Pressure Control Assembly Replacement - Graco AIRLESSCO SP400 Hi Boy Repair Manual

Pressure Control Assembly Replacement

Pressure Control Assembly Replacement
See Wiring Diagram, page 28.
Removal
1. Relieve pressure, page 7. Disconnect power cord
from outlet.
2. Hi-Boy Models Only - Disconnect high-pressure
hose at pump outlet (see page 13).
3. Remove two screws (4) and shroud (12) (see illus-
tration, page 17).
4. Disconnect pressure switch connector (A) from con-
trol board (18). Pull bushing (23) from hole (K).
A
18
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5. Pull wires through hole (K).
6. Turn pressure control knob (17) counter clockwise
as far as you can to access flats on either side of
pressure control.
22
23
K
7. Loosen and unscrew pressure control.
NOTICE
If you plan to reuse pressure control, be careful not
to damage or tangle wires when unscrewing pres-
sure control.
8. Remove pressure control.
17
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3A1181B