Tires How to check pressure on loaded tires?

[SPYDERLK]

Remember they are only supposed to be filled to about 70%.
Andy

Ive filled mine to near 100%. No ill effects. Actually makes the handling quite solid at soft tire pressures when you have big rears with 95% fill at 6 - 10psi [unladen]. Rides well and limits left/rt roll to very close to that directly caused by rise and fall of the ground.

larry​

 

[Bird]

Ive filled mine to near 100%. No ill effects. Actually makes the handling quite solid at soft tire pressures when you have big rears with 95% fill at 6 - 10psi [unladen]. Rides well and limits left/rt roll to very close to that directly caused by rise and fall of the ground.

larry​

I'm sure we've all done things that are not recommended by the "experts" and in the majority of cases, get away with it with no ill effects. In your case, you are increasing the liklihood (or maybe I should just say the "possibility") of blowing a tire. And as long as you have the money to replace it, and it's riding and performing as you wish . . . hey, it's your tire; you should do whatever you want to do, but for my tires, no way I'd exceed 80% and more likely 70-75%.

 

[SPYDERLK]

I'm sure we've all done things that are not recommended by the "experts" and in the majority of cases, get away with it with no ill effects. In your case, you are increasing the liklihood (or maybe I should just say the "possibility") of blowing a tire. And as long as you have the money to replace it, and it's riding and performing as you wish . . . hey, it's your tire; you should do whatever you want to do, but for my tires, no way I'd exceed 80% and more likely 70-75%.

The give in the large tire carcasses effectively avoids the large pressure spikes that would fail a tire. As long as your motocross is slomo and you dont do unladen pressures above 15 I think its safe. Has been for me, even with damaged and booted tires. Im more concerned with the tractor frame in big bounces so Im careful there - as one should be even with empty tires cuz they might bounce you over on your side.

larry​

 

[Bird]

I can understand that, Larry. I've had some bounces that were enough to scare me a bit.

 

[Soundguy]

Considering the minimal weight gain from 70% to 90+%, and the fact that most tractors only have the air inthe rear tire for suspension.. AND that most manufacturers only reccomend filling to 3/4 level.. I don't see a real good need to bypass any of that. While a tubed tire may be more forgiving on the bead than a non tube tire.. I wouldn't want to test that ballast against that non-tube bead seal on a shock load..

Soundguy

 

[SPYDERLK]

Considering the minimal weight gain from 70% to 90+%, and the fact that most tractors only have the air inthe rear tire for suspension.. AND that most manufacturers only reccomend filling to 3/4 level.. I don't see a real good need to bypass any of that. While a tubed tire may be more forgiving on the bead than a non tube tire.. I wouldn't want to test that ballast against that non-tube bead seal on a shock load..
Soundguy

Its more for the solidity of the ride - its non bouncy locked to the ground nature that I fill them fuller. I find when filled fuller and the pressure lowered the full tire offers almost the same ride in terms of harshness as a lesser fill. The bounces just arent as springy. Major bumps will be worse tho, and you just allow for that in your driving by slowing at appropriate times.
I cant imagine a shock load debeading a near full tire any easier than a partial fill. Short of tire failure [there is a robust cable around the bead] the higher the pressure the better and more secure the seal. I find highly compressed tires and/or high side loads w/o adequate pressure to be the main threat at the bead seal. Near full tires never compress grossly, but as in any there is the risk of side load debeading. - Particularly since the hi fill can be run softer and still support hi load w/o excessive compression.

larry​

 

[hayden]

I took another shot at this today with only partial success. Even with the tire unweighted (using the backhoe stabilizers to take the weight off the tractor) and the value at the top of the arc, I'm still getting fluid out of the valve. When I pump air in, I can hear it bubbling, so it appears my tires are over filled a bit.

To top up the pressure, I tried a different approach and just set the regulator on my compressor down to 25-30 PSI, then filled the tires until the bubbling slowed way down. This isn't a very precise way to inflate them since I don't think the regulator and gauge are meant to be very accurate. Regardless, this took the worst of the bulge and bounce out of the tires.

 

[SPYDERLK]

I took another shot at this today with only partial success. Even with the tire unweighted (using the backhoe stabilizers to take the weight off the tractor) and the value at the top of the arc, I'm still getting fluid out of the valve. When I pump air in, I can hear it bubbling, so it appears my tires are over filled a bit.

To top up the pressure, I tried a different approach and just set the regulator on my compressor down to 25-30 PSI, then filled the tires until the bubbling slowed way down. This isn't a very precise way to inflate them since I don't think the regulator and gauge are meant to be very accurate. Regardless, this took the worst of the bulge and bounce out of the tires.

25psi is way too much pressure for ballasted rears. It would be unusual to find a rear implement load situation that would even require 20PSI.
larry

 

[RoyJackson]

I took another shot at this today with only partial success. Even with the tire unweighted (using the backhoe stabilizers to take the weight off the tractor) and the value at the top of the arc, I'm still getting fluid out of the valve. When I pump air in, I can hear it bubbling, so it appears my tires are over filled a bit.

To top up the pressure, I tried a different approach and just set the regulator on my compressor down to 25-30 PSI, then filled the tires until the bubbling slowed way down. This isn't a very precise way to inflate them since I don't think the regulator and gauge are meant to be very accurate. Regardless, this took the worst of the bulge and bounce out of the tires.

It does sound like like those tires are overfilled. Optimally, you could drain both rear tires, then refill them to ~75% (covering the rims completely).
If you think both tires are filled the same, you can drain a few gallons off yourself. Jack the tractor up (no more then an inch off the floor or ground). Put jackstands under the axles (depending on your backhoe stabilizors isn't a good idea). Rotate the wheel so the valve stem is at 12:00. Remove the valve core and slip a tight fitting length of hose over the stem. Use a hose clamp, if you want. Then rotate the wheel to about 2:00 or a little more. Use a one gallon container (Milk Jug). Since there isn't any vent, the flow will slow after a bit so you'll have to rotate back to 12:00 with the hose out of the container. It may help to blow a little in (with a compressor). Set your compressor regulator to about 20 PSI.
The question is how much to drain. When you rotate to 2:00 and geet no liquid, you'll be at about 75% or a little less. Instal the core, rotate the stem to 12:00 and inflate to the desired pressure.
Same procedure for the other tire. The Milk Jug is your gage to ensure you drain the same amount from each tire. Also remember, gases (air) compress, liquids do not.

Obviously, dispose of the liquid in an environmentally safe manner.

 

[Soundguy]

For agg applications like I use my tractor for.. namely mowing.. I don't varry my speed... to do so means I am lowering my throttle ( changing rpm ).. or clutching to change gear or range... none of which i like to do while mowing... And bouncing around in a cow pasture deffinately wants the 'air' int he tires. If I use dthe tractor for more / slower tilalge.. it may be different.

As for a full tire debeading or having other problems.. I've seen it happen plenty of times in industrial settings... I've seen large nearly fully loaded 1000+$ tires blow out or de-bead from shock loads on loaders and other heavy equipment... I havn't priced the rears on my 5000 or 7610s.. but I bet they cost a pretty penny.. much more than I want to risk just to get a few # extra... Side wall stiffness? Mines fine using proper air pressure for what i do... ( mowing )..

Soundguy

Its more for the solidity of the ride - its non bouncy locked to the ground nature that I fill them fuller. I find when filled fuller and the pressure lowered the full tire offers almost the same ride in terms of harshness as a lesser fill. The bounces just arent as springy. Major bumps will be worse tho, and you just allow for that in your driving by slowing at appropriate times.
I cant imagine a shock load debeading a near full tire any easier than a partial fill. Short of tire failure [there is a robust cable around the bead] the higher the pressure the better and more secure the seal. I find highly compressed tires and/or high side loads w/o adequate pressure to be the main threat at the bead seal. Near full tires never compress grossly, but as in any there is the risk of side load debeading. - Particularly since the hi fill can be run softer and still support hi load w/o excessive compression.

larry​