FLUSHING GUIDELINES
When To Flush .
1. Before using your new sprayer. Your new EM 480
was factory tested in No. 10 motor oil and the oil was
left in it to protect the parts.
Before using water-based paint: Flush out the oil
with mineral spirits, then flush out the mineral spirits
with soapy water followed by a clean water rinse.
Before using
o&based
paint: Flush out the oil with
mineral spirits only.
2. Whenever you change the color of your paint
supply. Flush with a compatible solvent such as
mineral spirits or water.
3. Whenever you change from water-based to oil-
based paint. Flush with soapy water, then mineral
spirits.
4. Whenever you change from oil-based to water-
based paint. Flush with mineral spirits, then soapy
water, followed by a clean water rinse.
5.
Before you store your sprayer.
When using water-based paint: Flush with water,
then mineral spirits and leave the pump, hose, and
gun filled with mineral spirits.
When using o&based paint: Flush with mineral
spirits and leave the pump, hose, and gun filled with
mineral spirits.
6. Before you use your sprayer after storage.
Before using water-based paint: Flush out mineral
spirits with soapy water followed by a clean water
rinse.
Before using o&based paint: Flush the mineral spirits
out and the unit is ready to use.
How To Flush
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1. Follow the Pressure Relief Procedure Warning on
page 2, then remove the spray tip.
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WARNING
To reduce the risk of an injection injury, always
remove the spray tip from the gun before flushing.
2. Remove the filter bowl and screen. See manual
307-273, supplied. If the bowl is tight, remove the
filter assembly from the sprayer first. Install the
bowl on the filter without the screen. Clean the
screen separately.
CAUTION
Using excessive force to remove the filter bowl
while still on the sprayer could rotate the pressure
control fittings and damage the bourdon tube.
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3.
Pour
l/2
gallon (2 liters) of compatible solvent (see
“When to Flush”) into a bare metal pail. Put the
pump suction tube in the pail.
4. Be sure the pressure control knob is set at
minimum, then disengage the gun safety latch.
When you are flushing or relieving pressure,
ALWAYS hold a metal part of the gun firmly to a
the risk of static sparking, which can cause fire or
5.
Point the spray gun into the metal pail, squeeze the
trigger, turn the sprayer to ON, and slowly turn the
pressure control setting clockwise just until the
sprayer starts.
Always use the lowest possible
pressure.
6.
Keep the gun triggered until clean solvent comes
from the nozzle. Release the trigger. Then open the
filter drain valve, which is connected to a drain
valve, and flush again to remove paint from the
drain tube.
7. Release the trigger and engage the gun safety
latch. Close the drain valve.
Fig
8.
9.
10.
11.
12.
2
Check all fluid connections for leaks. If there are
any leaks, follow the Pressure Relief Procedure
Warning, above,
then tighten the connections.
Start the sprayer again and check to be sure the
leaking has stopped.
Remove the suction tube from the pail. Disengage
the gun safety latch and trigger the gun into a metal
pail to force solvent from the hose. Do not let the
pump run dry for more than 30 seconds to avoid
damaging the pump packings!
Engage the gun safety latch, turn the sprayer to
OFF, and unplug the sprayer. Open the drain valve.
Unscrew the filter bowl (F) and reinstall the screen
(G) so the stud of the filter support (H) protrudes
through the end of the screen. Install the spring (E)
on the stud, and reinstall the bowl, hand tight only.
Be careful not to rotate or jar the pressure control
fittings.
If you flushed with mineral spirits and are going to
use a water-based paint, you must flush again with
soapy water, followed by a clean water rinse.
307460 9
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