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311320H 21
Valving Rod Adjustment
In closed position, valving rod should extend
approximately 1/32 in. (1 mm) beyond tip of
mixing chamber. If it does not, follow this pro-
cedure:
FIG. 19: Valving Rod (Closed Position)
1. Perform Pressure Relief Procedure (page
13) and Clean Spray Gun Procedure, page
18.
2. Disconnect air supply from gun.
3. Remove spring retainer case. Firmly grasp
spring retainer case, push in and rotate
counterclockwise. Pull spring out of air cyl-
inder.
FIG. 20: Retainer Case Removal
4. Loosen felt wiper retainer 2-3 turns (DO
NOT REMOVE).
5. Remove valving rod. Push back firmly on
piston rod until end of Stop Bar emerges
from cylinder.
FIG. 21: Valving Rod Removal
6. Loosen stop bar from positioner. Turn posi-
tioner to adjust length of valving rod as
required. Retighten stop bar against posi-
tioner.
7. Replace valving rod, spring, and spring
retainer case. Grasp firmly, push in, and
turn clockwise to lock in place.
8. Adjust felt wiper and soak with gun cleaner.
9. Connect air supply to gun.
10.Check action of valving rod. With manual
valves closed, press trigger several times
and ensure valving rod moves freely.
If you have encountered no problems, spray
gun is ready for test spray. Follow Daily
Start-up procedure (page 12) and Spray Pat-
tern Adjustment procedure (page 14).
1/32 in.
Spring Retainer Case
Spring
Positioner
Stop Bar