DA rear hub question

Basjan said:

I overhauled my Dura Ace rear hub this weekend (DA-7700) and found

"weird"

Quoted message said:

slots in the drive side race (I think that is what the

bearing-carrying part

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of the hub is called). There were basically four rectangular slots

in the

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race, just off-line from the curved bearing surface of the hub

itself. What

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are these for? They seemed dangerously close to the bearings and

also might

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introduce wet/dirt?

I am unclear what you are talking about. Here is a diagram of a shimano
rear hub that is similar to the one you have:

http://www.sheldonbrown.com/images/k7hub.gif

Here are some instructions on overhauling:

http://www.parktool.com/repair_help/howfix_hub.shtml

The "drive side" (right side) race is in the freehub body. Are these
"slots" in the freehub body?

"Basjan" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

I overhauled my Dura Ace rear hub this weekend (DA-7700) and found "weird"
slots in the drive side race (I think that is what the bearing-carrying
part of the hub is called). There were basically four rectangular slots in
the race, just off-line from the curved bearing surface of the hub itself.
What are these for? They seemed dangerously close to the bearings and also
might introduce wet/dirt?

The RH bearing cup acts also as cone for the outer freewheel (casette body)
bearing. To disassemble the freewheel mechanism / bearing the RH cup must be
removed with a special tool that fits into these four slots. The freewheel
bearing is adjusted with shims, btw, and contains appr. 70 1/8" steel balls,
afair.

Wbr,
Anders

basjan-<< I overhauled my Dura Ace rear hub this weekend (DA-7700) and found
"weird"
slots in the drive side race (I think that is what the bearing-carrying part
of the hub is called). There were basically four rectangular slots in the
race, just off-line from the curved bearing surface of the hub itself. What
are these for? They seemed dangerously close to the bearings and also might
introduce wet/dirt?

I say-they are the slots in which to put the tool to take the freehub apart. If
you would ever want to do such a thing. A specific tool, by shimano and that
'cap' is left threaded. Cap off, freehub body off, lots of teeny 1/8 bearing
balls everywhere.

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<BR><BR>

Peter Chisholm
Vecchio's Bicicletteria
1833 Pearl St.
Boulder, CO, 80302
(303)440-3535
http://www.vecchios.com
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