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Setup
8 3A0149E
Setup
Flush Before Using Equipment
1. The equipment was tested with lightweight oil, which
is left in the fluid passages to protect parts. To avoid
contaminating your fluid with oil, flush the equipment
with a compatible solvent before using the equip-
ment. See Flushing and Cleaning, page 14.
2. Relieve the pressure. See Pressure Relief Proce-
dure, page 10.
Select a Spray Tip
The fluid flow and pattern width depend on the size of
the spray tip, the fluid viscosity, and the fluid pressure.
See Spray Tip Selection Chart, page 32. Contact your
Graco distributor for assistance in selecting an appropri-
ate spray tip for your application.
Air Cap Alignment Pin
Model G15 guns use an air cap alignment pin to position
the air cap. The standard location of the air cap align-
ment pin is the horizontal air cap position.
If you would like to change the spray pattern direction,
use a needle nose pliers to unscrew the pin and relocate
it to the desired position. See F
IG. 5. When relocating
the pin use low-strength thread locker. Torque to 1.5-2.5
in-lb (0.2-0.3 N•m). DO NOT OVERTIGHTEN.
The air cap alignment pin can be removed according to
preference. Air cap alignment pins will not work with
model G40 guns.
Install a Spray Tip
Install a spray tip in the air cap. Ensure that the tip locat-
ing tab is positioned in the slot of the air cap. See F
IG. 5.
Position the Air Cap
Assemble the air cap to the gun. The air cap and spray
tip position determine the direction of the spray pattern.
Rotate the air cap (the spray tip rotates with it) as
needed to achieve the desired spray pattern direction.
See F
IG. 6. For the G15 air cap, the alignment pin will
stop the rotation in the proper orientation.
Tighten the air cap retaining ring (6) firmly by hand to
ensure a good seal between the tip gasket and the dif-
fuser (5).
NOTICE
The alignment pin and retaining ring for current model
guns are different from the earlier model guns. They
are not interchangeable. Use of the incorrect pin will
result in fluid leakage or loss of the alignment feature.
Use of the wrong retaining ring will damage retaining
ring and gun threads. See Part Interchangeability
Guide, page 37.
FIG. 5
F
IG. 6
TI6847A
Slot
Tip locating tab
Horizontal air
cap position
(standard)
Vertical air
cap position
TI6558A