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Repairing the Pump
Exchanging the Multi-Channel Gradient Valve (MCGV)
Exchanging the Multi-Channel Gradient
Valve (MCGV)
NOTE The lifetime of the multi-channel gradient valve can be maintained by
regularly flushing the valve, especially when using buffer solutions. If using
buffer solutions, flush all channels of the valve with water to prevent
precipitation of the buffer. Salt crystals can be forced into an unused channel
and form plugs that may lead to leaks of that channel. Such leaks will interfere
with the general performance of the valve
When using buffer solutions and organic solvents in the Agilent 1100
Quaternary Pump it is recommended to connect the buffer solution to one of
the bottom ports and the organic solvent to one of the upper gradient valve
ports. It is best to have the organic channel directly above the salt solution
channel (e.g., A - salt solution, B - organic solvent).
Parts required MCGV (exchange assembly, G1311-69701)
Tools required Pozidriv #1
Preparations for this
procedure
Switch the quaternary pump off at the power switch.
Remove the front cover to have access to the pump mechanics.