Installing Shimano 7610 Track BB
- From: "mickster" <google@xxxxxxxxxxx>
- Date: 17 Nov 2005 09:54:54 -0800
I'm about to install a new Shimano 7610 Track bottom bracket - this is
the BB for the older generation square taper D-Ace track cranks. The BB
is English sized going into an English BB shell.
Having installed the drive side cup and BB unit and torqued it to 50Nm,
I'm having a problem with the left side cup - it screws in ok most of
the way but then stops approx 1-2mm short of its full insertion, ie
when tightened there's a 1-2mm gap between the left edge of the BB
shell and the l-hand cup. It's not a question of further tightening
because the axle starts to bind if tightened any further.
The left hand cup does come with a rubber o-ring which suggests that
this gap might be intentional and needs to be covered with the o-ring,
but this seems like a strange design if that's the case. Removing the
BB and comparing its overall width to the BB shell, it does seem that
the BB-plus-cups is 1-2mm wider than the BB shell.
The BB is definitely English (cups are English threaded and BB body has
NJS logo).
Is this normal for this BB or am I missing something? If it is normal,
how hard do I need to torque the l-hand cup to ensure it's a tight
enough fit?
Many thanks,
Mickster
.
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