This front cab window assembly includes the glazing and the pre-installed seal. It replaces the original window in the cab body, forming the forward closure that protects the operator from weather and debris while maintaining visibility. The seal is bonded to the glass at the factory, matching the original profile so it seats correctly in the cab frame without additional adhesive or trimming. A cracked or delaminated window compromises structural rigidity and allows water ingress into the cab interior. On installation, clean the frame contact surface and press the assembly evenly into the opening until the seal is fully seated.