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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

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

Loosen

1/ Loosen

Loosen the 2 BTR screws of the left crank.

Unscrew

2/ Unscrew

Completely unscrew the bottom bracket with the crank clamp.

Lift

3/ Lift

Lift the cotter from the left crank using the punch or flathead screwdriver.

Drop off

4/ Drop off

Drop off the right crank by gently "tapping" on the axle with a mallet.

Position

5/ Position

Position the bearing extractor.

Operate

6/ Operate

Operate the bearing extractor with the universal or ratchet wrench. (Repeat steps 5 and 6 on the other side of the bike.)

Clean

7/ Clean

Clean the bottom bracket carefully with a soft cloth.

Grease

8/ Grease

Grease the bottom bracket and the contact surface of the bottom bracket shell.

Position

9/ Position

Position the bottom bracket shell and the bearing cup press.

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.

Clean

11/ Clean

Clean excess grease with a soft cloth.

Grease

12/ Grease

Grease the crankshaft at the level of the bearing surfaces and ribs.

Reassemble

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.

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