Kubota BX 2370

[John Gelm]

I assume most owners of the Kubota BX series know that it is like riding a wild bronco. The manual says front tire pressure 17 psi, rear 14. I called my dealer and all they said do not lower pressure as you will damage tires etc.etc. This is not my first rodeo and not to run on "improperly inflated tires." I have turf tires with a 60-inch deck, no front loader, and nothing on little 3 pt. Thinking about running 8 psi front and maybe 9 or 10 in the rear.
Any better suggestions out there? Oh yes, I did remove the rubber plugs that are inside the seat springs that seem to limit spring travel
HELP!
Regards,
John G
Hope this is correct place to ask first question

 

[JD3520Turbo]

Inflation is based on speed and load. Since you have no loader on this tractor, seems like you should be able to let some air out of the fronts and help you out.
If you have the 18x8.50-10 on the front in a 4 ply, it can hold 827lbs/tire at 22psi at 9mph. At 17, it should be able to hold around 639lbs/tire. I am not familiar with this model, but is there any way the front axle of that tractor could weigh 1280lbs? If the answer is no, then you have to much air in them.

If you have a 26x12-12 rear tire, in a 4 ply, it can carry 1764lbs/tire at 20psi at 9mph. At 14psi, you should be able to carry 1234lbs/tire.
This is using 9mph as the speed for this load table. I am not sure how fast this tractor goes, but if you road it a lot at well over that speed, then, load capacity goes down for a given PSI. Basically, the faster you go, the more pressure you need to carry the same load.

I looked up on tractor data and it said that your tractor weight is 1410lbs total.
That would be dry weight with no ROPS, or mower deck or fluids in it. Still, it appears that it is nowhere close to the weight that the tires will carry at the prescribed PSI.

It looks to me like you could drop both front a rear air pressures to help your ride quality. How much you can drop them will be determined by what your machine actually weighs by axle, and the speed you intend to go most of the time. If you determine your axle weight, we should be able to dial it in from there.

One thing to keep in mind is that you can't go to low, or the tires might pop off the bead when turning or on a severe side slope.

I think I would probably try 10PSI in the fronts and 10 in the rear and see how that works.

Let us know.