Graco ULTRA 600 231–307 Series A Instructions-Parts List Manual page 10

5. Flush the pump to remove the oil which was left
in to protect pump parts after factory testing. See
page 15.
6. Prepare the paint according to the manufacturer's
recommendations. Remove any paint skin. Stir the
paint to mix pigments. Strain the paint through a
fine nylon mesh bag (available at most paint deal-
ers) to remove particles that could clog the gun
filter or spray tip. This is an important step toward
trouble–free paint spraying.
How to use the gun safety latch
When engaged, the gun safety latch prevents the gun
from accidental triggering. See Fig. 2.
WARNING
If the gun still sprays when the gun safety latch is
engaged, adjust the gun. See manual 307–614,
supplied.
How to use the pressure drain valve
Use the pressure drain valve to relieve fluid pressure
from the pump and to help prime the pump. If the valve
senses an over pressure condition, it opens automati-
cally to relieve fluid pressure. If this happens, stop
spraying immediately, shut off and unplug the sprayer.
Determine the cause of the problem and correct it be-
fore operating the sprayer again. Refer also to the
Troubleshooting Guide, page 17. See Fig. 3.
Setup
How to use the pressure control
The pressure control controls the motor operation so
the sprayer maintains constant fluid pressure at the
pump outlet. Turn the pressure control knob fully coun-
terclockwise to obtain the minimum setting. Turn the
knob clockwise to increase pressure. See Fig. 4.
"ON SAFE"
"OFF SAFE"
Fig. 2
Fig. 3
Rotate to increase (+)
or decrease (–)
pressure
Fig. 4
Closed, or
spray position
Open or
drain, position
+
–
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