What tire pressure with loaded tires?

[daybreak1998]

Howdy,

Air pressure is subjective. The range between 12-16psi sounds about right.

Filled solution. = do not use straight water. You will want some type of rust preventative. Research the filling solutions. I see your in Texas, so you do not have the freezing conditions others also have to think about.

Look of tire = Large AG tires should sit with at least 3 lugs touching the ground. 18.4-38 radial tire at 14 psi and 75% methonal+water mix sit with three lugs touching. Since they are radial's, they also show some squat (bulging) on the sides.

Use a water capable air pressure qauge.

You can always lower the air pressure when you go to disc.

 

[JasG]

Thanks for the responses. The tires are tubeless and are what came on the tractor Goodyear Duratorque, I think. I'm gonna try it with 75% fill and see what I think. I can go down to 40%, but the extra weight is what I really wanted. Guess I could always do 40% and hang a box blade on the 3 point. When I start using a disc, the water / air pressure combo might be more critical.

I don't believe in filling ag tires if you don't have to. A good friend of mine bought a new tractor several years ago 95 PTO hp and had me explain to the dealer how we wanted it set up. The sales person and I were in agreement not to fill the tires. My friend being "old school" was very much against this and wanted them filled. The agreement was if he wasn't happy they would get filled for a very small charge later. After running it side by side with his other tractor that had filled tires he was sold. The tractor rides a better and pulles much better. We left the other tractor filled because he felt safer having the exrta weight when the loader was on the tractor. Really see a difference in tillage, it seems to pull much better with less bounce be it plowing or disking.

 

[Tx Jim]

After running it side by side with his other tractor that had filled tires he was sold. The tractor rides a better and pulles much better. Really see a difference in tillage, it seems to pull much better with less bounce be it plowing or disking.

Are you implying that a tractor without filled tires will pull a plow better than a tractor with filled tires?

 

[art]

We are finding that to be the case with many of our tractors that we sell. One customer that had two nearly identical tractors said the one with the loaded tires road like an elephant vs a cat on attack mode without the loaded tires.

You can't compress water only the air and what normally happens is when you drive over a bump by the time the tire moves the fluid to absorb it you are normally past it so you actually lose traction. This also causes the tires to wear faster cutting the tires life in half for what we have seen over the last twenty years.

There are applications where the weight is a must for proper ballasting but we are trying to not use the fluid if at all possible when setting up tractors today.

 

[JasG]

Are you implying that a tractor without filled tires will pull a plow better than a tractor with filled tires?

Not implying, I've done it with a tractor that weighed less over all (slightly less). Had the same set of plows and went back and forth between the 2 right after my friend bought the tractor. The tractor with the filled tires spun a lot more than the tractor without. The tractor without filled, the tires would squat more and spin less. You could see a difference between the marks left by the tires. Both tractors had tires that were new at the time.

This is why many OEM's, deere, firestone, etc don't recommend filling or if they need to only fill 40%. It also has an effect on "power hop", seems tractors with filled tires and higher Hp tend to have issues with that.

If the tractors are weighted equally I see no advantage to filled tires, but do see advantage to unfilled.

 

[JasG]

We are finding that to be the case with many of our tractors that we sell. One customer that had two nearly identical tractors said the one with the loaded tires road like an elephant vs a cat on attack mode without the loaded tires.

You can't compress water only the air and what normally happens is when you drive over a bump by the time the tire moves the fluid to absorb it you are normally past it so you actually lose traction. This also causes the tires to wear faster cutting the tires life in half for what we have seen over the last twenty years.

There are applications where the weight is a must for proper ballasting but we are trying to not use the fluid if at all possible when setting up tractors today.

This has been what we have seen also. The tractor we have with the filled tires has less hours on it since my friend bought the "new" one. Yet the tires are whipped. The "new" one has between 3500 and 4000 hours on it and the tires look much better. We don't do much roading, our furthest field is less than 1/2 mile by road. The older one hasn't done much tillage since we bought the "new" tractor 8 years ago.

 

[Tx Jim]

Not implying, I've done it with a tractor that weighed less over all (slightly less). Had the same set of plows and went back and forth between the 2 right after my friend bought the tractor. The tractor with the filled tires spun a lot more than the tractor without. The tractor without filled, the tires would squat more and spin less. You could see a difference between the marks left by the tires. Both tractors had tires that were new at the time.

This is why many OEM's, deere, firestone, etc don't recommend filling or if they need to only fill 40%. It also has an effect on "power hop", seems tractors with filled tires and higher Hp tend to have issues with that.

If the tractors are weighted equally I see no advantage to filled tires, but do see advantage to unfilled.

Granted I'm from the old school. I filled many new tractor tires with fluid way back in the 60's-80's when I worked at a JD dealership. It takes weight to make traction. These where 2WD rowcrop units not utility tractors. I'd have to witness a tractor without fluid out performing one with fluid to believe it. Were these identical tractors in comparison 2WD or MFWD??? I agree that fluid can make tractor ride more rough. Thanks,Jim

 

[zene55]

I have a dumb question. I understand how to fill the tires but not sure how you can fill them to say 40%. Are you rotating the valve stem at the height you want to fill the tires to?

 

[k0ua]

I have a dumb question. I understand how to fill the tires but not sure how you can fill them to say 40%. Are you rotating the valve stem at the height you want to fill the tires to?

consult the tire charts which are predicated on a 75% fill and get the number of gallons, then do the math for a 40% fill, and count the gallons, stop when you are at 40%

James K0UA

 

[JasG]

I have a dumb question. I understand how to fill the tires but not sure how you can fill them to say 40%. Are you rotating the valve stem at the height you want to fill the tires to?

Yes you can do either the valve stem or as also posted go by the number of gallons.

Here is a link to Deeres sales manual that states to put valve stem at about 4:00 and fill to that point.

Ballast, using liquid ballast in tires