3 Point load?

[Dave Wave]

Is 800lbs too much weight for a Cat 1 hitch on a 30 HP tractor (Iseki TS3110)?


Thanks,


-Dave

 

[George2615]

I don't think so. I used an 800 lb. ballast barrel on my 26HP. but my tractor 3 Pt. cat 1 is rated for about a 2200 lb. lift. If you have the owners manual it should give you a hint of what to use as rear ballast.

 

[grsthegreat]

not sure what kind of tractor you have, but the book from my old JD870 (28 HP) lists the 3 point hitch capacity at 1880 # @ 24" behing the lift link.

 

[RoyJackson]

Is 800lbs too much weight for a Cat 1 hitch on a 30 HP tractor (Iseki TS3110)?

Thanks,

-Dave

I doubt 800 lbs is too much weight for your 3PH, but don't you have an operator's manual for the tractor? If so, the weight capacity should be in there (probably the specifications section).

 

[RobertBrown]

I doubt 800 lbs is too much weight for your 3PH, but don't you have an operator's manual for the tractor? If so, the weight capacity should be in there (probably the specifications section).

What he said...

 

[nspec]

Here's what I don't get: My tractor lists the maximum lifting force at the lift points of over 2100 lbs. At 2 feet behind the lift point, the lifting force is almost 1700 lbs. Now here's where they lose me: There is a section in the book called "implement limitations" where they list the maximum weight of various implements which can be put on the lower links. They are all like 500-550 lbs. What's up with that? Why can my implement only weigh 1/4 of the lifting capacity? Am I missing something?

I can tell you that my tiller is 700 lbs. and there is no problem with that. I know it's heavy, but the tractor doesn't flinch and handles it just fine. I've always wondered this, so perhaps this discussion can shed some light on it for me.

 

[JB4310]

Here's what I don't get: My tractor lists the maximum lifting force at the lift points of over 2100 lbs. At 2 feet behind the lift point, the lifting force is almost 1700 lbs. Now here's where they lose me: There is a section in the book called "implement limitations" where they list the maximum weight of various implements which can be put on the lower links. They are all like 500-550 lbs. What's up with that? Why can my implement only weigh 1/4 of the lifting capacity? Am I missing something?

I can tell you that my tiller is 700 lbs. and there is no problem with that. I know it's heavy, but the tractor doesn't flinch and handles it just fine. I've always wondered this, so perhaps this discussion can shed some light on it for me.

Just physics, most implements are going to stick out more than 2 feet. your tiller not as far as say a brush hog. The farther an implement sticks out the rear, the greater the leverage and weight put on the lift. So the capacity/rating would be lower.

Wish I could make a more coherent English statement. :ashamed:

JB

 

[kennyd]

Here's what I don't get: My tractor lists the maximum lifting force at the lift points of over 2100 lbs. At 2 feet behind the lift point, the lifting force is almost 1700 lbs. Now here's where they lose me: There is a section in the book called "implement limitations" where they list the maximum weight of various implements which can be put on the lower links. They are all like 500-550 lbs. What's up with that? Why can my implement only weigh 1/4 of the lifting capacity? Am I missing something?

I can tell you that my tiller is 700 lbs. and there is no problem with that. I know it's heavy, but the tractor doesn't flinch and handles it just fine. I've always wondered this, so perhaps this discussion can shed some light on it for me.

It's because things like rotary cutters are so long, they are way out past the 24" lift capacity spec vs. your tiller which is probably at about the 24" lift spec. The further past the 24" mark the capacity decreases rapidly.

 

[SPYDERLK]

Here's what I don't get: My tractor lists the maximum lifting force at the lift points of over 2100 lbs. At 2 feet behind the lift point, the lifting force is almost 1700 lbs. Now here's where they lose me: There is a section in the book called "implement limitations" where they list the maximum weight of various implements which can be put on the lower links. They are all like 500-550 lbs. What's up with that? Why can my implement only weigh 1/4 of the lifting capacity? Am I missing something?

I can tell you that my tiller is 700 lbs. and there is no problem with that. I know it's heavy, but the tractor doesn't flinch and handles it just fine. I've always wondered this, so perhaps this discussion can shed some light on it for me.

Its bouncing forces. It will lift 17-1800, but hit a bump while lifted and the force goes waaa-y beyond that and it could break the internal rocker arm. If you go much above their 550 guideline just drive carefully when lifted and youll be fine.
larry

 

[nspec]

I completely understand the part about the force dropping the farther out you go, but at 24" past the lift points it says it has a 1700 lb lift capacity. The center of gravity of the tiller is probably about 24" and knowing that most tillers sit much closer than say a disc or rotary mower, it still says max weight for a tiller is 550 lbs. - same as for the much longer implements. Seems a bit on the conservative side if you ask me - I'm sure it's a case of CYA. The bouncing force is something that I'm well aware of, and is why I take it real easy with that heavy tiller - it's my heaviest implement, and the only thing that'll make the sidewalls give a little. The backhoe may be heavier, but on the subframe I don't really give it too much worry.

 

[JB4310]

I think what Spyder says makes alot of sense, it's the difference between a static load and a dynamic/live/shock load. Even though at 4 feet out it could lift a static load of probably 1,000 pounds, you don't want to be bouncing around with that.

JB

 

[nspec]

Makes sense to me - thanks guys!

 

[yomax4]

As far as Iseki goes, I have a 30hp TA 247 with a 3pt rating of 1550# with Ag tires and 1880# with R4. I use mine as a log skidder and lift and drag some very large Oak logs. No prob so far.:thumbsup:

 

[RoyJackson]

Just physics, most implements are going to stick out more than 2 feet. your tiller not as far as say a brush hog. The farther an implement sticks out the rear, the greater the leverage and weight put on the lift. So the capacity/rating would be lower.

Wish I could make a more coherent English statement. :ashamed:

JB

Actually, that was pretty good for a guy from Connecticut.

 

[beenthere]

As far as Iseki goes, I have a 30hp TA 247 with a 3pt rating of 1550# with Ag tires and 1880# with R4. I use mine as a log skidder and lift and drag some very large Oak logs. No prob so far.:thumbsup:

Hope it stays that way. Let us know when you have found the "limit". :thumbsup:

 

[Baby Grand]

Actually, that was pretty good for a guy from Connecticut.

Hee-hee - that's funny!
We do talk a different language here - and we talk it fast, too!

Back to the OP's question - when I was getting my tractor I was limited on the size of Rotary Cutter I could handle by the max front suitcase weight available. That was before I added the FEL. So then the suitcase weights got scrubbed and the "useable" weight capacity on the 3pt hitch went up a lot with the FEL - which may also explain some of the difference. The weight they tell you is allowable doesn't assume you have a FEL mounted.

BTW - this was all based on my dealer's judgement. When I later did a moment diagram with fairly accurate distances between mass centers and axles, as well as weight transfer due to wheel torque I discovered that the dealer's judgement was pretty darn good.

-Jim

 

[SPYDERLK]

Hee-hee - that's funny!
We do talk a different language here - and we talk it fast, too!

Back to the OP's question - when I was getting my tractor I was limited on the size of Rotary Cutter I could handle by the max front suitcase weight available. That was before I added the FEL. So then the suitcase weights got scrubbed and the "useable" weight capacity on the 3pt hitch went up a lot with the FEL - which may also explain some of the difference. The weight they tell you is allowable doesn't assume you have a FEL mounted.

BTW - this was all based on my dealer's judgement. When I later did a moment diagram with fairly accurate distances between mass centers and axles, as well as weight transfer due to wheel torque I discovered that the dealer's judgement was pretty darn good.

-Jim

Soon after you hit a bump with a heavy implement raised, and it falls to the ground, you will become painfully aware of the real issue.
larry

 

[JB4310]

Actually, that was pretty good for a guy from Connecticut.

:thumbsup:

Hee-hee - that's funny!
We do talk a different language here - and we talk it fast, too!

-Jim

I didn't think we had an accent here, like NY or Boston.

Though one time I was fooling around with a CB radio when on a family vacation on the highway. All the truckers, who sounded to me to be from down South were joking about me amongst themselves, saying I sounded like a lawyer. I thought it was a compliment, I don't think they meant it that way :laughing:

JB.

 

[Baby Grand]

Soon after you hit a bump with a heavy implement raised, and it falls to the ground, you will become painfully aware of the real issue.
larry

If it's not correctly ballasted, oh yes!

 

[SPYDERLK]

Ballasting wont keep from breaking the 3ph internals -- and would normally make it more likely because the tractor front would not lift to moderate the impulse.
larry