/ snowball_engineering  

In this video I repair a Cat D4 clutch fork.
One of the main pivot bolts had badly worn threads and also the threaded insert in the fork itself was worn out/broken out.
A new bolt was machined in the lathe from EN8 40mm bright round bar. The first threading attempt didn’t go to plan but the second try came out good.
The newly threaded part was then taken out of the lathe and mounted in the indexing head on the milling machine, after a quick crash course teaching myself how to actually use the indexing head, the hex for the bolt head was cut.
Next, the threaded insert was made. Same process in the lathe except internal threading.
The Bolt then had a hole drilled through the head then was parted off in the lathe.
The hole in the fork where the insert goes was cleaned up and chamfered with the die grinder, the insert was then TIG welded back in. The insert on the opposite side was also loose, so that was knocked out and cleaned up and rewelded back in.
Hope you enjoyed the video.
Thanks for watching!