Tire pressure?

I'm not getting any responses in the JD forum so I'll ask here. I don't have an owners manual for general questions. What tire pressure is recommended for front (6-12) and rear (9.5-16) tires with the loader on? They're ag tires. Is it the the same with the loader off? If they don't have specific recommendations I'll take opinions :)

If anyone knows where I can find a pdf of the owners manual for the 755 or the 70 loader or the belly mower either--I'd like to download a copy. I have the technical manual pdf.
 
With the loader I'd run the 6-12 fronts as high as they can take; those are little tires and will probably be overloaded occasionally. 4-ply rated can have up to 28 psi but if only 2-ply then stop at 14 psi. For the 9.5-16's 4-ply tires can go to 20 psi while 6-ply can take 30. But, if you don't plan on heavy hitch-mounted implements I'd start out at 15 psi or so. If you see excessive bulging with your heaviest implement mounted then bump them up a bit. (Load and inflation facts are from the Firestone Ag tire catalog.)
 

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