This gas spring provides controlled lifting and damping force for the cab door or hatch on the host tractor. It is installed between the cab frame and the door panel, using its internal nitrogen charge and oil damping to hold the door open and prevent it from slamming shut. A gas spring that has lost its charge will no longer support the door, causing it to drop or close unexpectedly. As an original part from the tractor manufacturer, the spring's extended length and damping rate match the original assembly's geometry, so no bracket adjustment or shimming is needed during replacement.