Early Freehub Help? Can't Remove Freehub Body!
08-12-14, 02:36 AM
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Early Freehub Help? Can't Remove Freehub Body!
I have a couple early Shimano freehubs that are supposed to have slip-on ratcheting bodies. That means NO HOLLOW BOLT, they slip on over a tube-shaped extension of the hub. This was BEFORE Shimano added bolts.
Or at least they're supposed to slip off. Fully disassembled and looking at the aluminum center, I'm still not able to slip these off.
Any advice?
Or at least they're supposed to slip off. Fully disassembled and looking at the aluminum center, I'm still not able to slip these off.
Any advice?
Last edited by Crashman; 08-12-14 at 02:40 AM.
08-12-14, 06:41 AM
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You sure there's no hollow bolt? Sometimes it's not obvious there's even flats for a [8 or 10mm] hex key in there.
Try putting a hex key in, see if you get some purchase.
Try putting a hex key in, see if you get some purchase.
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08-12-14, 07:05 AM
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You would do a lot better posting pictures.
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08-12-14, 07:26 AM
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It's the same as when disassembling (not removing!) a modern Shimano freehub. Remove axle, dust shield and balls. Then remove the cup for the wheel bearing. It's counter-clockwise thread. There IS a special tool for the job, but I've always only used a suitably wide/thick file to engage the notches in the bearing cup.
It'll leave the core of the f/h body (with the pawls) still attached to the hub.
It'll leave the core of the f/h body (with the pawls) still attached to the hub.
08-12-14, 07:50 AM
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I had one of the true early 6-speed freehubs and the body did indeed slip off once the axle and bearings were removed. If yours doesn't, perhaps it's not as "early" as you think and does indeed have the hollow bolt.
08-12-14, 10:01 AM
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If I remember right, the first generation (this was long ago, so forgive my error if there is one) didn't have a spline drive to the hub shell. They had a course screw thread about 3/4" long which extended into the shell. Don't be shocked if you can't get it off.
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08-12-14, 10:04 AM
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From what I've read (since I haven't had one in my hands), it's a press-fit and might not come off easily if it's never been removed: https://www.bikeforums.net/bicycle-me...ficulties.html
08-12-14, 10:07 AM
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I have a couple early Shimano freehubs that are supposed to have slip-on ratcheting bodies. That means NO HOLLOW BOLT, they slip on over a tube-shaped extension of the hub. This was BEFORE Shimano added bolts.
Or at least they're supposed to slip off. Fully disassembled and looking at the aluminum center, I'm still not able to slip these off.
Any advice?
Or at least they're supposed to slip off. Fully disassembled and looking at the aluminum center, I'm still not able to slip these off.
Any advice?
Shimano Cassettes & Freehubs
Check out the section on "Early Uniglide". On these 5 and 6 speed units, there is no hollow fixing bolt. Shimano made a tool to remove these. Maybe one in 20 shops has one of these tools, and fewer would know how to use it.
I removed mine using a freewheel (thread-on) body, a large threaded bolt, and some nuts and washers. Screw the freewheel body onto the freehub. Pull the freehub body off by applying compression with the bolt & nuts.
Next question is what is your plan in removing this, since newer Shimano freehubs don't exactly slide onto your hub. I have press-fit a 9-speed Dura-Ace 7700 freehub body onto one of these once, but be prepared to do a bunch of grinding and axle/cone/spacer work. There is no shop that I am aware of that would have the patience and courage to attempt any of this.
08-12-14, 02:06 PM
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LOL, this is one of those situations where the people who know don't need pictures and the pictures I could take wouldn't help the people who don't know. Here's someone else's, shown already-disassembled.
From what I've read (since I haven't had one in my hands), it's a press-fit and might not come off easily if it's never been removed: https://www.bikeforums.net/bicycle-me...ficulties.html
Shimano made a tool to remove these. Maybe one in 20 shops has one of these tools, and fewer would know how to use it.
I removed mine using a freewheel (thread-on) body, a large threaded bolt, and some nuts and washers. Screw the freewheel body onto the freehub. Pull the freehub body off by applying compression with the bolt & nuts.
Next question is what is your plan in removing this.
I removed mine using a freewheel (thread-on) body, a large threaded bolt, and some nuts and washers. Screw the freewheel body onto the freehub. Pull the freehub body off by applying compression with the bolt & nuts.
Next question is what is your plan in removing this.
Oh, and you're going to love this: One of the GOOD bodies is a 5-speed. FIVE. The other is single-speed. BMX! lol
08-12-14, 03:06 PM
#11
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The top cup on the freehub is reverse threaded. When disassembling, prepare yourself for a shower of teeny balls. With experience, a complete freehub overhaul is a 30 minute job, done faster with the freehub still on firm on the hub shell.
