La Marzocco SWIFT EPSB, Troubleshooting Manual

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WARNING Technician Tasks only to be completed by qualified and skilled service personnel.
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9. Remove the adjustment gear assembly from the upper burr carrier
10 . Rotate the upper burr carrier anticlockwise until the threads are free allowing removal
11. Remove the upper burr carrier
12 . Using a flat-tip screwdriver, remove the screws that secure grinding burrs
13 . Vacuum and clean out the burr area. Ensure the area is totally free of coffee debris
14. Installnew grinding burrs.
15. Clean and lube the o-ring on the upper carrier.
16. Reinstall the upper mill carrier.