Hi,
My YS640 (U26) has an auger that is squeaking, it is woking fine, but the noise is new, any ideas?
First thing to do is to empty all the pellets from the hopper and the auger, and verify that there isn't anything that may be stuck in the auger.
If the auger is clean, you can follow these directions to make sure that the auger bolts are tight. You do not need to follow all the instructions and remove the auger motor, etc., just use the instructions to tighten the auger bolts: download/Install%20and%20Repair/Auger%20Bolt%20Fix.pdf