Graco Inc 307-638, 218-026, PRO4000 manual Gun Disassembly, Electrode Replacement

SERVICE

Gun￿ Disassembly	3￿	Install￿ the￿ new￿ electrode￿ ￿￿2￿￿ with￿ the￿ wrench￿ ￿59c￿
6WARNING5		supplied￿￿ Do￿ not￿ overtighten￿
Installing￿ and￿ servicing￿ this￿ equipment￿ requires		CAUTION
access￿ to￿ parts￿ which￿ may￿ cause￿ electric￿ shock
or￿ other￿ serious￿ bodily￿ injury￿ if￿ the￿ work￿ is￿ not￿ per4 To￿ avoid￿ damaging￿ the￿ plastic￿ threads￿￿ be￿ very
formed￿ properly￿￿ Do￿ not￿ install￿ or￿ service￿ this		careful￿ when￿ installing￿ the￿ electrode￿
equipment￿ unless￿ you￿ are￿ trained￿ and￿ qualified￿	4￿	Reinstall￿ fluid￿ nozzle￿ and￿ air￿ cap￿ assembly￿ as
Follow￿ thePressure￿ ￿ Relief￿ Procedure￿ Warning,
		described￿ inClean￿	￿ the￿ Air￿ Cap￿ and￿ Fluid￿￿Nozzle
page￿ 9￿￿ before￿ servicing￿ the￿ gun￿ or￿ any￿ part￿ of￿ the
system￿￿ Disconnect￿ the￿ fluid￿ hose￿ from￿ the￿ gun￿

KEY

45Fluid￿ Needle￿ Shaft￿ Assembly

59c Wrench 59c

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

CAUTION

If￿ the￿ plastic￿ parts￿ of￿ the￿ gun￿ must￿ be￿ held￿ se4 45 curely￿￿ ALWAYS￿ clamp￿ them￿ in￿ padded￿ vice￿ jaws

to￿ prevent￿ damage￿ to￿ the￿ parts￿

ALWAYS￿ lubricate￿ o￿rings￿ and￿ seals￿ with￿ petro4 leum￿ jelly￿

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

Flush￿ the￿ gun￿ as￿ described￿ underFlush￿￿ the￿ Spray

Gun.￿ Follow￿ thePressure￿ ￿ Relief￿ Procedure￿ Warning

on￿ page￿ 9￿￿ Disconnect￿ the￿ air￿ and￿ fluid￿ line￿ from￿ the￿gun￿

Electrode￿ Replacement

￿￿Remove￿ the￿ air￿ cap￿ assembly￿ and￿ fluid￿ nozzle￿ as￿ de4 scribed￿ inClean￿ ￿ the￿ Air￿ Cap￿ and￿ Fluid￿￿Nozzle

Fig￿ 10

2￿ Unscrew￿ and￿ remove￿ the￿ electrode￿ ￿￿2￿￿ with￿ the wrench￿ ￿59c￿￿ supplied￿￿ See￿ Fig￿ ￿￿￿￿ If￿ the￿ needle shaft￿ assembly￿ ￿45￿￿ turns￿ while￿ trying￿ to￿ loosen￿ the electrode￿￿ hold￿ the￿ needle￿ shaft￿ assembly￿ nut￿ with￿ a small￿ wrench￿

18 307-638