Graco AirPro 289002, Instructions Manual

Repair 

14

312579H

Repair

See Parts, page 16, for callout references.

Disassembly

1. Unscrew retaining ring (14) to remove air 

cap (13b). Check o-rings (13a and 13c) 
and replace if necessary.

2. Trigger gun while unscrewing nozzle (11) to 

prevent needle damage.

3. Check o-ring (19) and replace if necessary.

4. Remove fluid control valve (8), spring (26), 

needle (9), and nut (7). Inspect. Replace 
tip (9c), needle (9), and u-cup seal (20) as 
necessary. If replacing needle tip, use low 
strength thread adhesive on needle tip 
threads.

5. Remove spring (28) and push the air valve 

assembly (6) out the back of the gun. 
Inspect. Replace air valve assembly (6) 
and u-cup seal (20) as necessary. Use tool 
(33) to install u-cup seal.

6. Remove trigger nut (22), trigger pin (21), 

wave washer (18), and trigger (10).

7. Unscrew needle packing nut (17) and 

remove u-cup packing (16) and 
spreader (15).

8. Remove air control valve assembly (5). 

Inspect and replace as necessary.

9. Remove air inlet valve assembly (27). 

Inspect and replace as necessary.

Fluid Inlet Fitting Replacement

1. Remove fluid inlet fitting (4).

2. Remove fluid inlet gasket (3) from gun body 

and discard.

3. Apply thread sealant to replacement fluid 

inlet fitting (4) threads.

4. Snap the fluid inlet gasket (3) securely onto 

the fluid inlet fitting (4).

5. Screw in fluid inlet fitting (4) and torque to 

155-165 in.-lb (17.5-18.6 N•m).

6. Replace washer (28) as required.

Follow Pressure Relief Procedure, page 8.

PRESSURIZED EQUIPMENT HAZARD

•

Fluid inlet gasket (3) must be replaced if 
fluid inlet fitting (4) is removed from spray 
gun.

•

Failure to replace gasket (3) may result in 
air leakage into the fluid section causing a 
non-vented gravity cup to become
pressurized.