I've had my bike since new in 1993. I rebuild the hub bearings every so many years. I recently rebuilt the rear after letting it go for too many years and had a nagging question:
(Reference the linked image. Shimano Acera X 7spd hub.)
See the boot seal on the non-drive side of the rear? Is that supposed to be fixed to the axle spacer and rotate against the hub body?...Or is it supposed to be fixed to the hub body and rotate against the axle spacer?
The reason I ask is that it has been doing the former (rotating against the hub body) for the past 20 years or so and it's showing some undesirable wear (and the part is probably NLA). And I could swear that when I first bought the bike that seal stayed fixed to the hub and it was the end by the axle spacer that rotated.
Anyone know which is correct?