I was surprised and dismayed to lean the wire-spoke rear wheel from my SP project to the right and have the drive-side wheel bearing fall out on the floor. Finding a major issue right off the bat with a project is mildly discouraging.
I've learned that the steel inner hub is a replacement part for the cast wheels (#14632250), but not for the wire wheels, though it appears the later part can be modified to fit.
I'm not sure retrofitting the later part makes much sense if it would also eventually loosen up on the bearing. Buying a piece of 4140 or 4340 steel and making a new hub might give me a superior part to OEM if Guzzi didn't use a very high-spec steel. Since the brake-side bearing is carried in a separate aluminum casting the steel hub only needs the one bearing bore done before the completed replacement hub is parted off of the bar, which helps to simplify the process.
Has anyone pressed the steel hub out of the wire wheel alloy hub, and if so was it pretty straight forward? The wheel is currently built up and has a new tire/tube installed on the new Akront rim, so popping it all into the oven to loosen the fit between the steel and aluminum doesn't seem a good idea. I'm thinking that instead I might aim my heat gun on full blast at the alloy hub and maybe have it also sitting on an electric hot plate/range element until it gets around 100C before putting it in the press. For assembly the steel hub could be cooled to help reduce the interference fit into a hot wheel casting.
thanks,
Michael
I've learned that the steel inner hub is a replacement part for the cast wheels (#14632250), but not for the wire wheels, though it appears the later part can be modified to fit.
I'm not sure retrofitting the later part makes much sense if it would also eventually loosen up on the bearing. Buying a piece of 4140 or 4340 steel and making a new hub might give me a superior part to OEM if Guzzi didn't use a very high-spec steel. Since the brake-side bearing is carried in a separate aluminum casting the steel hub only needs the one bearing bore done before the completed replacement hub is parted off of the bar, which helps to simplify the process.
Has anyone pressed the steel hub out of the wire wheel alloy hub, and if so was it pretty straight forward? The wheel is currently built up and has a new tire/tube installed on the new Akront rim, so popping it all into the oven to loosen the fit between the steel and aluminum doesn't seem a good idea. I'm thinking that instead I might aim my heat gun on full blast at the alloy hub and maybe have it also sitting on an electric hot plate/range element until it gets around 100C before putting it in the press. For assembly the steel hub could be cooled to help reduce the interference fit into a hot wheel casting.
thanks,
Michael