Hi Bob, got an update. Brought the dozer home and with the help of my son, we removed the seat, floor plate and bevel gear cover. Gained access to the piston and pushed it back in. The lift arms on the three point were pretty stuck in position so we soaked them with WD 40. That may of been part of my problem why they would not go down, even with a couple hundred pounds of down pressure. Anyway we got it back together. My question is where are these stops you mentioned previously? Thanks