7520 lift capacity

[MtnViewRanch]

Well, I'm going to go against most everybody else here and say that I think that it will do it. I am fairly sure that I have lifted that much weight before, but and this is a huge BUT, I was lifting junk and or not anything of any real value. When in doubt, it is better to be safe and use a crane or fork lift, especially when dealing with anything of value.

 

[QRTRHRS]

The trailer that your boiler is being delivered with, what happens if you cannot make the lift? If this was a situation where the boiler was on your own trailer, time or possible damage to the trailer would be less of an issue.

Other than that, I too would give it a shot. I would see if it would pick the weight and if it did, I would then lower it. If that worked then I would pick it and have the trailer pull away prior to lowering it down close to the ground.

By the way, are your forks rated enough for the weight?

 

[AchingBack]

What size is the pallet? Can you somehow duplicate the weight with 525 gallons of water on a pallet? If so, you would know before hand what to expect.

 

[LAWALLSTRACTOR]

I didn't know you were going to use forks, and with that in mind I doubt you will lift it that far out. Most ot those boilers have a lift loop that is located in a well balanced position, and if it will not hit the grille, I would drop the bucket and lift from there. Every bit of geometry advantage you can get, you will need. Good luck and be save.

 

[bindian]

Also extend the boom and dipperstick on your backhoe. Put your largest bucket on the BH and add weight in the BH bucket. Remove your loader bucket too. I think if you try to lift it and can just get it "lite" on the trailer, let the truck driver pull out from under it. Are your tires filled? If you have R1 tires, I am sure they will go flat with this load. I have flattened my 6520 tires lots of times while moving large stumps and whole trees. Same lift cap. as your 7520. But if your rear gets too lite while trying to lift..............get a fork lift and save you some grief.
hugs, Brandi

 

[Blu 82]

I don't think it will lift it. I unloaded a pallet of metal roofing from a flatbed semi that was 21 ft long , about 4 ft wide, 8 inches high, and weighed about 3045 lbs. I could only lift it about 1-2 inches off the semi flatbed and no more. I used forklift attachment (I think they are rated for 5000 lbs). Once I got it off the truck, I could not raise it or curl the forks back and had to let the load slip off the forks when I lowered the forks. Nothing was damaged but it wasn't the best way to do it. It could have weighed more but you are trying to unload 4200 lbs and that is a huge difference. I put 28 lbs of air in the front tires (Ag) and had the backhoe slightly extended out on my 7520. I think the 70-75% rule works fairly well when trying to figure out whether you can lift something farther out then the pins. My example was fairly close to that.

I would see about having a forklift as a backup at the very least. See if there is someone near you that has one and will help out since the rental place is so far away. The delivery truck normally doesn't want to stick around because you don't have the right equip to unload and you may get charged if you hold him up--probably cheaper to have the forklift.

 

[SPYDERLK]

Also extend the boom and dipperstick on your backhoe. Put your largest bucket on the BH and add weight in the BH bucket. Remove your loader bucket too. I think if you try to lift it and can just get it "lite" on the trailer, let the truck driver pull out from under it. Are your tires filled? If you have R1 tires, I am sure they will go flat with this load. I have flattened my 6520 tires lots of times while moving large stumps and whole trees. Same lift cap. as your 7520. But if your rear gets too lite while trying to lift..............get a fork lift and save you some grief.
hugs, Brandi

Some very good suggestions here and thruout. Be extremely careful to test the situation gently because you are at a limit. Realize also what Brandi means about getting it "lite". That means either very lite or else very sure of the adequacy of your counterweight, as evidenced by the points touched on in her setup . Elsewise you run a very real danger of tipping forward when the truck pulls out. If you have R1 fronts it would be wise to overpressure them a bit. They are safe to 35psi when seating the bead and even more after the tire is correctly mounted. The R1fronts on the 7520 are larger than on the 6520 too, so support capacity will probably be fine at 35psi. Still, if the hydraulics wont lift and curl you will have to get creatve to set it down gracefully. I would favor increasing the loader relief pressure to around 3000 psi temporarily. This should give you enuf hydraulics to do it.
larry

 

[bindian]

Some very good suggestions here and thruout. Be extremely careful to test the situation gently because you are at a limit. Realize also what Brandi means about getting it "lite". That means either very lite or else very sure of the adequacy of your counterweight, as evidenced by the points touched on in her setup . Elsewise you run a very real danger of tipping forward when the truck pulls out. If you have R1 fronts it would be wise to overpressure them a bit. They are safe to 35psi when seating the bead and even more after the tire is correctly mounted. The R1fronts on the 7520 are larger than on the 6520 too, so support capacity will probably be fine at 35psi. Still, if the hydraulics wont lift and curl you will have to get creatve to set it down gracefully. I would favor increasing the loader relief pressure to around 3000 psi temporarily. This should give you enuf hydraulics to do it.
larry

Also, it is **** near impossible to turn with this much weight. While dragging whole pine trees with the root ball end hanging by a chain and needing to turn at a specific spot, say over a gully culvert, I have to lower the bucket to releive all that weight on the front, then reposition when the rears are not getting good solid weight on the thread. Thus 4 wheel drive is essential here.
Also, curl won't be a factor because you will need to chain the load from the loader arm forward cross tube. I think forks will have to forward of a center of gravity issue and the bucket will be removed to save lift capacity. I have removed my 84 inch wide bucket before to lift a large stump this way when it wouldn't lift it using the welded hooks on the top of my bucket. Be careful and good luck!
hugs, Brandi

 

[jrchafin]

Sorry about the delayed update guys, I kinda forgot till now. Thanks for everybody's input.

Anyway, as I expected, the tractor would not lift the boiler. Not only that, but because of my work schedule, I had to use my backup plan (which was to have a local business unload it off the semi and then put it on my trailer) right off the bat. So I didn't even try to lift it off the semi, just off my trailer which is 2-3' high. Wouldn't budge it. The boiler does have a lift hook, but I think it's too big to try and lift from above at the pivot pins. Would be crushing the grill, so I didn't try that.

I've got a 14 ton boom truck scheduled to come next week. Think that'll lift it?

 

[bindian]

The boiler does have a lift hook, but I think it's too big to try and lift from above at the pivot pins. Would be crushing the grill, so I didn't try that.
it?

Jrlogan,
Then you need a Mahindra bumper and modifly it like I have mine.
hugs, Brandi