Graco Inc 311321H, GX-7 400, GX-7A Install Centerline Components, GX-7 DI Model Only

Repair

Install Centerline

Components

GX-7 DI Model Only

Before installation, ensure all gun components are clean and dry. Lubricate all moving parts and threads.

1.Install rear packing gland with packing wrench. Tighten onto gun block.

2.Install rear packing retainer loosely.

3.Install valving rod.

a.Connect valving rod to rod draw bar and insert into air cylinder.

b.Use 5/16 in. nut driver to thread assem- bly tight into end cap.

GX-7 DI model only: thread rod until approximately 3/16 in. to 1/4 in.of thread protrudes from end of piston rod.

4.Thread locknut onto valving rod by hand.

5.Carefully slide gun block onto valving rod toward air cylinder. Install gun block onto gun block mounting bracket.

6.Install safety stop; leave in OPEN position.

7.Connect air supply to gun.

8.Depress gun trigger and slide mixing mod- ule over end of valving rod.

GX-7 DI model only: ensure valving rod alignment pin enters alignment slot in gun block.

Keep gun trigger depressed.

9.With gun trigger depressed, thread mixing module retainer or PCD body with packing installed, by hand, and then wrench tighten.

CAUTION

To avoid damage to module and gun block, do not overtighten mixing module retainer.

10.Release gun trigger.

11.Install PCD over end of mixing module retainer.

12.Thread PCD retainer onto gun block. Hand tight.

13.Rotate flat PCD to adjust orientation as required.

14.Adjust valving rod. See Valving Rod Adjustment, page 16.

15.Thread air cap into place; hand tight.

16.Slide safety stop onto rear of air cylinder. Push safety stop partially forward and rotate clockwise to set to OPEN.

17.Set safety stop to CLOSED (SERVICE).

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