Fig. 25
Fig. 29
Fig. 31
Fig. 33
Fig. 26
Fig. 30
Fig. 32
REPLACING AIR VALVE
REASONS TO REPLACE AIR VALVE:
A) Air leak through the gun.
B) Air valve not operating correctly.
1. Remove trigger and fluid tube assembly. (See figs 25 & 26)
2. Unscrew air valve using 14 mm wrench. (See fig 27)
3. Remove air valve by gripping the stem. (See fig 28)
4. Remove spring with spring pad. (See fig 29)
5. Hook out rear seal using Service Tool. (See figs 30 & 31)
6. Clean air valve bores in gun body with the brush supplied in
the kit.
7. Place new rear seal onto Service tool; grooves must fit in
service tool form. (See fig 32)
8. Push rear seal firmly into hole up to shoulder, using Service
tool. (See figs 33 & 34)
9. Insert new spring, ensuring the end with the plastic bearing pad
goes in first. (See fig 29)
10. Insert air valve assembly into gun and carefully feed over the
spring and through the rear seal. (See fig 35)
11. Tighten air valve assembly using fingers first, then tighten with
14 mm wrench. Torque from 18 to 22 ft.-lbs. (See fig 36)
12. Replace fluid tube and trigger. (See figs 26 & 25)
!
CAUTION
Always ensure that all fluid and air pressure to the gun has been dis-
charged before proceeding with any repairs.
Fig. 36
Fig. 34
Fig. 27
Fig. 28
Fig. 35
EN
77-2921-R12 (2/2021)
9 / 14
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