Replacement Of Electrical Components; Screw; Nut - AIRLESSCO LP460 Service & Operation Manual

REPLACEMENT OF ELECTRICAL COMPONENTS

NOTE: Anytime the pressure control assembly, sensor or both are replaced, perform the calibrations.
PRESSURE CONTROL ASSEMBLY (Electrical Control Board)
1. Unplug machine's power cord.
2. Remove four screws (Fig. 15, Item 20) from pressure control assembly.
3. Disconnect all leads from pressure control assembly.
4. Reassemble in reverse order.
SENSOR
1. Remove the screws (Fig. 15, Item 20) and lower the pressure control assembly.
2. Disconnect swivel (Fig. 15, Item 13) from sensor (Fig. 15, Item 14) 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
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 (Fig. 22, Item 13) and remove knob and
spacer (Fig. 22, Item 12).
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") (Fig. 23, Item 5) and remove
LCD Display assembly (Fig. 23, Item 6).
3. If unable to loosen the four nuts, hold them and unscrew
the four screws (Fig. 23, Item 1). Then remove the
LCD Display Assembly. If the display is removed in this
manner, the mylar label (Fig. 23, Item 2) must be replaced.
4. Reassemble in reverse order, while making sure
that the four spacers (Fig. 23, Item 4) and the four
washers (Fig. 23, Item 7) 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.
5. Reassemble in reverse order.
32
Always unplug the electrical cord before servicing machine.
FIGURE 24
FIGURE 24 PARTS LIST
ITEM # PART # DESCRIPTION

Screw (4)

1 100-362
Mylar Label - clear
2 101-270
Window
3 331-360
Spacer (4)
4 117-281

Nut (4)

5 117-126
Display Ass'y
6 331-377
Washer (4)
7 120-046