Filter
Top Products
307-735
12
FLUSHING GUIDELINES
NOTE: The
Pressure Relief Procedure W
arning
is on
page
14.
When To Flush
CAUTION
NEVER leave water in the sprayer if there is the
slightest
change it could freeze. Flush out the
water
with
mineral spirits. If water freezes in the pressure
control tube, it prevents the sprayer from being
started, and causes serious damage to the pres-
sure
control.
1. New
Sprayer
.
The sprayer
was factory tested in light
-
weight
oil,which was left in to protect the pump
parts.
Before using water-base paint,
flush with mineral
spirits, followed by a soapy water flush, and then a
clean
water flush.
Before
using oil-base paint,
flush with mineral spir
-
its,
only
.
2. Changing Colors. Flush with a compatible solvent
such
as mineral spirits or water
.
3. Changing from water-base to oil-base paint.
Flush
with warm, soapy water
, then mineral spirits.
4. Changing
from oil-base
to water-base paint.
Flush
with mineral spirits, followed by warm, soapy water,
and
then a clean water flush.
5. Storage.
Water-base
paint:
Flush with water
,
and then miner
-
al spirits. Leave the pump, hose and gun filled with
mineral spirits. Shut off the sprayer and open the
pressure
drain valve to relieve pressure.
Oil-base paint:
Flush with mineral spirits. Shut off
and
unplug the sprayer
,
open the pressure drain valve
to
relieve pressure.
6.
Startup after storage.
Before
using water-base paint
,
flush out the miner
-
al
spirits with soapy water
, and then with clean
water
.
When using oil-based paint,
flush out the mineral
spirits
with the paint to be sprayed.
How To Flush
1. Relieve
pressure.
2. Remove the filter bowl and screen; see instruction
manual 307–273, supplied. Clean the screen sepa-
rately
and install the bowl, without the screen, to flush
the
bowl.
See Fig 7.
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 gun safety latch. Point the gun into a
metal
w
ast
e c
ontainer.
W
it
h m
eta
l p
ar
t o
f t
h
e g
u
n f
irmly
touching
t
h
e m
eta
l c
ontainer
, s
queeze
t
h
e g
u
n t
rigger.
See Fig 8
. This procedure reduces the risk of static
sparking and splashing. Start the sprayer, trigger the
gun,
a
n
d s
lowl
y t
ur
n t
h
e p
ressur
e a
djustin
g k
no
b c
lock-
wise
j
us
t u
nti
l t
h
e p
um
p s
tarts
. K
ee
p t
h
e g
u
n t
riggered
until
c
lea
n s
olven
t c
ome
s f
ro
m t
h
e n
ozzle
. R
eleas
e t
he
trigger
a
n
d e
ngag
e t
h
e g
u
n s
afet
y l
atch.
7. Check all fluid connections for leaks. If any connec-
tions
leak, first relieve pressure. T
ighten the connec
-
tions.
Start the sprayer
. Recheck the connections for
leaks.
8. Remove
the suction tube from the pail. Disengage the
gun
safety latch. T
rigger 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! Re
-
lieve pressure.
9. Leave the pressure drain valve open until you are
ready to use the sprayer again. Unscrew the filter
bowl and reinstall the clean screen. Reinstall the
bowl,
hand tight only
.
10. If
you flushed with mineral spirits and are
going to use
a
water-base paint, flush with soapy water followed
by
a
clean water flush. Relieve pressure.
Fig 8
MAINTAIN
FIRM
METAL-TO-METAL
CONT
ACT BETWEEN
GUN AND GROUNDED
MET
AL CONT
AINER
GROUND
WIRE
FILTER
SUPPORT
Fig
7
SCREEN
FILTER
BOWL
PRESSURE
DRAIN
V
ALVE