Correct tire pressure

Rapidrob

Member
I just replaced the front tires on my 4020LP. 6 Ply Bias,7.50x18's The rear are 18.4x34 bias ply.
I've looked around for correct tire pressures and there are so many onions as to what is correct I'm not sure what pressures to use.
My tractor has two additional weights on front and the rear tires have one weight. The tire are air filled only.
The tractor is used with a drag blade for road maintenance, drag a bush hog and a post hole digger.
Right now I have 25PSI in the front tires and 20 PSI in the rear. Would these pressures be correct for my use?
Also, How do you do a search on this site. It is not obvious to me?

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I would put 32-35 psi in the front tires and 18-20 psi in the rears. So, just up the fronts a little and you're good.
 
fronts can be 30-35 depending on load, but for that tractor 30 is lots. pretty high in the rears though... 12-14 psi is lots if not pulling equipment, as in your case. 20 is too much. tire pressure depends on what you are doing with tractor. i have 8 psi in my 660 ih with 1/3 fluid, and its my main field tractor.
 
Yet another opinion, agree with 30 or so lbs. up front rears should be down near 12lbs. with 18.4's again depending on usage. My pulling tractor Model 70 for example running 7500lb class with 600lbs hanging off the back run 10 psi in 15.5's. That pressure gives me the best bite on all the tracks. I say experiment if pulling power is top priority.
 

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