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Operation
Shutdown and Care of the Pump
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 7.
Never allow paint to dry in the pump and lines.
To shutdown the system
1. Relieve the pressure. Stop the agitator, and
lubricate it.
2. If using a Graco fluid pressure regulator at the
gun, reverse its regulating key and thread it into
the regulator cap as far as it will go.
3. Loosen the spray gun air cap about three turns,
hold a rag over the front of the air cap and fully
trigger the gun. This forces paint in the gun, hose
and regulator back into the circulating line. Close
the fluid shutoff valves (C) at that gun station,
Repeat for the other gun stations.
4. Open the bleed–type master air valve (N), and the
pump air regulator (204) to restart the pump.
Circulate the paint to remove all trapped air before
shutting down.
5. Disconnect the gun’s fluid hose from the gun and
the fluid regulator. Plug the regulator outlet. Blow
compressed air and compatible solvent through
the hose to clean it. Clean the gun according to the
instructions supplied with it. Each month remove
and clean the fluid regulator.
6. If you are not using an air line lubricator, manually
lubricate the motor at least once a day.
7. Circulate the fluid in the lines often enough during
the shutdown to prevent the paint from drying.
NOTE: To drain the circulating lines and flush the
system, see Flushing on page 7.