Graco 224–605 Owner's Manual page 18

WARNING
To reduce the risk of serious bodily injury, al-
ways follow the Pressure Relief Procedure
Warning on page 14 before checking or re-
pairing any part of the spray system.
NOTE: A circuit board (13b) is not included with
the new pressure control (18). However, it
is included with a new motor and it can be
ordered separately.
CAUTION
Do not allow the fittings (A) to move when
removing the elbow (90) or the tee (89) from
the pressure control to avoid altering the fac-
tory setting of the pressure control or perma-
nently damage the pressure control.
Circuit Board Removal
1. Remove the pressure control cover (7). Pull
the board (13b) out carefully, just far enough
to reach the wire terminals. Disconnect the
leads and remove the board. See Fig 16.
Pressure Control Removal
2. Disconnect the spray hose, the drain hose
(41) and the pump hose (26) at the pressure
control.
3. Disconnect the motor leads (black and
yellow/green). See Fig 16.
4. Remove the screws (88). See Fig 15.
5. Pull the pressure control (18) away from the
conduit (13f) while carefully guiding the leads
through the bushing (305), one at a time.
6. Remove the mounting bracket (70) and fittings
(96,90,30) and the filter (89). Install these parts
on the new pressure control.
Pressure Control Installation
7. Guide the motor leads into the new pressure
control.
8. Position the circuit board at 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 16.
PRESSURE CONTROL & CIRCUIT BOARD
11
89
94
95
41
Fig 15
13
13c
TRIAC
LEADS
WHITE
RED
WHITE
18
Fig 16
10. Mount the pressure control on the cart. Con-
nect the drain hose (41).
11. Adjust the pressure control. See page 19.
WARNING
Adjust the pressure control whenever a new
or used pressure control or circuit board is
installed to reduce the risk of overpressuriza-
tion which can result in component rupture,
fire or explosion. Improper adjustment may
also prevent the sprayer from obtaining the
maximum working pressure, resulting in poor
sprayer performance.
16
90
A
70
18
30
88
26
96
MOTOR
13f
LEADS
BLACK
GREEN & YELLOW
RED
PINK
BROWN
305
GREEN
BLACK
WHITE
POWER
SUPPLY
LEADS
7
13b
0749