Tip Guard, Air Cap, Spray Tip, Or Seat Housing Replacement - Graco PRO AA5500sc unicarb Instruction Manual

Pre-OrificeTip Guard, Air Cap, Spray Tip,
or Seat Housing Replacement
1. Prepare the gun for service as instructed on
page 31.
2. Remove the seat housing (14) with the 9 mm
driver (84), supplied. See Fig. 30.
3. Replace the tip gasket (13a) if it is damaged.
CAUTION
The barrel resistor cartridge (B) is part of the barrel
and is not replaceable. Refer to page 33. To avoid
destroying the gun barrel, do not attempt to remove
the barrel resistor cartridge.
WARNING
FIRE, EXPLOSION, AND
ELECTRIC SHOCK HAZARD
The barrel contact ring (26a) is a con-
ductive contact ring, not a sealing o-ring.
Refer to Fig. 29. To reduce the risk of
sparking or electric shock, 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 barrel,
never over-tighten the seat housing. Over-tightening
may affect the fluid shut-off.
5. Make sure the electrode (15a) is not bent, dam-
aged or missing from the air cap. See Fig. 31. See
page 34 to install the electrode.
Service
15
12
1
Fig. 29


Tighten the seat housing (14) with the 9 mm driver (84) until it is
snug, then tighten it 1/4 turn more; do not over-tighten it.

14
84
Fig. 30
WARNING
FIRE, EXPLOSION, AND
ELECTRIC SHOCK HAZARD
To reduce the risk of fire, explosion, and
electric shock, never operate the spray
gun with a bent, damaged or missing
electrode (15a).
2
13a
13
26a
B
8801A
03237
308937 33