Fluid Tube Removal & Replacement; Fluid Filter Replacement - Graco PRO AA5500SC Instructions And Parts List

Fluid Tube Removal & Replacement
To remove the fluid tube assembly (18) for cleaning or
replacement:
1. Remove the retaining nut (1), tip guard, (12), air
cap (15), spray tip (13), and gun shroud (2) as
instructed on page 31.
2. Disconnect the bottom fluid tube nut (C). See
Fig. 32 .
3. Carefully unscrew the top fluid tube nut (D).
CAUTION
Be careful not to damage the fluid tube assembly
(18) when cleaning or installing it, especially the
sealing surface (E). See Fig. 33 . If the sealing
surface is damaged, the entire fluid tube assembly
must be replaced.
4. Apply dielectric grease (83), supplied, to the entire
length of the plastic extension on the end of the
fluid tube (18). See Fig. 33 .
5. Apply a low strength thread sealer (such as purple
Loctite ) to the fluid tube nut (D) threads.
6. Install the fluid tube into the gun barrel by tighten-
ing the top fluid tube nut (D) hand-tight, then turn it
1/4 to 1/2 turn with a wrench. See Fig. 32 . There
will be a gap between the nut and barrel. Do not
over-tighten it.
7. Make sure the fluid filter (4) is in place, then
tighten the bottom fluid tube nut (C) onto the fluid
fitting (3); make sure the top fluid tube nut (D)
remains tightened.
8. Install the spray tip (13) and air cap (15), tip guard
(12), retaining nut (1) and shroud (2) as instructed
on page 31.
9. Test gun resistance as instructed on page 26.
10. Install the gun onto the manifold and bracket as
instructed on page 39.
Service

Fluid Filter Replacement

1. Remove the retaining nut (1), tip guard, (12), air
cap (15), spray tip (13), and gun shroud (2) as
instructed on page 31.
2. Disconnect the bottom fluid tube nut (C). See
Fig. 32 .
3. Remove the fluid filter (4). Clean or replace the
filter, as needed.
4. Install the fluid filter (4) and tighten the bottom fluid
tube nut (C) onto the fluid fitting (3); make sure the
top fluid tube nut (D) remains tightened.
5. If done servicing the gun, install the spray tip (13),
air cap (15), tip guard (12), and retaining nut (1) as
instructed on page 31. Tighten the retaining nut
firmly.
6. Test gun resistance as instructed on page 26.
7. Install the gun onto the manifold and bracket as
instructed on page 39.
Tighten about 1/4–1/2 turn past hand-tight; there will be a gap
between nut & barrel; do not over-tighten
Fig. 32
E
Apply low strength (purple) Loctite or equivalent to threads
Apply dielectric grease, supplied, to entire length of fluid tube
plastic extension
Fig. 33
D
C
18
D C
3
4
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