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Service
Air Cap/Nozzle/Resistor Stud
Replacement (continued)
4. Unscrew the resistor stud (22) from the fluid
nozzle (21) with the multi-tool (62). See Fig. 17.
WARNING
FIRE, EXPLOSION, AND ELECTRIC
SHOCK HAZARD
The resistor stud contact ring (D) is a
conductive contact ring, not a sealing
o-ring. See Fig. 16. To reduce the risk of
sparking, which could cause a sparking
or electric shock, do not remove the
resistor stud contact ring (D) or operate
the gun without the contact ring in place.
Do not replace the resistor stud (22) with
anything but a genuine Graco part.
5. Remove the retaining ring (2) to free the air cap (1)
from the retaining nut (8).
Installation
1. Lightly lubricate the o-ring (25) with petroleum jelly,
and install it on the resistor stud (22). See Fig. 16.
2. Make sure the electrode (20) is tightened properly,
as shown in Fig. 18, page 32.
3. Install the resistor stud (22) in the fluid nozzle (21)
with the multi-tool (62). Tighten the resistor stud to
10 in-lb (1.13 NSm). See Fig. 17.
4. Trigger the gun while installing the fluid nozzle (21)
and resistor stud (22) assembly with the multi-tool
(62). Tighten the assembly until the fluid nozzle
seats in the gun barrel (1/8 to 1/4 turn past hand-
tight). See Fig. 16.
5. Test the gun resistance as instructed on page 28.
6. Install the air cap (1) into the retaining nut (8), and
secure it with the retaining ring (2).
7. Carefully install the air cap assembly (1, 2, 8) onto
the gun barrel. Do not bend the electrode (20)
wire, and be sure to insert the electrode wire
through the center air cap hole. Rotate the air cap
horns to the desired position.
8. Tighten the retaining nut (8) until the air cap is held
firmly in place; you should not be able to rotate the
air cap horns by hand.
2
21
22
25
D
Fig. 16
05154A
8
62
20
1
Apply a very light coat of lubricant to the o-ring (25).
Tighten the nozzle (21) hand-tight, then 1/8 to 1/4 turn more.
21
22
62
0444A
Fig. 17
Tighten the resistor stud (22) into the nozzle (21) to 10 in-lbs
(1.13 NSm).