Graco AirPro 289028, Instruction & Parts Manual

Repair

312578M

13

Reassembly

1. Install air control valve assembly (5) with 

valve turned fully counterclockwise to out-
ermost position. Torque to 85-90 in-lb
(9.6-10.2 N•m).

2. Install air inlet valve assembly (27) with 

valve turned fully counterclockwise to out-
ermost position. Torque to 205-215 in-lb
(23.2-24.3 N•m).

3. Lubricate u-cup spreader (15) and u-cup 

packing (16). Insert spreader (15) with 
tapered end facing rear of gun. Install 
u-cup packing (16) with open end facing 
front of gun. Install packing nut (17). 
Torque to
3 in-lb (0.3 N•m).

4. Install wave washer (18) with cupped side 

toward the gun body. Lubricate and apply 
thread retainer to trigger pin (10). Install 
trigger (10), trigger pin (21), and trigger 
nut (22). Torque to 15-20 in-lb
(1.7-2.2 N•m).

5. Install air valve assembly (6), spring (28), 

and nut (7). Torque to 175-185 in-lb
(19.8-20.9 N•m).

6. Install needle (9) and spring (26). Lightly 

lubricate and install fluid control valve (8).

7. Trigger gun while replacing nozzle (11). 

Torque to 155-165 in-lb (17.5-18.6 N•m).

8. Install air cap assembly (13) and retaining 

ring (14).

15

16

17

ti11226a