beautypg.com

Metrohm 930 Compact IC Flex Oven/SeS/PP User Manual

Page 78

background image

5.7 Servicing the high-pressure pump

■■■■■■■■■■■■■■■■■■■■■■

70

■■■■■■■■

930 Compact IC Flex Oven/SeS/PP (2.930.2500)

Has the pressure dissipated?

Is the instrument switched off?

1 Release the coupling from the pressure screw and seal it with a stop-

per.

2 Unscrew and remove the pressure screw on the pump head's output

(17-8).

3 Unscrew and remove the four fastening screws (17-3) using the hex

key.

4 Remove the pump head (17-4).

Replacing the piston seal
Carry out the following work on both pistons in turn.

Servicing a piston consists of the following tasks:

1.

Replace the piston seal.

2.

Optional: Clean or replace the zirconium oxide piston.

3.

Reinstall the piston.