How Does This Freewheel Come OFF?

[1FJEF]

So this may be an ignorant simpleton type question, but how do I get this off? The two small depressions can't be it, that's gotta be access to the innards. Is it two chainwhips, one on a rear cog and another on a front one and turn the front one counter clockwise? Is it voodoo, chicken bones, lizard tail and a crows foot?
7 speed freewheel, Suntour Japan. It's on an old Bianchi Eros (Japan). Everything seems to be Suntour Radius stuff, the shifters are on the downtube, front is micro-ratcheting friction type, rear is indexed, marked Radius Accushift Plus.
7 speed, 13 tooth to 23 tooth.



A little closer:

[DaveM]

I think it's got to be a cassette. Two chain whips, remove by unscrewing the smallest cog. But it does look a bit different than the 6 spd suntour cassettes I've seen.

[nfmisso]

Haven't a clue; but some of these may lead to an answer:
http://www.sheldonbrown.com/suntour.html
http://www.yellowjersey.org/stfw.html

[1FJEF]

(07-08-2011, 03:39 PM)nfmisso Wrote:  Haven't a clue; but some of these may lead to an answer:
http://www.sheldonbrown.com/suntour.html
http://www.yellowjersey.org/stfw.html

If you don't have a clue, I'm in trouble.

[trevgbb]

is it possible that this is a faulty component and should have had a spline machined into it, but had missed that op at the production stage?

You can remove it by dismantling it and slogging it off with a hammer and chisel, but this will probably damage it beyond use.

[1FJEF]

I called Park Tool Technical Assistance & the guy seemed confident that it is removed with two chainring tools. Loosen & remove the front cogs & the rear cogs come off together in the manner of a psuedo cassette.

[1FJEF]

The hub's left side is normal with 1/4" bearings in a standard cone & cup. The drive side uses a reversed set up, with the cup on the axle & the cone on the hub and twelve 3/16" bearings!
The drive side looks like this (with the skewer removed for clarity)


Then with the normal cup & cone removed on the left side the axle is pulled out & the hub with the cone on it revealed

The axle with the drive side cup (please excuse the fine dust)



The funky cup with the twelve 3/16" balls


Just for scale here's 3/16" and 1/4" balls

Use 2 chainwhips (this is shown tightening)

---

When the front cog is loosened

Removed for clarity

Which leaves the "freehub"


And the pseudo cassette

With the locking cog reversed


Wierd, huh?

[nfmisso]

Suntour cassette !!

Since my last post, I have been learning about them also, as our tandem has one too.