Pressure Control
WARNING
INJECTION HAZARD
To reduce the risk of serious bodily injury, follow the Pressure Relief Proce- dure Warning on page 11 before check-
ing or repairing any part of the spray system.
CAUTION
Do not remove the nipple (105e) or elbow (105d) from the pressure control unless they are damaged. Twisting or jarring the these fittings could alter the factory setting of the control or permanently damage it. If they must be removed, use extreme care. Hold the corresponding hex (B) steady with a wrench and then remove the part.
WARNING
All wires connected to the over±pressure switch (C) and the pressure switch (D) must be insulated at the terminals to reduce the risk of electric shock if someone touches these parts when the power is on. When installing the new pressure control, be sure the these terminals are covered with shrink tubing or electrical tape. See Fig. 20.
8.Remove the mounting screws (35) and pull the pressure control away from the sprayer.
See Fig. 19.
9.Remove the mounting plate (11) and secure it to the new pressure control. See Fig. 19.
10.Reassemble the new pressure control in the reverse order of disassembly.
11.Adjust the pressure control. See page 21.
CAUTION
Failure to observe the following precautions may cause poor performance or excessive pressure and permanent damage to the pressure control.
DAlways use at least 50 ft (15.2 m) of grounded, flexible spray hose.
DNever use a wire braid spray hose.
DNever add any type of shutoff device between the pump outlet and the spray gun.
DCheck the filter (if used) for clogging or incorrect assembly if tip clogging frequency increases.
DNever allow flushing water or water base paint to freeze in the system.
1.Disconnect the spray hose. Hold the nut (B) steady with a wrench and unscrew the filter (15).
2.Hold the elbow (105d) steady with a wrench and disconnect the hose (30). Disconnect the drain hose (80).
3.Remove the pressure control cover (21).
4.Disconnect the three power supply cord leads. See Fig. 20.
5.Disconnect the four motor leads. See Fig. 20.
6.Unscrew the conduit nut (103). See Fig. 19. Pull the pressure control away from the conduit while carefully guiding the wires through the connector.
7.Loosen the knurled part of the strain relief bushing (101) and unscrew the fitting from the pressure control. See Fig. 19.
34
33
B 15 
80
30
44
Fig. 19
11
35
23
21
101
70
103
105e
105d
01755A
19