I have a case 580L. Rear tires are 19.5-24 12 ply. I’m wondering how much air pressure others run in their tires. The manual says 28 psi.
I run 20 psi in my NH. My manual said 32 and I started with that until I punchered one on a small stump stub. Haven't had any problems with 20 psi. I run 25 psi in the fronts.
Mine are 19.5-24 12 ply also. I have 28 psi. in them. Under inflation will change the footprint and cause excessive flexing of the sidewalls.
Mine are 19.5-24 12 ply because I use to rd. a lot I kept them at 35 to 40 # I do a lot of work in the bush and on sharp rocks never had a problem front are 14 ply 45# when 12 ply still ran 45# in front.
Come to think of it mine are only 6 ply I think. 12 ply and above are considered forestry tires and a lot more expensive.
I've run 54 front 28 rear in every backhoe and skip loader I've ever been responsible for.