Hollowtech Bottom Bracket Replacement

はじめに

With the many cranksets and bottom bracket types in the market, this guide specifically focuses on replacing a vision track crankset and similar Hollowtech II crankset. Since the vision track crankset does not have a square-tapered bottom bracket, different tools are required to remove and install the crankset. As the crankset is an important part of a bicycle's drivetrain, maintaining and keeping it in good shape is important. Before starting the guide, note that working on a bicycle is not very difficult but it can be messy.

必要な工具と部品

手順1 Bottom Bracket

Hollowtech Bottom Bracket Replacement, Bottom Bracket: 手順 1、 1の画像 1

Secure the bicycle using a bicycle repair stand or wall.

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手順2

Use pliers to remove the spring clip from the chain's master link clip.
Remove the master link plate, plate and pin assembly, and finally the chain.

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手順3

Hollowtech Bottom Bracket Replacement: 手順 3、 3の画像 3

Use a 10mm Allen key socket and ratchet to loosen the left crank arm by twisting counter clockwise.
Remove the left crank arm.
Remove the spacer(s) and washer.

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手順4

Hollowtech Bottom Bracket Replacement: 手順 4、 3の画像 3

Either push or pull the crank arm fully out exposing the left bottom bracket.

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手順5

Use Park Tool's BBT-27.3 16 notch bottom bracket tool to loosen the left bottom bracket by twisting counter clockwise.
Remove the bottom bracket.

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手順6

Use Park Tool's BBT-27.3 16 notch bottom bracket tool to loosen the right bottom bracket by twisting counter clockwise.
Remove the bottom bracket.

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手順7

Hollowtech Bottom Bracket Replacement: 手順 7、 3の画像 3

Carefully pull out the bottom bracket shell.

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終わりに

Congratulations, you have completed the guide. To reassemble the crankset, follow these instructions in reverse order. Make sure to grease the threads, bottom bracket shell, and crankset accordingly. In addition, torque down the crank arm (38-41Nm) and bottom bracket (40-50Nm) to the manufacturer's recommended specification.