Graco 290/390 Paint Sprayer User Manual


 
Pressure Relief Procedure
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Pressure Relief Procedure
Follow the Pressure Relief Procedure whenever
you see this symbol.
1. Engage trigger lock.
2. Turn pressure control to lowest pressure.
3. Disengage trigger lock.
4. Hold a metal part of the gun firmly to a grounded
metal pail. Trigger the gun to relieve pressure.
5. Engage trigger lock.
6. Turn prime valve down. Have a waste container
ready to catch drainage. Leave prime valve in drain
position until you are ready to spray again.
7. Turn power switch OFF, if unit is being shut down or
will be left unattended.
If you suspect the spray tip or hose is clogged or that
pressure has not been fully relieved after following the
steps above, VERY SLOWLY loosen tip guard retaining
nut or hose end coupling to relieve pressure gradually,
then loosen completely. Clear hose or tip obstruction.
This equipment stays pressurized until pressure is
manually relieved. To help prevent serious injury
from pressurized fluid, such as skin injection,
splashing fluid and moving parts, follow the Pressure
Relief Procedure when you stop spraying and before
cleaning, checking, or servicing the equipment.
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