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12 308-125
Flushing
Guidelines
WARNING
To
reduce the risk of serious injury
, including fluid
injection, always follow the
Pressure Relief Proce
-
dure W
arning
on page 8 before checking, adjust
-
ing, cleaning, or shutting down the sprayer
.
When To Flush
1. Flush
a new sprayer
to remove the protective oil.
Before using water–base coating,
flush with a com-
patible solvent, then warm, soapy water, and then
clean
water
.
Before using oil–base coating,
flush with a compat-
ible
solvent.
2. Changing coatings.
Use a compatible solvent.
3. Changing from water–base to oil–base coating.
Flush
with warm, soapy water
, and then a
compatible
solvent.
4. Changing from oil–base to water–base coating.
Flush with a compatible solvent, then warm, soapy
water,
and then clean water
.
5. Storage.
Flush the pump only with a compatible solvent, fol-
lowed
by an oil–base solvent, such as mineral spirits.
Leave the drain valve open!
6.
Startup after storage.
Before
using water–base coating
,
flush out the com
-
patible
solvent with warm, soapy water
,
and then with
clean
water
.
When
using oil–based coating,
flush out the compat
-
ible
solvent with the coating to be sprayed.
How To Flush The Pump Only
1. Relieve pressure. Leave the drain valve open. See
Fig.
5.
2.
Disconnect the siphon assembly
.
3. Put the pump in a grounded metal pail of water or
compatible
solvent.
4. Start the sprayer – see page 10. Flush until the ball
in the foot valve is clean and moves up and down
easily.
How To Flush The Entire Fluid System
1. Relieve pressure. Leave the drain valve open. See
Fig.
5.
2. Put
the siphon tube in a grounded metal pail of water
or
compatible solvent.
3. Start the sprayer. Trigger the gun into the coating
container
just
until water or solvent comes from the
nozzle.
Release the trigger
.
4. Move the gun to the grounded flushing container.
Trigger the gun until clean water or solvent comes
from the it. See Fig. 6. Release the trigger and en-
gage
the safety latch. Open the drain valve to clean
it.
5. Check all fluid connections for leaks. Relieve pres-
sure before tightening any connections. Start the
sprayer.
Recheck the connections for leaks.
6. Remove
the siphon tube from the solvent pail.
Disen
-
gage the gun safety latch. Trigger the gun to force
water
or solvent from the hose. Do not let the pump
run
dry for more than 30 seconds to avoid damaging
the
pump packings! Relieve pressure.
PRESSURE
DRAIN
V
ALVE
shown in closed
position
0553
Fig.
5
Maintain
firm
metal-to-metal
contact
when
flushing to
reduce the chance of
static sparking and
splashing.
0406
Fig.
6