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air pressure in tires

bumblebee

bumblebee

Well-known Member
I own a John Deere 2320 which is a lawn tractor on steroids. It has military type tread tires and the manual says 30 pounds air in the rear tires. It is 4 wheel drive and I can understand 35 pounds in the front tires cause of the loader. I use it mostly for mowing what used to be pasture land which is rough.

The problem is it rides very rough and the seat has no suspension. The tires are tubeless. Is there any reason why I shouldn't lower the tire pressure to around 15 pounds. I don't know what they paid the engineer who designed the seat, but it was too much.
 
Those tires are on the smallish size right?? The smaller the tire the rougher they will ride. As for making it ride a bit better I would try around 25PSI and see if that helps. Getting the pressure down to far and you may have trouble keeping them aired up and also maybe have the bead pop off
 
Several people modify the seats on the 2 series tractors with a more suspension style seat from the new 1 series. It's not cheap but those who have done it say it's worth it.
 
no reason you can't do that, just because it's recommended air pressure don't mean it fits your job
 
Sounds awful high to me

I run them on the soft soft side for my kubota Bx2200 defiantly less than 20

With a top speed of 12 mph you only need them hard enough to keep the bead on

If you lift something like a rototiller with the 3 point. Or loader on front you'll need a little more air

I look at how the tire sits and add or reduce the air pressure for a good ride , traction and handling
 
no reason not to ... do it... go with 10 lbs if that works. i pull at tractor pulls with 6-8 lbs. air pressure in 660 international with 18.4x34 tires and no problems.
 

Just because a tire has 1500lbs at 35psi does not mean the tire is supposed to be inflated to 35psi.
Probably less than 500lbs of load per tire . The Firestone web site lists tire sizes, plies , load and psi . A rough guess would be 8-15psi.
 
Yes, the number on the tire is the MAXIMUM air pressure, not Federal law.

Ideally a tire should be aired up based on weight, but since most of us don't have fancy high-capacity scales to weigh our vehicles, we typically just air them up to the maximum pressure, and wear out the middle of the tread.

I would also recommend you drop to 15-20PSI and see if it helps.
 
I value my back more than my tires and as a result I have the softest seat I can find (and I have a pile of attempts in the corner that didn't fill the bill) and run the tires as soft as the application will allow. On my lawn mowers I run in the 5-10# area and I run 8" rims on 20-23" diameter rear tires for max balloon for max shock absorption. You'd be amazed at the difference in ride comfort when you trash the 12" wheeled, stiff sidewall tires that are OEM on most mowers for a soft sidewall, 8" wheel. Tractor fronts 20-25# as I usually turn without brake assist and need some sidewall stability, rears usually 13-18 depending on whether I am moving hay or not...on that if I use the FEL for moving large round bales, the pressures go up just enough to satisfy the requirement.

A problem on new tractors or new rims with new tires is tire slip under traction with light pressures. On one tractor I have had to increase the amount until the tire would quit slipping on the rim. Belt dressing between the tire bead and wheel helped a lot but still needed a bit more air.
 
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