Didn't get any bites on that question, so took a brief look at a D950 parts list which indicates that you don't have the standard dipstick arrangement. So the tube and dipstick is probably a special, maybe borrowed from a different series Kubota. The D950 (anyone, correct me if I'm wrong) has the dipstick hole nearer the front of the engine. Relocating it 1/2 way back makes some sense for a tilted engine. That oil level would have to come down a loooong way to expose the oil pickup (which according to the diagram I saw is towards the rear anyway) so that shouldn't be a problem. I reckon think about Wolfman's question about oil quantity, and depending on that, consider operating the engine with a lower oil level and keep an eye on the oil temperature as well oil pressure.
Don't know if the yellow line correctly shows the standard oil level (below the line of the counterweights), but operating for an extended period with a 7 deg. tilt might causes rear counterweights to whip up oil. Just my 2c.
