Originally Posted by Pipeman
Ok I'm going to try to help. Look at the end of the pump. In the middle, on mine, is a hex key entry way. You might have some tape or paper over the hole. Break through the covering and get the right sized hex key. I had to cut a hex key so I could use it with a cordless drill. Make sure that the hydraulic taps are in the open position. I have one for each slide on my 5er. That is, turn them all the way to the left if they aren't that way already. Insert the hex key and use the drill to bring the slides in. Now I have never done it myself so you'll have to experiment to find out which way to run the drill to bring them in, unless someone chimes in to tell you. Hopefully what I told you is what you have on your trailer. Good luck.
That procedure is only used if the pump is not running. Their pump is running, so it won't help.