Install Pcd; Check Adjustment Of Valving Rod - Graco GX-7A Instructions Manual

Optional Configuration

Install PCD

1. Perform the Pressure Relief Procedure, page 17.
2. Disconnect the air supply from the gun.
3. GX-7 model only: Loosen the forward stop screw.
4. GX-7 model only: Turn the forward stop nut (A)
clockwise (as viewed from front of gun) 1-2 turns.
Make sure the valve rod is exposed.
5. Slightly loosen the rear seal retainer assembly
(ZAP).
6. Remove the safety lock (H).
7. GX-7 DI model only: Use wrench to loosen the
piston locknut. Turn the valving rod (N) rearward as
far as it will turn.
8. Place and orient the PCD (ZAC) over the mixing
module retainer (ZAM) or the PCD body (ZAE).
9. Connect the gun to air pressure. Adjust the valve
rod (GX-7 DI) or cylinder front stop (GX-7) until the
tip of the rod is just touching the PCD (ZAC). The
PCD should be seated flat on the mixing module
(ZAH) or PCD body (ZAE).
10. GX-7 DI model only: Install PCD retainer (ZAD) and
hand tighten.
11. GX-7 model only: Install PCD retainer (ZAD) and
wrench tighten.
12. Adjust the valving rod (N). Follow Adjust Valving
Rod, page 23, for the appropriate gun model.
13. Set the safety lock (H) to OPEN.
H
Red Band
ti39023a
22
OPEN
Red band exposed to
spray.
Check Adjustment of Valving
Rod
1. With the air supply connected, pull the gun trigger
(D) and loosen the PCD retainer (ZAD). Release the
trigger.
2. Hand tighten the PCD retainer (ZAD).
3. While maintaining tightening torque, trigger the
gun. The retainer should rotate approximately 1/10
of turn.
4. Release the trigger (D).
311321W