Graco 220666, 220667, 237012, 220663, 237008, 237013, 237011, 220664, 237009, 220665 Troubleshooting

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Troubleshooting

SYMPTOM

PROBABLE CAUSE

TEST PROCEDURE

REMEDY

3. Pump runs but	a.	Air in fluid line
does not main-
tain constant
pressure	b.	Air line too small
	b.	Air line too small
	c.	Obstructed or worn ball
		(57) and seat (49)
	d.	Worn fluid piston (17)
		and/or piston seal (13)

a.Check for spitting at fluid line outlet

c.Pump fast cycles on one end of stroke indicates that side is by- passing

d.Pump fast cycles on one end of stroke indicates that side is by- passing

a.Bleed fluid line until con- stant flow is

obtained

b.Install larger air line, minimum size 1/2 in.

c.Remove, clean, and in- spect seat, ball, and ball guide (56). Replace if worn. See page 15.

d.Replace piston and/or seal. See page 16.

e.Air control valve mufflers (38) plugged

f.Air control valve dirty or worn

e.Check for slow air flow at muffler

e.Remove and clean muf- flers

f.Repair or replace air control valve. See page 20.

g.	Lack of lubrication	g.	Pump reacts slowly
h.	Dirty air passages	h.	Check for sluggish air
			control valve operation

g.Adjust lubricator

h.Clean air passages; do not enlarge orifices. Empty air line filter and/ or control valve filter (40q). See step 5 in Dis- assembly on page 20.

4. Paint dripping	a. Ruptured bellows seal	a. Check for presence of
externally	(14)	paint around piston
around piston		shaft (15)
rod

a.Replace bellows seal. See page 16. Be sure to suction feed, not pressure feed, pump. Maximum fluid inlet pressure is 15 psi (104 kPa, 1.04 bar)

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Contents Series Pumps Instructions-Parts ListElectro-polished for use with waterborne coatings Table of Contents Skin Injection Hazard Equipment Misuse Hazard Fire and Explosion Hazard Mounting the Pump InstallationGeneral Information Grounding Connect the Fluid Suction Line Connect the Fluid LinesVentilate the Air Exhaust Connect the Air LinesStart and Adjust the Pump Pressure Relief ProcedureApplies only when using a spray gun or dispensing valve OperationPressurized Equipment Hazard Symptom Probable Cause Test Procedure Remedy TroubleshootingTroubleshooting Check and Service the Lubricator, Regula- tor, and Filter MaintenanceFlush the Pump With Compatible Solvent Tighten Threaded ConnectionsRepairing the Ball Check Valves ServiceRepairing the Fluid Piston and Seal Service 46 or Repairing the Air Motor and Piston 02327 Repairing the Air Control Valve 40c 40h 40f 40g 40b 40n Repairing the Pilot Valve 72 5h Parts For pump Model 237008 only For pump Model 220663 only52*51 7326 For pump Model 237011 only For pump Model 220666 onlyParts For pump Model 237009 only For pump Model 220664 only5026 For pump Model 237012 only For pump Model 220667 only02334 For pump Model 237010 only For pump Model 220665 only02335 For pump Model 237013 only For pump Model 220668 onlyRef No Air Control Valve Ref No Pilot Valve Repair and Conversion Kits 220948 SEAT, carbide 108822 Repair and Conversion Kits Filter, Regulator, Lubricator FRL Kit Filter, Regulator, Lubricator KitDrum Cover Kit Drum Cover Kit and Return Tube KitReturn Tube Kit Return TubeSuction Kit Suction KitPerformance Chart, 400 Series Pumps Technical Data, 400 Series PumpsModel 220663 Model 220666Performance Chart, 1200 Series Pumps Technical Data, 1200 Series PumpsModel 220664 Model 220667Performance Chart, 2500 Series Pumps Technical Data, 2500 Series PumpsModel 220665 Model 220668Mounting Hole Layout Dimensional DrawingGraco Information Graco Standard Warranty