DIGGER DERRICK
1-26
463280 - 9/14 Terex South Dakota, Inc. Digger Derrick
OPERATION GUIDELINES
A hydraulic pressure gauge enables the operator to determine the pressure of the fluid in the hydraulic
system. Attention to this gauge permits the operator to know when the maximum allowable pressure is being
approached, at which point the relief valve operates.
Lift the boom off the boom rest and elevate high enough to clear all body obstructions before rotating.
Always allow extra clearance above and below the booms from any obstacle when lifting a load to allow for
deflection.
Make certain that all personnel are clear of the workzone and that there is sufficient overhead clearance
before operating the Digger Derrick.
CLEAR ALL BODY OBSTRUCTIONS BEFORE ROTATING
KEEP LOADS AS CLOSE TO THE GROUND AS POSSIBLE
When lifting loads, the booms deflect a certain amount then when the load is
relieved, the booms will return to the normal position.
Inspect all slings, hooks, rigging, and lifting attachments daily before use. All
items must have sufficient safe working load capacity for loads being lifted.
Before lifting any loads, consult the load capacity chart located near the controls
and make sure that the load to be lifted does not exceed the capacity shown for the
desired boom length, elevation, and load radius. A practice run may be needed to
determine if the required movements will remain within the load capacity of the
Digger Derrick.
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