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Repair
311321H 27
Clean Mixing Module
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 by hand.
FIG. 27: Unthread Cap from PCD Body
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 from end of valving rod. Set
safety stop to CLOSED (SERVICE).
9. Inspect valving rod for damage and replace
as required. Use cloth soaked in gun
cleaner or steel wool to clean and remove
buildup of mixed material from rod.
10.Clean mixing module.
a. Insert cleanout tool into pin vise.
b. Use cleanout tool to clean module
ports. Take care not to insert tool too far
causing damage to inside bore of mod-
ule. Use cotton swab soaked in gun
cleaner to clean bore of module.
FIG. 28: Clean Module Ports
GX-7A and GX-7 400 Models Only
Air cap and PCD retainer may be difficult
to separate during disassembly due to
overtightening or hardened mixed material.
Use retainer wrench to separate. When
reinstalling, apply lubricant to threads.
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).
If the valving rod is replaced, reset forward
stop.
Ensure cleanout tool size matches module
size used. See the Set-Up Charts on
pages 44 and 46.