Graco 308-017 warranty Troubleshooting Chart, Problem Cause Solution

TROUBLESHOOTING CHART

PROBLEM		CAUSE	SOLUTION
Pump fails to operate		Restricted line or inadequate air supply	Clear; see TECHNICAL DATA on pages 24-29.
		Obstructed fluid hose or gun/valve;	Open, clear*; use hose with larger ID.
		fluid hose ID is too small
		Fluid dried on the displacement rod	Clean; always stop pump at bottom of stroke;
			keep wet-cup 1/3 filled with compatible solvent.
		Dirty, worn, or damaged motor parts	Clean or repair; see air motor manual, supplied.
Pump operates, but	out-	Restricted line or inadequate air supply	Clear; see TECHNICAL DATA on pages 24-29.
put low on both strokes
		Obstructed fluid hose or gun/valve;	Open, clear*; use hose with larger ID.
		fluid hose ID is too small
		Bleeder valve open	Close.
		Air leaking into supply container	Check wiper plate or ram plate seal.
		Fluid too heavy for pump priming	Use bleeder valve (see page 6).
			Use inductor or ram.
			Remove piston spacer (33).**
		Worn packings in displacement pump	Replace packings.
Pump operates, but	out-	Fluid too heavy for pump priming	Use bleeder valve (see page 6).
put low on downstroke			Use inductor or ram.
			Remove piston spacer (33).**
		Held open or worn intake valve or seals	Clear valve; replace seals.
Pump operates, but	out-	Held open or worn piston valve or seals	Clear valve; replace seals.
put low on upstroke
Erratic or accelerated		Exhausted fluid supply	Refill and prime.
pump speed
		Fluid too heavy for pump priming	Use bleeder valve (see page 6).
			Use inductor or ram.
			Remove piston spacer (33).**
		Held open or worn piston valve or seals	Clear valve; replace seals.
		Held open or worn priming piston	Clear; service.
		Worn packings in displacement pump	Replace packings.

*To determine if the fluid hose or gun is obstructed, follow the Pressure Relief Procedure Warning below. Disconnect the fluid hose and place a container at the pump fluid outlet to catch any fluid. Turn on the air just enough to start the pump (about 1.4-2.8 bar [20-40 psi]).. If the pump starts when the air is turned on, the obstruction is in the fluid hose or gun.

**Remove the piston spacer (33) only as a last resort, as the pump may not perform well without it.

NOTE: If you experience air motor icing, call Graco Technical Assistance (1-800-543-0339).

WARNING

Pressure Relief Procedure
To reduce the risk of serious bodily injury, including fluid injec-	5. Hold a metal part of the gun/valve firmly to the side of a
tion, splashing in the eyes or on the skin, or injury from mov-	grounded metal pail, and trigger the gun/valve to relieve
ing parts, always follow this procedure whenever you shut off	pressure.
the pump, when checking or servicing any part of the spray/	6. Engage the gun/valve safety latch.
dispensing system, when installing, cleaning or changing	7. Open the drain valve (required in your system) and/or the
spray tips/nozzles, and whenever you stop spraying/dis-
	pump bleeder valve, having a container ready to catch
pensing.
	the drainage.
1. Engage the spray gun/dispensing valve safety latch.	8. Leave the drain valve open until you are ready to spray/
	dispense again.
2. Shut off the air to the pump.	If you suspect that the spray tip/nozzle or hose is completely
3. Close the bleed-type master air valve (required in your	clogged, or that pressure has not been fully relieved after fol-
	lowing the steps above, VERY SLOWLY loosen the tip guard
system).
	retaining nut or hose end coupling and relieve pressure
4. Disengage the gun/valve safety latch.	gradually, then loosen completely. Now clear the tip or hose.

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