Metrohm 807 Dosing Unit - Manual (Page 34)

3.8 Assembling the dosing unit
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807 Dosing Unit
3.8 Assembling the dosing unit
CAUTION
Dosing cylinders and pistons, and in particular their sealing lips, should
not be permitted to become damaged during assembly.
3.8.1 Inserting the dosing piston
Inserting the dosing piston
Figure 19 Inserting the dosing piston
Insert the dosing piston as follows:
1 Place the dosing piston horizontally on the cylinder.
2 Carefully press the dosing piston inward by approximately 1-2 mm.
Fitting the stoppers
Fit the stoppers as follows:
1 Place the centering tube over the dosing cylinder.
2 Fit the narrow and the wider guide blades on the lower edge of the
centering tube into the corresponding recesses of the cylinder base.