Fluid Needle Replacement; Replacement - Graco WB3000 Instructions - Parts Manual

Fluid Needle Replacement

1. See Prepare the Gun for Service, page
2. Remove the air cap assembly and fluid seat
housing. See Air Cap, Spray Tip, and Fluid Seat
Housing Replacement, page
3. Remove the gun barrel. See
Gun Barrel Removal, page
4. Remove the trigger screws (13) and trigger (12).
5. Unscrew the spring cap (37). Remove the spring
(20a).
6. Be sure the seat housing (24) is removed. Place
the 2 mm ball end wrench (60) in the back of
the fluid needle assembly. Push the tool forward
so the two segments of the needle engage, and
turn it counterclockwise about 12 full turns to
unthread the needle.
7. Using the external hex end of the plastic multi-tool
(61), carefully push straight on the fluid needle
ball from the front of the barrel until the fluid seals
release from the bore.
To prevent needle assembly separation or
damage, be certain needle is disengaged
before removing.
8. Remove the fluid needle assembly from the back
of the gun barrel.
9. Install the fluid needle assembly in the gun barrel.
Push in on the needle with the driver (60) and
tighten.
10. Install the spring (20a).
11. Install the spring cap (37). Make sure the
grounding spring (37a) is in place.
12. Install the trigger (12) and screws (13).
13. Install the gun barrel.
Gun Barrel Installation, page
14. Install the seat housing and air cap assembly.
See Air Cap, Spray Tip, and Fluid Seat Housing
Replacement, page
15. See Test Gun Resistance, page
3A2497C
47.
48.
50.
NOTICE
See
50.
48.
36.
Figure 29 Remove Cap and Springs
Figure 30 Remove Fluid Needle
Figure 31 Replace Fluid Needle
Repair
51