When inspecting the pintle hook on a converter dolly before coupling, what should you verify?

The pintle hook is a critical safety component because it carries the dynamic forces of pulling and braking between the lead trailer and the dolly. Inspection items: the pintle hook latch must close fully and securely over the eye of the dolly's draw bar; the safety chains or cables must be intact, properly rated for the load weight, and connected through the hook so that a primary failure does not separate the dolly; the hook itself must be free of visible cracks, distortion, or excessive wear that could allow the eye to escape. A failed pintle hook drops the dolly and rear trailer onto the road. This is a serious incident.