How to Replace or Service the Bearings in Your Shimano FC-5700 Crankset

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The Shimano FC-5700 [paid link] crankset is a high-quality component designed for road cyclists looking for performance and durability. However, like all bike parts, the bearings in the crankset will eventually wear out or require maintenance. Replacing or servicing the bearings is crucial to maintain the smooth performance of your drivetrain and ensure optimal power transfer.

Tools Required:

  • 8mm Allen wrench [paid link]
  • Crankset removal tool
  • Torque wrench [paid link]
  • Pedal wrench [paid link]
  • Bearing press [paid link] tool (if replacing bearings)
  • Grease
  • Clean rag
  • Bicycle stand (optional)
  • Small flathead screwdriver (for prying out old bearings)

Understanding the Importance of the Bearings

The bearings in your Shimano FC-5700 [paid link] crankset are responsible for allowing the crankset to rotate smoothly. They are an essential component in minimizing friction and ensuring that power is efficiently transferred from your legs to the pedals. Over time, dirt, water, and wear can cause the bearings to degrade, leading to increased resistance, noise, and potential damage to other parts of the crankset. Regular maintenance and timely bearing replacement can prevent these issues.

How to Replace the Bearings in the Shimano FC-5700 Crankset

Replacing the bearings in your Shimano FC-5700 [paid link] crankset is a straightforward task if you follow the correct procedure. Here are the step-by-step instructions for replacing the bearings:

1. Remove the Crankset

  • Start by removing the crankset from the bike. Use the pedal wrench [paid link] to remove the pedals from the crank arms.
  • Use the 8mm Allen wrench [paid link] to remove the bolts that attach the crank arms to the bike’s bottom bracket.
  • After loosening the bolts, carefully remove the crankset from the bike.

2. Inspect the Crankset

  • Once the crankset is removed, inspect the area around the crank arms and bottom bracket for any signs of wear or damage. Clean the components to ensure no dirt or debris is present.

3. Remove the Old Bearings

  • Use the bearing press [paid link] tool or a small flathead screwdriver to carefully pry out the old bearings from their housings. Be gentle to avoid damaging the crankset or the bearing seat.
  • If the bearings are stuck, lightly tap around the edge with a rubber mallet to loosen them before attempting to remove them.

4. Clean the Bearing Housing

  • After the old bearings are removed, use a clean rag to wipe down the bearing housing area. It’s important to ensure there is no dirt, grime, or rust left in the housing before installing new bearings.
  • Apply a light layer of grease to the inside of the bearing housing. This will make it easier to install the new bearings and help prevent future corrosion.

5. Install the New Bearings

  • Press the new bearings into place using a bearing press [paid link] tool. Ensure that the bearings are aligned correctly with the housing and seated properly.
  • Be careful not to overtighten the bearings during installation, as this could cause damage or distortion to the crankset.

6. Reassemble the Crankset

  • Once the bearings are installed, place the crankset back onto the bottom bracket.
  • Reattach the crank arms to the bike using the 8mm Allen wrench [paid link], ensuring that the bolts are tightened to the manufacturer’s recommended torque specification.
  • Reinstall the pedals on the crank arms using the pedal wrench [paid link].

7. Test the Crankset

  • Spin the crankset by hand to ensure it rotates smoothly and without any resistance or noise. If you notice any unusual sounds or friction, check the installation and alignment of the bearings again.

Tips for Maintaining Bearings in the Shimano FC-5700 Crankset

  • Clean Regularly: To extend the lifespan of the bearings, clean the crankset regularly, especially after riding in wet or muddy conditions.
  • Lubricate the Bearings: Apply a small amount of grease to the bearings when installing them to reduce friction and prevent rust.
  • Check for Play: After installing the bearings, check for any play or wobble in the crankset. If there is excessive movement, the bearings may not be properly seated or the crankset may require reassembly.

When to Replace the Bearings

Bearings in the Shimano FC-5700 crankset should be replaced when you notice:

  • Grinding or Scraping Sounds: This indicates that the bearings are worn or damaged.
  • Resistance: If the crankset feels stiff or difficult to rotate, it may be time to replace the bearings.
  • Excessive Play: If there’s noticeable play or wobble in the crankset, this can be a sign that the bearings are no longer functioning properly.

Conclusion

Replacing or servicing the bearings in your Shimano FC-5700 crankset is a relatively simple procedure that can significantly improve the performance and lifespan of your bike. By following the proper steps and maintaining the bearings regularly, you can ensure that your crankset remains smooth and efficient, providing you with better power transfer and a more enjoyable ride.