How To Flush - Graco EM 390 Instructions And Parts List

1. Relieve pressure. See page 16.
2. Remove the filter bowl and screen; see instruction
manual 307–273, supplied. Clean the screen sepa-
rately and install the bowl (only) to flush it. See Fig
14–1.
3. Close the pressure drain valve.
4. Pour one–half gallon (2 liters) of compatible solvent
into a grounded metal pail. Put the suction tube in the
pail.
5. Remove the spray tip from the gun.
WARNING
To reduce the risk of static sparking and splashing
when flushing, always remove the spray tip from
the gun, and hold a metal part of the gun firmly to
the side of, and aimed into, a grounded metal pail
6. Disengage the trigger safety latch. Point the gun into
a grounded metal waste container. With metal part of
the gun firmly touching the metal container, squeeze
the gun trigger. See Fig 14–2. This procedure re-
duces the risk of static sparking and splashing. Start
the sprayer, trigger the gun, and slowly turn the pres-
sure adjusting knob clockwise just until the pump
starts. Keep the gun triggered until clean solvent
comes from the nozzle. Release the trigger and en-
gage the trigger safety latch.
7. Check all fluid connections for leaks. If any connec-
tions leak, first relieve the pressure. Tighten the con-
nections. Start the sprayer. Recheck the connections
for leaks.
8. Remove the suction tube from the pail. Disengage the
trigger safety latch. Trigger the gun to force solvent
from the hose. Do not run the pump dry for more
than 30 seconds to avoid damaging the pump
packings ! Relieve the pressure.
9. Unscrew the filter bowl and reinstall the clean screen.
Reinstall the bowl, hand tight only.

HOW TO FLUSH

10. Remove the suction tube assembly and clean it sepa-
rately. Flushing alone may not thoroughly clean these
parts.
11. If you flushed with mineral spirits and are going to im-
mediately use a water-base paint, flush with soapy
water followed by a clean water flush. If you are stor-
ing the sprayer, leave the mineral spirits in it. Relieve
pressure.
12. Leave the pressure drain valve open until you are
ready to use the sprayer again.
Fig 14–1
GROUND
WIRE
Fig 14–2
SCREEN
FILTER
BOWL
FILTER
SUPPORT
MAINTAIN FIRM
METAL-TO-METAL
CONTACT BETWEEN
GUN AND GROUNDED
METAL CONTAINER
PRESSURE
DRAIN VALVE
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0664