6.3
Cleaning - Routine
The spray gun need not necessarily be dismantled for cleaning if and when the
spray- ing medium is changed in regular intervals or upon termination of work
(depending on the material used).
Note
Clean and lubricate the spray gun frequently in accordance with Chapter
6.2 Cleaning - Complete
. This will ensure functional reliability of the spray gun.
The following requirements must be met before the routine cleaning work can be
performed:
1. The material tank must be claen and then be filled with a compatible cleaning
aolution. Material pressure has to be available at the spray gun.
The cleaning solution should not be sprayed.
2. Take the spray gun into operation (see
5.2 Starting the Spray Gun
).
3. Do not stop the spray gun until clear cleaning solution emerges from the nozzle.
The material supply of the series PILOT WA 7XX
can be manually released so that
it is not necessary to operate the complete spraying system.
All pressures should then be removed from the complete spraying system until the
next operation.
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.
Note
Please use the drawing at the beginning of these operating instructions to perform
the following procedures.
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1. Pull back the draw bar of the spray gun. The
material inlet is now open and both material
duct and material nozzle will be cleaned.
2. Do not let go of the drawbar until clear
cleaning solution emerges from the nozzle.
7.1
Replacement of defective Needle Packing
1. Remove all pressures from the gun.
2. Unscrew the 4 mounting screws in (Item 6) from the front body in (Item 7) (width
over flats of hex. nut 3).
3. Pull the front body in (Item 7) off the piston casing in (Item 18).
4. Unsrew the packing screw into (item 15) from the front part in (Item 7)
(screw driver).
5. Remove the packing spring in (Item 14) (replace, if damaged) and the pressure
ring in (Item 13) from the threaded socket.
6. Pull out the needle seal packing (item 12) with an auxilliary tool. Use a strong
wire on which one end is bent making a small hook.
7. Lubricate the new needle seal with non-acidic, non-resinogenic grease
8. Install the new needle seal in the gun body.
Installation of the remaining parts is performed in reverse order.
Note
Never reinstall a used needle seal packing (item 12) 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 Repalcement of Material
Control Nozzle and Needle
, if the following components have to be replaced:
• Material Nozzle
• Pressure of the Piston
• Material Needle*
• Needle Spring*
•
Piston Sealing Collar
*
• O-Ring of the Piston*
Note
Parts marked with * must be lubricated with non-acidic, non-resinogenic grease
prior to installation.
WALTHER Spritz- und Lackiersysteme repair kits are available for PILOT WA
7XX-series spray guns including all wearing parts:
Art. Nr.:
V 15 207 05 . . 3
(WA 705 / WA 715)
Art. Nr.:
V 15 207 25 . . 3
(WA 725 / WA 735)
Art. Nr.:
V 15 207 45 . . 3
(WA 745 / WA 755)
Art. Nr.:
V 15 207 08 . . 3
(WA 708 / WA 718)
Art. Nr.:
V 15 207 28 . . 3
(WA 728 / WA 738)
Wearing parts are also shown in the listing of replacement parts (in bold face).
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