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Old 07-06-10, 05:42 AM   #1
JugglerDave
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Sturmey XRF-8[W] CLUNK - lost gears 1,2,3,5 - Argh!

So on my morning commute I was pushing off a stop and "CLUNK" - I lost all drive in gears 1,2,3 and 5 (pedals and hub spin freely). Gears 4,6,7,8 seem intact.

Looking at the exploded parts diagram and seeing that 4 of 8 gears are out, I can't really figure out what might have happened. A control pawl? One of the 3 internal gear assemblies?

Sad thing is, this was a warranty replacement hub from early February, so it failed after only 5 months and about 400 miles.

Anyone have any idea (before it gets opened) which part(s) would fail only those gears?
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Old 07-06-10, 06:34 AM   #2
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Bummer. Not that this helps you in any way, my XRF-8(w) now has about 2500 miles on it. It went through a phase of not shifting well, but now it's working quite nicely.
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Old 07-06-10, 06:43 AM   #3
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Bummer. Not that this helps you in any way, my XRF-8(w) now has about 2500 miles on it. It went through a phase of not shifting well, but now it's working quite nicely.
Yes, the [w] series was supposed to be beefier and robust, so I was expecting it to last the lifetime of my Downtube 8H (or, approx 3 years).
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Old 07-06-10, 06:54 AM   #4
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Also, I found this. I have no idea how gear '1', direct drive, wouldn't be working. But gears 2,3,5 use "a" or "c" in combo.

1st gear: direct drive
2nd gear: stage C (130%)
3rd gear: stage A (148%)
4th gear: stage B (169%)
5th gear: stages A & C
6th gear: stages B & C
7th gear: stages A & B
8th gear: stages A & B & C, 325% overall
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Old 07-06-10, 08:40 AM   #5
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Originally Posted by JugglerDave View Post
Also, I found this. I have no idea how gear '1', direct drive, wouldn't be working. But gears 2,3,5 use "a" or "c" in combo.

1st gear: direct drive
2nd gear: stage C (130%)
3rd gear: stage A (148%)
4th gear: stage B (169%)
5th gear: stages A & C
6th gear: stages B & C
7th gear: stages A & B
8th gear: stages A & B & C, 325% overall
If something broke(which seems likely) then my first guess is that only one thing broke, unless one failure caused a cascade of secondary failures. So unless something broke in stage A and something else broke in stage C, then your problem should be in the mechanism that selects the gear assemblies, or connects them to the driver.

I'm glad you've posted this here; but I rather doubt we're going to give you what you need. The solution to your problems is contacting Sturmey Archer customer service, again, and let them give you what you need. Another new hub.
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Old 07-06-10, 11:45 AM   #6
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If something broke(which seems likely) then my first guess is that only one thing broke, unless one failure caused a cascade of secondary failures. So unless something broke in stage A and something else broke in stage C, then your problem should be in the mechanism that selects the gear assemblies, or connects them to the driver.

I'm glad you've posted this here; but I rather doubt we're going to give you what you need. The solution to your problems is contacting Sturmey Archer customer service, again, and let them give you what you need. Another new hub.

I contacted Sturmey Archer and I am very happy with their responsiveness and service -- they are sending out a replacement part directly to the bike shop and I will hopefully be up and running in a week or so.
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Old 07-06-10, 01:55 PM   #7
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On Sturmey's blog I asked about tear-down/rebuild instructions for the 8(W) series like Sturmey has published for 100+ years for their hubs and like Shimano and SRAM have for their hubs now.

The Sturmey guy said they weren't planing on offering any. What the heck, ya know?

There is an exploded view with a parts list for the drum brake version:
http://www.sturmey-archer.com/userfi.../XRD8-Tech.pdf

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