Cleaning And Maintenance - WALTHER PILOT WA 100 Instrucciones De Funcionamiento

6 Retooling and Repairs
Warning
Control and atomizing air as well as material inputs must be shut off prior to retoo-
ling - risk of injury.
Note
Please refer to the exploded view (page 2) of these operating instructions to per-
form the steps detailed below.
Changing of the air cap
1. Remove the air cap (item 1) from the gun body (item 5).
Changing the material nozzle
1. Remove the air cap.
2. Remove the material nozzle (item 2) from the gun body using the size 7
wrench.
Changing the material needle
1. Remove the spring bushing (item 13) from the gun body.
2. Remove the piston spring (item 10).
3. Extricate the piston (item 9) with the material needle (item 11) from the gun
body.
The setting dimension of the needle (from the tip of the material needle to the
piston) is 39.5 mm.
Install the new material needle* in reverse order.
Changing the defective needle seal
1. Remove the material needle and - nozzle.
2. Screw off the packing screw (item 3) from the gun body.
3. Remove the needle seal packing (item 5) from the gun body. Use a thin wire,
one end of which is bent into a hook, for this purpose.
Installation of the new needle seal in reverse order.
Springs and Seals
If the following parts have to replace, dismantle the spray gun in accordance with
the work steps write above:
• Piston Spring
• O-ring of the piston*
Note
Parts marked * have to be lubricated with a non-acidic, non-resinogenic grease
prior to installation.
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7

Cleaning and Maintenance

• Make sure that the spray gun is in unpressurised condition, i.e. all air and
material 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 manuf-
acturer of cleaning media. Especially aggressive and corrosive media repre-
sents risks and hazard to personal health.
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.
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 Spritz-und Lackiersysteme GmbH is not
responsible for damages resulting from this kind of treatment.
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.
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.
1. Dismantle the gun as described in section 6 Retooling / Repairs.
2. Clean the air cap and nozzle with a brush dipped in the recommended cleaning
solution. Air cap and nozzle should always be cleaned properly to make sure
they fit well together. Material residue, which might impair the airflow, is thus
avoided.
3. Clean, if necessary, the material duct.
4. Clean the gun body and all remaining parts with a soft cloth and the recom-
mended cleaning solution.
5. Apply a thin layer of grease to the following parts:
• Piston spring
• O-ring of the piston
• Material needle.
Use non-acidic, non-resinogenic grease and a brush. The spray gun is then re-
assembled in reverse order.
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