
I will give you that pivot pin spec is useful in comparing between loaders via my statement ‘almost’ useless. The remainder of my rant stands as ranted! It tells you nothing about the loader.
And I disagree on flow having no effect on lift capacity! Static pressure remains in a constant state. Flow is what generates work from the pressure. While it takes both pressure and flow to generate action, you affect flow with ‘operating’ rpm’s much more do that the pressure. Pressure is created more from restriction if flow that rpm’s. While you can change that restriction, it requires action that is not going to happen from the operators seat.

 

[ptsg]

Sorry dropped the zero,should be 50mm as most recognize, but if possible I will edit for you!

Nope, it really should be 500 mm.

 

[CoyPatton]

Nope, it really should be 500 mm.

Ok unlike you I’m human!

 

[RickB]

Ok unlike you I’m human!

I'm not going to attempt to teach you hydraulics beyond this nugget. Any flow rate above zero will provide exactly the same force at a given pressure. Increasing pressure at a given flow will increase force at linear rate.

 

[Rustyiron]

Check me Rick
But flow does change things when dealing with hyd motors and available HP.

 

[RickB]

Check me Rick
But flow does change things when dealing with hyd motors and available HP.

We're not discussing hydraulic motors or HP. If we were you would be correct and my comments would have been very different. Horsepower is a function of pressure (torque) and flow (speed) when rating or sizing hydraulic motors. Loader lift capacity specs don't take speed (a function of flow) into account.

 

[Midniteoyl]

Difference in capacity verses high and lift point:

And, the need for proper ballast:

 

[CoyPatton]

I'm not going to attempt to teach you hydraulics beyond this nugget. Any flow rate above zero will provide exactly the same force at a given pressure. Increasing pressure at a given flow will increase force at linear rate.

But happen at a snails pace! Try to put it claim to work in the real world nit to slide ruler dreams.
At idle lift that load near max capacity. Then lift it at 540 pto rpm where everything is rated at. Bet you get very different results. Are you man enough to let life meet the road?
Will you admit the difference? I have a prediction!