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39
KEY
39
Fluid Adjusting Screw
fi1
Fan Valve Assembly
Fig 4 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
NOTE:
When increasing to a wide, flat pattern, you
may have to increase the supply of fluid to
the gun to maintain the same amount of
coverage over a large area.
Adjust the system's control device, so the gun starts
spraying just before meeting the workpiece, and stops
as soon as it has passed.
See the Spray Pattern Troubleshooting Chart in the
Service section for additional information.
When all adjustments of atomizing air, fluid pressure,
and fan pattern are made, the high voltage can be turn-
ed on and operation can begin.
Cleaning
~-----WARNING-----
.....
For Your Safety. always follow the Pressure
Relief Procedure on page 2 when shutting off the
system, when you stop spraying and before check-
ing, servicing, installing, cleaning or changing any
part in the system.
1. Clean the fluid and air line filters daily.
2. Clean the outside of the gun daily with a soft cloth
dampened in a compatible solvent.
3. Clean the air cap and fluid tip daily, minimum. Some
applications
require
more frequent
cleaning.
Replace the fluid tip and air cap if they are damaged.
See Clean the Air Cap and Fluid Tip below.
4. Check the electrode resistor (55). Straighten it if it is
bent, and replace it if it is broken or damaged. See
page 11 for replacing the electrode resistor.
5. Check all of the work hangers for build-up of
material; clean them, if necessary.
..... -----CAUTION - - - - - - - - .
Do not use metal tools to clean the air cap holes as
this may scratch them, and make sure the elec-
trode wire is not damaged. Scratches in the air cap
holes or a damaged electrode wire can distort the
spray pattern.
Do not use any cleaning method which may
allow solvent into the gun air passages. Clogg-
ed air passages cause poor atomization and ex-
cessive current demands. Point the gun down
while cleaning to prevent dirty solvent from run-
ning back into the air passages. NEVER IMMERSE
THE GUN IN SOLVENT.
Clean all parts with a non··conductive solvent,
compatible with the fluid being sprayed. Conduc-
tive solvents can cause the gun to malfunction.
Clean the Air Cap and Fluid Tip
Equipment needed:
Soft bristle brush (supplied).
Fluid tip wrench (supplied).
Solvent compatible with fluid being sprayed.
Procedure:
1.
Turn off the Power Supply.
2.
Shut off the fluid and air supply lines to the gun.
3.
Actuate the gun to release the air and fluid pressure
trapped in the lines.
4.
Note the position of the fluid adjusting screw (39).
See Fig 4. Turn the fluid adjusting screw to relieve
spring tension on needle assembly.
5.
Remove the air cap retaining nut (27) and air cap
(32). See Fig 5. With the wrench (83b) supplied,
remove the fluid tip (30).
6.
Use the soft br.c;tle brush
(83a)
supplied and solvent
to clean air cap, fluid tip, and front part of the gun.
7.
Screw the fluid tip back into the gun. Tighten the tip
securely with the wrench (83b). Torque the fluid tip
to 1.1 to 1.4 N·m (10 to 12 in-Ib). See Fig 5.
\
55
/ /
{..
j
~
(J
~~32
~27
KEY
27
Retaining Nut
30
Fluid Tip
32
Air Cap
56
Electrode Resistor
Fig 5 - - - - - - - - - - - - - - - - - -
8.
Replace the retaining nut and air cap carefully to
avoid bending the electrode wire. Tighten the re-
taining nut so it is snug, allowing the air cap to turn
with resistance. If it is too tight, the spray pattern
will be distorted.
9.
Reset the fluid adjusting screw (39) to its original
position. Measure the travel of the resistor elec-
trode. Full travel should be 2.5 mm (0.10 in.). The
gun is now ready for spraying.
Flushing
.....-----WARNING-----......
For Your Safety. always follow the Pressure
Relief Procedure on page 2 when shutting off the
system, when you stop spraying and before check-
ing, servicing, installing, cleaning or changing any
part in the system.
1. Turn off the high voltage power supply.
2. Disconnect and plug the fluid supply line.
3. Connect the solvent supply to the gun.
4. Run solvent through the gun.
5. Disconnect the solvent supply.
6. Reconnect the fluid supply line.
7. Trigger the gun until it is clean of solvent.
307-896
7
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