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

KEY

6, 16, 43

D Contact Ring

2Resistor Stud

6, 16,

 

 

43

Air Cap Assembly

12

9

Retaining Ring

12

O-Ring

 

14Fluid Nozzle

28

Electrode

9

31

O-Ring

 

48

Nozzle

 

 

Wrench

 

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

28

48

14

2 D

31

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.

To 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 NSm).

 

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

 

 

0443

 

 

 

14

Torque to

KEY

 

 

10 in-lbs

A

8 mm Hex Key

 

(1.12 NSm)

2

Resistor Stud

 

2

14

Fluid Nozzle

A

Fig 16

0444

 

308-084￿ ￿ ￿ ￿ ￿ 19

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Graco Inc 308-084, 4600SC, 235893, 235-894, 224-224 Air Cap/Nozzle/Resistor Stud Replacement, To install the resistor stud

308-084, 4600SC, 224-094, 235-894, 235893 specifications

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