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.

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.

Pattern

Adjustment

Knob

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.

0789A

Fig. 4

No Air

Too Little Air

Right Amount

 

 

 

of Air

Fig. 5

 

 

0792

 

 

 

 

308640 9

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Hitachi 308640 manual Adjust the Spray Pattern, Recoil Hazard