Functions:

Digging the Pit (The Topsoil & the Gravel).
Loading the unwashed Gravel on the Dumper
Feeding the Trommel
Offloading the washed Gravel.

Productivity :

Digging & Loading: 50-70 Cbm of gravel per hour
Feeding the Trommel: Its able to Feed over 6 Cbm of unwashed Gravel per minute.
Offloading the washed Gravel: Its able to Feed over 6 Cbm of washed Gravel per minute