Repair
20 311001G
Repair

Items Needed for Service

• Seal Installation Tool (28)-- provided
• Nut Driver Tool (29) -- provided
• Gun Tool (30) -- provided
•O-ring Pick
•7/32 in. Hex Wrench
•3/16 in. Hex Wrench
• Compatible Solvent
• Lubricant (part number 111265)

Repair Kits

Fan Valve Replacement

1. Relieve the pressure, page 10.
2. Unscrew the fan valve packing nut (A) from the back
of the gun body (1). Slide the fan valve assembly (4)
out of the gun body. See FIG. 35.
3. Before reinstalling, turn the pattern adjustment valve
(C) of the replacement fan valve assembly (4) com-
pletely counterclockwise to prevent damage to the
seat (5c). Install the replacement fan valve assem-
bly into the gun body (1). Screw the packing nut (A)
into the gun body and torque to 90 in-lb (10.5 N•m).

Complete Gun Packing Repair

Disassembly

Seat Repair
1. Relieve the pressure, page 10. Remove the fluid
and air hoses from the gun.
2. Remove the air cap retaining ring (6), air cap (21),
and spray tip (33). See FIG. 36.
3. Trigger the gun to pull the needle housing off the
seat while you unscrew the diffuser (5) from the gun
body (1), using the gun tool (30).
• Seal Repair Kit 249422 is available. For best
results, use all the new parts in the kit. Kit parts
are marked with an asterisk, for example (7*).
• Plastic Seat Repair Kit 249424 and Carbide
Seat Repair Kit 249456 are available and can
be used with both Model G15 guns and Model
G40 guns. For best results, use all new parts in
the kit. Kit parts are marked with a symbol in
the Parts list, for example (5c†).
• Plastic Seat Kit 249424 is intended for low
pressure usage.
FIG. 35
• See Repair Kits, page 20.
• Clean parts with a solvent that is compatible
with the parts and the fluid being sprayed.
FIG. 36
TI6576A
A
C
14
1
Torque to 90 in-lb
(10.5 N•m).
1
TI6568A
21
33
6