Tip Guard, Air Cap, Spray Tip, Or Seat Housing Replacement - Graco PRO AA5500SC Instructions And Parts List

Tip Guard, Air Cap, Spray Tip, or Seat
Housing Replacement
1. Remove the retaining nut (1), tip guard, (12), air
cap (15), spray tip (13), and gun shroud (2). See
Fig. 28 . You may have to turn the air cap with the
tip guard to remove the air cap from the gun.
2. Replace the tip gasket (13a) if damaged.
3. Remove the seat housing (14) with the 9 mm
driver (84), supplied. See Fig. 29 .
CAUTION
The barrel resistor cartridge (B) is part of the barrel
and is not replaceable. To avoid destroying the gun
barrel, do not attempt to remove the barrel resistor
cartridge.
WARNING
The barrel contact ring (26a) is a conductive con-
tact ring, NOT a sealing o-ring. Refer to Fig. 28 .
To reduce the risk of sparking, which could cause
fire, explosion, or electrostatic shock and result in
serious injury, Do not remove the barrel contact
ring from the barrel except to replace it and never
operate the gun without the contact ring in place.
Do not replace the contact ring with anything but a
genuine Graco part.
4. Install the seat housing (14) with the 9 mm driver
(84). Tighten the seat housing until it's snug and
then tighten it 1/4 turn more; do not over-tighten.
CAUTION
To avoid damaging the seat housing and gun bar-
rel, never over-tighten the seat housing. Over-tight-
ening may result in improper fluid shut-off.
5. Make sure the electrode (15a) is not bent, dam-
aged or missing from the air cap. See page 32 to
install it.
WARNING
To reduce the risk of electrostatic shock or explo-
sion, never operate the spray gun with a bent,
damaged or missing electrode (15a).
6. Place the spray tip (13) in the air cap (15). Align
the tab of the tip with the groove in the air cap.
See Fig. 30 . Be careful not to bend the electrode
wire (15a).
Service
7. Slide the shroud (2) onto the gun. See Fig. 28 .
8. If done servicing the gun, install the spray tip (13)
and air cap (15), tip guard (12), and retaining nut
(1). Tighten the retaining nut firmly.
9. Test gun resistance as instructed on page 26.
10. Install the gun onto the manifold and bracket as
instructed on page 39.
15
12
1
Fig. 28
84
Fig. 29
15a
Fig. 30
2
13a
13
26a
14
B
Tighten seat housing until snug, then
tighten 1/4 turn more; do not over-tighten
15
13
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