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Publication Number: FHWA-HRT-05-153
Date: December 2006

Long-Term Pavement Performance Program Falling Weight Deflectometer Maintenance Manual

Chapter 6. Conclusion

Maintaining and regularly servicing FWDs is crucial to equipment performance, longevity, and quality of acquired data. Routine maintenance provides insurance against expensive repairs and parts replacement, which can also result in expensive downtime. The information in this document is to help people who are responsible for ownership, management, operation, or service of FWDs. This document is particularly useful to people who use FWDs in highway infrastructure construction, rehabilitation, maintenance, and management.

While the contents of this document directly apply only to the Dynatest Model 8000 in use by the LTPP program, the instructions can also help on some earlier or later models, and even other brands of FWDs. Troubleshooting and maintenance advice for the tow vehicle were excluded from this document. A variety of tow vehicles perform the same function, each having its own variables.

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The Federal Highway Administration (FHWA) is a part of the U.S. Department of Transportation and is headquartered in Washington, D.C., with field offices across the United States. is a major agency of the U.S. Department of Transportation (DOT).
The Federal Highway Administration (FHWA) is a part of the U.S. Department of Transportation and is headquartered in Washington, D.C., with field offices across the United States. is a major agency of the U.S. Department of Transportation (DOT). Provide leadership and technology for the delivery of long life pavements that meet our customers needs and are safe, cost effective, and can be effectively maintained. Federal Highway Administration's (FHWA) R&T Web site portal, which provides access to or information about the Agency’s R&T program, projects, partnerships, publications, and results.
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United States Department of Transportation - Federal Highway Administration