DIGGER DERRICK
1-22
463280 - 9/14 Terex South Dakota, Inc. Digger Derrick
OPERATION GUIDELINES
SETTING UP ON A SLOPE
If the chassis is set-up across the slope as shown below, the surface can be up to 5 degrees from level but
must be firm and flat where tires are located. If one side of the chassis is low, extend the low side outrigger
first and make sure that firm contact is made. If full extension does not make firm contact, the outrigger pad
must be blocked up. Always chock the wheels. Keep the boom on the uphill side. If the slope exceeds 5
degrees before setting the outriggers the tires must also be blocked and cribbed so the truck is parked at
less than 5 degrees. If the unit has one set of outriggers do not level the truck with the outriggers. On units
with one set of outriggers using the outriggers to level the truck does not change the slope, it reduces the
truck suspension’s ability to support the load and provide stability.
VEHICLE SETUP ACROSS THE SLOPE
If the vehicle must be set up with the slope, always keep the boom on the uphill side of the vehicle and
always work off the rear of the vehicle.
VEHICLE SETUP WITH THE SLOPE
If the outrigger support surface is not level with the truck, the bank may need to be cut away or brought up to
a level so the outrigger will provide proper support. The ground must be able to support the load of the
outrigger without sinking. If the chassis must be set up where an outrigger extends into a ditch or gutter and
the full extension does not make firm contact, the outrigger must be blocked or cribbed up.
If the vehicle must be set up so an outrigger would be set on a curb with the vehicle in the street, the
outrigger span will be shortened. Reposition the vehicle.
All of the above conditions may affect the stability of the vehicle and reduce the load capacity of the vehicle.
Working on slopes that exceed 5 degrees
may result in vehicle tipping over when
used to lift personnel in boom tip platform.
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