4. OPERATING INSTRUCTIONS
4.1.
GENERAL
4.1.1. For best results, it is important to handle the gun correctly. It should be held perpendicular
to the surface being sprayed and moved parallel with it. Start the stroke before squeezing
the trigger and release the trigger before finishing the stroke. This will enable you to
accurately control the gun and material (fig. 2).
4.1.2. Spray from a distance of 200 to 250mm depending on fluid and air pressure (3 - 4.5 bar).
The material deposited should always be even and wet. Each stroke must overlap the preceding
stroke to obtain a uniform finish. To reduce over-spray and obtain maximum efficiency,
spray with the lowest possible air pressure.
4.1.3. Controlling the fan spray and the fluid
a) The amount of fluid and spread can be controlled by regulating the control screws (fig.1).
b) As the width of the spray is increased more material must be allowed to pass through
the gun to obtain the same coverage on the increased area.
c) The direction of the fan spray, either horizontal or vertical, is obtained by turning the air
nozzle to the desired position then tightening the retaining ring.
Disconnect from the air supply before attempting any maintenance or cleaning. When reassembling after maintenance, take care when
screwing parts together. Always hand assemble to avoid cross-threading, using tools only for the final tightening. If a part cannot easily be
turned by hand, check that you have the correct part or unscrew, realign and try again.
DO NOT
use excessive force when reassembling.
5.1. Spray
gun
5.1.1. Immerse
only the front end of the gun
in solvent (fig. 3), until the solvent just covers the fluid connection.
5.1.2. Use a bristle brush and solvent to wash off accumulated paint.
5.1.3. Do not immerse the entire gun in solvent. This will cause packing to dissolve and dry out. Dirty solvent may also clog the narrow
passages in the gun.
5.1.4. Wipe the outside of the gun with a solvent dampened rag.
5.1.5. Lubricate the gun daily with a light machine oil. Be sure to lubricate the fluid needle packing, air valve
packing, side port control packing and trigger pivot point. Do not use lubricants containing silicone.
5.1.6. When finished spraying, flush the gun through with clean thinners.
5.2
Air nozzle, fluid nozzle and needle assembly
5.2.1. To clean the nozzles, soak in solvent to dissolve any dried material, then blow clean with air.
Handle all nozzles carefully and do not make any alterations in the gun.
5.2.2. If you need to probe the holes in the nozzles, be sure to use a tool that is softer than brass; do not use metal instruments.
5.2.3. Adjust the fluid needle valve so that when the gun is triggered, air flow occurs before fluid flow.
5. MAINTENANCE & CLEANING
fig. 3
NA2000 - 1095 - (1) - 180400
THE PROBLEM
THE CAUSE
THE SOLUTION
Fluid flow is too high for the
pressure and air flow.
Air pressure and air quantity too
high for paint flow
Air entering the fluid supply
One of the horn holes may be
blocked (A). In order to check it, turn
the air cap 180
O
, if the faulty pattern
is now upside down the hole must
be cleaned
Possible paint build-up between fluid
nozzle and air cap.
1. Increase air pressure by adjusting regulator and increase air
flow by air control.
2. Reduce paint flow with fluid control.
3. Paint may be too thick. If so, dilute it.
1. Reduce air pressure by adjusting regulator.
2. Reduce air flow by air control and increase paint flow with
fluid control.
1. Tighten the connection between the gun and the cup.
2. Tighten fluid nozzle with gun spanner.
3. Needle packing passing air - tighten packing screw or
replace O-ring.
3. Check whether paint pot is empty or air hole in lid is blocked.
1. Place the air cup in solvent.
2. Clean hole with compressed air or with a wooden toothpick.
DO NOT
use a metal probe which will damage the hole.
1. Clean the air cap and the fluid nozzle, check also that they
match correctly.
2. Check needle for damage.
6. TROUBLESHOOTING
Poor atomization / heavy centre pattern
Heavy atomization poor centre pattern
Heavy right or left side pattern
Top heavy or bottom heavy pattern
Intermittent spray pattern
fig. 2
