Preventive Maintenance - DeVilbiss Viper Operation Manual

STARTING-UP
1. Turn the needle adjusting knob clockwise until it.
2. Turn the "Fan" and "Atom air valves counter-clockwise to be full open.
3. Set the air pressure at the air regulator to achieve recommended pressures above.
4. Turn the adjusting knob counter clockwise to obtain the desired fluid flow.
5. Test spray. If the finish is too dry or fine, reduce airflow by reducing air inlet pressure or by the valve
(13 Atom) screwing it in clockwise, or increase fluid flow using ratchet knob rotating counter clockwise.
6. If the finish is too wet, turn the needle button (25) in clockwise to reduce the fluid flow, or reduce the
fluid pressure.
If the atomization is too coarse, increase inlet air pressure, or reduce fluid flow.
7. The pattern size can be reduced by turning adjusting valve "Fan" (13) clockwise.
8. The spray pattern will give the best results when perpendicular to the target.
9. The recommended spray distance is 150-220 mm (6'' to 8'').
10. Spray edges first. Overlap each stroke a minimum of 50%. Move gun at a constant speed.
11. Always turn off air and fluid supply and relieve pressure and clean down when gun is not in us.

PREVENTIVE MAINTENANCE

Turn off air and coating supply and relieve pressure in the supply lines, before any maintenance
operation.
Tip (5) & needle (18)
Remove the air cap and its retaining ring by unscrewing by
turn counter- clockwise (Fig 1).
Remove the tip and its baffle
counter- clockwise (Fig 2). Unscrew the adjusting needle knob
in counter-clockwise rotation and pull out the needle at the
After refitting the needle and before refitting the nozzle, push
bellows (with the tube supplied) back in order to put it in
contact with the needle shoulder so as to make the product
passage free.
The fluid tip and baffle are permanently fitted together. There is no
possibility to separate them. The baffle will be damage if you try to
dismantle.
(5) by unscrewing by ¼ turn
7
Tube
¼
fully
back.
the