29 of, Ston, Suddenly jumping out of the piston cartridge – Metrohm 818 IC Pump User Manual
Page 33: The screw, Must be undone very carefully by hand, Al 34, On seals 34 the special tool 38 is, D into the seal 34, Seal
4.2 Maintenance and servicing
818 IC Pump / 8.818.1023 Instructions for Use
27
8 Pump head 6.2824.100
for piston cartridge 30.
27 Piston with piston shaft (6.2824.070
zircon piston or 6.2824.000 sapphire
piston)
28 Spring retainer
29 Spring (6.2824.050) (for main piston)
or
Spring (6.2824.060) (for auxiliary
piston)
30 Piston cartridge (4.709.0760)
31 Piston guide sleeve (4.709.4380)
32 Sapphire supporting ring
(
)
(6.2824.030)
33 Piston guide sleeve (4.709.4370)
34 Piston seal 6.2741.020
35 Inlet valve (6.2824.090)
38 Special tool (6.2617.010) to remove
the piston seal 34.
39 Special tool (6.2617.010) to install
the piston seal 34.
To install a new piston seal 34 the special tool 39 is used:
•
First the new seal is inserted firmly in the recess of tool 39 by
hand (see Fig. 9B). The seal spring must be located on the
outside.
•
The tool 39 together with the seal is then inserted in the pump
head 8 and the seal pressed into the pump head recess with
the aid of tool 38 (see Fig. 9C).
The seal surface in the pump head
must not be damaged (avoid
contact with tool)!