ICI ProSpray 404 Operations Manual & Parts List - Figure 11
19
PRESSURE CONTROL ASSEMBLY (Electrical Control Board)
1. Unplug machine's power cord.
2. Remove four screws (Item 27, Fig. 19) from pressure control assembly.
3. Disconnect all leads from pressure control assembly. (Fig. 10).
4. Reassemble in reverse order.
SENSOR
1. Remove the screws (Fig. 19, Item 27) and lower the pressure control assembly.
2. Disconnect swivel (Item 20, Fig. 19) from sensor (Item 21, Fig. 19) by holding sensor with 7/8" wrench and
loosening swivel with 11/16" wrench.
3. Disconnect sensor lead from the board. Carefully pull sensor lead out of the terminal box and remove sensor.
4. Reassemble in reverse order.
POTENTIOMETER (Pressure Control Assembly)
1. Lower pressure control assembly as described above.
2. Disconnect potentiometer lead from pressure control assembly.
3. Use a 1/16" allen wrench, loosen set screw in the potentiometer knob (Item 13, Fig. 10) and remove knob and
spacer. (Item 12, Fig. 10).
4. Using a 1/2" wrench or deep socket, remove the nut from the potentiometer shaft assembly.
5. Pull entire potentiometer assembly out of terminal box.
6. Replace in reverse order.
LIQUID CRYSTAL DISPLAY (LCD)
1. Lower pressure control assembly as described above.
2. Unscrew the four nuts (6/32") (Item 5, Fig. 11) and remove
LCD Display assembly (Item 6, Fig. 11).
3. If unable to loosen the four nuts, hold them and unscrew
the four screws (Item 1, Fig. 11). Then remove the
LCD Display Assembly. If the display is removed in this
manner, the mylar label (Item 2, Fig. 11) must be replaced.
4. Reassemble in reverse order, while making sure
that the four spacers (Item 4, Fig. 11) and the four
washers (Item 7, Fig. 11) are in place.
Tighten the four nuts handtight and seal with blue loctite.
DO NOT overtighten the nuts as this will damage the display.
ON-OFF TOGGLE SWITCH
1. Lower the pressure control assembly as described above.
2. Disconnect the two wires on the switch.
3. Use a 9/16" wrench to loosen the nut on the toggle switch shaft.
4. Reassemble in reverse order.
FUSE HOLDER
1. Lower pressure control assembly as described above.
2. Disconnect the two wires on the holder.
3. Remove holder cover and fuse.
4. Use 11/16" wrench to remove the nut from the holder shaft.
REPLACEMENT OF ELECTRICAL COMPONENTS
100-362
101-098
331-360
117-281
117-126
331-377
120-046
1
2
3
4
5
6
7
Screw (4)
Mylar Label - clear
Window
Spacer (4)
Nut (4)
Display Ass'y
Washer (4)
1
2
3
4
5
6
LCD DISPLAY
FIGURE 11
FIGURE 11 PARTS LIST
ITEM NO. PART NO. DESCRIPTION
7
NOTE: Anytime the pressure control assembly, sensor or both are replaced,
perform the four calibrations on pages 14-15.
WARNING: Always unplug the electrical cord before servicing machine.