Replacing Air Valve - DeVilbiss SRI PRO series Technical Bulletin

Page 10 SB-2-855-B
PARTS REPLACEMENT/MAINTENANCE
AIR VALVE INSTRUCTIONS

Replacing Air Valve

Reasons to replace air valve:
A) Air leak through the gun.
B) Air valve not operating correctly.
1 . Remove trigger using a Star (T20) key . (See figs 13
& 14)
2 . Unscrew air valve using a 14 mm wrench . (See fig 15)
3 . Remove air valve by gripping the stem . (See fig 16)
4 . Remove spring with spring pad . (See fig 17)
5 . Hook out rear seal using Service Tool (46) . (See figs
18 & 19)
6 . Clean air valve bores in gun body with a brush .
7 . Place new rear seal onto Service tool (46); grooves
must fit in service tool form . (See fig 20)
8 . Push rear seal firmly into hole up to shoulder, using
Service tool . (See figs 21 & 22)
9 . Insert new spring, ensuring the end with the plastic
bearing pad goes in first . (See fig 17)
10 . Insert air valve assembly into gun and carefully feed
over the spring and through the rear seal . (See fig
23)
11 . Tighten air valve assembly using fingers first, then
tighten with a 14 mm wrench . (See fig 24)
12 . Replace trigger . (See figs 14 & 13)