Wednesday, 4 October 2017

The Digga ECV and pile kick back when installing screw piles.

Digga Australia - digga drive unit
Screw piles or helical piles are installed to an engineered torque specification. By the time installation torque is reached and the operator stops the machine, the screw pile has built up rotational energy - similar to a rubber band on a wind up model aeroplane.

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.

The Digga ECV effectively protects the motor in your drive from rapid oil decompression and easily converts your auger drive into a dedicated screw anchor drive.

Digga Australia - drilling drives - ECV
To retro fit the ECV to your auger drive follow the 3 steps below:

For more information on screw piling have a read of our other screw piling blog articles, click here.

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

Monday, 2 October 2017

Digga tips - servicing and changing the oil of your Digga drive unit.

It is important to service your Digga drive unit and change the oil regularly as per the owners manual. This will ensure longevity and performance of your drive.

  • The oil in your drive unit is independent to your hydraulic system.
  • Oil from your machine does not lubricate your drive unit.
  • As a result your auger drive requires regular oil changes to remain in perfect working condition.

The images below illustrate the importance of regular servicing of your auger drive in accordance with the owners manual.


The 3 drive units were tested in our Hydraulic Cyclic Testing Unit where 10 years of wear and tear was simulated. Oil was changed in the drives at different intervals illustrating the wear caused by neglect. Changing the oil and a regular service of your Digga drive unit is crucial to its longevity and performance.
Digga Australia - servicing tips - drive units

For more information on the Digga Service offering visit www.digga.com/service-spares