DIGGER DERRICK
2-5
Digger Derrick Terex South Dakota, Inc. 463280 - 9/14
MAINTENANCE GUIDELINES
WIRE ROPE INSPECTION
The wire rope must be inspected daily for any deterioration, which results in appreciable loss of strength,
described as follows. Refer to the maintenance manual for complete instructions on proper inspection of the
wire rope and criteria for replacement.
• Reduction of rope diameter below the nominal diameter due to loss of core support, internal and
external corrosion, of wear of outside wires.
• A number of broken wires and the degree of distribution and concentration of the broken strands.
• Badly worn outside wires.
• Corroded or broken wires at end connectors.
• Corroded, cracked, bent, worn or improperly applied end connections.
• Severe kinking, crushing, cutting, or unstranding.
• Lack of lubrication.
If any of the above conditions are found, report them to a qualified person to determine if the wire rope
should be replaced. Further information for determining if the rope should be replaced can be found in the
maintenance manual. This inspection also includes wire ropes used for slings and auger roll up cables.
SYNTHETIC ROPE INSPECTION
The synthetic rope must be inspected daily for any deterioration, resulting in appreciable loss of strength,
such as described below.
• Excessive external roughness.
• Glossy or glazed areas, which indicates heat damage.
• Look for flat areas, bumps, or lumps, which indicates core or internal damage.
• Cut or badly frayed strands.
• Areas of discoloration, which could be caused by chemical contamination.
• Stiffness, which would indicate excessive dirt or grit embedded or shock load damage.
• Open the strands and look for powdered fibers, which means there is internal wear.
• Inspect eye connection for proper weaving and damage.
If any of the above conditions are found it should be reported to a qualified person to determine if the
synthetic rope should remain in service. Further information can be found in the maintenance manual for
determining the replacement of the synthetic rope.
If there is any doubt or question about the condition of the synthetic rope -replace it!
NOTE: To extend the useful life of the rope end for end it periodically. Refer to rope
manufacturers information.
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