Manifold Replacement - Graco 390 Repair Manual

Manifold Replacement

See Wiring Diagram, page 27.
WARNING
Read Electric Shock Warning, page 3 and Pressure
Relief Procedure, page 7.
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.
310824C
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).
Manifold Replacement
23