Graco Inc 222700, 3500WB, 308584 Installing the Fluid Needle Assembly, PRO 3500sc Gun Conversion

PRO 3500sc Gun Conversion

H

Z P

8*

 *80

28*   *81

20*

Apply a very light coat of lubricant to the o-ring on the outside of the fluid packing rod (28).

Apply dielectric grease to the o-rings (80, 81) and tube (75) threads.

 Apply high strength Loctiter to the air fitting (D) threads. Torque the fitting to 35 to 45 in-lbs (4 to 5.1 NSm).

Fig. 31

L

M

91

*75

*78

*76

*79

*77

N

D

E

F

05164B

Installing the Fluid Needle Assembly

NOTE: The parts marked with an asterisk (*) are included with the conversion kit, part no. 223114.

1.Before installing the new fluid packing rod assem- bly (28*), clean the internal surfaces of the barrel with a soft brush or cloth. Check the inside of the barrel for marks from high voltage arcing. If the marks are present, replace the barrel.

2.Lubricate the o-ring on the outside of the fluid packing rod assembly. Make sure the spring is in- stalled on the fluid packing rod nut.

NOTE: See Fig. 20, page 34, for information on indi- vidual fluid packing rod parts.

3.Install the fluid packing rod assembly (28*) into the gun barrel. See Fig. 31. Using the 9 mm hex nut driver, tighten the assembly until just snug, then check the drag on the fluid rod. The fluid rod packing nut is properly tightened when there is 2 lbs. (9 N) of drag force. Tighten or loosen the packing nut as needed.

4.Install the trigger (L) and tighten the trigger screws (K).

5.Install the electrode needle (20*), fluid nozzle and resistor stud assembly (H) and the air cap assem- bly (P, 8*, Z) as instructed on page 32.

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