Fit A Shimano Hollowtech Bottom Bracket

Introduction

A Shimano Hollowtech bottom bracket may have a shell made of metal or tough plastic.

Step 1

<h3>Step 1</h3><p>Shimano Hollowtech bottom brackets need a special ring spanner that fits into splines and allows each side to be screwed in and out.</p>
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Tools

Shimano Hollowtech bottom brackets need a special ring spanner that fits into splines and allows each side to be screwed in and out.

Step 2

<h3>Step 2</h3><p>Clean the threads on the frame and grease them with anti-seize assembly grease.</p>
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Grease

Clean the threads on the frame and grease them with anti-seize assembly grease.

Step 3

<h3>Step 3</h3><p>The unit is marked 'L' and 'R'. The right element contains the axel sleeve. </p>
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Left To Right

The unit is marked 'L' and 'R'. The right element contains the axel sleeve.

Step 4

<h3>Step 4</h3><p>Carefully introduce the right side of the Shimano Hollowtech bottom bracket into the threads, screwing anti-clockwise. Finger power is enough. Too much force may damage the threads.</p>
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Right

Carefully introduce the right side of the Shimano Hollowtech bottom bracket into the threads, screwing anti-clockwise. Finger power is enough. Too much force may damage the threads.

Step 5

<h3>Step 5</h3><p>Introduce the left element into the other side and screw it in carefully with your fingers.</p>
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Left

Introduce the left element into the other side and screw it in carefully with your fingers.

Step 6

<h3>Step 6</h3><p>Use the ring spanner to screw the right side of the Shimano Hollowtech bottom bracket tight</p>
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Right again

Use the ring spanner to screw the right side of the Shimano Hollowtech bottom bracket tight

Step 7

<h3>Step 7</h3><p>Use the ring spanner to tighten the left side.</p>
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Left again

Use the ring spanner to tighten the left side.

Step 8

<h3>Step 8</h3><p>Remount the cranks.</p>
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Remount the cranks.