D7E 48A 2472 Cable/Tilt

My starting engine ran fine when I bought, loaded and unloaded it so no complaints there. But the oil is filthy, I couldn't get socket to connect with the drain plug so I dropped the belly pan. The hydrophilic hoses for tilt run right in front of the plug and are rusted stiff. I unbolted a hose mount and got enough play to get the socket on the plug and it turn about 5 turns before it get tight again. No oil comes out, I have put a drill bit into the hole to unplug any barrier and feel no indication of any hole. I plan to suck the oil out but would rather the drain plug work. There is (I believe) a heat exchanger I could drop to get more room but would rather not. Does anyone have an idea to move me forward? Yes I read the operation and service manual I found in the document portion (isn't this a neat addition to the site? Thanks, Lex