Clean Mixing Module - Graco GX-7A Operation, Parts, Service, Repair

Clean Mixing Module

1. Flush gun according to Clean Spray Gun
Procedure, page 22.
2. Connect air supply to gun. Set safety stop
to OPEN.
3. Remove air cap by hand.
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.
Fit the side of the stamped 5/8 in. wrench
into the groove to separate. When reinstall-
ing, apply lubricant to threads.
F . 28: Unthread Cap from PCD Body
IG
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.
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).
7. Remove mixing module retainer.
311321N
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.
If the valving rod is replaced, reset forward
stop.
10. Clean mixing module.
Ensure cleanout tool size matches module
size used. See the Set-Up Charts on
pages 46 and 48.
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.
F . 29: Clean Module Ports
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Repair
29