Graco GM3500 SPRAYER 231-078 Instructions And Parts List page 12

FLUSHING GUIDELINES
How to Flush
1. Follow the Pressure Relief Procedure Warning on 6. Disengage the gun safety latch. Point the spray gun
page 1 1. into a metal waste container and with a metal part of
the gun firmly touching the metal container, squeeze
the gun trigger. See Fig 12-2. This procedure helps
reduce the risk of static sparking and splashing. Start
the sprayer, trigger the gun and slowly turn the pres-
sure adjusting knob clockwise just until the pump
starts. Keep the gun triggered until clean solvent
comes from the nozzle. Release the trigger and en-
gage the gun safety latch.
2. 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
SCREEN
'
FILTER
SUPPORT
PRESSURE
DRAIN VALVE
Fig 12-1
7. Check all fluid connections for leaks. If anyJeak, first
follow the Pressure Relief Procedure Warning on
page 11. Now tighten the connections, start the
sprayer, and recheck the connections for leaks.
8.
Remove the suction tube from the pail. Disengage
the gun safety and trigger the gun to force solvent
from the hose. Do not let the pump run dry for more
than 30 seconds to avoid damaging the pump pack-
ings! Then follow the Pressure Relief Procedure
Warning on page 11.
9.
Leave the pressure drain valve open until you are
bowl and reinstall the clean screen. Reinstall the
ready to use the sprayer again. Unscrew the filter
bowl, hand tight only.
IO.
I f you flushed with mineral spirits and are going to
use a water-base paint, flush with soapy water fol-
sure Rellef Procedure Warning on page 11.
lowed by a clean water flush. Then follow the Pres-
3. Close the filter's 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.
-1
Fig
1
To reduce the risk of static sparking and splashing,
always remove the spray tip form the gun, and hold
a metal part of the gun firmly to the side of and aimed
into
a
grounded metal pail when flushing.
METAL TO META
CONTACT WHEN
FLUSHING
12
307-893