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308640 9
Operation
Adjust the Spray Pattern
WARNING
RECOIL HAZARD
Due to the very high pressure fluid
emitted, a strong recoil action will occur
when you trigger this gun. If you are
unprepared, your hand could be forced back
toward your body or you could lose your balance
and fall, resulting in serious injury.
WARNING
INJECTION HAZARD
To reduce the risk of component rupture
and serious injury, including injection, do
not exceed the gun’s maximum fluid
working pressure of 4000 psi (28 MPa, 280 bar) or
the maximum working pressure of the lowest rated
component in the system.
1. Set the fluid pressure with the fluid regulator. Do
not turn on the air supply yet.
2. Trigger the gun to check the atomization; do not be
concerned about the pattern shape yet.
3. Increase the fluid pressure just to the point where
a further increase in fluid pressure does not signifi-
cantly improve fluid atomization.
4. Close the pattern adjustment valve by turning the
knob (see Fig. 4) counterclockwise all the way.
This sets the gun for its widest pattern.
5. Set the atomizing air pressure at about 10 psi (0.7
bar, 70 kPa). Check the spray pattern, then adjust
the air pressure until the tails are completely
atomized and pulled into the spray pattern. See
Fig. 5. Do not exceed 100 psi (0.7 MPa, 7 bar) air
pressure to the gun.
For a narrower pattern,
turn the pattern adjustment
valve knob clockwise. If the pattern is still not
narrow enough, increase the air pressure to the
gun slightly or use a different size tip.
NOTE: Pattern adjustment is not available with
guns with the AA RAC assembly as the air separa-
tor, part no. 178414, must be removed when the
RAC assembly is installed.
Fig. 4
0789
A
Pattern
Adjustment
Knob
No Air Too Little Air Right Amount
of Air
Fig. 5
0792