Remove A Shimano Hollowtech Bottom Bracket

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Introduction

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

Step 1

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

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

Step 2

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<h3>Step 2</h3><p>Remove the cranks
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Acces the bottom bracket

Remove the cranks

Step 3

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<h3>Step 3</h3><p>Push the ring spanner onto the external splines on the left side of the Shimano Hollowtech bottom bracket. Hold it in place with one hand while you apply torque with the other
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Ring spanner

Push the ring spanner onto the external splines on the left side of the Shimano Hollowtech bottom bracket. Hold it in place with one hand while you apply torque with the other

Step 4

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<h3>Step 4</h3><p>Start the left-hand cup moving anti-clockwise
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Loosen The Left

Start the left-hand cup moving anti-clockwise

Step 5

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<h3>Step 5</h3><p>Move the ring spanner to the right side of the Shimano Hollowtech bottom bracket and start it moving clockwise. Keep going until the unit comes out.
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Loosen And Remove The Right Side of theBottom Bracket

Move the ring spanner to the right side of the Shimano Hollowtech bottom bracket and start it moving clockwise. Keep going until the unit comes out.

Step 6

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<h3>Step 6</h3><p>Move back to the left side and unscrew the rest of the unit. You may or may not need to use the ring spanner for this.
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Return To The Left

Move back to the left side and unscrew the rest of the unit. You may or may not need to use the ring spanner for this.

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