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Replacing shake incubator drive belts
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.. note::
    If the shake incubator reports that it is actively shaking but isn't, its drive belt may need to be replaced.
    Top shake incubator drive belt replaced by CJ and MC 7/17/2025.


Required materials
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Part                     McMaster part number
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Drive belt               9003K47
Stainless steel screw    92210A622
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Procedure
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1. Buy more McMaster parts if needed. We should have extras of most in the cabinet with the toolbox.
2. Remove top cover, counter weight, and motor assembly.
   
.. figure:: /img/shake_inc_top.jpg

      Top cover
.. figure:: /img/counter_weight.jpg

        Counter weight. Screws pictured correspond to McMaster part number 92210A622.
.. figure:: /img/motor_assembly.jpg

        Motor assembly
3. Remove drive belt from underneath motor assembly and replace with new drive belt.
   May need to loosen screws holding motor in place in order to get the drive belt around it.

.. figure:: /img/drive_belt_removal.jpg

    May need to loosen screws circled in blue and move motor a little closer to rotator 
    in order to get the belt around.
.. figure:: /img/drive_belt_on.jpg

    Place new drive belt around rotator and motor; be sure to adjust screws again to ensure the belt is taught.
4. Place motor assembly back in incubator, ensuring power supply is threaded underneath
   motor assembly and through the hole near the front, beside the power connection. Plug in power.

.. figure:: /img/shaker_power_connection.jpg

    Note the 3-3-2-pronged orientation that must match when being plugged in.
5. Secure the motor assembly with the washer combo shown below.
   
.. figure:: /img/motor_assembly_washer_combo.jpg
6. Place counter weight back in and turn on to confirm the incubator now shakes.
7. Turn off the incubator and replace the top cover.

.. figure:: /img/shaker_top_insert.jpg