bretster wrote: ↑
Jan 31, 2018 11:52 am
I have the dreaded growling gear noise on a 500w 36v BBS02 with about 3000km on it. I ripped it apart and all the gears are fine. It appears the motor shaft is the problem as it measured 7.9mm, but on the GEAR side, not the motor side. The motor side also feels a little loose, despite measuring 8.0mm (just using calipers...not very accurate). Has anyone had this problem on the gear side and used Loctite to fix it? I am thinking I might need to loctite both ends, which would mean possibly never being able to open it up again. Any ideas that don't involve loctite on both ends?
Thanks for any information you might provide!
That is precisely what happened to me after my first overhaul at 1500kms. The next year, it started to make that noise when the motor was heating up. With the motor cool, it was utterly silent. After a moderate to strong effort, the noise started again. I only made 500 kms so far that year so it wasn't normal.
Note that it's a BBS02B
so it's completely different that the BBS02.
In the BBS02B, the bearing on the motor side is already loctited to the rotor at factory otherwise tolerances has changed and the fit is extremely tight. So I never tried to separate them. If it ain't broke, don't fix it. I did applied yellow loctite though between the outer side of the bearing and its casing.
See photo where the bearing is stuck to the rotor: https://www.ts-export.com/_mb/bbs02_31d ... GP0378.JPG
For a good measure, I applied yellow loctite as well on the both sides of the gear side bearing effectively locking everything into place.
I applied a small amount of loctite, so with some prying force or heat from a torch, the motor could be reopened.
It's deadly silent since and I made 2200 more kms afterwards.
Hope that helps.
Sorry for the delay in replying, I thought that thread was dead.