3-Point Hitch Overloading three point hitch can it break it?

[tractordog]

Hi,

I have a new holland 1520 that is rated to lift under a ton. I am having pellets delivered, I thought I would give it a try to lift the pallets.Could I break the three point hitch doing this using a three point forks attachment ?

Thanks for you comments

 

[George2615]

Your 3 pt has a limit. If what you are trying to lift is too heavy the pressure relief will open and not let it lift to avoid damage to the 3 pt. The same goes for a loader, if equipped, if the load is too heavy the relief will open and it won't lift.

 

[mikeman1]

I am no expert and there are plenty of guys on here much smarter than me on these types of questions but I wouldn't think it would be a problem as I think there is a relief valve on the hydraulics if the load you are lifting is too heavy it just won't lift it. If it does lift the load I wouldn't be bouncing across the land with it as it might snap one of the lift arms, at least i would drive gently with it. just my 2 cents. like your member photo.

 

[tractordog]

Thanks for your replys

Only planing to move the pallets twenty or so feet over to garage. I think I am only a few hundred pounds under the ton. May remove a few bags to see were the limit is

 

[oldafretired]

I just had a heavy wood chipper delivered. With the chipper, crate/pallet, and 3 point pallet fork, I was at the weight limit of my three point. At first it wouldn't lift it after pulling the lever and then after several seconds, the 3 point got the load up. I didn't damage anything though.

 

[mike69440]

+Overladed, it should go into relief before it breaks, but hit a big bump at speed, something will give.

 

[/pine]

+Overladed, it should go into relief before it breaks, but hit a big bump at speed, something will give.

Nice "scoop job" on the bucket load of rocks....wish I could do that...

 

[SPYDERLK]

Yes. But not in the way you plan to use it. As said, the pressure relief will protect the system when lifting. The situation that can break something arises when you lift a heavy load, say 60%+ of the limit, and then carry it too briskly over a bumpy surface. The pressure relief does not work in that case [when holding] and pressure wont relieve. Internal parts on the rocker shaft can be catastrophically overloaded. ... A real bad feeling when the load crashes to the ground.

 

[CCWKen]

Keep in mind that most of the specs on 3pts are at the lift links, not at the end of the lift arms. Actual capacity will be less. Lots of tractors will lift above capacity but rough terrain usually breaks parts. I've seen cases of twisted rocker shafts, broken links and lift arms posted on this forum.

 

[coobie]

Hi,

I have a new holland 1520 that is rated to lift under a ton. I am having pellets delivered, I thought I would give it a try to lift the pallets.Could I break the three point hitch doing this using a three point forks attachment ?

Thanks for you comments

I burn about 5 tons of wood pellets per year.I can tell you get some weight on your front end to pick up 1 ton of pellets.

 

[Fallon]

Keep in mind that most of the specs on 3pts are at the lift links, not at the end of the lift arms. Actual capacity will be less. Lots of tractors will lift above capacity but rough terrain usually breaks parts. I've seen cases of twisted rocker shafts, broken links and lift arms posted on this forum.

The ISO standard for rating 3pt lift capacity is 24" to the rear of the hitch...

ISO 789-2:1993 - Agricultural tractors -- Test procedures -- Part 2: Rear three-point linkage lifting capacity

Loaders are usually measured at the pins & suffer more in the real world.

Hydraulics are intentionally the weak link in most lift limits as the relief valves are designed to trip before damage. That or adequate front ballast in the case of 3pts.

 

[SPYDERLK]

On the subject of protection against catastrophic overload, there are usually 2 in the hyd circuit to the lift cylinder. One is the relief valve. It controls how much lift force can be applied. It is in the circuit only during lift; and not while a lifted item is being held. ... The second safety is a small external rupture element, always there sampling right off the cyl, that will burst when pressure in the lift cyl reaches a [much higher] level that endangers mechanical parts. -- This is a situation that may occur with a heavy load over bumps. -- Unfortunately manufacturing tolerances and/or accumulated mechanical damage may result in this safety being too close to the catastrophic limit and the mechanics fail first.

Thats when its ugly.​

 

[Pipanski]

Interesting point about the difference between the hydraulics not lifting something off the ground vs being able to be over loaded and busting once it's already the air. I was moving some bricks over the weekend (the picture is the 3rd trip) and I had my bucket in the air while loading to save me from bending over as much. I'm not sure how heavy this was, but I did adjust the bucket a little bit right before I started moving, so I'm thinking that if I was over loaded it wouldn't have raised it an higher? Either way, I drove very slowly to the other side of the yard because there were a few bad bumps to go over.

 

[LD1]

IF you have multiple options for hooking the toplink to the tractor, use the upper-most hole and you will have the greatest lift capacity there. So if you attempt it and it dont lift, check where your toplink is located on the tractor side. It may lift your pallets in the upper hole, but fail to in one of the lower holes since it seems you are right on the edge or a little over your capacity.

 

[JerryK]

Most tractors I have owned, the 3pt or FEL is stronger than the hydraulics. Meaning if you try to lift something heavier than it can lift it just won't move [ front of tractor has to be weighted to keep it on the ground when lifting with 3pt, rear weighted when lifting with FEL to keep it on the ground, etc.. ]. You can sometimes bounce the load to get it off the ground, but that is not advised. Puts loads on it that it was not designed for.

 

[NoTrespassing]

Hi,

I have a new holland 1520 that is rated to lift under a ton. I am having pellets delivered, I thought I would give it a try to lift the pallets.Could I break the three point hitch doing this using a three point forks attachment ?

Thanks for you comments

I believe I broke mine by overloading a core aerator years ago.

http://www.tractorbynet.com/forums/...4-3-point-problem.html?highlight=#post1417306

Kevin

 

[SPYDERLK]

I believe I broke mine by overloading a core aerator years ago.

http://www.tractorbynet.com/forums/...4-3-point-problem.html?highlight=#post1417306

Kevin

Hmm ... yours broke the piston. Mine broke the rocker arm driven by the piston via the ball ended rod. Same effect but my lift arms were not jammed in the down position.