Trigger Lock - Graco NOVA 390 PC Operation, Parts

6. Put drain tube in a pail. Turn prime valve
down. Leave prime valve in down (drain)
position until you are ready to spray
again.
7. If you suspect the spray tip or hose is
clogged or that pressure has not been
fully relieved:
334567E
Pressure Relief Procedure
a.
b.
c.

Trigger Lock

Always engage the trigger lock when sprayer
is stopped to prevent the gun from being
triggered accidentally by hand or if dropped
or bumped.
ti24607a
VERY SLOWLY loosen the tip
guard retaining nut or the hose end
coupling to relieve pressure
gradually.
Loosen the nut or coupling
completely.
Clear hose or tip obstruction.
ti24612a
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