Before you take it apart, try to adjust the lock nut and rod on it to see if someone had just loosened it so it doesnt slow the hatch down. Its adjustable and you just need to loosen the nut on the one side and get a wrench or pair of channel locks to fit on the slotted end of the piston and just see if it will tighten up and thread further into the hull side mount. If so chances are that is exactly whats wrong and you can just adjust the tension yourself, if not you are probably gonna need to open it up and see what the deal is. If you find anything out let me know im curious to see what the deal is