Setup
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.
Slot
Horizontal air 
cap position (standard)
Vertical air cap position
Tip locating tab | TI6847A |
|
FIG. 5
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 FIG. 5.
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 FIG. 5. When relocating the pin use
The air cap alignment pin can be removed according to preference. Air cap alignment pins will not work with model G40 guns.
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.
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 FIG. 6. For the G15 air cap, the alignment pin will stop the rotation in the proper orientation.
TI6558A
FIG. 6
Tighten the air cap retaining ring (6) firmly by hand to ensure a good seal between the tip gasket and the dif- fuser (5).
8 | 3A0149C |