Pressure Relief Procedure; Applicator (Base Coat Pump); Spray Gun (Top Coat Pump) - Graco 257369 Repair Manual

Pressure Relief Procedure

Applicator (Base Coat Pump)

Follow the Pressure Relief Procedure whenever
you see this symbol.
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.
1. Turn engine OFF.
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2. Turn on/off switch OFF and turn pressure control
knob fully counterclockwise.
3. Pull gun trigger to release pressure.
4. Turn prime/drain valve down to DRAIN position.
Fluid from drain valve can splash in eyes or skin and
cause serious injury. Keep hands clear of pressure
relief valve and always wear safety glasses.
NOTE: If you suspect spray tip nozzle or hose is com-
pletely clogged or that pressure has not been fully
relieved after following the previous steps, cover the
connection at end of hose with a heavy rag and very
slowly loosen connection.
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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.
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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.
Pressure Relief Procedure
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