Hitachi UX Twin Nozzle Service Manual page 223

５ Remove the fixing screws (2 locations)
and remove the coupling cover.
６ Remove MGV holder and
Nozzle-IN Joint holder.
７ Take up the shutoff valves (MV9/MV29), remove
the Makeup IN joint and the shutoff valves (MV9/MV29).
When the O-ring (P2.2) is remained in the
heating unit, remove it.
８ (1) Put the MGV filter, O-ring 3.9, O-ring 2.2 and O-ring 1.7 into the respective holes
of the joint parts of new MV9/MV29.
Perform the assembly after dipping the O-ring in makeup and
confirm that the O-ring does not jump out of the hole.
Makeup IN joint
O-ring 1.7
MGV holder
O-ring 2.2
5-7
MGV filter
Boss on the heating unit
Fixing screws
Coupling cover
Nozzle-IN joint holder
MV9, MV29
Nozzle-IN-joint
O-ring 3.9