MK3 Filament feeder part fell off.

I have the MK3 and was having an issue loading the filament. After making sure the nozzle was clear and it would still not feed, I loosened the screws that hold the feeder assembly together. On the power switch side, the black part flips up and you can see the gears. While looking, a small black piece fell off and I have no idea where it goes. It does not seem to fit in the assembly. It looks kinda of like a squarish 'c'. Any suggestions or is there an assembly diagram to reference?

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Hi Jay,

this black part is called idler plug and prevents dust from entering the extruder. The dust might settle on the filament sensor and decrease its sensitivity to "see" the filament.

More here:

5. E-axis assembly

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Jay Langa will be eternally grateful.
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