Service
Air Cap/Nozzle/Resistor Stud
Replacement
1. Prepare the gun for service as instructed on
page 29.
2. Point the front end of the gun up while removing
the air cap assembly (1, 3, 9, 12). See Fig. 20.
CAUTION
Hold the front end of the gun up while removing the
nozzle and resistor stud to help drain the gun and
prevent any fluid left in the gun from entering the
air passages.
3. Remove the fluid nozzle (14) with the nozzle
wrench (76).
The resistor stud (15) should come out with the
fluid nozzle. If the resistor stud remains in the gun,
start the nozzle threads onto the resistor stud and
pull it out.
4. Unscrew the resistor stud (15) from the fluid
nozzle (14) with the hex key wrench (83). See
Fig. 21.
FIRE, EXPLOSION, AND ELECTRIC
SHOCK HAZARD
The resistor stud contact ring (S) is a
conductive contact ring, not a sealing
o-ring. See Fig. 20. To reduce the risk of
sparking, which could cause a fire,
explosion, or electric shock,
do not
remove the contact ring (S) from the re-
sistor stud or operate the gun without
the contact ring in place. If the resistor
stud (15) is being replaced, only use a
genuine Graco part.
WARNING
5. Lightly lubricate the o-ring (16) with petroleum jelly
and install it on the resistor stud (15). See Fig. 20.
Apply a very light coat of lubricant to the o-ring (16).
Tighten the nozzle (14) hand-tight, then 1/8 to 1/4 turn more.
Fig. 20
03455
1, 3, 9,12
15
14
76
13
12
16
14
S
15
1
9
3
Tighten the resistor stud
(15) into the nozzle (14) to 10 in-lbs
(1.15 N
S
m).
Fig. 21
14
15
83
0444
Continued on next page.
