Let me see if I can help as I have an Ender 3 V2.
The extruder wheel/dial has no impact on your 3d prints. Its only purpose is to make it easier to load and unload filament. You turn the wheel to the left to push the filament into the Bowden tube in the same way the stepper motor would push the filament. You turn it to the right to pull the filament out of the Bowden tube.
Your printer will work just fine with this completely off. I find it is much faster to squeeze the lever that releases the pressure between the gear and the idler and then just push the filament in or pull it out.
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This is a picture of the extruder with the wheel removed. It just lifts on and off.
The lever on the left, which has a pivot point on the bottom left and pushes on the spring on the top, will move the idler wheel (with the bolt in it) away from the feed gear when pressed. Your filament sits between the gear and the idler. With no filament in the extruder, the spring should be tight enough so the gear just touches the idler.
The gear teeth should be centered on the idler so the filament will run between them smoothly.
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This picture has the blue wheel on top of the stepper motor drive shaft. I generally lift it off when initially loading filament so I can see that the filament is sitting properly between the gear and the idler and to make it easier to feed the filament into the Bowden tube.
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As the other participants in the forum have mentioned you want enough pressure on the filament so the teeth of the extruder gear to hold it but not so much that it eats up the filament.