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307–758 15
FLUSHING GUIDELINES
NOTE: Several
flushes are often required to thoroughly clean the system and prepare it for the next fluid to be
sprayed, or to store the sprayer
. Use this chart to determine the required flushing order for the fluid you are
using, and then follow the procedure below for flushing.
*Use this category for flushing a brand new sprayer and flushing after storage.
System has
this fluid in it:
Next fluid to be
sprayed
Flushing order:
Before you spray or store
sprayer:
this fluid in it:
sprayed.
Flush 1 Flush 2 Flush 3
sprayer:
*Oil-based
solvent or paint
Oil-based paint –
new color
Mineral spirits
none none
Prime with oil-based paint
Oil-based
solvent or paint
W
ater-based paint
Mineral spirits
W
arm soapy
water
Clean water
Prime with water-based
paint
Oil-based
solvent or paint
Prepare for
storage
Mineral spirits
none none
Relieve pressure,
Leave drain valve open
Water or water-
based paint
W
ater-based paint
– new color
W
arm soapy
water
Clean water
none
Prime with water
Water or water-
based paint
Oil-based paint
W
arm soapy
water
Clean water
Mineral spirits
Prime with oil
Water or water-
based paint
Prepare for
storage
W
arm soapy
water
Clean water
Mineral spirits
Relieve pressure,
Leave drain valve open
NEVER allow water to freeze in the pressure
control. Doing so prevents the sprayer from being
started
and causes serious damage
to the pressure
control.
Pump the water out with mineral spirits.
CAUTION
0143
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
a grounded metal pail.
1. Follow
the illustrated
Pressure
Relief Procedure
on
page
4. Engage the gun safety latch.
2. Turn
the pressure adjusting knob fully
counterclock
-
wise
to the minimum pressure.
3. Remove
the spray tip from the gun. 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 15–1.
4.
Put the suction tube into a grounded metal pail with
1/2 gallon of compatible solvent.
5. Start
the sprayer
. See page 12. T
o save the fluid still
in the sprayer
, trigger the gun into another container
until
the next fluid appears, then trigger the gun back
into
the fluid you are pumping. Circulate the
flushing
fluid a couple of minutes to thoroughly clean the
system.
6. Do not run the pump dry for more than 30 seconds
to
avoid damaging the pump packings!
7. Follow
the illustrated
Pressure
Relief Procedure
on
page
4. Engage the gun safety latch.
8. Unscrew the filter bowl and reinstall the clean
screen. Install the bowl and hand
tighten.
Fig
15–1
PRESSURE
DRAIN
V
ALVE
FILTER
BOWL
SCREEN
FILTER
SUPPORT
01365