CAT 631 Apron Lift Frame Repair 🍌 | Bore Welding & Precision Boring

This big Caterpillar 631 scraper apron lift frame is in the workshop with a pin bore so worn out the pin won’t stay tight and it’s our job to bring it back to spec! The setup begins on the Zayer milling machine, where we’ll find centre and machine out the damaged bore using a shop-made extension with a boring head. With the bore machined it’s time to set up the Sir Meccanica WS2 for bore welding. We’ll be using ER70S-6 and add a layer of weld to build the bore back up. Once it cools down the Zayer will go back to work boring it to size, facing it clean, and cutting in a chamfer for the new pin. The final test will be fitting the pin and it needs to be spot on. This is why we love the heavy gear – big machines, big repairs and the satisfaction of seeing it all come together! 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: https://bit.ly/ceesubscribe Want Early Access & Ad Free videos?? Join our Patreon Community: https://www.patreon.com/cuttingedgeengineering Official CEE Merch shop: https://www.ceeshop.com.au Check out our CEE Amazon store and explore our favourite finds that we use in the workshop: https://www.amazon.com/shop/cuttingedgeengineeringaustralia To see more follow us on online here: TikTok: https://vt.tiktok.com/ZSdHhtN4h/ Instagram https://instagram.com/cutting_edge_engineering Facebook https://www.facebook.com/cuttingedgeengineeringaustralia/ About Us: We're a down-to-earth real life machining and fabrication workshop in Australia. We specialise in helping business in mining and earthmoving to keep their machines running smoothly. We love working on broken parts and the bigger the better! We upload new videos every week showcasing machining, welding, line boring, honing and all the other awesome stuff that goes down in our workshop. Learn how we tackle different projects and see the satisfaction of creating something useful. Subscribe to stay updated on our latest jobs and projects! Follow us on Patreon for even more content and behind-the-scenes glimpses or find us on Tiktok, Facebook and Instagram for a chance to connect with us. #australianmachinist #machineshop #machinist #borewelding #heavymachinery