Graco PRO Xs4 AA Paint Sprayer User Manual


 
Repair
36 309295
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.
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.
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 Nm).
8. Install the barrel, page 32.
Fig
.
1
.
Fig. 19. Air Valve
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.
CAUTION
When removing the air valve (21) be careful not to
damage the seat area.
ti1527a
25
15
21
*6
21a*