Graco GX-7A Instructions Manual page 25

4. Remove the gun from the coupling block (J). Follow
Remove Coupling Block, page 16.
5. Attach the service block of the gun service kit to the
spray gun, and then tighten using a 5/16 in. nut
driver.
6. Pressurize Service Kit container up to 100 psi.
DO NOT EXCEED 100 psi (0.7 MPa, 7 bar).
7. Open one manual valve (C) on service block.
8. Connect air to the gun.
9. Set the safety lock (H) to OPEN.
H
Red Band
ti39023a
311321W
OPEN
Red band exposed to
spray.
10. Hold the gun against a grounded waste container.
11. Trigger the gun while holding against a grounded
waste container until there is a fine, unobstructed
mist of gun cleaner.
12. Release the trigger (D) of the gun and 1-quart kit,
and close manual valves (C) on the service block.
13. Repeat steps 5-7 for other side of the gun.
14. After initial cleaning, remove the air cap (M), PCD
retainer (ZAD), and PCD (ZAC). Flush a second time
to ensure thorough cleaning.
15. Remove the service block of the gun service kit
from the spray gun.
16. Set the safety lock (H) to CLOSED (SERVICE).
17. Disconnect the air supply.
18. Clean screens (V), check valves (Z) and screen
screw (Y, ZAJ) as required. See Service Screen
Screw, page 26.
NOTE: Inspect the air cap (M), mixing chamber, and
gun block (B) for build up of material and clean as
required. Do not use metal cleaning devices to clean
plastic components.
Maintenance
25