Pulling force of a BX23S

[Tractor Dell]

I was wondering if anyone knows what the pulling force of a BX23S (or similar tractor) is at the drawbar? With the FEL and BH on it, it is right about 2600 pounds in weight. I know it will depend on the type of terrain and things, as that will affect traction, but just a general idea. I have recently built a 5:1 pulley system and can increase it to a 15:1 in about 5 minutes. All I have to do is add 2 pulleys and a prusik knot. I was trying to make sure I don't overstress the parts of the pulley system.

If someone doesn't understand a 5:1 pulley system, in simple terms (not counting friction and things like that), if I pull the rope with 500 pounds of force, the object I am trying to move will have 2500 pounds of force. If my tractor can pull with 1000 pounds of force, it will put 5000 pounds of force on the object. At that point, I am probably at the limit of what my pulley system is designed for. Of course, I could break out my 10 ton pulleys, but they are heavy as heck! haha

I have looked all around the internet, but can't seem to find anything on this. Thanks!

 

[Code54]

Im not much help but I have pulled my 2500lbs trailer up a slight gravel covered incline and have moved a 1000lbs steel box by sliding it on concrete with our BX 25 and it didn't have any issues.

 

[bcp]

Remember that drawbar pull is not the same as how much weight it will pull when the weight is on wheels or skids.

Here is a good start:

From:
Tractor drawbar pull - AnandTech Forums

"From a review I was able to find, a Kubota BX23 tractor was able to pull 750LBs in 2WD, 1420 in 4WD, 1760 in 2WD w/ 600LBs of ballast, 1920 in 4WD with 600LBs of ballast, and it has an operating weight of 1520."


Bruce

 

[captronr]

Not sure what you are trying to pull, but a couple of comments. I have a BX2200, which is almost identical to yours, minus the BH. Mine has turf tires, and no added fluid or weights.

When pulling a 5 ft box blade with rippers, my BX will typically lose traction before the motor slows down. When that becomes an issue, I pick up a bucket full of dirt. That tremendously increases the pulling power of the BX.

Recently I needed to pull out some small trees next to a paved driveway. Rather than use the BX which might have been able to do it, I used the GMC 4x4. That worked easily.

Ron.

 

[4570Man]

I'd guess with a level chain the pulling force would be pretty close to the weight. If you had a sharp downward angle in the chain you could do a lot more.

 

[LD1]

Tires?

Typically a 4wd tractor, on level ground, with R1 tires will drawbar pull 90-100% of its weight.

So with your setup.....about 2500-2600# on dirt.

R4's would probably do equally as well on HARD dirt or pavement....but in loose or slightly soft stuff, they go downhill quick

 

[Jerry/MT]

I was wondering if anyone knows what the pulling force of a BX23S (or similar tractor) is at the drawbar? With the FEL and BH on it, it is right about 2600 pounds in weight. I know it will depend on the type of terrain and things, as that will affect traction, but just a general idea. I have recently built a 5:1 pulley system and can increase it to a 15:1 in about 5 minutes. All I have to do is add 2 pulleys and a prusik knot. I was trying to make sure I don't overstress the parts of the pulley system.

If someone doesn't understand a 5:1 pulley system, in simple terms (not counting friction and things like that), if I pull the rope with 500 pounds of force, the object I am trying to move will have 2500 pounds of force. If my tractor can pull with 1000 pounds of force, it will put 5000 pounds of force on the object. At that point, I am probably at the limit of what my pulley system is designed for. Of course, I could break out my 10 ton pulleys, but they are heavy as heck! haha

I have looked all around the internet, but can't seem to find anything on this. Thanks!

If you can find somedata like from the Nebraska Tractor Test Lab on drawbar power, you can calculate the drawbar force. It's simply Fd= HPdb/velocity, where Fd is the drawbar force and HPdb is the drawbar horsepower and Velocity is the velocity at which the drawbar horsepower was determined. As I recall that's in the Nebraska Test results.

 

[Tractor Dell]

Thanks all, for your input. I have R4 tires, and the last time I tried a 3:1 pulley system, the ground was a bit wet and I spun the wheels before I stump I was hooked onto even budged. I then got my 1 and 1/2 ton chain hoist and hooked it up to the stump and another tree and it came out without much issue. I was just surprised the tractor had that much issue. Guess the traction was more than an issue than the tractor itself. Thanks again

 

[Tomtint]

I had a BX22, it will pull just about anything you can put behind it. It will loose traction before anything else

 

[Grandad4]

Tires?

Typically a 4wd tractor, on level ground, with R1 tires will drawbar pull 90-100% of its weight.

So with your setup.....about 2500-2600# on dirt.

R4's would probably do equally as well on HARD dirt or pavement....but in loose or slightly soft stuff, they go downhill quick

That seems about right from what I've seen, too. So many variables though... ballast/no ballast, turf vs bar tires, type of surface, operator weight, etc, etc. If you have lugged tires (ags or industrials), you tractor will pull better going forward than backing up as any weight transfer will shift weight to the larger rear tires that have more traction than the fronts, and the tread pattern favors forward movement. Turfs have noticeably less grip vs bar tres, at least on my BX, altough they are reortedly better in snow.