Graco Contractor King 279005 Instructions Manual page 14

Flush
e. When clean solvent flows from drain tube close
fluid drain/purge valve (J) by rotating clockwise.
Pump will stall.
f. Stop the pump with the rod buried in the pump.
g. Turn the air regulator adjustment knob (G)
counterclockwise until air pressure gauge (E)
reads zero.
h. Close bleed type master air valve (B).
10. Perform Pressure Relief Procedure, page 10.
11. If equipped, remove fluid filter and soak in solvent.
Replace filter cap.
14 3A9121A