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Repair
40 309298J
Fluid Tube Replacement
There are no replaceable parts in the fluid tube assem-
bly. Only remove when necessary.
1. Prepare the gun for service, page 35.
2. Remove the air cap assembly, page 37. Remove the
shroud (2).
3. Disconnect the bottom fluid tube nut (C). See F
IG.
26..
4. Carefully unscrew the top fluid tube nut (D).
5. Apply Part No. 116553 dielectric grease to the entire
length of the plastic extension on the end of the fluid
tube (19).
6. Apply low strength thread sealant to the fluid tube
nut threads.
7. Install the fluid tube into the gun barrel and tighten
the top nut (D) hand-tight, then 1/4 to 1/2 turn with a
wrench. There will be a gap between the nut and
barrel. Do not overtighten the nut.
8. Make sure the fluid filter (20) is in place. Tighten the
bottom nut (C) onto the fitting (22) and torque to
20-30 in-lb (2.3-3.4 N•m). Make sure the top nut
remains tight.
9. Reinstall the shroud and air cap assembly, page 37.
10. Test gun resistance, page 29.
Fig. 26. Fluid Tube Replacement
Fluid Filter Removal
1. Prepare the gun for service, page 35.
2. Remove the air cap assembly, page 37. Remove the
shroud (2).
3. Disconnect the bottom fluid tube nut (C).
4. Remove the fluid filter (20). Clean or replace the fil-
ter, as needed.
Replacement filters are available in 100 mesh (stan-
dard) or 60 mesh sizes. See page 52.
5. Install the fluid filter. Tighten the bottom nut (C) onto
the fitting (22) and torque to 20-30 in-lb (2.3-3.4
N•m). Make sure the top nut (D) remains tight.
6. Reinstall the shroud and air cap assembly, page 37.
7. Test gun resistance, page 29.
CAUTION
Be careful not to damage the fluid tube assembly (19)
when cleaning or installing it, especially the sealing
surface (E). If the sealing surface is damaged, the
entire fluid tube assembly must be replaced.
CAUTION
Be sure the fluid tube (19) is not twisted after tighten-
ing the bottom nut (C).
ti1524a
C
D
E
20