138 Agilent InfinityLab LC Series 1260 Infinity II Isocratic- and Quaternary Pumps User Manual
8
Maintenance
Overview of Maintenance and Repair
Overview of Maintenance and Repair
The following pages describe maintenance (simple repairs) of the pump that
can be carried out without opening the main cover.
Table 2 0 Simple repair procedures
Procedure Typical Frequency Notes
“Checking and Replacing the Solvent
Filter” on page 141
If solvent filter is blocked Gradient performance problems, intermittent
pressure fluctuations
“Exchange the Passive Inlet Valve” on
page 142
If internally leaking Pressure ripple unstable, run Leak Rate Test
for verification
“Exchange the Active Inlet Valve (AIV) or its
Cartridge” on page 171
If internally leaking Pressure ripple unstable, run Leak Rate Test
for verification
“Exchange the Outlet Valve” on page 144 If internally leaking Pressure ripple unstable, run Leak Rate Test
for verification
“Exchange the Purge Valve Frit or the Purge
Valve” on page 146
If internally leaking Solvent dripping out of waste outlet when
valve closed
“Exchange the Purge Valve Frit or the Purge
Valve” on page 146
If the frit shows
indication of
contamination or
blockage
A pressure drop of > 10 bar across the frit (at
a water flow of 5 mL/min with open purge
valve) indicates blockage
“Maintenance of a Pump Head Without
Seal Wash Option” on page 155
If pump performance
indicates seal wear
Leaks at lower pump head side, unstable
retention times, pressure ripple unstable - run
Leak Rate Test for verification
Exchange pistons, see “Maintenance of a
Pump Head Without Seal Wash Option” on
page 155
If scratched Seal life time shorter than usual - check
pistons while changing the seals
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