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Repairing the Pump
Exchanging the Multi-Channel Gradient Valve (MCGV)
1 Disconnect the connecting tube and the
solvent tubes from the MCGV, unclip them
from the tube clips and place them into the
solvent cabinet to avoid flow by hydrostatic
pressure. Unclip the waste tube from the
cover and remove the waste funnel from the
pump.
2 Press the lower sides of the cover to unclip it.
Remove the cover.
3 Disconnect the MCGV cable, unscrew the two
holding screws and remove the valve.
4 Place the new MCGV into position. Make sure
that the valve is positioned with the
A-channel at the bottom-right position.
Tighten the two holding screws and connect
the cable to its connector.
Waste
tube
Cover
MCGV
Waste
funnel
Connecting tube MCGV to AIV
Solvent
tubes
Cover
MCGV
cable
Holding
screws
MCGV
cable
Holding
screws
Channel A