DIGGER DERRICK
1-20
463280 - 9/14 Terex South Dakota, Inc. Digger Derrick
OPERATION GUIDELINES
JOB SITE SETUP
Before locating the vehicle in position to work, perform a complete survey of the job site. Select a truck
position that is as level as possible.The lift capacity is determined with the vehicle level. If not level the
capacity is reduced. For use with a platform at the boom tip, select a truck position that has a ground slope
of less than 5 degrees. If the platform was supplied as original equipment, the unit has been tested for
stability on a flat firm surface with a maximum slope of 5 degrees. Working on slopes that exceed 5 degrees
may result in vehicle tipping over. The truck as built may have torsion bars only, one set of outriggers, or two
sets of outriggers or a combination of torsion bars and outriggers. The unit has been tested for stability as
originally equipped. The vehicle can only be used with the stability components as originally installed and
tested. If the unit has outriggers they must all be used and set up properly for stability of the unit. If the unit
has torsion bars they must be inspected and maintained to provide the force needed for stability.
For use with a platform:
• Determine if the vehicle is parked on a slope of 5 degrees or less by looking at the level indicators
located by the outrigger controls. The level indicators are only an operator aid, they will show if the
angle at the indicator location is over 5 degrees but will not show if the ground is less than 5 degrees
or how much the frame is twisted. The operator must visually verify the ground condition and that the
truck axles uniformly support the truck weight. If the tires are hanging on one suspension spring,
barely touching the ground, and the opposite suspension spring is up against the rubber stop, the
frame angle is different than the axle angle. The axle suspension is not loaded uniformly and may not
provide proper stability.
• The unit will be equipped with an inclinometer, shown below. The ball must be in the green area. If the
ball is in the red area, the truck is at an angle greater than 5 degrees and the truck position must be
changed before use. Change the position of the truck by repositioning the truck until it is less than 5
degrees and the suspension on each axle is uniformly loaded. If the truck is parked in a location with
less than a 5 degrees slope and the tires equally support the truck and load, proceed to setup the unit.
LEVEL INDICATOR
498819
OVERTURNING HAZARD
May result from overturning machine
If the truck is not level the capacity is reduced
Lift capacity is determined in a level position
of the truck.
For material handling, lifting operations
For lifting people, in a boom tip platform, the
Working on slopes that exceed 5 degrees
may result in truck tipping over.
This unit has been tested for stability on a
maximum slope of 5-degrees.
the Digger Derrick must be level.
truck must be at less than a 5 degree slope.
DEATH OR SERIOUS INJURY
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