Fan Air Valve Replacement; Air Valve Replacement - Graco A Series Instructions-Parts List Manual

Fan Air Valve Replacement

Place a wrench on the valve housing (42) flats and
remove the housing from the handle. See Fig 13.
Remove the retaining ring (14). Remove the air adjusting
screw (41) from the valve housing (42), turning it
counterclockwise .
Clean all parts, inspect for wear or damage, and replace if
necessary.
Lubricate the o–ring and the threads of the air adjusting
screw (41) with petroleum jelly.
Install the adjusting screw (41) into the valve housing
(42), turning it clockwise, and secure it with the retaining
ring (14) .
Back the adjusting screw out of the valve housing (42)
until it bottoms out against the retaining ring (14).
Apply Loctite pipe sealant to the threads of the housing
(42). Install the housing (42) into the gun handle, torquing
it to 14–20 ft/lb (20–27 N.m).
KEY
14 Retaining Ring
41 Air Adjusting Screw Assy
42 Valve Housing
Apply Loctite
Torque to 14–20 ft/lb
(20–27 N.m)
14
Fig 14
SERVICE
42
41

Air Valve Replacement

Using a screwdriver, remove the retainer (29), spring
(62), and air valve stem (59) from the gun handle. See Fig
14. Replace parts as needed and install them back into
the gun handle.
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.
Install the new packing (18*) and guide (30) into the front
of the gun handle.
Tighten the guide (30) into the gun handle. Squeeze the
trigger and adjust it until there is no movement, then back
it off until it moves freely.
KEY
18 Packing
29 Retainer
30 Guide
59 Air Valve Stem
62 Spring
*18
30
Fig 13
29
62
59