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Graco 390 Repair Manual

Graco 390
30 pages
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Manifold Replacement
310824C 23
Manifold Replacement
See Wiring Diagram, page 27.
Removal
1. Relieve pressure, page 7. Disconnect power cord
from outlet.
2. Remove drain line (40) and barbed fitting (20) from
manifold. See Drain Line Replacement, page 24.
3. Remove two screws (30) and shroud (29).
4. Disconnect fluid hose at pump outlet.
5. Disconnect pressure switch connector (A) from con-
trol board (33).
6. Remove tape (22) holding wires to manifold.
7. Pull wires back through hole (K) in housing.
8. If required, remove pressure switch from manifold.
See Pressure Control Assembly Replacement,
page 22.
9. Remove two screws (6) to disconnect Manifold from
housing.
Installation
1. Position manifold on sprayer frame.
2. Replace screws (6) and torque to 150 in-lbs (17
N.m).
3. If removed, install pressure control assembly. See
Pressure Control Assembly Replacement, page
22.
4. Feed pressure switch wires through hole in housing
(K).
5. Insert grommet (21) in hole (K) in housing. Secure
wires to manifold housing with tape (22).
6. Reconnect pressure switch connector (A) to control
board (33).
7. Reconnect fluid hose at pump outlet.
8. Replace barbed fitting (20) and drain line (40). See
Drain Line Replacement, page 24.
9. Install shroud (29) and two screws (30).
WARNING
Read Electric Shock Warning, page 3 and Pressure
Relief Procedure, page 7.
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Graco 390 Specifications

General IconGeneral
Max Pressure3300 PSI
Flow Rate0.47 GPM
Weight30 lbs
Power SourceElectric
TypeAirless
Hose Length50 ft
Voltage120V
Horsepower0.625 HP

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