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308-08419
SERVICE
Air Cap/Nozzle/Resistor Stud
Replacement
CAUTION
BE
SURE to
hold the front end of the gun up while
removing
the nozzle and resistor stud. This helps
drain
the gun
and prevent any paint or solvent left
in
the gun from entering the air passages.
1. Point
the front end of the gun up while removing the
fluid
nozzle (14) and resistor stud
(2) assembly with
the
nozzle wrench (48). This helps drain the gun and
prevent any paint or solvent left in the gun from
entering
the air passages. See Fig 15 .
If
the resistor stud remains in the gun when the fluid
nozzle is removed, start the nozzle thread onto the
stud
and pull the stud out.
2. Using
an
8 mm hex key (A), unscrew and remove the
resistor
stud (2). See Fig 16 .
WARNING
The
resistor stud contact ring (D) is a conductive con
-
tact
ring, NOT a
sealing o-ring. To reduce the risk of
sparking, which could cause fire, explosion, or elec-
trostatic shock and result in serious injury, DO NOT
remove
the contact ring from the resistor stud or op
-
erate the gun without the contact ring in place. DO
NOT replace the resistor stud with anything but a
genuine
Graco part.
T
o install the resistor stud:
3. Lightly lubricate the o-ring (31) with petroleum jelly
and
install it on the resistor stud (2).
4. Using an 8 mm hex key (A), install the resistor stud
(2) in the fluid nozzle (14). T ighten to 10 in-lb
(1.12 N
Sm).
Make sure the electrode (28) is tightened properly ,
as
shown in Fig 17 , page 20.
5. Install the fluid nozzle (14) and resistor stud (2)
assembly with the nozzle wrench (48). Tighten until
the
fluid nozzle seats in the gun barrel (1/8 to 1/4
turn
past
hand-tight).
6. Install the air cap assembly (6, 16, 43), o-ring (12),
and retaining ring (9). T est gun resistance as
instructed
on page 16.
Fig 15
KEY
D Contact
Ring
2
Resistor Stud
6, 16,
43
Air Cap Assembly
9
Retaining Ring
12 O-Ring
14
Fluid Nozzle
28 Electrode
31 O-Ring
48
Nozzle
Wrench
28
6,
16, 43
2
12
31
48
D
0443
9
14
Fig 16
Torque
to
10 in-lbs
(1.12 N
Sm)
KEY
A
8 mm Hex Key
2
Resistor Stud
14
Fluid Nozzle
14
2
A
0444