DeLonghi grinder won't spin, anyone tackled this teardown?

[Thomas Martinez]

See a writeup on how to fix the grinder on DeLonghi machines when it stop spinning. Thought it would of worth getting opinions from others who have done this.
Take the machine apart and find an orange rubber ring on the grinder. Remove the ring and the white bracket that hold the grinder. Remove the center screw by turning it clockwise (counter intuitive). Remove the blade and clean it. Put the blade back in place and tighten the center screw going at the opposite direction (anticlockwise). Replace the rubber ring and white bracket. Ensure there is no coffee ground or other foreign object trapped in the grinder. If it still will not spin then the grinder motor is likely broken and need to be replaced.
Out of curiosity, how often does the grinder fail due to motor issues vs. Buildup of ground coffee? I imagine the reverse thread for the center screw is a common point of frustration for new machines. Is there a good place to get replacement grinder motor for DeLonghi coffee machines? Have any of you performed these steps to fix the grinder issues on your DeLonghi coffee makers?

 

[The Muppets Turtl]

Reverse threaded screws is common with appliances that have spinning blades or discs. Think angle grinders or circular saws. Food processors, yes. The rotation of the blade will eventually loosen a right-handed thread over time.

 

[Funny Fowl]

Done maybe 5 of these now. 4 out of 5 times its just packed grounds and oil gunk around the burr. The motor itself fail less often than people think. The reverse thread for the center screw is something that trips people up when they is first doing this fix.

 

[Proud]

When you reinstall the grinder blade and tighten the screw anticlockwise, is that because the motor tend to spin clockwise and the screw self-tightens by itself? Or is there another reason for doing it?