I've got the newer style Powr-Trol on my JD 50 that I have been restoring over the past few years. Started taking the Powr-Trol apart the other day to clean and check it and have come to a show stopper. There is a release valve that resides in the case, and according to the SM-2011 manual, this can be pulled out using a magnetic pick-up tool. Tried that.... it does not budge. The manual also says - "Air pressure can also be used to an advantage." How does this work? I dont see a way to get air under the valve to force it up. The valve is apparently all the way down in the hole, which is about 2.5 inches down the cylinder that it operates in. I have soaked the top of the valve with PB blaster and tapped gently on top of the valve to try and free it, but it still wont move. Anyone out there run into this problem? Your suggestions would be greatly appreciated!