Figure 25 Pump Head - Removing The Piston - Metrohm 882 Compact IC plus Manual

5.5 High pressure pump
1 Pump head
58 ￭￭￭￭￭￭￭￭
Cleaning/replacing the zirconium oxide piston
Clean one piston after the other as follows:
1 Removing the piston cartridge from the pump head
Loosen the piston cartridge with a wrench and unscrew from the
pump head by hand.
Figure 25 Pump head – removing the piston
2 Dismantling the piston
Caution
On the inside of the piston cartridge there is a taut spring than can
jump out of the piston cartridge if suddenly loosing tension.
When opening the piston cartridge, hold pressure towards the
spring and unscrew carefully.
Loosen the screw of the piston cartridge with a wrench and
￭
unscrew carefully by hand and by holding pressure towards the
taut spring.
Remove the zirconium oxide piston and lay on a tissue.
￭
Remove the spring retainer, spring and the inner plastic sleeve
￭
from the piston cartridge and lay by.
1
2
2 Piston cartridge
￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
882 Compact IC plus – Anion