The bolts holes are stripped and damaged on this Caterpillar D9T Bulldozer transmission cover! Someone has also tried to repair one of the holes using a self tapping thread repair insert but the hole is in the wrong spot. This video shows the step by step process to repair the damaged bolt holes including drilling and tapping using the milling machine before installing new thread inserts. The inserts we are installing are Keysert key locking heavy duty thread inserts and are one of the best methods for thread repairs!

In this video we are using:
- Hafco TM-1740G Centre Lathe
- MetalMaster BM-63VE Milling Machine

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Our channel is all about showing you real life machining work from our workshop on the Gold Coast Australia. We specialize in manual machining, hydraulic repairs and heavy fabrication for the earth moving, mining and civil construction industries. So if you're a machinist that wants to see some big gear in action be sure to subscribe to our channel right now. We upload new videos every week that show lathe machining, milling, welding and all the good stuff that comes from a machining workshop. If that sounds like something that you would enjoy seeing, then make sure to join us by subscribing!

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