Tire pressure with loaded tires

bmack95hd · May 30, 2018

Going over the new to me John Deere 5203. Only has 638 hours by going over all the maintenance to my liking. Dealer I bought it from said the rears were not loaded. Well they are as I found out checking tire pressure. Haven't determined how much fluid is loaded, which appears to be old antifreeze by color and taste test. With valve stem on the high side of half way is setting tire pressure accurate? 16.9" x 28" say 18lbs., neighbor says being loaded 14-16lbs. at most. Any advise??

grizz02 · May 30, 2018

watch a goodyear rep about ag tires he did not care as much about pressure as how many bars where on the ground he wanted 3 bars on the ground in his test more pressure led to more slippage and the side by side test with 2 tractors pulling the same plows there was considerable difference in one pull I think they pulled about 1000ft and there was 40 ft difference and if you did that all day it was a lot of fuel lost to slippage

old · May 30, 2018

Since the tires say 18lbs that is what I would run them at. I'll bet there radial tires and if so yep run them as the tire says to run them

jeffcat · May 30, 2018

Just a little tip. Always but the valve stem at the very top. Take the air hose and give it just a little puff of air. THEN read your tire pressure. If your tires have that calcium stuff in them it will destroy you pressure gauge! Trashed a brand new VDO gauge from Germany years ago.

ed12345 · May 30, 2018

Tire pressure varies with the load and field conditions. The pressure on the tire is to support it at a given weight load generally at the max. You want the pressure as low as possible to keep the tire on rim for max traction. Slightly higher if you run it a lot on the road or hard ground

On the plow tractor with a big rollover plow we'd run close to 18 with loaded tires. But that was a lot of weight on the rear tires and they squatted down when the plow was lifted

With out the plow mid to lower teens. I could tell by how the tire sat and impression it left.

Your JD is a light tractor compaired to a big plow tractor so low teens is probable ok . Tires have a load rating and a loading chart. So one tire might need 16 and a higher load range tire (number of ply is also an indicator) on the same tractor beaver might only need 14.

For my little kubota I run 12.

If your uncomfortable trying to figure it out just talk to your dealor

The

jddrawbar · May 30, 2018

I agree with your neighbor.....I run 14-15 lbs. (same size tractor)

Adirondack case guy · May 30, 2018

Well, it depends on the application. On a general usage tractor you are OK.
If you are going to use the tractor with heavy 3pt. tillage equipment, and dependent on the hydraulic draft sensing system to maintain traction and provide depth control for the tillage implement, you need to run about 19-21 psi. to keep the tires from squatting as the draft control system does it's job. You also need to properly weight the front of the tractor to keep it solidly on the ground.
Back in the day, 4-6 bottom plows were very popular. We ran 21 psi. in furrow wheel, and 19 psi in land wheel for max performance with bias tires. I'm sure the rules have changes with radial tires, and there are not many 3pt primary tillage tools being used anymore.
Loren

rusty6 · May 30, 2018

I can't remember when I've last checked air pressure in a chloride filled tractor tire. Its not worth ruining a good pressure guage. I just eyeball it and if the tire does not bulge too much I call it good and go to work. Seems to work for me. The original Goodyear dyna torque radials on my magnum 7130 are pushing 8000 hours and 26 years of field work.

rustred · May 30, 2018

always check air pres. with valve stem at the top. as said , give it a shot of air first to clear out the calcium. you can run anywhere from 8 lbs. to 16 lbs. depending on the pulling and looking at the footprint on ground. you do not need over 16 lbs of air period.

Texasmark1 · May 31, 2018

On fill level, wait till the weather turns cold and you have a cool night and a warmer, humid day following......the condensation will tell you the fluid level.

Tire pressure with loaded tires

bmack95hd

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grizz02

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old

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jeffcat

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ed12345

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jddrawbar

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Adirondack case guy

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rusty6

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rustred

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Texasmark1

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