This gas spring controls the opening and closing motion of the cab sunroof panel. It provides a controlled lifting force to hold the sunroof in the open position and dampens the closing action to prevent slamming. The spring is mounted between the sunroof frame and the cab roof structure, with its rod end and cylinder end each secured by a pivot pin through the specified mounting holes. Over time, a loss of internal gas pressure reduces the lifting force, causing the sunroof to sag or fail to stay open. This replacement unit from Stabilus matches the original charge pressure and stroke length so the sunroof moves through its full range without binding. When installing, ensure the rod is oriented to extend in the correct direction and that the pivot pins are fully seated and retained.