Hitachi UX Twin Nozzle Service Manual page 163

5 Holding the drive unit by hand, remove the fixing screw (6 pieces), and remove
.
the drive unit
Drive unit
Pump unit
Fixing screws
Fixing screws
6 Remove the Drive unit from the Pump unit.
[Caution] When the Drive unit is removed, the springs on the Pump head (4 pieces)
are freed causing the internal parts (diaphragms) elongated. To avoid this, put the Drive
unit back to its place approximately within 60 minutes.
Drive unit
7 Attach the new Drive unit in reverse order.
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