This isn't directed at Ozarker per se...but asked in general as something I've wondered about this topic...
I'll give MY idea of how I might try to remove as much fluid as possible outta loader/backhoe lines. It involves more than zero danger, but like all of life, both eyes open & be careful...
What if you fully raised loader or backhoe, turn machine off. Then drain your system. Disconnect the NON load bearing hose off the cylinders. After that is off, go to controls & move such that you then drop the airborn item to ground, pushing the oil out of one side and filling OTHER side with air. When it drifts to ground, you've removed as much fluid as you possibly can, short of disassembling the cylinder.
Change filters, refill, cycle through several times to fill all the nooks & crannies & go dig some holes.
Now...I've never DONE the above, it just strikes me as a way to remove as much fluid as you possibly could and I've always been curious that, other than the obvious danger of removing hoses with buckets in the air /forums/images/graemlins/crazy.gif is it otherwise "feesible"
I think you could probably do it leaving the hoses ON, but your tank would have to be empty so that you sucked up air instead of residual oil.
OK... that's my thoughts... hit me with the errors of my thinking.