Check on your oil filter bracket there may be an adjusting nut. Mine was way too high after warmup. I adjusted it down into a more reasonable range. Although checking with a manual guage to check would also be a good to check your tractor guage
Could not do without the hyd. top link since I got it. Maybe the best single thing I added. Here is a Dalton one i installed without the check valve. I run mine from one set of my rear remotes with control from the valve. The valve must hold well as I have no drifting what so ever. I have simple but good control with the rear remote valve. Heres a video link , but not sure if the link will work