16
Circlips and Bearing Installation
CAUTION
DO NOT FACE, MILL OR MACHINE THE BOTTOM
BRACKET SHELL FOR ANY REASON. Doing so
can result in serious damage and possibly a
ruined bike frame.
CAUT002
Take the following steps only:
1. Always thoroughly clean the inside surface
of the BB shell with a dry shop towel.
2. Inspect the circlip grooves (a) and the
machined bearing seats (b) on both sides of
the bottom bracket. And, carefully inspect
the BB (outer and inner surfaces) and frame
welds for evidence of fatigue cracking or
damage.
3. Apply a thin film of bearing grease to the
BB circlip groove. Install the flat end (a) of
the circlip into the groove first, then moving
clockwise, push the clip into the groove until
it is fully seated in the groove. Install the
other circlip the same way.
4. Apply a light coating of grease to the
bearings seals (to inhibit moisture
penetration). Lightly grease entire inside
surface of the bottom bracket.
6 Install the drive side bearing first. Use the
tool arrangements for each bearing side
shown in Figure 18. Press the bearing until
they bottoms against the circlip.s Remove
the tools and press.
a
1
Figure 15
BB Circlip
WARNING
WEAR HAND AND EYE PROTECTION Circlips
may have sharp edges that can cut your
fingers. A circlip can cause serious eye injury
if it springs out of your hands or the work
unexpectedly.
WARN006
