DIGGER DERRICK
1-25
Digger Derrick Terex South Dakota, Inc. 463280 - 9/14
OPERATION GUIDELINES
DIGGER DERRICK OPERATION
Operation of a Digger Derrick as a lifting device must follow the appropriate OSHA rules, 1926 subpart CC or
Subpart V. The operator may be required to be certified as a digger Derrick operator. Signal persons and
riggers are required to be competent and qualified. Follow all ANSI and OSHA regulations as determined by
your company’s policy.
The following conditions must be followed when using a Digger Derrick near energized lines or equipment:
1. No part of the boom, attachments to the boom, load line, or the load shall be brought into contact with or
in proximity of an electrically charged conductor.
2. While operating a Digger Derrick, the operator must not create an electrical path between the vehicle
and earth ground.
3. Prior to lifting the boom assembly out of the boom rest, all ground personnel must be warned to stay
away from the vehicle. Ground personnel must not make contact with the vehicle or any apparatus that
is attached to the vehicle until the boom assembly has been returned to the boom rest.
4. All electrically charged conductors in proximity to the work area must be properly covered.
5. The vehicle must be properly grounded and/or barricaded according to your company policies.
6. All employer’s policies and governmental rules and regulations must be followed.
All boom operations must be smooth. When starting or stopping, avoid jerking by slowly metering the control
valves. Start and stop all boom movements with a low engine speed to make it easier to “feather” the
controls for smooth operation.
The controls provide proportional metering of the boom function. The farther the control is moved from the
neutral position the faster the function will operate.
FEATHERING CONTROL VALVE
Lack of proper training and failure to follow safe work procedures may result in
serious injury or death.
A fiberglass upper boom, in clean and undamaged condition, will only provide
dielectric protection when fully extended and the load line does not cross the
insulating section. If the upper boom is not fully extended, or extended past the
minimum extension decal (if equipped), the Digger Derrick is considered not
insulating.
Always operate boom controls while at the control station on the vehicle. Never
operate the Digger Derrick boom controls while standing on the ground, unless
operating with radio remote controls where the operator does not touch the
vehicle(s) and the ground at the same time.
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