Agilent Technologies G4782A, User Manual

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110 1260 SFC Binary Pump
8
Maintenance
Maintenance of a Pump Head with Seal Wash
Maintenance of a Pump Head with Seal Wash
When In case of maintenance or pump head internal leaks
Tools required p/n Description
8710-2411 Hex key 3 mm12 cm long
8710-2392 Hex key 4 mm15 cm long T-handle
01018-23702 Insert tool
Screwdriver, small flat head
Parts required p/n Description
0905-1718 Wash seal (PTFE)
5062-2484 Gasket, seal wash (pack of 6)
5067-4695 Sapphire piston
0905-1719 PE Seal
Preparations • Switch off the pump at the main power switch.
• Open the doors of the module.
• Use an optional solvent shutoff valve or lift up solvent filters for avoiding leakages.
• Remove the Pump Head Assembly.
• Remove the wash solvent tubings from the support ring inlet and outlet.
1
Place the pump head on a flat surface. Loosen the lock
screw (two turns).
2
While holding the lower half of the assembly (piston
housing), carefully pull the pump housing away from the
piston housing.