Graco EM 390 Instructions And Parts List page 10

1. Prime the sprayer with paint.
a. Close the pressure drain valve. See Fig 10–2.
b. Don't install the spray tip yet!
c. Put the suction tube into the paint container. You
can hang the pail on the pail hanger. See Fig
10–2.
d. Turn the pressure adjusting knob all the way
counterclockwise to lower the pressure.
e. Disengage the trigger safety latch. See the detail
in Fig 10–2.
f. Hold a metal part of the gun firmly against a
grounded metal waste container. See Fig 10–1.
Hold the trigger open, turn the sprayer ON, and
slowly increase the pressure until the sprayer
starts. Keep the gun triggered until all air is forced
out of the system and the paint flows freely from
the gun. Release the trigger and engage the trig-
ger safety latch.
NOTE: If the pump is hard to prime, open the pressure
drain valve. When fluid comes through the drain
tube, close the drain valve. Disengage the trigger
safety latch and repeat Step 1.f.
g. Check all fluid connections for leaks; relieve pres-
sure before tightening connections.
PACKING NUT/WETCUP
PAIL HANGER
DRAIN TUBE
SUCTION TUBE
OPERATION
GROUND
WIRE
Fig 10–1
2. Install the spray tip and tip guard.
a. Be sure the trigger safety latch is engaged.
b. Install the spray tip. If using the RAC IV, refer to
manual 307–848, supplied with the gun, for in-
stallation instructions.
ON/OFF SWITCH
PRESSURE ADJUSTING KNOB
PRESSURE DRAIN VALVE
MAINTAIN FIRM
METAL-TO-METAL
CONTACT BETWEEN
GUN AND GROUNDED
METAL CONTAINER
DETAIL
TIP GUARD
SPRAY TIP
TRIGGER SAFETY LATCH
SHOWN ENGAGED (ON SAFE)
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