DIGGER DERRICK
1-29
Digger Derrick Terex South Dakota, Inc. 463280 - 9/14
OPERATION GUIDELINES
READING THE LOAD CAPACITY CHART
The chart is divided into areas depending on the extension of the boom. A section is considered extended
unless fully retracted. The areas of the chart are labeled:
• FULLY RETRACTED
•All sections are fully retracted.
• 2ND SECTION (INTERMEDIATE) EXTENDED
•Only the second section extended. All other boom sections are fully retracted.
• 3RD SECTION (UPPER) EXTENDED — 2ND SECTION (INTERMEDIATE) RETRACTED
•Only the third section extended. All other boom sections are fully retracted.
• 2ND (INTERMEDIATE) AND 3RD (UPPER) SECTION EXTENDED
•Both the second section and the third section are extended.
• 4TH SECTION EXTENDED
•If not equipped with a fourth section this block will be blank. If the fourth section is extended, this
section of the chart applies. It does not depend on position of second or third section. Any time the
fourth section is not retracted, this section will give the capacity.
NOTE: A section is considered extended if it is moved out of the stowed or fully retracted
position.
Each section in the chart has a column that shows:
• The angle of the lower boom.
• The maximum load radius for that boom angle and extension.
• The maximum sheave height for that boom angle and extension.
• The load capacity in Zone A (Over the rear of the vehicle).
• The load capacity in Zone B (Over either side of the vehicle).
Determine the boom angle by looking at the angle indicator on the side of the boom. The boom angle is used
to determine the capacity on the load capacity chart. When the indicator falls directly on an angle, then use
this value in the load capacity chart. If the indicator falls in between two angles, use the lower angle. For
example, if the boom angle is between 15 and 30 degrees, the 15 degree value from the load capacity chart
is used.
Determine the Zone by identifying where the boom is located relative to the truck. Zone A is over the rear of
the truck between the corners of the bed. Zone B is to the sides between the corners of the truck bed.
LOAD LINE
The right side of the chart lists the Load line strength in the note:
”CAUTION: MULTIPLE PART LINES ARE REQUIRED FOR LOADS ABOVE XXXX.”
The XXXX is the load capability of the line originally supplied with the unit. If the line is replaced it must be
replaced with a line that has the strength as shown of on the load chart. If the capacity determined by the
Load Capacity Chart or the Jib Chart exceeds the value XXXX given on the chart the line must be multi-
parted or the load limited to the line capacity.
If an optional jib is used, be sure the load does not exceed the jib capacity chart.
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