Graco 311320H important safety instructions Initial Set Up, Valving Rod Closed Position

Initial Set Up

1.Remove coupling block from gun.

2.Check valving rod clearance in closed posi- tion. Rod should extend approximately 1/32 in. (1 mm) beyond tip of mixing chamber. If it does not, see Valving Rod Adjustment procedure, page 21.

1/32 in.

FIG. 9: Valving Rod (Closed Position)

3.Adjust valving rod travel to initial setting.

a.Loosen friction lock. Turn valving rod adjustment screw clockwise until it stops.

b.Turn valving rod adjustment screw 11 turns counterclockwise.

4.Connect air supply hose to gun.

5.Connect A-isocyanate hose (red-taped) to notched fitting on coupling block. Then con- nect R-resin hose (blue-taped) to fitting without notches on coupling block.

6.Close both manual valves.

7.Pressurize the A and R chemical hoses and check for leaks. (See Proportioning Unit manual.)

8.Bleed air from chemical hoses:

a.Hold coupling block with exit ports pointed into disposable container.

Initial Set Up

b.Open each manual valve to allow trapped air to escape. Bleed each side until chemical is free of air.

c.Close both manual valves.

9.Use clean cloth soaked in gun cleaner to wipe clean coupling block and its mating surfaces.

CAUTION

To avoid accumulation of dirt and other con- taminants, do not apply grease to mating surfaces of coupling block.

10.Install coupling block to gun block.

11.Proceed with Daily Start-up procedure or Shutdown procedure as required.

311320H 11