Champion Professional 5000 Owner's Manual page 15

Assembly Instructions
9. The tamper is designed to be used in either direction. Use the tamper with
its smaller diameter face down when using the greens auger. Use the tamper
with its larger diameter face down when using the grinding auger. Each face of
the tamper is identified as "GRINDING" or "GREENS" on the handle.
10. The juicer is fully assembled.
13