Graco 309063F important safety instructions LOW or Fluctuating Output

Troubleshooting

LOW OR FLUCTUATING OUTPUT

TYPE OF PROBLEM	WHAT TO CHECK		WHAT TO DO
		If check is OK, go to next check	When check is not OK refer to this column
Low Output	1.	For worn spray tip.	1.	Follow Pressure Relief Procedure Warn-
				ing, then replace tip. See your separate
				gun or tip manual.
	2.	Verify pump does not continue to stroke when	2.	Service pump. See page 26.
		gun trigger is released.
	3.	Filter clogged (If optional filter is installed).	3.	Relieve pressure. Check and clean filter.
	4.	Prime valve leaking.	4.	Relieve pressure. Repair prime valve.
	5.	Suction hose connections.	5.	Tighten any loose connections.
	6.	Electrical supply with volt meter.	6.	Reset building circuit breaker; replace
		Meter must read:		building fuse. Repair electrical outlet or try
		210--255 Vac for 220--240 Vac models.		another outlet.
		85--130 Vac for 100--120 Vac models. Low volt-
		ages reduce sprayer performance.
	7.	Extension cord size and length; must be at least	7.	Replace with a correct, grounded exten-
		12 gauge wire and no longer than 300 ft. Longer		sion cord.
		cord lengths reduce sprayer performance.
	8.	Leads from motor to pressure control circuit	8.	Be sure male terminal blades are centered
		board (35) for damaged or loose wires or con-		and firmly connected to female terminals.
		nectors. Inspect wiring insulation and terminals		Replace any loose terminal or damaged
		for signs of overheating.		wiring. Securely reconnect terminals.
	9.	For loose motor brush leads and terminals. See	9.	Tighten terminal screws. Replace brushes
		page 12.		if leads are damaged. See page 12.
	10.For worn motor brushes which must be 1/4 in. (6		10. Replace brushes. See page 12.
		mm) minimum. See page 12.
	11. For broken or missing motor brush caps.		11. Replace brushcap if broken. Realign spring
				with brush. See page 12.
	12.Motor brushes for binding in brush holders. See		12.Clean brush holders, remove carbon dust
		page 12.		with small cleaning brush. Align brush lead
				with slot in brush holder to assure free verti-
				cal brush movement.
	13.Low stall pressure.		13. Do either or both:
				a. Turn pressure control knob fully
				clockwise. Make sure pressure
				control knob is properly installed to
				allow full clockwise position.
				b. Try a new transducer.
	14.Motor armature for shorts by using an armature		14.Replace motor. See page 25.
		tester (growler) or perform spin test. See page
		12.

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