Graco Pro 455 Repair Manual page 13

On/Off Switch Replacement
100 Vac (232923, 232943 – 232945, 233033)
Removal
1.
Relieve pressure; page 4.
2. Fig. 8. Remove four screws (18) and pressure
control cover (39).
3. Remove display connector (B) from plug (C)
4. Disconnect four wires (A) from ON/OFF
switch (23).
5. Remove toggle boot (25) and locking ring (24).
Remove ON/OFF switch (23).
25
24
23
39
18
ON/OFF
Switch
Blue
TP2
Ref 29
Power
Plug
TP1
Brown
Fig. 8
100 Vac
37
35
A
36
B
D
52
Wiring Diagram
Ref 23
Brown
Ref 34
Red (+)
Yellow
from Motor
Black(–)
Green/
Yellow
Filter Board
Installation
1. Install new ON/OFF switch (23). Install locking ring
(24) and toggle boot (25).
2. Connect four wires (A) to ON/OFF switch (23).
3. Install display connector (B) in plug (C)
4. Install pressure control cover (39) with four
screws (18).
C
E
Heat from inductor coil of filter board may destroy
Blue
wire insulation that comes in contact with it.
Exposed wires could cause shorts and compo-
nent damage. Bundle and tie all loose wires so
none lay in contact with inductor coil of filter
L2 L1
board.
Blue
Inductor Coil
CAUTION
Digital Display
Ref 52
Pressure Transducer
Ref 26
Potentiometer
Brown
9596A
309056
9584A
13