Air Cap, Spray Tip, Or Seat Housing Replacement - Graco PRO AA4500 Instructions Manual

Tip Guard, Air Cap, Spray Tip, or Seat
Housing Replacement
1. Remove the retaining nut (8), tip guard, (2), air cap
(1), and spray tip (9). See Fig. 7. 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 (9a) if damaged.
3. Trigger the gun and remove the seat housing (21)
with the 9 mm driver (64), supplied. See Fig. 8.
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 (3a) is a conductive contact
ring, NOT a sealing o-ring. 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 bar-
rel 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. Trigger the gun and install the seat housing (21)
with the 9 mm driver (64). Tighten the seat housing
until it's snug and then tighten it 1/4 turn more.
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. Assemble the spray tip (9), air cap (1), and tip
guard (2). Then install them on the gun, securing
them with the retaining nut (8). Tighten the retain-
ing nut firmly.
Service
To avoid damaging the tip guard (2), orientate the
air cap (1) before tightening the retaining nut (8).
Do not turn the air cap when the retaining nut is
tight.
6. Make sure the electrode is not bent, damaged or
missing from the air cap.
To reduce the risk of electrostatic shock or explo-
sion, never operate the spray gun with a bent,
damaged or missing electrode.
7. Test the gun resistance as instructed on page 25.
1
2
8
Fig. 7
21
64
Fig. 8
CAUTION
WARNING
9a
9
B
02004A
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