Retooling Of Spray Gun; Cleaning - Complete - WALTHER PILOT PILOT WA 200 Instrucciones De Servicio

5.4

Retooling of Spray Gun

Combinations of air cap, material nozzle + needle, designed to match specific spraying
media types and grades, form a unit - namely the nozzle insert assembly, which must
always be interchanged as a complete assembly to maintain the desired spray-finish
quality standard.
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Warning
Prior to retooling: make sure that the spray gun is in unpressurized condition, i.e. all
air and material inputs must be shut off - if not, imminent risk of injury.
Note
Please use the drawing at the beginning of these operating instructions in order to per-
form the operating steps presented hereafter.
Replacement of Air Cap and Material Nozzle
1. Unsrew the sleeve nut pos. 2 from the front part pos.4.
2. Remove the air cap pos. 2(. ) and unsrew the material nozzle pos. 3 from the front
part.
Installation of the air and materila nozzle is performed in reverse order.
Replacement of Material Needle
1. Unscrew the pull rod pos. 25.
2. Unscrew the spring bushing pos. 24 from the housing pos. 6 and remove the valve
spring pos. 23.
3. Pull out the material needle complete with the piston pos. 18 of the housing.
4. Unscrew the piston screw pos. 22 (ws 6 a. ws 10) and remove the spring pos. 21 of
the piston.
5. Push the material needle backward of the piston.
6. Change the material needle by loosing both needle nut pos. 20.
Installation of the new material needle is performed in reverse order.
Note
The slip gauge of the material needle is 79 mm from the needle tip to the first needle
retaining nut.
Note
Apply a thin film of grease to the following components during assembly:
cup seal pos. 17, material needle pos. 19, spring pos. 21, valve spring pos. 23.
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6 Cleaning
6.1 Safety Warnings
• Make sure that the spray gun is in unpressurized condition, i.e. all air and mate-
rial inputs must be shut off - if not, imminent risk of injury.
• Open fires, naked lights and smoking is prohibited in the working area.There is
an increasing risk of fire and explosion, when spraying readily flammable media
(such as cleaning solutions).
• Observe all processing specifactions and safety warnings issued by the manu-
facturer of cleaning media. Especially aggressive and corrosive media repre-
sents risks and hazard to personal health.
6.2

Cleaning - Complete

The spray gun should be frequently cleaned and lubricated so as to ensure a long
service life and functional reliability. Clean the gun only with cleaning solutions
recommended by the manufacturer of the spraying material, which do not contain
any of the following constituents:
• halogenated hydrocarbons
(e.g. 1,1,1, trichloroethane; methylene chloride, etc.)
• acids and acidiferous cleaning solutions
• regenerated solvents (so-called cleaning dilutions)
• paint removers
The above constituents cause chemical reactions with electroplated components
resulting in corrosion damage. WALTHER PILOT is not responsible for damages
resulting from this kind of treatment.
Clean the spray gun
• prior to each change of the spraying medium
• at least once a week
• as often as may be required by the spraying medium handled and the resulted
degree of fouling.
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Caution
Never immerse the spray gun in solvent or any other cleaning solution as such
measure is very likely to affect the functional reliability and efficiency of the gun.
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Caution
Do not use any hard, pointed or sharp-edged objects when cleaning the spray
gun, as the precision-made parts can be easily damaged and are likely to affect
your spraying results.
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