Graco 237010, 220667, 220666, 237012, 220663, 237008, 237013, 237011, 220664 Repairing the Pilot Valve

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Service

Repairing the Pilot Valve

NOTE: Air Valve and Pilot Valve Repair Kit 220656 is available. See page 38 to order. Parts included in the kit are marked with an asterisk, for example, (5j*). Use all the parts in the kit for the best results.

Disassembly

1.Relieve the pressure.

WARNING

PRESSURIZED EQUIPMENT HAZARD

To reduce the risk of a serious injury whenever you are instructed to relieve pressure, follow the Pres- sure Relief Procedure on page 10.

2.Unscrew the valve cap (5c) from each of the valve housings (5d) and remove the parts. Clean and inspect the parts for damage. See Fig. 9.

3.To replace the rod seal (5j*):

a.Cut a small slit in the tube ends (72* and 42*) and disconnect them from the pilot valve fit- tings (5h) and air valve tees (40n).

b.Unscrew the cap screws (37) and remove the pilot valve housings (5d). Grease the rod seals (5j*) and install one on each side of the pump.

c.Secure the pilot valve housings (5d) to the pump with the cap screws (37).

d.Connect the new tubes (72* and 42*) to the pilot valve fittings (5h) and air valve tees (40n).

Assembly

1.Apply lithium base grease to the inside and outside of the air valve (5b), and to the o-rings and seals.

2.Install the o-ring (5e*), being sure to completely seat it on the flat in the valve housing (5d). Install the long end of the valve stem (5a) into the hous- ing.

3.Install the small spring (5g) over the valve stem (5a), the air valve (5b) over the spring, and the larger spring over the air valve.

4.With the copper gasket (5i*) in place on the valve cap (5c), screw the cap onto each of the valve housings (5d). Torque the cap to 7.4 to 12.5 ft-lb (10 to 17 NSm).

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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 Lines Connect the Fluid Suction LineConnect the Air Lines Ventilate the Air ExhaustApplies only when using a spray gun or dispensing valve Pressure Relief ProcedureStart and Adjust the Pump OperationPressurized Equipment Hazard Troubleshooting Symptom Probable Cause Test Procedure RemedyTroubleshooting Flush the Pump With Compatible Solvent MaintenanceCheck and Service the Lubricator, Regula- tor, and Filter 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 220663 only For pump Model 237008 only52*51 7326 For pump Model 220666 only For pump Model 237011 onlyParts For pump Model 220664 only For pump Model 237009 only5026 For pump Model 220667 only For pump Model 237012 only02334 For pump Model 220665 only For pump Model 237010 only02335 For pump Model 220668 only For pump Model 237013 onlyRef No Air Control Valve Ref No Pilot Valve Repair and Conversion Kits 220948 SEAT, carbide 108822 Repair and Conversion Kits Filter, Regulator, Lubricator Kit Filter, Regulator, Lubricator FRL KitReturn Tube Kit Drum Cover Kit and Return Tube KitDrum Cover Kit Return TubeSuction Kit Suction KitModel 220663 Technical Data, 400 Series PumpsPerformance Chart, 400 Series Pumps Model 220666Model 220664 Technical Data, 1200 Series PumpsPerformance Chart, 1200 Series Pumps Model 220667Model 220665 Technical Data, 2500 Series PumpsPerformance Chart, 2500 Series Pumps Model 220668Dimensional Drawing Mounting Hole LayoutGraco Standard Warranty Graco Information