Graco Inc 222700, 3500WB, 308584 manual Electrode Needle Replacement, Service

Service

Electrode Needle Replacement

1.Prepare the gun for service as instructed on page 30.

2.Remove the air cap, nozzle and resistor stud as instructed on page 30.

3.Unscrew and remove the electrode needle (20) with the multi-tool (62). See Fig. 18. Be careful not to damage the contact wire. If the fluid rod turns, hold the back end of the fluid rod (E) by placing a screw driver blade into the slot on the shaft, near the trigger.

4.Apply low-strength (purple) Loctiter or equivalent thread sealant to the fluid rod threads.

Hold the back end of the fluid rod (E) to prevent it from turning while installing the new electrode needle (20) finger-tight. Do not over-tighten the electrode needle.

CAUTION

To avoid damaging the plastic threads or contact wire, be very careful when installing the electrode needle.

5.Install the fluid nozzle and resistor stud assembly and the air cap assembly as instructed on page 31.

6.Test the gun resistance as instructed on page 28.

Apply low-strength (purple) Loctite or equivalent to the fluid rod threads, then install the electrode needle (20).

62

 20

E

05155A

Fig. 18

32 308584