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125
Repairing the Pump
Exchanging the Multi-Channel Gradient Valve (MCGV)
5 Replace the MCGV cover. Reconnect the
waste funnel with the waste tube holder in
the top cover. Insert waste tube in the holder
in the waste pan and clip tube to the MCGV
cover.
6 Reconnect the tube from the active inlet valve
to the middle position of the MCGV and then
the solvent tubes at channel A to D of the
MCGV. Make sure the orientation of the
channels on the cover is labelled as shown
below, otherwhise re-label the cover.
Cover
Waste
funnel
Waste
tube
Cover
MCGV
Waste
funnel
Connecting tube MCGV to AIV
Solvent
tubes