Fixing up an old ebike hub motor with water damage, shot bearings, and a broken hall sensor

This video goes over the process of overhauling a customer's ~10 year old generic 9 Continent hub motor that has suffered from exposure. These direct drive motors are quite resilient, so even with water and rust inside, broken hall leads, and partly disintegrated ball bearings, it was still actually in running condition. But it sure didn't sound very healthy and inspire confidence, and we decided to document the repair process for others.
0:00 - Intro
1:49 - Opening the side plates to see inside
3:05 - Bearing removal
4:14 - Scrubbing stator clean
6:30 - Cleaning the rotor
7:26 - How water gets in
10:53 - Vent hole option
11:27 - Ball bearing insertion
12:00 - Testing and replacing hall sensors
15:25 - Reassembly
Old direct drive motors like this can be found in discard piles and scrap metal yards on a regular basis, and with a little mechanical effort most of them can brought back into fine running condition again as we've shown here.