Graco WB100, Instructions-Parts List Manual

Page: 72 / 112

Repair
Air Air Air Valve Valve Valve Repair Repair Repair
1. Follow the steps in
Prepare the Gun for Service, page 58 .
2. Follow the steps in Barrel Removal, page 65 .
3. Remove the screws (13) and trigger (12).
4. Remove the ES On-Off Valve. See ES On-Off
and Fluid Adjustment Valve Repair, page 71 .
5. Remove the spring (34).
6. Push on the front of the air valve shaft to force it
out the back of the handle. Inspect the rubber
seal (23a*) and replace if damaged.
7. Inspect the u-cup (35). Do not remove the u-cup
unless damaged. If removed, install the new one
with its lips facing into the gun handle (16). Place
the u-cup on the shaft of the air valve to help seat
it in the gun handle.
Figure 53 Install U-Cup
8. Install the air valve (23) and spring (34) into the
gun handle (16).
9. Install the ES On-Off Valve. See ES On-Off and
Fluid Adjustment Valve Repair, page 71 .
10. Install the trigger (12) and screws (13).
11. Follow the steps in Barrel Installation, page 65 .
Figure 54 Air Valve
72 3A2496H