DIGGER DERRICK
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Digger Derrick Terex South Dakota, Inc. 463280 - 9/14
OPERATION GUIDELINES
DIGGING ANCHOR HOLES
Anchor holes can be dug at any angle, but use extreme caution when doing so. To maintain the correct
angle, adjust the second section extension or rotate the boom to prevent excessive strain on the derrick
when the auger is lowered and raised during the digging and cleaning operation.
Raise the auger one or two feet intermittently during the digging operation. This assists in cleaning out the
hole, and a 7-foot deep hole can be dug without completely removing the auger.
It is easier to dig anchor holes as nearly in line with the Digger Derrick as possible. This permits controlling
the angle of the auger and lowering the auger into the hole using only the lift cylinder and the second section
cylinder.
If it is necessary to dig at any angle to the Digger Derrick, use the lift cylinder, second section, and rotation.
DIGGING ANCHOR HOLES AT AN ANGLE
DIG AS NEARLY IN LINE WITH THE DERRICK AS POSSIBLE
Attach the anchor auger to the end of the hexagon extension shaft of the digger. The depth of the anchor
hole depends on the distance between the auger head and the digger head. Coordination of the two boom
movements, down and in the direction of the anchor hole, must be as nearly perfect as possible.
Use caution when exerting down pressure as well as when pulling the anchor auger from the hole. Keep the
auger turning to prevent bending when pulling and while applying pressure at an angle.
Use caution around lines. The anchor and drive attachments are conductive and if
the Digger Derrick booms, or anchor drive or anchor touches an energized line the
entire vehicle and attachments are energized.
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