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FLUSHING GUIDELINES
How
to
Flush
1.
Follow the
Pressure Relief Procedure Warning
on
page
1
1.
2.
If
the sprayer has been used before, remove the filter
bowl and screen: see manual 307
-
273, supplied.
Clean the screen separately and install the bowl
without the screen to flush
it.
See
Fig
12-1.
FILTER
BOWL
DRAIN VALVE
PRESSUR*
Fig 12
-
1
3. Close the pressure drain valve.
4.
Pour
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,
if
it
is installed.
6.
Lower the pressure setting by turning the pressure
adjusting knob all the way counterclockwise.
7. Hold a metal part of the gun firmly against and aimed
into a metal wastecontainer.
SeeFig
12-2.
Squeeze
(
the trigger and hold
it
open, turn the
ON/OFF
switch
to
ON,
and slowly increase the pressure setting until
the sprayer starts. Keep the gun triggered until all air
is forced out
of
the system and the solvent flows
thegunsafetylatch.Thisprocedurehelpsreducethe
freely from the gun. Release the trigger and engage
risk of static sparking and splashing.
NOTE:
If the pump is hard to prime, place a container
under the pressure drain valve and open it.
When fluid comes from the valve, close it. Then
disengage the gun safety latch and proceed as in
Step 7, above.
8.
Remove the suction tube from the pail. Disengage
the gun safety latch and trigger the gun
to
force
sol
-
vent from the hose.
Do
not let the pump run dry for
packings! Then follow the
Pressure Relief Proce-
more than 30 seconds to avoid damaging the pump
dure Warning
on page
11.
9.
Leave the pressure drain valve open until you are
ready to use the sprayer again.
If
the screen was re
-
moved, unscrew the 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 fol
-
lowed by a clean water flush. Then follow the
Pres
-
sure Relief Procedure Warning
on page
11.
i
Fig
12
-
2
12
307-670
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