This can cause the pile to momentarily 'kick back' and force the energy back up the screw pile through the drive shaft, the gear box and the hydraulic motor. This action effectively turns the motor into a high speed pump, generating cavitation of the motor which causes motor failure and potentially expensive replacement costs.
See the diagram below, the red arrow demonstrates the force of the energy up the screw pile.
Digga's flow reversal bypass valve (ECV) is fitted as standard to Digga Screw Anchor Drives and can be retro fitted to drilling drives as required.
Alternatively visit our website for more information on Digga auger drives and screw anchor drives.
For further information on the ECV you can contact your local Digga dealer or give us a call on 1300 2 34442