21
Pressure gauge shows little pressure, the water from the nozzle
comes in squirts: Most likely the valves are soiled.
The pressure gauge shows little pressure
despite fully turned up pressure regulation.
The water from the lance comes in squirts.
The HP hose vibrates.
(Inside the pressure gauge is no water but
a filling with glycol to damp the vibration of
the pointer.)
Proceeding:
Unscrew all 6 valves, one after the other
(hexagonal brass screws, 3 in a row,
vertically and horizontally)
Take out valve body (with green or red
plastic coating) and O-ring by means
of needle nose pliers.
Check O-ring for damage. In case of a
damage the O-ring has to be replaced.
Take a wire and clean valves under
running water.
Do not forget the O-ring during
reassembly!
Summary of Contents for 122 Silent
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