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07-15-06, 10:01 PM
I just got a killer bargain from craigslist: a shimano 4 speed nexus with roller brake (? brake actuated with a cable) in a 700c wheel, a grip shifter, and a chain tensioner.
The only problem being the hub doesn't work. I see it as a great opportunity to dig in and see how it's made. The axle does not spin, or requires lots of force to spin. If I grip the cog and try to spin it from there (also requires a bit of force), I think I can feel the freewheel ratcheting because it follows a pattern of spin half circle, click, spin, click, spin...
My more knowledgeable bike buddy made a guess that _something_ might be too tight. We'd like to loosen off and peer in from the drive side. Instead of an axle nut, there's something that resembles a mini-cassestte (slightly larger in diameter than a nut, and has splines). What kind of tool can grip this?
Are there any service manuals for the nexus hubs? Can anyone speak from personal experience? Any online links? Guesses?
I figure $30 was worth the fun in trying to figure it out.
The only problem being the hub doesn't work. I see it as a great opportunity to dig in and see how it's made. The axle does not spin, or requires lots of force to spin. If I grip the cog and try to spin it from there (also requires a bit of force), I think I can feel the freewheel ratcheting because it follows a pattern of spin half circle, click, spin, click, spin...
My more knowledgeable bike buddy made a guess that _something_ might be too tight. We'd like to loosen off and peer in from the drive side. Instead of an axle nut, there's something that resembles a mini-cassestte (slightly larger in diameter than a nut, and has splines). What kind of tool can grip this?
Are there any service manuals for the nexus hubs? Can anyone speak from personal experience? Any online links? Guesses?
I figure $30 was worth the fun in trying to figure it out.