This gas spring provides the lifting force to hold the sunroof panel open on the host tractor. It is an original AGCO component, machined to match the mounting geometry and gas-charge pressure of the factory assembly. A failing gas spring will allow the sunroof to drop or fail to stay fully open, which can interfere with operator egress and ventilation. On replacement, ensure the spring is oriented with the piston rod facing downward to maintain proper damping.