Install The Fluid Nozzle And Air Cap; Adjust The Spray Pattern - Graco 218-026 Instructions-Parts List Manual

Install the Fluid Nozzle and Air Cap

WARNING
To reduce the risk of serious bodily injury, including
splashing in the eyes or on the skin or electric
shock, always follow the Pressure Relief Proce-
dure on page 9 before installing, or removing the
fluid nozzle/air cap assembly.
1. See Instruction Manual 307–803 for air cap con-
sumption and fluid nozzle flow rate information. The
fluid output and pattern shape depends on the fluid
nozzle size, fluid viscosity, and fluid pressure.
2. Remove the old air cap and fluid nozzle as instructed
in Clean the Air Cap and Fluid Nozzle, steps 1
through 4.
3. Push the pin housing (83) into the slot (A) on the front
of the gun until it bottoms out. See Fig 4.
4. Push the locking pin (84) into the housing (83).
5. Turn the locking pin (84) to the unlocked position, and
screw the new fluid nozzle (13) onto the gun. See Fig
5.
6. Turn the locking pin (84) to the locked position to lock
the fluid nozzle (13) in place.
7. Carefully install air cap assembly. Avoid bending
electrode (12). Tighten the retaining nut so it is snug,
allowing the air cap to turn with resistance. If too tight,
the spray pattern will be distorted.

Adjust the Spray Pattern

Follow these steps to establish the correct fluid flow and
air flow. DO NOT turn the ES ON–OFF lever to ON yet:
1. Adjust the fluid flow for the appropriate flow rate by
using the fluid pressure regulator installed in the fluid
line. Check the fluid nozzle chart in manual 307–803
for the appropriate flow rate for the air cap. Start with
the lowest rate shown and increase it until you get the
desired flow rate.
2. For fine adjustment, use the adjusting knob (Z) lo-
cated at the rear of the gun. See Fig 2. Turn the knob
clockwise to reduce the amount of fluid being
sprayed and counterclockwise to increase the
amount of fluid being sprayed.
3. Choose the correct size air cap for the type of fluid
being sprayed and the pattern desired.
4. Be sure the fan adjusting knob (AA) is closed (turned
fully clockwise).
5. Use an air pressure regulator to adjust the degree of
atomization. Always use the lowest air pressure pos-
sible for the most efficiency.
OPERATION
NOTE: A minimum of 2.8 bar (40 psi) air supply at the
gun is required to ensure full voltage from the
power supply. The gun may be operated at a
lower air pressure/voltage if required, but may
lose some electrostatic wrap.
6. First, complete all the checks under the Operating
Checklist on page 9. Then turn the ES ON–OFF
lever to ON. When spraying, the ES indicator light
should glow, indicating the electrostatic charge.
7. Use the fan adjusting knob to change the shape of
the spray pattern. Turn the knob counterclockwise
for a wide pattern and clockwise for a solid, round
pattern. When increasing to a wide, flat pattern, it
may be necessary to increase the supply of fluid to
the gun to maintain the same amount of coverage
over a large area.
NOTE: See the Spray Pattern Troubleshooting Chart
on page 13 to correct spray pattern problems.
KEY
A Slot
83 Pin Housing
Fig 4
KEY
13 Fluid Nozzle
14 Air Cap Assembly
84 Locking Pin
DETAIL
Locked
Position
84
Fig 5
A
13
83
14
DETAIL
Unlocked
Position
84