Hi everyone, Just picked up a used 455. Saw in pretty good shape and runs well, but not oiling at all. I removed the clutch, blew air though the oil tube connecting pump to bar, but still no oil. It seems that the worm gear is driving the pump okay, but perhaps it is worn. Any more suggestions. I drained the oil from the reservoir, and was hoping to grab the pick up and change the filter. But.....the filter seems to be WAY down at the base of the tank (makes sense) with a very short line to the tank. Not sure how I'd get that out and fit a new one. If I had to replace or blow out the tank to pump line - is this a bear of a job? Thanks for any advice. Cheers!