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TREK SERVICE INFORMATION August 2016
3. Slide the drive side axle through the seal seat and bottom bracket shell (Figure 9).
4. Line up the splines of the bottom bracket axle and press the axle together. If necessary,
tap the ends together with the heel of your palms.
5. Insert the crank bolt from the drive side (Figure 10) and tighten to the torque
specifications (see page 38).
6. Follow the steps in “Inspecting the bottom bracket.”
To Remove The Bottom Bracket Bearings
With the Campagnolo system, each of the two bearings are pressed onto one of the
halves of the bottom bracket axle. To remove the bearings, follow the Campagnolo service
instructions.
Inspecting The Bottom Bracket
Every 3 months check the bottom bracket adjustment.
To Check The Bottom Bracket Bearing Adjustment
1.
Lift the chain from the chainrings.
2. Rotate the crank so that one of the arms is parallel to the seat tube.
3. Put one hand on the crank arm and one hand on the seat tube, and attempt to move
the crank arm laterally toward and away from the seat tube.
4. Spin the cranks.
If the crank feels or sounds loose, or if the motion stops abruptly or you hear a grinding
noise coming from the bearings, readjust the bearings or take the bike to your Trek
dealer.
