Tires Do You Run Your AG Tires Low or Pumped Up?

   / Do You Run Your AG Tires Low or Pumped Up? #1  

OkieG

Veteran Member
Joined
Jun 5, 2002
Messages
1,131
Location
Oklahoma City
Tractor
Deere 855 (24hp/19@PTO)
For their heavy Ag equipment, JD recommends running the (Ag) tires at relatively low pressure. Pictures show a fully inflated tire with straight sidewalls, and a properly inflated tire with bulging sidewalls.

Fully inflated is the wrong answer to the JD quiz, but seems to work best for me. With parial inflation the tires sag too much with a load, and I think it would be easier to loose air at the rim and go flat...which has happened to me once.

So, how do you do it? Do you run on the low side, high side, or recommended pressure stamped on the tire sidewall?

OkieG
 
   / Do You Run Your AG Tires Low or Pumped Up? #2  
Here's a great article on this subject put out by the CA. government. If you have bias ply tires, not radials, you should not run them underinflated. The article will tell you how to do it exactly. John
Correct/Low inflation
 
   / Do You Run Your AG Tires Low or Pumped Up? #3  
The larger tractors have a tendency to develop a power hop if you are pulling a very demanding implement. Properly ballasting the tractor as well as reducing air pressure will get rid of the power hop. For those who don't know what power hop is, it is like constantly popping the clutch but you have no control over it as it is just a ballast and inflation issue.
 
   / Do You Run Your AG Tires Low or Pumped Up? #4  
I'm running 12 psi on the inners and 8 in the outers.
 
   / Do You Run Your AG Tires Low or Pumped Up?
  • Thread Starter
#5  
Inners and outers?? I take it you're not talking about belly buttons. /forums/images/graemlins/shocked.gif

Inner tubes is as close as I'll ever get to "inners".

Seems like big tractor Ags and small tractor Ags are treated like different animals.

OkieG
 
   / Do You Run Your AG Tires Low or Pumped Up? #6  
That's why John Deere came out with the ILS sespensions in the 8000 series to reduce this. I guess it works fairly well but the new tractors we order in we never get it installed.
 
   / Do You Run Your AG Tires Low or Pumped Up? #7  
ILS is a costly option which is why a lot of farmers would rather adjust the ballast and tire pressure. Also, if something was to break up there it would not be cheap to fix.
 
   / Do You Run Your AG Tires Low or Pumped Up? #8  
Robert, power hop is the unequal ratio from front to rear axle and the hop is the unwinding of it. The tire pressures are normally adjusted to get rid of it. The changing ballast or load on the tractor tires is most often the cause do to the squat of the tire or it's change in height . The ballast right or wrong can be left in tact and just remedy the problem with air.
 
   / Do You Run Your AG Tires Low or Pumped Up? #9  
The neighbours have radials on their 2wd and run them low. Get much better traction than the old fully inflated bias ply and they can drive much faster without getting beatup.

We use the basically the same tractor only with 4wd, loader and bias ply tires and it is much rougher.
 
   / Do You Run Your AG Tires Low or Pumped Up? #10  
I thought the pic of my tractor's dual wheels was pretty apparent. Yep inners and outers, tires that is. /forums/images/graemlins/wink.gif
 

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