Figure 19 Parts Of The Piston Cartridge - Metrohm 930 Compact IC Flex ChS/Deg Manual

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1 Piston cartridge screw
3 Zirconium oxide piston (6.2824.070)
5 Spring (6.2824.060)
7 Piston cartridge
930 Compact IC Flex ChS/Deg (2.930.1260)
The pump head has been removed (see "Removing the pump head",
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page 62).
The piston cartridge is removed (see "Replacing the piston seal", page
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65).
For this task, you need the following accessories:
Zirconium oxide piston (6.2824.070)
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Adjustable wrench (6.2621.000) from the accessory kit: Vario/Flex
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Basic (6.5000.000).
1 Breaking down the piston cartridge
CAUTION
Inside the piston cartridge there is a taut spring that can launch
out of the piston cartridge if the tension is released suddenly.
When opening the piston cartridge, counteract the pressure from
the spring and carefully unscrew the cartridge.
Loosen the piston cartridge's screw with an adjustable wrench
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and carefully unscrew the screw by hand while counteracting the
pressure from the taut spring.
Remove the zirconium oxide piston and place it on a paper towel.
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Remove the spring retainer, the spring and the inner plastic sleeve
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from the piston cartridge and lay them next to the piston.
Place the backup ring you put aside with the remaining parts.
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Figure 19 Parts of the piston cartridge
2 Retaining washer
4 Spring retainer
6 Inner plastic sleeve
Protects from metallic abrasion.
8 Backup ring
5 Operation and maintenance
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67