I haven't had many issues with the tractor... typical hydro lines going, etc. Being HSD, it all relies on it, so when you lose a fitting/hose/seal, it brings the whole thing down.
After much work and a new seal, I am thinking the vent was slightly plugged and the fluid was a little too full and with all the stress of the heavy/wet snow... it just caused the seal to pop out with the presure would be my guess.
Got it all cleaned up... we will see tomorrow/Wednesday how it all works when we get nailed with the snow again.
cb