SERVICE

Gun Disassembly

WARNING

Installing and servicing this equipment requires access to parts which may cause electric shock or other serious bodily injury if the work is not per- formed properly. Do not install or service this equipment unless you are trained and qualified.

Follow the Pressure Relief Procedure Warning, page 9, before servicing the gun or any part of the system. Disconnect the fluid hose from the gun.

NOTE: Check all possible remedies in the Troubleshooting Charts before disassembling the gun.

CAUTION

If the plastic parts of the gun must be held se- curely, ALWAYS clamp them in padded vice jaws to prevent damage to the parts.

ALWAYS lubricate o±rings and seals with petro- leum jelly.

ALWAYS remove gun from worksite for service or repair. Service or repair area must be clean.

Flush the gun as described under Flush the Spray Gun. Follow the Pressure Relief Procedure Warning on page 9. Disconnect the air and fluid line from the gun.

Gun Assembly Note

Whenever you are tightening plastic parts where there is no torque specified in the instructions, tighten the parts finger-tight and then retighten with a wrench 1/4 to 1/2 turn.

Electrode Replacement

1.Remove the air cap assembly and fluid nozzle as de- scribed in To Clean or Change Air Cap and Fluid Nozzle.

2.Unscrew and remove the electrode (14) with the wrench (66c) supplied. See Fig 10. If the needle shaft assembly (9) turns while trying to loosen the elec- trode, hold the needle shaft assembly nut with a small wrench.

3.Install the new electrode (14) with the wrench (66c). Do not over tighten.

CAUTION

To avoid damaging the plastic threads, be very careful when installing the electrode.

4.Reinstall fluid nozzle and air cap assembly as described in To Clean or Change Air Cap and Fluid Nozzle.

KEY

9Fluid Needle Shaft Assembly

66c Wrench

66c

9

Fig 10

￿8 ￿￿￿￿￿￿￿

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Image 18
Graco Inc 307-712, PRO 5000, 218-745 manual Service, Gun Disassembly, Gun Assembly Note, Electrode Replacement