I just bought this hub motor on eBay, and discovered the windings are covered in gunk (see pics).
This looks to me to be some severe water damage. Is this hub worth the work to salvage it?
Any tips on how to clean the gunk without causing further damage to the windings?
The hall sensors and/or their wiring appear to be non-functional (after rudimentary testing with 5vdc and DVM), but also, curiously, it looks like these sensors are in a different form factor than what has been documented in other 4xx series (SS40A): the red and black power/ground to each sensor disappears to the underside and only the signal wires appear to the topside.
I am hoping other Crystalyte 408 brethren could help with advice.