I am looking for the valve for RS of hydraulic unit under seat from a 300 utility that is equipped for power steering. I am told this is the only way to get proper flow/pressure to power steering. I installed a power steering box, but cannot get pressure unless I connect to the auxiliary valve and open. This will cause hydraulics to overheat if I attempt to run this way. The proper valve is needed. Anybody happen to have one?? It looks like the regular valve block, but has ports for power steering. This tractor has become a headache. By the way, I have a very good std steering box available. Thanks, John