Anyone know about the all steel Sweet Crank from the late 90's? Are the bottom bracket bearings replaceable?
Sweet Crank/ Sweet Parts
- Thread starter astbury531
- Start date
H
Henry Morgan
Guest
On Fri, 04 Jun 2004 07:00:43 GMT, astbury531
<[email protected]> wrote:
>Anyone know about the all steel Sweet Crank from the late
>90's? Are the bottom bracket bearings replaceable?
Yup. I still had one in use until a few weeks ago. Terrific
crank! Yes, the bearings are replacable and are standard
metric bearings, size 6804 and 6805. You will need one of
each. Be sure to specify 2 rubber seals. They are cheap. Buy
the best they have at the bearing shop (ANY bearing shop
will have them). To remove the bearings, you will need to be
careful. On the side with the bearing external to the BB
shell, you will simply be able to drift the bearing to the
outside by using a wooden dowel as a drift punch and
something for support (I used a shop towel and it worked
fine. On the other side, there is a spacer that will come
out first (drift the bearing toward the side without the
tool splines). Again I used a wadded up shop rag for
support, or you can bore out a block of wood with a hole the
size of the threaded part to act as a support for the
bearing shell. For God's sake, use green Loctite on the
spacer only when you have reinstalled the bearings. The
spacer is just a loose press fit and can come out if you
don't Loctite it in. You can also use it on the inner
bearing race to crank shaft interface. Let it set overnight,
but spin it freely every few hours to make sure it isn't
sitting cockeyed ever so slightly like it might if you are
showing significant shaft wear. This wear is compensated for
by the green Loctite in the shaft/bearing interface.
<[email protected]> wrote:
>Anyone know about the all steel Sweet Crank from the late
>90's? Are the bottom bracket bearings replaceable?
Yup. I still had one in use until a few weeks ago. Terrific
crank! Yes, the bearings are replacable and are standard
metric bearings, size 6804 and 6805. You will need one of
each. Be sure to specify 2 rubber seals. They are cheap. Buy
the best they have at the bearing shop (ANY bearing shop
will have them). To remove the bearings, you will need to be
careful. On the side with the bearing external to the BB
shell, you will simply be able to drift the bearing to the
outside by using a wooden dowel as a drift punch and
something for support (I used a shop towel and it worked
fine. On the other side, there is a spacer that will come
out first (drift the bearing toward the side without the
tool splines). Again I used a wadded up shop rag for
support, or you can bore out a block of wood with a hole the
size of the threaded part to act as a support for the
bearing shell. For God's sake, use green Loctite on the
spacer only when you have reinstalled the bearings. The
spacer is just a loose press fit and can come out if you
don't Loctite it in. You can also use it on the inner
bearing race to crank shaft interface. Let it set overnight,
but spin it freely every few hours to make sure it isn't
sitting cockeyed ever so slightly like it might if you are
showing significant shaft wear. This wear is compensated for
by the green Loctite in the shaft/bearing interface.
