Graco Inc. TI14428A Manuel D’Utilisation

Service

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.

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).

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).

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.

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

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

7a

6

7

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

1

1

ti14944a

ti14947a

Set screw