1200 Series Quarternary Pump User Manual 77
Maintenance
7
Simple Repairs
Simple Repairs
The procedures described in this section can be done with the quaternary
pump in place in the system stack.
Tab le 11 Simple Repair Procedures
Procedure Typical Frequency Notes
“Checking and Cleaning the Solvent
Filter” on page 78
If solvent filter is blocked Gradient performance problems, intermittent
pressure fluctuations
“Exchanging the Active Inlet Valve” on
page 79
If internally leaking Pressure ripple unstable, run leak test for
verification
“Exchanging the Outlet Ball Valve” on
page 83
If internally leaking Pressure ripple unstable, run leak test for
verification
“Exchanging the Purge Valve Frit or the
Purge Valve” on page 85
If internally leaking Solvent dripping out of waste outlet when valve
closed
“Exchanging the Purge Valve Frit or the
Purge Valve” on page 85
If the frit shows indication
of contamination or
blockage
A pressure drop of > 10 bar across the frit
(5 ml/min H
2
O with purge open) indicates
blockage
“Exchanging the Pump Seals and Seal
Wear-in Procedure” on page 89
If pump performance
indicates seal wear
Leaks at lower pump head side, unstable
retention times, pressure ripple unstable — run
leak test for verification
“Exchanging the Plungers” on page 92 If scratched Seal life time shorter than normally
expected — check plungers while changing
the seals
“Installing the Seal Wash Option” on
page 94
If seals show indication of
leaks
Leaks at lower pump head side, loss of wash
solvent
“Exchanging the Optional Interface
Board” on page 103
If defective Error condition, indicated by red status
indicator
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