Digga PDD - Page 31

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Operating Procedure - SCREW ANCHORING (PILE/PIER)
• Installation is to be performed by a trained and/or certied installer.
• Connect the manufacturer’s approved adapters to the Planetary drive head. If you have two speed
operation, start installation in the high speed, low torque setting and start installing pile. As the pressure
builds & the torque increases, change the two speed controller to High Torque low speed and complete
the pile installation to your required depth and torque. If your drive is single speed install the pile in one
continuous motion until the desired depth and torque is achieved.
• Install pile/pier with a continuous motion. The rate should match the pitch on the pile. Make sure to apply
just enough downward pressure to help the advancement of the pile into the ground, but not to much that
you are driving or drilling the pile into the ground. Always maintain a plumb line so that you do not bend
the pile.
All 2 Stage reduction Planetary model drives (PD15-PD50) specied for anchoring applications must be
tted with an optional ECV - Energy Contol Valve (Patented). During the screw anchoring process energy
builds up in the pile/pier, when the operator stops installation as torque is reached, the pile/pier temporarily ‘icks’
back or rotates back forcing energy up the pile/pier, back up through the gear sets and into the motor, momentarily
turning the motor into a pump. The ECV is designed to protect the motor from this action and essentially grabs
the oil and gently bleeds it back down the hydraulic lines. The sound it makes is a gentle ‘swoosh’, this is how you
know the valve is working. Ine󰀩ciencies occur with machinery that can reduce the torque output, such as heat,
cold, age of machine etc.. It is therefore highly recommended that Torque monitoring equipment to keep record of
the torque and pressure is installed. Contact Digga Head O󰀩ce or your local Digga Dealer for further information
regarding torque monitoring options.
11 Operating Instructions
It is the responsibility of the installer to correctly calculate, plan and execute the installation of the piers to the nominated
required torques. Digga does not accept any liability or consequential loss that is incurred from incorrect installation, over
torquing or under torquing of piles.
NOTE