Graco 222839 Series A, 222907 Series A dimensions Troubleshooting, Problem, Cause, Solution, 308200

Troubleshooting

WARNING

To reduce the risk of serious injury whenever you are instructed to relieve pressure, always follow the Pressure Relief Procedure on page 8.

1.Relieve the pressure.

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

PROBLEM			CAUSE	SOLUTION
Pump fails to operate.			Restricted line or inadequate air supply	Clear*; see Technical Data on pages 24–27.
			Obstructed fluid hose or gun/valve;	Clear*; use a hose with a larger ID.
			fluid hose ID is too small.
			Fluid dried on the displacement rod.	Clean; see Service on pages 12–19.
			Dirty or worn air motor parts.	Clean or repair; see separate air motor manual.
Pump	operates,	but	Restricted line or inadequate air supply.	Clear*; see Technical Data on pages 24–27.
output is low on both
strokes.
			Obstructed fluid hose or gun/valve;	Clear*; use a hose with a larger ID.
			fluid hose ID is too small.
			Bleeder valve is open.	Close.
			Air is leaking into the supply container.	Check wiper plate seal.
			Fluid is too heavy for pump priming.	Use bleeder valve (see page 9); use wiper plate
				with ram or pneumatic elevator cart.
			Worn packings in displacement pump.	Replace packings.
Pump	operates,	but	Fluid too heavy for pump priming.	Use bleeder valve (see page 9); use wiper plate
output is low on down-				with ram or pneumatic elevator cart.
stroke.
			Held open or worn intake valve or seals.	Clear valve; replace seals.
Pump	operates,	but	Held open or worn piston valve or seals.	Clear valve; replace seals.
output is low on up-
stroke.
Erratic	or accelerated		Exhausted fluid supply.	Refill and prime.
pump speed.
			Fluid is too heavy for pump priming.	Use the bleeder valve (see page 9); use wiper
				plate with ram or pneumatic elevator cart.
			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 on page 8. 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 20–40 psi [0.14–0.3 MPa, 1.4–2.8 bar]). If the pump starts when the air is turned on, the obstruc- tion is in the fluid hose or gun.

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

308200 11