The pinch screw, set screw on extruder gear set was found loose over time and cause gear grinding. In fact, this is number one killer for this extruder design so far. One guess is that the pinch screw was never tighten since they assembled. The unit on video total running hours is less 30, so...I was lucky enough to discover that. But many others have ended up with completely bad gear.
This was found on day 1 after they released this extruder design. Many months later, I don't know why they still have not fixed it. Operator error on the shop floor? Maybe, but there should be a way to eliminate human error on this one. It is just so hard to not get it done right.
Many people may disagree that you should not put threadlock on this tiny pinch screw. CUZ you will never be able to remove it again. But, there are cases that it got loosen again over time after people tighten it. Since the spur screw it located at encounter fast speed rotation and vibration. But you decide whether to put threadlock or not.

There are many disassembly and parts involved, I thought it would be helpful if there is a video could help beginners.

If you think this video is helpful, please let me know in the comments. Or, you think there is something that I didn’t cover, please let me and others know.
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Intro: 0:00
required tools: 0:23
Disassembly: 1:32
Re-assembly: 5:47
Function Test: 11:42

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