REPLACING THE PRESSURE CONTROL & CIRCUIT BOARD
WARNING
To reduce the risk of serious bodily injury, including fluid injection or splashing in the eyes or on the skin, or injury from moving parts, always follow the Pres- sure Relief Procedure Warning on page 14 be- fore checking, adjusting, cleaning or shutting off the sprayer. Unplug the power supply cord.
NOTE: A circuit board (23f) is not included with a new pressure control (50). However, it is included with a new motor, and it can be ordered separately.
11.Adjust the pressure control. See page 22.
WARNING
Adjust the pressure control whenever a new or used pressure control or circuit board is installed, to re- duce the risk of overpressurization which can result in component rupture, fire or explosion. Improper adjustment may also prevent the sprayer from ob- taining the maximum working pressure, resulting in poor sprayer performance.
Be sure to order the correct circuit board. See the application information on page 24.
CAUTION
Do not allow the fittings (A) to move when removing the elbow (312) or nipple (313) from the pressure control, to avoid altering the factory setting of the pressure control or permanently damaging the pressure control.
Circuit Board Removal
1. Remove the pressure control cover (41). Pull the |
board (23f) out carefully, just enough to reach the wire |
terminals. Disconnect the leads. Remove the board. |
3
47
484
25
40
A50
312
302 
See Fig 21. |
Pressure Control Removal
2. Disconnect the hose (52) from the nipple (302). See |
Fig 20. |
52
Fig 20
313
7
3. | Disconnect the motor leads. See Fig 21. |
4. | Remove the screws (7), lockwashers (4), and nuts |
| (3). See Fig 20. |
5. | Pull the pressure control (50) away from the conduit |
| while carefully guiding the leads through the connec- |
| tor (303 ) one at a time. See Fig 21. |
6. | Remove the mounting bracket (40). Remvoe the fit- |
| tings (302, 312, and 313). Install these parts on the |
| new pressure control. See Fig 20. |
7. | Guide the motor leads into the new pressure control. |
Circuit Board Installation
8.Position the circuit board in the control so the wire connectors are at the top. Connect the leads to the board. Guide the leads into the pressure control, making sure they don't catch on anything. Slide the board into place.
Pressure Control Installation
9.Connect any other loose wires. See Fig 21.
10.Mount the pressure control on the frame.
23
MOTOR
BLACK 
LEADS
GREEN &
YELLOW
1RED
130 |
| PINK |
| BROWN | |
|
| |
TRIAC |
| 303 |
LEADS |
| 23c |
|
| |
WHITE |
| 23f |
|
| |
RED |
|
|
WHITE |
|
|
|
| GREEN |
|
| BLACK |
|
| WHITE |
| 50 | POWER SUPPLY |
| 41 | |
| CORD LEADS | |
|
|
Fig 21
