Graco Inc TI14427A, 313869B, TI14428A important safety instructions Reassembly

6.Use a 1/16 hex wrench to loosen the fluid needle set screw (7a). Remove the needle

(6) from the piston (7).

7.Check the fluid needle (6) for damage or excessive wear. Replace the needle if nec- essary.

NOTICE

The needle and tip are permanently bonded. To prevent damage to the needle, do not try to separate.

8.Use the 10 mm hex nut driver to remove the fluid packing nut (2).

9.Use the 10 mm wrench to remove the nozzle (4).

Reassembly

1.Lightly grease the new nozzle (4), which includes o-ring (3). Use the 10 mm wrench to install the nozzle. Torque to 155-165 in-lb (18-19 N•m).

2.Install the new air cap assembly (5, includes air cap, o-ring, washer, and align- ment pin) and the retaining ring (21).

NOTE: Be sure to move the alignment pin if you want a horizontal spray pattern. See Posi- tion Air Cap, page 16.

3.Use the 10 mm hex nut driver to install new fluid packing nut (2, includes o-ring). Torque to 80 in-lb (9.0 N•m).

4.Insert the new needle (6) in the piston (7). Apply medium-strength thread sealant to the setscrew (7a). Use the 1/16 hex wrench to torque the setscrew to 4.5 to 5.5 in-lb (0.5 to 0.6 N•m).

Service

76

1 7a

ti14944a

1Torque to 4.5 to 5.5 in-lb (0.5 to 0.6 N•m).

FIG. 18

NOTICE

To avoid damage, the nozzle (4) must be installed before the needle (6).

5.Grease the needle shaft and piston o-ring. Push the needle/piston assembly into the gun as far as possible. Insert spring (10).

6.Turn counterclockwise to fully open the fluid adjustment knob (11). Install the knob hand-tight.

NOTE: If you have an ultra-precision fluid adjustment knob, loosen the set screw to adjust the position of the hash markings for convenient reading.

ti14947a

Set screw

FIG. 19

313869B 25