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I
When to
Flush
1, New Sprayer. The sprayer was factory tested
in
light-
weight oil which was left in to protect pump parts.
Before using water-base paint, flush with mineral
spirits, then warm, soapywater, and then clean water.
Before usingoi/-basepaint, flushwith mineral spirits.
2. Changing Colors. Flush with a compatible solvent.
3. Changing from water-base to oil-base paint.
Flush with warm, soapy water, then mineral spirits.
5. Storage. Flush as indicated below, shut off the
sprayer, open the pressure drain valve to relieve
pressure and leave it open.
Water-base paint; flush with water, then mineral spir-
its. Leave the system filled with mineral spirits.
Oil-base paint: flush with mineral spirits
CAUTION
NEVER
allow water to freeze
in
the pressure control.
Doing sopreventsthe sprayerfrom being startedand
causes serious damage to the pressure
COfltrOi.
Push the water out with mineral spirits.
6.
Startup after storage. Before using water-base
4. Changing
from oil-base to water-base paint.
paint, flush out mineral spirits with soapy water and
Flush with mineral spirits, then warm, soapy water,
then clean water. When using oil-base paint, flushout
and then clean water.
the mineral spirits with the paint to be sprayed.
How to Flush
1. Relieve pressure.
2 . Remove the filter bowl and screen;
see
manual
307-273. Clean the screen separately and
install the
bowl without the screen to flush it. See
Fig
11-1.
PRESSURE
DRAIN VALVE
Fig 11 -1
3.
Close the pressure drain valve.
4.
Pour one-haif gallon of compatible solvent into a
grounded metal pail. Put the suction tube
in
the pail.
5. Remove the spray tip from the gun, if it is installed.
6. Turn the pressure adjusting knob all the way counter-
r - w A R N ' N G
1
clockwise to lower the pressure setting.
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 grounded metal pail.
7. Hold a metal part of the gun firmly against a metal
turn on the sprayer, and slowly increase the pressure
waste container. See
Fig
11-2.
Hold the trigger open,
til all air is forced out of the system and the solvent
just until the sprayer starts. Keep the gun triggered
un-
flowsfreeiy from the gun. Release the trigger and en-
gage the gun safety latch..
NOTE lfthe pump Is hard to prime, place
a
container un-
fluid comes from the valve, close it. Proceed as
der the pressure drain valve and open it. When
in Step 7.
8.
Remove the suction tube from
the
pail. Disengagethe
gun safety latch and 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 pressure.
9. Leave the pressure drain valve open until you are
ready to use the sprayer again.
If
the screen was re-
moved, unscrewthe filter bowl and reinstall the clean
screen. Reinstall the bowl, hand tight only.
IO.
If you flushed with mineral spirits and
are going to use
a water-base paint, flush with soapy water and then
clean water. Relieve pressure.
MAINTAIN FIRM'
,
CONTACT WHEN
METAL TO METAL
FLUSHING
Fig 11 -2
307-827
11
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