Big Fish is right. They've changed it again. But... I'll be honest with you. Checking it every 50 hours is a little overkill. If you don't see any signs of leakage on the outside then I don't see the point. I would check it with every oil change. I don't like the idea of taking that cover off that often and exposing the gears and bearings to the risk of contamination if you don't have to.
Serving Greenville, Winterville and Ayden NC