Graco 3A0149E important safety instructions Reassembly

Repair

Reassembly

NOTE: See Repair Kits, page 20.

1.Install the tube gasket (22*) in the gun. Handtighten the fluid tube connector (C) into the gun’s fluid inlet. Handtighten the air inlet fitting (17) and screw (20). Torque the fluid tube connector to 150-160 in-lb (17-18 N•m). Torque the air inlet fitting to

210-220 in-lb (24-25 N•m). Torque the fluid tube bracket screw to 50-60 in-lb (6-7 N•m). See FIG. 43.

2.Install the inline fluid filter (12) into the base of the fluid tube. Screw the fluid inlet fitting (18) into the base of the tube. Torque to 175-185 in-lb (20-21 N•m). See FIG. 43.

3.Place the new u-cup (7*) on the seal installation tool (28*), with the u-cup lips facing the tool as shown in FIG. 41. Push the u-cup into the back of the gun until you feel a definite snap.

3	Lubricate lightly.
8	Lips face out of gun body.

83 7*

28*

TI6578A

FIG. 41

4.Lubricate the front end of the air valve assembly (8*). Gently slide the air valve assembly into the back of the gun, passing through the u-cup (7*), as far as it will go. Be careful not to damage the u-cup. See FIG. 43.

5.Carefully insert the thinner end of the shaft (9) into the air valve (8*).

6.Install the two springs (15 and 19). Screw the spring cap (11) into the back of the gun body. Torque to 210-220 in-lb (24-25 N•m).

7.Lightly lubricate the needle assembly o-rings and shaft where the packing slides. Be sure that the o-ring (2a*) is in place in the gun body (1).

8.Insert the fluid needle assembly (2) into the front of the gun. Use the nut driver (29) to screw the fluid needle assembly into the gun body (1) and torque to 50-60 in-lb (6-7 N•m). See FIG. 42.

1

29

2a*

2†

TI6575A

FIG. 42

9.Install the trigger (3), pivot pin (13), and nut (14). Use low strength thread locker and be sure that the brass piece of the fluid needle assembly (2) is behind the trigger. See FIG. 43. Lubricate both sides of the pivot pin where the trigger contacts the pin and lubricate the boss on both sides of the gun where the trigger contacts the gun body. Torque the nut to 20-30 in-lb (2-3 N•m).

10.Trigger the gun to pull the needle back while you screw the diffuser assembly (5) into the gun body

(1) using the gun tool (30). Torque to 155-165 in-lb (18-19 N•m). When properly tightened, the flange will bottom out on the gun.

11.Attach the retaining ring (6), air cap (21), and spray tip (33).

24 3A0149E