Control Unit Solenoid Valve Assembly Replacement
High Quality Groundwater and Surface Water Monitoring Instrumentation
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Model 464 250 psi (sold after September 2013)
®Teflon is a registered trademark of DuPont Corp.
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Tools and Materials Needed
1. 464 Solenoid Valve Assembly - 250 psi (Spare) (#111743)
2. 3/32" Allen Key
3. Small Utility Knife
4. 7/64" Allen Key
5. 11/16" Wrench
6. 14 mm Wrench
7. 1/2" Wrench
8. 7/16" Wrench
9. Teflon
®
Tape
10. Any suitable plastic adhesive (e.g. silicone)
Instructions
1. Turn the Control Unit off and remove the batteries.
2. Use the 3/32" Allen key to undo the four hex screws on the sides
of the Control Unit.
Hex
Screws
Hex
Screws
3. Remove the panel from the Control Unit and flip it over to access
the Solenoid Valve Assembly.
Panel
4. Push down on the fittings to remove the three black tubes from the
Shuttle Valve Assembly, and the two clear tubes from the Solenoid
Valve Assembly (photo shows black tubes removed).
Solenoid Valve
Assembly
5. Use the 7/64" Allen Key to remove the three screws from the
bracket holding the Shuttle Valve Assembly, and carefully slide the
Shuttle Valve Assembly out from the bracket.
464 Solenoid Valve Assembly - 250 psi (Spare)
Shuttle Valve
Assembly
Remove
Tubes
Bracket
Remove
Tube
Remove
Tubes
