Install Mixing Module; Clean Pattern Control Disc - Graco GX-7A Instructions Manual

Repair

Install Mixing Module

1. Install the safety lock (H); leave in OPEN position.
2. Connect the air supply to gun.
3. Depress the gun trigger (D) and slide the mixing
module (ZAH) over the end of the valving rod (N).
- GX-7 DI model only: ensure the valving rod (N)
alignment pin enters the alignment slot in the
gun block (B). Keep the gun trigger (D)
depressed.
4. With the gun trigger (D) depressed, thread the
mixing module retainer (ZAM) or the PCD body
(ZAE) with packing installed, by hand, and then
wrench tighten.
NOTICE
To avoid damage to module and gun block (B), do
not overtighten mixing module retainer (ZAM).
5. Release the gun trigger (D).
6. Install the PCD (ZAC) over the end of the mixing
module retainer (ZAM).
7. Thread the PCD retainer (ZAD) onto the gun block
(B). Hand tight.
8. Rotate flat PCD (ZAC) to adjust orientation as
required.
9. Adjust the valving rod (N). See Adjust Valving Rod,
page 23.
10. Thread the air cap (M) into place; hand tight.
11. Slide the safety lock (H) onto the rear of the air
cylinder. Push the safety lock partially forward and
rotate clockwise to set to OPEN.
ZAH
B
Retainer O-Ring
* Note the orientation of the fan tip.
F . 24 Install Mixing Module
IG
32
ZAE
ZAC*
M
ZAD

Clean Pattern Control Disc

1. Set the safety lock (H) to CLOSED (SERVICE).
H
ti39025a
2. Close both manual valves (C).
C
3. Turn off air to the air cap (M).
4. Use a cotton swab soaked in gun cleaner to clean
external surface of material build up. Light
scrubbing with impinger cleanout brush may also
be required.
a. Trigger the gun to the SERVICE position and
clean orifice area
NOTE: It is not always possible to clean all material
build-up from the PCD (ZAC) while assembled to the
gun. In this case, remove the PCD and clean inside
radius.
F . 25 Clean Pattern Control Disc
IG
CLOSED (SERVICE)
ti39022a
ZAC
GX-7A Model Shown
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