LA854 Lift Capacity Question on L5740

[texasjohn]

This is the voice of experience from the exact equipment...MHarryE, just wondering if you have ever had your hydraulic pressure tested? Mine, from the factory was about 400 lbs low...getting it adjusted to max spec made a very noticeable and usable difference.

 

[FatTire]

The front tire pressure is a big deal -- forgot about that once while picking up a 1835# roll of steel from a trailer, the sidewalls were crumpling to the point that I'm glad it (apparently) didn't damage the tires.

 

[slowzuki]

1. The q/a adds weight and pushes the load out.
2. The static friction of the pins and pivots makes a difference when close to the limit and its really hard to calc.

If you can't pick it the driver of the truck may charge you extra if you hold him up on his route.

I have had to half lift things, drag them back off the edge, tilt them to get my loader low enough with the forks rolled back to be able to lift but when you pull one that is too heavy you have to be ready to drop it too the ground.

If you're going to do it, test first get a pallet and load it up to at least 2100 lb and raise it to the height of a trailer. Not every trailer can dump the air to help you either so measure at ride height.

At 60" the la 854 will lift 2509 lbs 500 mm forward of the lower pins. And 3097 lbs at the pins I've done the free body diagram and have an equation you can use to estimate how much far out the center of gravity can be to lift a pallet at 60" for a given weight
Lw= load weight (lbs)
Dcg= distance of CG of load weight from lower pins (m)

Dcg = (6605 lbs x m/Lw) - 2.133 m

So a load weighing 2100 lbs
Could be lifted with a CG located 1.01 m forward of your pins which is just over 39".
Now assuming the pallets are loaded uniformly you would divide the depth by 2 and add the distance from the front face of your forks to the lower pin while the loader is level at 60" this distance changes with loader height.
If your pallet is 42" deep the CG would be 21" forward plus the fork distance to the pin say 10" for example would be a total of 31" less than the 39"
If the load was 2200 lbs Dcg is .87m 34"

This assumption does not include the weight of the forks but I think kubota includes the weight of the bucket in their calculations

I think there is a good chance you could lift it bassed on this

 

[texasjohn]

So, the experience forever affected your tractor nom de plume, right, FatTire?:tractor:

The front tire pressure is a big deal -- forgot about that once while picking up a 1835# roll of steel from a trailer, the sidewalls were crumpling to the point that I'm glad it (apparently) didn't damage the tires.

 

[xring100]

1. The q/a adds weight and pushes the load out.
2. The static friction of the pins and pivots makes a difference when close to the limit and its really hard to calc.

If you can't pick it the driver of the truck may
charge you extra if you hold him up on his route.

I have had to half lift things, drag them back off the edge, tilt them to get my loader low enough with the forks rolled back to be able to lift but when you pull one that is too heavy you have to be ready to drop it too the ground.

If you're going to do it, test first get a pallet and load it up to at least 2100 lb and raise it to the height of a trailer. Not every trailer can dump the air to help you either so measure at ride height.

2. The static friction of the pins and pivots makes a difference when close to the limit and its really hard to calc.
Since kubota determines the values for the loader at the limit I sure hope the pin friction is pretty similar

"The q/a adds weight and pushes the load out."
Yes I understand that's what i was trying to convey in this statement

If your pallet is 42" deep the CG would be 21" forward plus the fork distance to the pin say 10" for example.
As for the weight. The fork frame probably weighs less than the bucket and the CG location is probably similar to the bucket as most of the weight of pallet for frames are pretty close to the pins.

2. The static friction of the pins and pivots makes a difference when close to the limit and its really hard to calc. If you add 10-15% probably be okay.

Would definitely need to verify loader operating preesure is set near the limit.

I agree he should try something out first. But the calculation is a good guess at whether it's even feasible. Better than just guessing. He never mentioned the pallets depth as that plays into it big time.
I didn't say it would or would not as I was only giving an example that he could determine his own variables and plug it into the equation.

As far as using the rollback to help try and lift that would be another set of equations

 

[MHarryE]

This is the voice of experience from the exact equipment...MHarryE, just wondering if you have ever had your hydraulic pressure tested? Mine, from the factory was about 400 lbs low...getting it adjusted to max spec made a very noticeable and usable difference.

Mine was checked and adjusted at the dealership before delivery. If I remember right I checked against the specs and the numbers came out right. My pallet forks are sturdy (meaning heavy) because they switch between tractors with varying load capacities so they do eat into the lift capability of the little L5740.

 

[FatTire]

So, the experience forever affected your tractor nom de plume, right, FatTire?:tractor:

ha ha, good one!

 

[TomSeller]

The front tire pressure is a big deal -- forgot about that once while picking up a 1835# roll of steel from a trailer, the sidewalls were crumpling to the point that I'm glad it (apparently) didn't damage the tires.

You almost would have had to change your name to FlatTire.

 

[texasjohn]

Took me a while to realize that the front tires/axle have to support the loaded FEL and, with insufficient rear weight, they become a pivot point and a huge amount of entire tractor weight is also transferred to them. A lot to ask of a couple of little tires

 

[C4Ranch]

Well did you get it lifted? Don't leave us hanging...