Hitachi IJ RX2 Service Manual page 170

６ Lift the MV9.
７ (1)Remove the nozzle-IN joint from
the MV9 filter then remove O-ring 3.9.
Fix a new MV9 filter and O-ring 3.9.
Perform the assembly after dipping the
O-ring in makeup, and confirm
that the O-ring does not
jump out of the hole.
(2)Attach each cover.
5-5
ＭＶ 9
MV9 filter
Nozzle-IN joint
O-ring 3.9