A thread about draining the chaincase reminded me of this: On my first Bobcat (12 machines ago) I didn't change the chaincase oil very often because it was such a pain to do--suck it out somehow, wipe up what wont come out. The oil ended up milky from water contamination, so I had to change it. I drilled a small hole right at the bottom of the chaincase in the front, which of course allowed the oil to drain (jack up the rear and only a few ounces at most don't drain out). I then tapped out the hole for a pipe plug. I have done this to every machine since, and always change the oil annually now--easy to do and I think good insurance. Since all the oil does is lube the chains and brgs, I just keep my eyes open for a deal on cheap offbread motor oil and usually find it pretty cheap when someone has a big sale. CHEAP INSURANCE, and no crud/milk/sludge if changed annually.