In Reply to: Flanagan posted by Shannon on May 10, 2020 at 20:36:50:
I just had the same problem with my 9N. Immediately after shutting off the engine, the disc would drift down rather quickly. Someone else had the same problem and it was suggested that the pressure relief valve was at fault for the drop.
I purchased the replacement valve and installed it.
For me it was easier to drain the system, all three drains, pull the pto shaft and the left side access that contains the pto engagement lever.
When I was done, no more drift down. It hung there for an hour. Good enough for me.