New to Yanmar tractors and need some assistance

[Helpin Out]

Final Chapter on the Yanmar tractor or at least for now. I drained the fluid and cleaned the filter then disassembled the fluid pump. There was a broken O ring and the nut was off the connector of the impeller shaft. Replaced the nut, (which was laying in the connector part) and the O-ring. Filled it with fresh fluid and it now works just fine! Turned out to be an easy fix. Thanks for the advice guys. Best, Dave