5
TO REPLACE THE SEAL
CARTRIDGE ASSEMBLY (25)
1. Remove the fluid control knob
(20) and blue spring (17).
2. Pull out the fluid needle assembly
(19).
3. Unscrew the seal cartridge assem-
bly while squeezing the trigger.
4. Replace with new seal cartridge
assembly.
5. Reassemble the fluid needle
assembly, blue spring, and fluid
control knob.
HOW TO REPLACE THE
O-RING (11) IN THE SIDE PORT
CONTROL ASSEMBLY (8)
1. Remove the side port control
assembly.
2. Pry off the retaining ring (9).
3. Unscrew the fan control housing
(10).
4. Remove and replace the o-ring.
5. Reassemble.
HOW TO ADJUST THE FLUID
NEEDLE (19)
The effective length of the fluid needle
can be adjusted using the needle
locknut and needle cap, which are
part of fluid needle assembly (19).
1. Remove the fluid control knob
(20) and the blue spring (17).
2. Pull the fluid needle assembly
(19) out approximately 1-1/4".
3. Use the wrench (28) to loosen the
needle cap.
4. Screw the needle locknut out for
more trigger movement, in for
less trigger movement.
5. Adjust the fluid needle so the trigger
moves the air valve assembly (16)
1/16" to 3/32" before the fluid
needle assembly moves.
6. Tighten the needle cap with the
wrench.
7. Reassemble.
GENERAL INSTRUCTIONS FOR
AIR-SUPPLIED PAINT SPRAYING
To reduce overspray and obtain maxi-
mum efficiency, always spray with
the lowest possible fluid and air pres-
sure that produces an acceptable
spray pattern. Excessive atomizing air
pressure can increase overspray,
reduce transfer efficiency, and with
some materials, result in poor finish
quality from dry spray. Refer to the
nozzle and needle table on page 7 for
recommended atomizing pressure for
the different materials being sprayed.
For best results with pressure feed
hook-ups, use 1 to 4 psi fluid pres-
sure. Pressures higher than 4 psi fluid
pressure may be required for heavy-
bodied materials. Low fluid pressure
will produce a narrower than normal
spray pattern.
SIPHON SPRAYING
Set atomization pressure at approxi-
mately 50 PSI for lacquer and 60 PSI
for enamel. Test the spray. If the
spray is too fine, reduce the air
pressure or open the fluid control
knob (20). If the spray is too coarse,
close the fluid control knob. Adjust
the pattern width using the fan
control knob (12). Readjust the
spray if necessary.
PRESSURE SPRAYING
After selecting correct fluid nozzle,
set the fluid pressure for the desired
flow.
1. Open the atomization air and test
the spray. If the spray is too fine,
reduce the air pressure. If the
spray is too coarse, increase the
air pressure.
2. Adjust the pattern width using the
fan control knob (12) and readjust
the spray.
SPRAY TECHNIQUE
To get a good finish, you must handle
the gun properly. Hold the gun per-
pendicular to the surface you are
painting. Each paint stroke should be
made parallel to the plane of the sur-
face being painted. Start the stroke
before you trigger the gun and release
the trigger before you end the stroke.
This will give you accurate control of
both gun and material and prevent
excessive build-up of material at the
stroke ends.
The distance between the gun and
surface should be 6"-12" depending
on the material and the atomizing
pressure. The material deposited
should always be even and wet. Lap
each stroke about half of the preceding
stroke to obtain a uniform finish.
CORRECT SPRAY TECHNIQUE
INCORRECT SPRAY TECHNIQUE
6" TO 12"
Start
Stroke
Pull
Trigger
Release
Trigger
End
Stroke
Coating should be
even and wet
when spraying
Coating will
be light at
this point
Coating will
be heavy at
this point
CAUTION
Over-tightening may damage the
threads and make future adjust-
ments difficult.
!
NOTE
Keeping the fluid control knob (20)
in the open position reduces fluid
needle wear.
To reduce overspray and obtain
maximum efficiency, always spray
with the lowest possible atomization
air pressure.
WARNING
Always wear appropriate clothing,
including gloves, eye protection, and
a respirator when using the gun.
!
