Maintenance Of Circulation System - Hitachi PXR Service Manual

5 Maintenance of Circulation System

5.1 General Structure of Circulation System
5.1.1 The general structure of the circulation system is shown in the following figure.
Using an open/close type door (unit door) as a partition, the system is roughly
divided into an ink circulating area (the front side of the equipment) and a driving
part area (the rear side of the equipment).
Driving part area
Exhaust duct
Pump unit
Caution:
Since the circulation unit is made of plastic, tightening the screws with excessive
torque will break the unit. See the table below for reference torques:
Part name (used location)
Self-tapping screw M4X12
(attaching pressure system, etc.)
Self-tapping screw M4X16
(attaching solenoid valve)
Self-tapping screw M4X12
(attaching pump cover)
Self-tapping screw B M3X10
(attaching ICU joint)
Self-tapping screw 3X8
(attaching door lock body)
Self-tapping tow screw 4X12S
(attaching main tank, ink reservoir
and stirrer)
Ink circulating area
Companion Companion
parts name material
ICU base A PBT(G30)
ICU base B PBT(G30)
Front panel PP
ICU base B PBT(G30)
ADC12
P side plate
(aluminum)
ICU base A PBT(G30)
Door lock
POM
body
Main
connection POM
block, etc.
5-1
(PXR-P)
Unit door
Makeup ink
reservoir
Ink filter
Main ink tank
Ink reservoir
Reference tightening
torque
N·m kgf·cm
1.7±0.3 17.3±3
1.7±0.3 17.3±3
1.33±0.22 13.6±2.2
1.7±0.3 17.3±3
1.7±0.3 17.3±3
0.5±0.1 5.1±1
0.75 - 1.04 7.6 - 10.6
0.8±0.05 8.0±0.5