Spray Gun (Top Coat Pump) - Graco 278675 Operation

Spray Gun (Top Coat Pump)

1. Lock gun trigger safety and turn engine OFF.
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2. Turn on/off switch to OFF and turn pressure control
knob fully counterclockwise.
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3. Unlock trigger safety. Hold metal part of gun firmly
to side of grounded metal pail and trigger gun to
relieve pressure.
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4. Lock gun trigger safety. Open pressure prime/drain
valve. Leave valve open until ready to spray again.
NOTE: If you suspect that the spray tip nozzle or hose is
completely clogged, or that pressure has not been fully
relieved after following the previous steps, VERY
SLOWLY loosen the tip guard retaining nut or hose end
coupling to relieve pressure gradually, then loosen com-
pletely. Then clear tip or hose.
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Pressure Relief Procedure
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June 2019