I took advantage of this cold weather and pulled my round baler into the shop.
The baler had a hydrualic leak somewhere in a area where 6 hydraulic lines pass through a tube going from one side of the baler to the other.
The leak was small but persistent and I was unable to determine which function it was related to.
I had to block and test each line individually to determine the damaged line.
Of coarse it turned out to be the last line to be tested that was damaged.