User manual

146 1260 Nanoflow Pump User Manual

9 Maintenance

Removing and Disassembling the Pump Head

When • Exchanging pump seals

• Exchanging pistons

• Exchanging seals of the seal wash option

Tools required Wrench 1/4 inch

3-mm hexagonal key

4-mm hexagonal key

Preparations • Switch off pump at power switch

• Remove the front cover to have access to the pump mechanics

CAUTION

Damage of the pump drive

Starting the pump when the pump head is removed may damage the pump drive.

➔ Never start the pump when the pump head is removed.

1 Disconnect the capillary at the pumphead adapter and the

tube at the active inlet valve. Beware of leaking solvents.

Disconnect the active inlet valve cable plug.

2 Using a 4-mm hexagonal key step wise loosen and

remove the two pump head screws and remove the pump

head from the pump drive.

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