- Replace the seals and pistons
- Replace the PTFE frit
- Replace the cartridge in the Active Inlet Valve
- Clean the outlet ball valve
- Clean or replace the solvent inlet frits
Routine pump maintenance should be done on a regular basis to keep your Agilent LC system performing at its optimum. You can perform all maintenance procedures at once or as needed. Some parts may need to be replaced more than others depending upon your application and solvent preparation procedures.
Pump Routine Maintenance Procedures
| Solvent dripping out of waste outlet when valve closed |
Leak on pump head |
Exchange the purge valve frit or the purge valve |
| Pressure ripple unstable |
Dirty active inlet valve cartridge
Leak on pump head |
Run leak test for verification and exchange the active inlet valve cartridge
Run leak test for verification and exchange the outlet ball valve sieve or the complete valve |
| Gradient performance problems, intermittent pressure fluctuations |
Solvent filter is blocked |
Change the solvent filter |
| A pressure drop of >10 bar across the frit (5 mL/min H2O with purge valve open) indicates blockage |
Dirty frit |
Exchange the purge valve frit or the purge valve |
Leaks at lower pump head side
Unstable retention time
Pressure ripple unstable |
High seal wear |
Run leak test for verification and exchange the pump seals |
| Seal lifetime shorter than normally expected |
Scratch on plunger |
Check plungers while changing the seals |
| Loss of wash solvent |
Leaky wash seals |
Exchange the wash seals |