114 Agilent 1200 Preparative Pump User Manual
7 Maintenance
Simple Repairs
Simple Repairs
The procedures described in this section can be done with the preparative
pump in place in the system stack.
Tabl e 13 Simple Repair Procedures
Procedure Symptom Potential causes
“Removing an Inlet Ball Valve (Bottom of the
Pump Head)” on page 117
If leaking or not
opening/closing properly
External/internal leak. Pressure ripple unstable,
run leak test for verification
“Exchanging the Filter Cup” on page 120 Excessive back pressure
with open EMPV,
unstable pressure
After replacing pump seals,
contaminated filter
“Exchanging the Filter Frit” on page 122 Excessive back pressure
with open EMPV,
unstable pressure
After replacing filter cup,
particles on filter frit
“Exchanging the Seal Wash Pump
Cartridge” on page 125
Seal wash pump not
delivering flow
Seal wash pump leaking
If mechanically defect
“Removing and Disassembling the Pump
Head Assembly” on page 126
Leaks, unstable flow or
pressure
If seal life time is shorter than normally
expected — check plungers for scratches while
changing the seals
“Reassembling the Pump Head
Assembly” on page 129
After pumphead repair
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