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Repair
22 311321H
Repair
Service Screen Screw
1. Flush gun according to Clean Spray Gun
Procedure, page 20.
2. Unthread screen screw from gun block.
3. Remove check valve from screen screw.
Clean valve with gun cleaner and inspect
for damage. Replace if necessary.
4. Remove screen from screen screw. Soak in
gun cleaner or replace if clogged or dirty.
5. Clean screen screw cavity. If any particles
are visible, clean with clean out drills and
flush with gun cleaner.
6. Inspect screen screw seal for damage.
Replace if necessary.
7. Reinstall screen screw in gun block. Make
sure it is tight.
8. Flush gun with mixing module removed.
Remove Centerline
Components
Refer to FIG. 4 through FIG. 6 for diagrams of
centerline components for all gun models.
1. Flush gun according to Clean Spray Gun
Procedure, page 20.
2. Connect air supply to gun. Set safety stop
to OPEN.
3. Remove air cap.
4. Trigger gun and hold it to relieve pressure
on PCD retainer.
5. Remove PCD retainer by turning it counter-
clockwise.
6. Remove PCD from mixing module retainer.
7. Remove mixing module retainer.
8. Set safety stop to OPEN. Depress and
release gun trigger to unseat it. Remove
mixing module off end of valving rod. Set
safety stop to CLOSED (SERVICE).
9. Loosen rear packing nut 1-2 turns.
10.Push safety stop partially forward, rotate it
counterclockwise, and slide off air cylinder.
Shutdown proportioner and allow chemicals
to cool before servicing gun.
Clean A and R components in separate con-
tainers to avoid cross contamination.
CAUTION
Any material left in cavity on downstream
side of screen will clog mixing module.
To remove PCD that is stuck, set safety
stop to OPEN, depress and release gun
trigger to unseat it. Set safety stop to
CLOSED (SERVICE).
CAUTION
Do not use sharp objects or metal tools to
remove mixing module.