309117 19
Service
Complete Gun Packing Replacement
Disassembly
NOTE:
Gun Repair Kit 241619 is available. The kit includes
an o-ring (17), gaskets (7, 12b), u-cups (18a, 22,
28a), air valve assembly (23), and seal installation
tool (34).
Clean parts with a solvent that is compatible with
the parts and the fluid being sprayed.
Lightly lubricate the parts indicated in Fig. 23 with
lubricant 111265.
WARNING
INJECTION HAZARD
To reduce the risk of a fluid injection
injury, follow the
Pressure Relief Proce-
dure
on page 9 before checking or
servicing any of the system equipment and when-
ever you are instructed to relieve pressure.
1.
Relieve the pressure. Remove the fluid and air
hoses from the gun.
2.
Remove the tip guard assembly (18), air cap (14),
and spray tip (33). See Fig. 23.
3.
Unscrew the air separator (16) from the front of the
gun body (1). Carefully remove the o-ring (17). Do
not damage the o-ring groove.
4.
Trigger the gun to pull the needle ball off the seat
while you unscrew the seat assembly (13) from the
gun body (1), using the gun tool (36). Remove and
discard the seat assembly gasket (12b).
NOTE:
Always install a new seat gasket (12b) when-
ever you remove the seat assembly (13).
5.
Remove the trigger lock screw (20), pivot pin (21),
and trigger (19).
6.
Unscrew the spring cap (27) from the back of the
gun body (1). Remove the two springs (25, 26).
7.
Use the needle wrench (41) on the flats of the
needle to prevent it from rotating while unscrewing
the needle extension (24) from the fluid needle.
See Fig. 20.
Fig. 20
12
24*
TI0390
41
8.
Pull the air valve assembly (23) out the back of the
gun.
9.
Grip the ball housing with a pliers and pull the fluid
needle assembly (12) out the front of the gun. If
the needle is bent or damaged, or the packing is
worn or leaking, replace the entire needle assem-
bly.
10. Remove the o-rings (12a) from the packing car-
tridge on the needle shaft. Clean the o-ring groove
and the needle.
11. Using a pick, remove the u-cup (22) from the gun
body.
12. Unscrew the fluid inlet fitting (11). Remove and
clean or replace the inline fluid filter (10).
13. Unscrew the fluid tube connector (C) from the
gun’s fluid inlet. Carefully remove the gasket (7).
Do not damage the seat.
