Graco 308149P important safety instructions Troubleshooting, Cause, Solution

Troubleshooting

WARNING

To reduce the risk of serious injury whenever you are instructed to relieve pressure, always follow the Pressure Relief Procedure on page 12.

1.Relieve the pressure.

2.Check all possible causes and problems before disassembling the pump.

PROBLEM	CAUSE	SOLUTION
Pump fails to operate	Restricted line or inadequate air/hydraulic	Clear; increase air/hydraulic supply.
	supply; closed or clogged valves	Check that valves are open.
	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 separate motor manual.
Pump operates, but out-	Restricted line or inadequate air/hydraulic	Clear; increase air/hydraulic supply.
put low on both strokes	supply; closed or clogged valves	Check that valves are open.
	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 ram plate seal.
	Fluid too heavy for pump priming	Use bleeder valve (see pages 12 and 14); use ram.
	Worn packings in displacement pump	Replace packings.
Pump operates, but out-	Fluid too heavy for pump priming	Use bleeder valve (see pages 12 and 14); use ram.
put low on downstroke
	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 pages 12 and 14); use ram.
	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, relieve the pressure. Disconnect the fluid hose and place a container at the pump fluid outlet to catch any fluid. Turn on the air/hydraulic power just enough to start the pump. If the pump starts when the air/hydraulic power is turned on, the obstruction is in the fluid hose or gun.

NOTE:If you experience air motor icing, contact your Graco distributor.

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