Figure 20, Replacement of the piston seal 98, Ston – Metrohm 861 Advanced Compact IC User Manual
Page 84: Suddenly jumping out of the piston cartridge, The screw, Must be undone very carefully by hand, On 91, Al 98, Seals 98 the special tool 102 is, Screwed into the seal 98, which
4 Notes - Maintenance - Faults
861 Advanced Compact IC / Instructions for Use 8.861.1033
74
Figure 20: Replacement of the piston seal
40 Pump head (6.2824.100)
90 Screw (3.709.1100) for piston car-
91 Zirconium piston (6.2824.070) with
piston shaft
92 Spring retainer
93 Spring (6.2824.050) for main piston
or
Spring (6.2824.060) for auxiliary pis-
ton
94 Piston cartridge (4.709.0760)
95 Piston guide sleeve (4.709.4380)
96 Sapphire supporting ring
(6.2824.030)
97 Piston guide sleeve (4.709.4370)
99 Inlet valve (6.2824.090)
101 Screw holder for valve
102 Special tool (6.2617.010) to remove
103 Special tool (6.2617.010) to install
The seal surface in the pump head
must not be damaged (avoid
contact with tool)!
5 Cleaning/replacement of inlet valve 99 and outlet
valve 100
•
Contaminated or blocked valves are cleaned by rinsing with
dist. water, RBS solution or acetone. The rinsing effect can be
reinforced by brief treatment in an ultrasonic bath (max. 20 s;
if longer the sapphire sphere of the valve can be damaged).
•
If this does not have the desired effect, the valves can be dis-
assembled as shown in Figure 21. The valve components are
pushed out with the aid of a syringe needle inserted through
A
B
C
102
103
98
40
102
103
98