Repair Excavator Quick Hitch | Line boring & Welding

In this video we are line boring and bore welding to repair a Quick Hitch (quick coupling) off a Komatsu PC300 Excavator. The pin positions on the quick hitch have a failed repair by someone else and the weld layer is delaminating and breaking apart so we need to weld them up and bore them out to spec. We also need to repair the spacer plates that have a cracked weld. This shows the step by step process to repair the pin positions using our Sir Meccanica WS2 portable line boring machine. There is also some air arc gouging and welding to repair the cracked welds on the spacer plates. In this video we are using: - Sir Meccanica WS2 Portable line boring machine - WIA weldmatic 500i welder Join our channel: We upload new videos every Friday at 5pm AEST! If you want to see more of our videos click LIKE & SUBSCRIBE! You can subscribe to our channel here: To see more follow us on online here: Instagram Facebook