I have a similar tractor/fel/setup. I do crawl up my extended FEL to replace the batteries on my trail cams. I have found that the problem is that since the tractor is off, the FEL shifts downward (loses it's pressure) over time. So there is an about 1" shift of the FEL every 15 minutes or thereabouts. It's unsettling. I have assumed that this is a release to not keep the pressure on the gaskets, etc for an extended period when not in use. If I leave the FEL up off the ground and come back the next day, it is resting on the ground.