Graco Inc 289241 Operation, Pressure Relief Procedure, Adjust Spray Pattern, Applying the Fluid

Operation

Pressure Relief Procedure

1.Turn off air and fluid supply.

2.Hold a metal part of the gun firmly to a grounded metal pail. Trigger the gun to relieve pressure.

Adjust Spray Pattern

Do not exceed maximum working air pressure shown on front cover. Read warnings.

1.Rotate air cap to change spray pattern direction.

2.For maximum fluid flow and to prevent premature fluid nozzle wear, turn fluid adjustment knob (8-2) counterclockwise until no trigger restriction is felt. Then turn knob out 1/2 turn more.

3.If further fluid flow restriction is needed, use different size needle/nozzle/air cap combination.

If necessary, fluid adjustment knob (8-2) can be turned clockwise to reduce volume of fluid output. However, continuously spraying with fluid adjustment knob closed causes accelerated abrasive wear on fluid needle and trigger/air valve shaft interface.

If fluid adjustment knob (8-2) is turned in

all the way, the gun emits only air.

Operation

4.Pressure Feed only: Adjust fluid pressure to achieve desired fluid flow rate.

5.Test spray pattern and atomization while holding gun about 6 to 8 inches (150 to 200 mm) from test piece.

a.If pattern is too wide, turn pattern adjustment knob (5) clockwise to narrow pattern.

b.To create a round pattern, turn pattern adjustment knob (5) fully clockwise.

c.If pattern is too narrow, turn knob (5) counterclockwise.

d.Check atomization. Increase gun air supply pressure in 5 psi (34 kPa,

0.3bar) increments until you have the desired atomization.

Applying the Fluid

For the best results:

•Keep gun perpendicular to surface and consistent distance of about 6 to 8 inches (150 to 200 mm). Do not angle the gun as you spray.

•Use smooth, even strokes, with about 50% overlap.

•HVLP Guns: Use a slightly slower hand movement and make fewer passes than you would with a conventional air spray gun. Take care to avoid runs or sags.

312388K 5