873G auxiliary hydraulics only work in one direction???

[brokenandunreadable]

Auxiliary switch works, 2 auxiliary coils work, stems function as they should, i also inspected to pressure relief valves on what i belive to be for the auxiliaries...they operated alright. if the skidloader sits or fluid is drained out of the lines on the block it will work about 5-10 times before the grapple bucket is stuck in the "up" position. When i engage the control to operate the grapple in the direction the grapple will work (stuck in "up" position the engine will bog) move control to operate down position and nothing happens...coils operate as they should, grapple is brand new, flushed system, loader works perfectly otherwise ....FML! Im very knowledgeable and great with directions but Im truly stumped??? Thanks in advance!

 

[Tazza]

I'd swap the stems around and see if the problem reverses, if so, your aux stem is sticky. I have pulled them apart and cleaned mine before.