Wagner HVLP Conversion Gun - Manual (Page 5)

© Wagner Spray Tech. All rights reserved. 5 English
Cleaning the Spray Gun
It is very important to clean your HVLP spray gun thoroughly after
each use.
1. Empty the spray material from the cup.
2. Pour a small amount of the appropriate solvent in the cup and
attach the cup to the spray gun.
3. Shake and spray the gun in a well ventilated area.
NOTE: Do not restrict the nozzle when cleaning. Back
flushing of the system is not necessary.
4. Repeat the steps above until the solvent appears clear.
5. Wipe the interior/exterior of the cup and the spray gun with
the appropriate solvent until it is clean.
6. Remove the needle, fluid nozzle, and air cap and clean
them thoroughly. Make sure that the air holes and material
passages are completely clean. Never use metal tools or picks
to clean the air cap or nozzle.
IMPORTaNT: any attempt to remove the fluid inlet fitting will
result in damage to the gun body and void the warranty.
NOTE: Remove the needle packing only when replacing
with a new needle packing. Do not remove the
needle packing for cleaning.
7. Disassemble, clean, and dry the check valve and air tubes after
each use.
IMPORTaNT: DO NOT clean the air tubes with hot solvents such as
lacquer thinner. hot solvents will damage the air tubes.
NOTE: Lubricate all of the threaded parts on the spray
gun with petroleum jelly when you put them back
together. This will help keep them working properly.
IMPORTaNT: Do not use any lubricants containing silicone.
Silicone can cause problems when used with some paints.
Maintenance
Perform the following maintenance procedures to keep your HVLP
spray gun working properly.
adjusting the Packing Nut
If material leaks from around or through the packing nut, readjust the
packing nut.
1. Disconnect the air hose from the air inlet and remove the cup
assembly.
2. Pull the trigger all the way back and hold.
3. Tighten the packing nut using a 3/8 inch wrench until the
needle remains retracted inside the nozzle when you release
the trigger.
Packing Nut 4. Loosen the packing nut slowly
until the needle moves freely
back into position in the nozzle.
Once you have adjusted the nut,
reconnect the air hose and the cup
assembly. Squeeze the trigger to see if
the leaking has stopped. If it has not,
make sure the packing nut is as tight as
possible, while allowing the needle to
move freely. If adjusting the packing
nut does not stop the leak, replace the
packing.
Replacing the Needle Packing and air valve Seals
NOTE: Remove the needle packing only when replacing
with a new needle packing. Do not remove the
needle packing for cleaning.
The needle packing and the air valve seals can be
replaced separately. If you are replacing only one of
them, use the appropriate steps from the following
procedures.
Removing the Needle and housing
1. Disconnect the air hose from the air inlet.
2. Remove the material hose or cup assembly.
3. Remove the snap rings from the trigger retaining pins and
slide the pins out of the gun.
4. Remove the trigger.
Trigger
Retaining
Pins
Snap Rings
Regulator
Trigger
Cup Assembly
5. Loosen the packing nut using a 3/8 inch wrench.
6. Loosen and remove the material flow adjustment housing,
needle, seal, and spring using a wrench.
Material
Adjustment
Housing
Seal and
Spring
Needle
Packing Nut
7. Insert an 1/8 inch hex wrench into the back of the needle
guide shaft.
8. Hold the retaining nut with a wrench and turn the 1/8 inch
hex wrench counterclockwise to remove the retaining nut.
9. Pull the needle guide shaft out of the gun body.
Retaining Nut
Needle
Guide Shaft