Graco 17С327 Operation, Parts page 14

Pressure Relief Procedure
6. Turn the prime valve down. Put drain
tube in a pail. Leave prime valve in the
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:
a. VERY SLOWLY loosen the tip
guard retaining nut or the hose end
coupling to relieve pressure
gradually.
b. Loosen the nut or coupling
completely.
c. Clear hose or tip obstruction.
14
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.
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