Repairs / Replacements; Replacement Of Nozzles, Needles, Springs And Seals; Troubleshooting And Corrective Action; Disposal Of Cleaning / Servicing Substances - WALTHER PILOT WA 800 Betriebsanleitung

7

Repairs / Replacements

Warning
Prior to any repairs / replacements: Make sure that the spray gun is in unpressuri-
zed condition, i.e. all air and material inputs must be shut off - if not, imminent risk
of injury.
Notice
Please use the drawing at the beginning of these operating instructions to perform
the following procedures.
7.1 Replacement of defective Needle Packing
1. Unscrew the front body (pos. 6) and the piston casing (pos. 14) by loosing the
two cylinder head screw (pos. 7) from the adaptor plate (pos. 26).
2. Unscrew the draw bar (pos. 24).
3. Unscrew the cap (pos. 23) from piston casing (pos. 14).
4. Pull the material needle (pos. 21) out of the piston casing.
5. Unscrew the front body by loosing the four socket screw (pos. 5) from the
piston casing.
6. Unscrew the packing screw (pos. 10).
7. Pull out the needle packing (sealing washer pos. 8 and needle seal pos. 9)
with an auxilliary tool. Use a strong wire on which one end is bent making a
small hook.
8. Lubricate the new needle packing with non-acidic, non-resinogenic grease and
install the new needle packing in the front body.
Installation of the remaining parts is performed in reverse order.
Notice
Never reinstall a used needle packing (pos. 8+9) as otherwise the functional
sealing reliability of the spray gun will suffer.
7.2

Replacement of Nozzles, Needles, Springs and Seals

Dismantle the spray gun in accordance with Chapter 5.5 ReTooling the Spray Gun,
if the following components have to be replaced:
• Material Nozzle
• Pressure of the Piston
• Material Needle*
• Needle Spring*
• Friction ring-gasket*
• O-Ring of the Piston*
Notice
Parts marked with * must be lubricated with non-acidic, non-resinogenic grease
prior to installation.
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WALTHER Spritz- und Lackiersysteme repair kits are available for PILOT WA 800
models spray guns including all wearing parts:
Article No.: V 16 800 06 . . 3 (Standard-versions)
Article No.: V 16 820 03 . . 3 (Low pressure-versions)
Article No.: V 16 840 04 . . 3 (Medium pressure-versions)
Article No.: V 16 870 02 . . 3 (Adhesive-versions)
Wearing parts are also shown in the listing of replacement parts (in bold face).
8

Troubleshooting and Corrective Action

Warning
Prior to any servicing and repair work: Make sure that the spray gun is in unpressu-
rized condition, i.e. all air and material inputs must be shut off - if not, imminent risk
of injury.
Fault Cause
Material nozzle or need-
le fouled
Material nozzle or need-
Gun is dripping
le damaged
Packing screw too tight
Gun fails to Control air pressure too
open low
Needle packing leaks
Material leaks
from leakage
Packing screw too loose
boring
Level in material tank
Spray jet pulsa-
too low
ting or unsteady
9

Disposal of Cleaning / Servicing Substances

Disposal of any such substances must be in accordance with all applicable local and
national regulations, directives and laws.
Warning
Pay special attention to all processing specifications and safety warnings issued by
the manufacturers of spraying and cleaning media. The improper disposal of any
toxic waste material represents a serious threat to the environment, i.e. to the health
of mankind and animal life.
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Remedy
see 5.5 Retooling the Spray Gun
and cleaning
see 5.5 Retooling the Spray Gun
and replace
Loosen packing screw in slightly
with a screw driver
Increaese control air pressure to at
least 4.5 bar
see 7.1 Replacing Needle Packing
Tighten packing screw in slightly
with a screwdriver
Top-up material level (see opera-
ting instructions of plant systems
manufacturer)