Graco PRO Xs4 AA manual Air Valve Repair

Air Valve Repair

1.Prepare the gun for service, page 26.

2.Remove the barrel, page 32.

3.Remove the air valve cap (25) from the handle (17). Remove the spring (15). See Fig. 19.

CAUTION

Clean all parts in non-conductive solvent compatible with the fluid being used, such as xylol or mineral spirits. Use of conductive solvents can cause the gun to malfunction.

4.Remove the air valve (21) with a pliers. Inspect the seal (21a) and replace if damaged. Be sure the seal is pressed securely onto the valve so the outer cone is flat.

CAUTION

When removing the air valve (21) be careful not to damage the seat area.

Repair

5.Inspect the u-cup (6*). Do not remove the u-cup unless damaged. If removed, install the new one with its lips facing into the gun handle (17).

6.Install the air valve (21) and spring (15) into the gun handle (17).

7.Install the air valve cap (25). Torque to 15-25 in-lb (1.7-2.8 N•m).

8.Install the barrel, page 32.

21 15 25 21a*

*6

ti1527a

Fig. 19. Air Valve

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