Level Control troubleshooting...'80 300TD

[JimmyL]

I'm so defeated by this car so far! I just had to replace a 1/2 shaft and hub bearing and the A/C quit. I just can't catch a break, but at least it starts with 1/2 a turn of the key every time and doesn't smoke. Anyway, all whining aside....
I have got to get this level control working ('80 300TD). The back is sagging and bouncing. I guess first of all I need to verify that the pump is working. Do I just loosen a line somewhere to see if the fluid pumps out? (more than an ooze I would guess). One of the accumulaters is oil-soaked looking, and that is my main culprit at this time. How do I tell if it is bad?
I know an answer to this will take some typing effort, and up front I'm appreciative for said effort. I'm just trying to make this a daily driver work car, and I'm finding that my 'good deal' is costing me a good deal more.
Thanks,
Jimmy