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LUBRICATING THE SOURCE ROD
If the source rod does not slide up and down freely, the source rod
bearing may require lubrication.
✓
Using a 9/64-inch Allen wrench, remove the six screws that
hold the top shell to the gauge base.
✓
Clean the screws and set them aside.
✓
Carefully remove the gauge top shell and slide it up, out of the
way. To keep it out of the way, tie the top shell to the handle.
✓
To catch any grease, place a rag or cloth under the vent valve
located below the grease fitting on the source rod tower.
✓
Using a standard 16-oz grease gun loaded with a
Magnalube
-G cartridge, apply five shots of lubricant or until
all dirty grease is ejected from the vent valve and clean grease is
visible.
✓
Re-assemble the gauge.
REPLACING GASKETS
The Model 3451 employs two o-rings to protect its electronics from
moisture, dirt, and debris. However, if the gauge has been exposed
to extremely wet weather or high humidity, or if the gauge was used
in the cold and stored in a warm building, condensation may form
inside the gauge. If this happens the top shell should be removed
and the gauge allowed to dry. Use a hair dryer (on low heat) if
necessary to remove any built-up moisture. If moisture continues to
be a problem or debris is present inside the gauge base, the gaskets
or O-ring may need replacing.
To replace the top shell/base O-ring, remove the screws that hold
the top shell to the gauge base. Lift the top shell from the gauge
base. Remove the O-ring from the gauge base. Coat the replacement
O-ring with vacuum grease. Install the new O-ring in the groove on
the base. Replace the top shell and tighten the top shell screws.
Appendix C–28
Summary of Contents for Enhanced RoadReader Plus 3451
Page 7: ...Model 3451 vii NOTES...
Page 17: ...xvi NOTES...
Page 29: ...1 12 NOTES...
Page 33: ...2 4 Figure 2 1 Effect of Moisture on Depth of Measurement...
Page 85: ...4 22 NOTES...
Page 106: ...Model 3451 6 3 Figure 6 1 Offset Menu 6 OFFSETS CALIBRATION...
Page 114: ...Model 3451 6 11 Figure 6 10 Moisture Offset Erase Prompt 6 OFFSETS CALIBRATION...
Page 131: ...6 NOTES...
Page 141: ...7 10 Figure 7 5 Project Data Spreadsheet...
Page 145: ...7 14 Figure 7 8 Project Setup Display Figure 7 9 Standard Counts Display...
Page 147: ...7 16 Figure 7 10 Project Status Display Figure 7 11 Source Decay Display...
Page 149: ...7 18 Figure 7 12 Stat Test Display Figure 7 13 Drift Test Display...
Page 153: ...7 22 NOTES...
Page 166: ...Model 3451 Appendix A 13 Figure A 3 Cleaning the Sliding and Fixed Blocks...
Page 174: ...Model 3451 Appendix A 21 NOTES...
Page 175: ......
Page 183: ...Appendix B 8 NOTES...
Page 221: ...Appendix D 6 NOTES...
Page 223: ...Appendix E 2 STANDARD COUNT LOG Gauge Serial Number Date Moisture MS Density DS1 Density DS2...
Page 225: ...Appendix E 4 STANDARD COUNT LOG Gauge Serial Number Date Moisture MS Density DS1 Density DS2...
Page 227: ...Appendix E 6 STANDARD COUNT LOG Gauge Serial Number Date Moisture MS Density DS1 Density DS2...
Page 229: ...Appendix E 8 STANDARD COUNT LOG Gauge Serial Number Date Moisture MS Density DS1 Density DS2...
Page 235: ...Appendix G 4 NOTES...