Replacing a Press-Fit Bottom Bracket
The Press-Fit is a standard bottom bracket that tends to become the norm. In this tutorial, we guide you step by step for the dismantling and replacement of the Press-Fit bottom bracket.
Tools required
Teflon grease / Punch or small flat-bladed screwdriver / Mallet / 5mm BTR wrench / Crank clamp / Universal or ratchet wrench / Bearing extractor/ Bearing cup press
1. Loosen
Loosen the 2 BTR screws of the left crank.
2. Unscrew
Completely unscrew the bottom bracket with the crank clamp.
3. Lift
Lift the cotter from the left crank using the punch or flathead screwdriver.
4. Drop off
Drop off the right crank by gently "tapping" on the axle with a mallet.
5. Position
Position the bearing extractor.
6. Operate
Operate the bearing extractor with the universal or ratchet wrench. (Repeat steps 5 and 6 on the other side of the bike.)
7. Clean
Clean the bottom bracket carefully with a soft cloth.
8. Grease
Grease the bottom bracket and the contact surface of the bottom bracket shell.
9. Position
Position the bottom bracket shell and the bearing cup press.
10. Press
Press the bottom bracket shell into the bottom bracket without overdoing it. We advise you to press the bottom bracket shells one by one because you may wrongly position them if you press both at the same time.
11. Clean
Clean excess grease with a soft cloth.
12. Grease
Grease the crankshaft at the level of the bearing surfaces and ribs.
13. Reassemble
Reassemble the pedals and crank on the left in the following order:
1. Screw the crank cap to the max (check the clearance and repeat the operation if necessary, this tightening must be done by hand so as not to constrain the bearings)
2. Fold down the cotter (it must go in effortlessly, if it doesn't, it mean that the crankset or the bottom bracket shells aren't mounted correctly).
3. Tighten the 2 BTR screws gradually.
