F
Service / Repair
NEPTUNE 1&2_EN_Ver.2.1_45/2014 77
Pressure regulation - Maintenance
Fig.F.26: Pressure regulation - Cut away
The pressure valves on 1 ~ and 3 ~ versions
are identical.
Using a 22 mm wrench unscrew the pressure
valve as a whole.
Take out the valve seat by means of e.g. an
impact piercer (Fig.F.46.
Fig.F.28: Control piston– Dismount
Lift up the lid for pressure regulation.
Loosen the screw inside.
Demount the regulation valve.
Demount the connector.
Remove the Start/Stop switch from the
connector.
Unscrew the union nut using a 17 mm
socket.
Control piston – Maintenance
Fig.F.25: Pressure regulation - Dismount.
Fig.F.27: Puller—Impact piercer.
Neptune 2