4-18 Maintaining and Troubleshooting the Waters 515 Pump
12. Prime the pump as described in “Priming the pump” on page 3-15. If you
notice leaks, verify pump head and plunger seal installation.
13. Recalibrate the pump flow rate as described in “Calibrating the flow
rate” on page 4-7.
Cleaning and replacing check valves
Clean the inlet and outlet check valves every 6 months, or more frequently if
required by your application. It is a good idea to keep a spare set of clean
check valves on hand. If you need to remove the check valves for cleaning, you
can install the spare check valves immediately, then clean the dirty check
valves at a convenient time.
This section describes how you:
• Remove and install inlet check valves for cleaning or replacement.
• Remove and install outlet check valves for cleaning or replacement.
Cleaning and replacing the inlet check valve
Required materials
• 5/16-inch open-end wrench (Startup Kit)
• 1/2-inch open-end wrench (Startup Kit)
• Priming syringe (Startup Kit)
• Fitting plug (Startup Kit)
•Replacement check valve
• Methanol
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