This video explains the main functions and practical uses of the Komatsu WA320 hinge pin (part numbers 419-46-41190 and 419-46-11330) in a clear, step-by-step format. You'll see how this critical component serves as a heavy-duty pivot point, withstands high loads and shock, and ensures smooth, stable movement in your wheel loader's front end. We'll also walk through the complete parts catalog and compatible models to help you understand the full assembly context.