4.6 Servicing the high-pressure pump
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883 Basic IC plus
1
Release the coupling from the pressure screw and seal it with a stop-
per.
2
Unscrew and remove the pressure screw on the pump head's outlet
(18-8).
3
Loosen and remove the four fastening screws (18-3) using the hex
key.
4
Remove the pump head (18-4).
Servicing the piston
Carry out the following work on both pistons in turn.
Servicing a piston consists of the following tasks:
1. Replace the piston seal.
2. Clean or replace the zirconium oxide piston.
3. Reinstall the piston.
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