After driving with no issues for a couple of months a MAC 12T (53621HR-CD) hub developed rather loud and seems random clicking noise:
Video1 (10s):
[youtube]wD8NTQ6dujg[/youtube]
Video2 (1m):
[youtube]wFajt3UVBHg[/youtube]
I've disassembled the hub partially and gears / bearings seem fine visually:
[attachment=2 width="100"]20190918_012720_HDR.jpg[/attachment]
[attachment=1 width="100"]20190918_012743_HDR.jpg[/attachment]
[attachment=0 width="100"]20190918_023405_HDR.jpg[/attachment]
Videos are post re-assembly with re-lubrication. It also does not seem to be freehub issue as the cassette is not engaged in the videos. There is no sound on low RPMs. It does not matter how much load is on the wheel - free-spinning or fully loaded - it makes same exact sound.
Reading around there seems to be three options: bearings are at their end of life, clutch is broken or the hub magnet(s) got detached.
This is my first build so don't have much experience in mechanical hub failures - has anyone seen (heard!) this failure before?
Video1 (10s):
[youtube]wD8NTQ6dujg[/youtube]
Video2 (1m):
[youtube]wFajt3UVBHg[/youtube]
I've disassembled the hub partially and gears / bearings seem fine visually:
[attachment=2 width="100"]20190918_012720_HDR.jpg[/attachment]
[attachment=1 width="100"]20190918_012743_HDR.jpg[/attachment]
[attachment=0 width="100"]20190918_023405_HDR.jpg[/attachment]
Videos are post re-assembly with re-lubrication. It also does not seem to be freehub issue as the cassette is not engaged in the videos. There is no sound on low RPMs. It does not matter how much load is on the wheel - free-spinning or fully loaded - it makes same exact sound.
Reading around there seems to be three options: bearings are at their end of life, clutch is broken or the hub magnet(s) got detached.
This is my first build so don't have much experience in mechanical hub failures - has anyone seen (heard!) this failure before?