Pulley Bearing Replacement




Replacing the Bearings

You will need:

  • 3mm Allen Driver
  • 2.5mm Allen Driver
  • Small flathead screwdriver

To replace the bearings on your printer:

  1. Use a 3mm Allen Driver loosen the belt's tensioner by turning it 3-4 full rotations.

  2. Use a 2.5mm Allen Driver loosen and remove the two screws that hold the tensioner in place.

  3. Push the shaft pin through the pulley and removed the pulley from the belt.

  4. When you remove the pin and pulley, you will have 5 pieces.
    • 1 Pin
    • 1 Pulley (with old bearings still installed)
    • 2 concave washers
    • 1 tensioner assembly

  5. Use the small flathead screwdriver to push the bearings out of the pulley.

  6. Discard the old bearings and then press the new bearings into the pulley.

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Reinstalling the Pulley

You will need:

  • 2.5mm Allen Driver

To reinstall the pulley:

  1. Align the two washers (with the convex ends facing the pulley) and then wrap the belt around the pulley.
  2. Insert the pulley (with the washers still in place) into the tensioner assembly.
  3. Line up the washers and push the shaft pin through the center hole.
    Note: Be sure the pin goes all the way through the assembly. If the washers shift such that they are off-center, the pin may not be able to slide all the way through.

  4. After the pulley is successfully installed, ensure that the rest of the belt is properly routed through the idler pulleys located in the Y Axis rail.
  5. Reinstall the tensioner assembly by screwing the two screws back into place.

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