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Graco A Series Instructions-Parts List Manual

Electric, 100 vac, 50 or 60 hz, 590st airless paint sprayer, 195 bar maximum working pressure
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INSTRUCTIONS-PARTS LIST
This manual contains important
warnings and information.
READ AND KEEP FOR REFERENCE.
INSTRUCTIONS
ELECTRIC, 100 VAC, 50 or 60 Hz
590 st Airless Paint Sprayer
195 bar Maximum Working Pressure
Model 231–347, Series A
Basic sprayer
GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440–1441
COPYRIGHT 1995, GRACO INC.
308–559
Supersedes Rev A
First choice when
quality counts.
Rev. B
and PCN B

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Summary of Contents for Graco A Series

  • Page 1 READ AND KEEP FOR REFERENCE. quality counts. INSTRUCTIONS ELECTRIC, 100 VAC, 50 or 60 Hz 590 st Airless Paint Sprayer 195 bar Maximum Working Pressure Model 231–347, Series A Basic sprayer GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440–1441 COPYRIGHT 1995, GRACO INC.

  • Page 2: Table Of Contents

    Table of Contents Warnings ........On/Off Switch .

  • Page 3: Warnings

    WARNING WARNING INJECTION HAZARD Spray from the gun, leaks or ruptured components can inject fluid into your body and cause ex- tremely serious injury, including the need for amputation. Fluid splashed in the eyes or on the skin can also cause serious injury. Fluid injected into the skin is a serious injury.
  • Page 4 This equipment is for professional use only. Read all instruction manuals, tags, and labels before operating the equipment. Use the equipment only for its intended purpose. If you are not sure, call Graco Technical Assis- tance at 1–800–543–0339. Do not alter or modify this equipment.
  • Page 5 Major Components Fig. 1 Motor DC motor, 100 Vac, 13A, 1 phase Drive Assembly Transfers power from DC motor to the displacement pump Pressure Adjusting Knob Controls fluid outlet pressure Fluid Filter Filters fluid between source and spray gun Fluid Outlet Hose and spray gun is connected here Displacement Pump Pressurizes fluid to be sprayed through spray gun...

  • Page 6: Setup

    WARNING 4. Fill the wet–cup (102). Pry off the wet–cup seal. Fill the cup 1/3 full with Graco Throat Seal Liquid If you supply your own hoses and spray gun, be (TSL), supplied. Install the seal.
  • Page 7 Setup 1/4 npsm(m): Do not install any shutoff device here Fill 1/3 full with TSL Fig. 3 Operation How to use the pressure drain valve Refer to the IMPORTANT note on page 6. How to use the gun safety latch Use the pressure drain valve (45) to relieve fluid pres- sure from the pump and to help prime the pump.
  • Page 8 Operation How to use the pressure control Clean the front of the tip frequently during the day’s operation. First, follow the Pressure Relief Procedure The pressure control controls the motor operation so on page 9. the sprayer maintains constant fluid pressure at the pump outlet.

  • Page 9: Startup

    Startup Refer to the IMPORTANT note on page 6. NOTE: If this is a first–time startup, flush the sprayer. See page 12. WARNING NOTE: Refer to Fig. 10 and the other figures refer- enced in the text as you start the sprayer. INJECTION HAZARD The system pressure must be manually 1.
  • Page 10 Startup 10. Adjust the spray pattern. Tip guard; shown in vertical position Tip guard: shown in a. Increase the pressure just until spray from the horizontal position gun is completely atomized. To avoid exces- sive overspray and fogging, and to extend tip and sprayer life, always use the lowest pres- sure needed to get the desired results.

  • Page 11: Shutdown And Care

    Shutdown and Care Refer to the IMPORTANT note on page 6. 8. Coil the hose when storing it, even for overnight, to help protect the hose from kinking, abrasion, coupling damage, etc. WARNING WARNING INJECTION HAZARD To reduce the risk of serious injury, INJECTION HAZARD whenever you are instructed to relieve See the warning section INJECTION...

  • Page 12: Flushing

    Flushing How to flush Refer to the IMPORTANT note on page 6. When to flush 1. Follow the Pressure Relief Procedure on page 9. 1. Before using a new sprayer, flush out the oil which was left in to protect pump parts. 2.

  • Page 13: Troubleshooting

    Flushing 7. Lower the pressure setting. Turn on the sprayer. 9. Remove the pump from the pail. Disengage the Maintaining metal–to–metal contact, trigger the gun safety latch. Trigger the gun to force solvent gun into the flushing pail. Slowly increase the from the hose and run the sprayer a few seconds pressure just until the pump operates.
  • Page 14 Troubleshooting Basic Problem Solving (continued) TYPE OF PROBLEM WHAT TO CHECK WHAT TO DO If check is OK, go to next check When check is not OK, refer to this column Mechanical (continued) 2. Check pump connecting rod pin (17). It must be 2.
  • Page 15 Troubleshooting Basic Problem Solving (continued) TYPE OF PROBLEM WHAT TO CHECK WHAT TO DO If check is OK, go to next check When check is not OK, refer to this column Electrical, continued 11. Check ON/OFF switch (52). Disconnect the 11.
  • Page 16 Troubleshooting Intermediate Problem Solving TYPE OF PROBLEM WHAT TO CHECK WHAT TO DO If check is OK, go to next check When check is not OK, refer to this column 6. Check motor brushes. See What To Check, 6. See page 20. item 4, on page 14.
  • Page 17 Troubleshooting Intermediate Problem Solving TYPE OF PROBLEM WHAT TO CHECK WHAT TO DO If check is OK, go to next check When check is not OK, refer to this column 1. Spray tip worn beyond sprayer pressure capa- 1. Replace spray tip. Spray Pattern Variations bility.

  • Page 18: General Repair Information

    General Repair Information Refer to the IMPORTANT note on page 6. 2. When reconnecting the wires, be sure the flat blade of the insulated male connector is centered in the wrap–around blade of the female WARNING connector. INJECTION HAZARD CAUTION To reduce the risk of serious injury, whenever you are instructed to relieve Improper wire routing can result in poor sprayer...

  • Page 19: Motor Test

    Motor Test WARNING INJECTION HAZARD To reduce the risk of serious injury, whenever you are instructed to relieve pressure, follow the Pressure Relief Procedure on page 9. For checking armature, motor winding and brush electrical continuity. Setup 1. Remove the drive housing. See page 28. This is to ensure that any resistance you notice in the arma- ture test is due to the motor and not to worn gears in the drive housing.

  • Page 20: Motor Brush Replacement

    Motor Brush Replacement NOTE: Replace brushes when worn to about 0.5 in. Motor lead; do not disconnect (12.5 mm). Always check both brushes. Brush Repair Minimum 0.5” (12.5 mm) Kit 236–967, which includes spring clip 112–766, is Included in Brush Repair available for motors manufactured by Pacific Scientific.
  • Page 21 Motor Brushes 9. Test the brushes. WARNING a. Remove the pump connecting rod pin (17). MOVING PARTS HAZARD See Fig. 20, page 23. Do not touch the brushes, leads, springs or brush holders while the sprayer is b. With the sprayer OFF, turn the pressure con- plugged in to reduce the risk of electric trol knob fully counterclockwise to minimum shock and serious injury.

  • Page 22: Displacement Pump

    Displacement Pump Intake Valve Repair (See Fig. 19) WARNING 1. Unscrew the intake valve (118) with swivel (82) INJECTION HAZARD attached. Remove the o-ring (119*), ball guide To reduce the risk of serious injury, (120), stop pin (122*) and ball (121*) from the whenever you are instructed to relieve valve.
  • Page 23 Displacement Pump 2. Unscrew the packing nut (102) and plug (123). 3. Use a plastic mallet to tap the piston rod (107) down, and then pull the rod out through the bottom of the cylinder. 4. Remove the throat packings (104*,105*) and glands (103*,106*).
  • Page 24 Displacement Pump Reassembling the pump 7. Place the flats at the top of the rod in a vise. NOTE: Alternate plastic and leather packings. See Fig. 8. Carefully tighten the nut (110) against the piston 21. The lips of the throat V-packings face down, rod to 40 N.m.
  • Page 25 Displacement Pump 12. Coat the piston rod and packings with oil. Carefully 15. Tighten the cylinder jam nut (117) to 98 N.m. See slide the assembly INTO THE TOP OF THE Fig. 24. CYLINDER (115). See Fig. 24. 16. Install the pump. See page 22. 13.
  • Page 26 Motor 6. Turn the displacement pump rod (107) so the pin WARNING hole aligns with the bottom drive housing screw (19). See the DETAIL below. Remove the three INJECTION HAZARD drive housing screws and lockwashers (19,6). To reduce the risk of serious injury, whenever you are instructed to relieve 7.

  • Page 27: On/Off Switch

    Motor Start Board 4. Install the new motor start board. Reconnect all WARNING wires. Mount the junction box. See Fig. 27. INJECTION HAZARD NOTE: Route wires through the gasket (50) before To reduce the risk of serious injury, making connections. whenever you are instructed to relieve pressure, follow the Pressure Relief Procedure on page 9.

  • Page 28: Drive Housing, Connecting Rod, Crankshaft

    Drive Housing, Connecting Rod, Crankshaft 5. Tap the lower rear of the drive housing (11) with a WARNING plastic mallet to loosen the motor. Pull the drive housing straight off the motor. INJECTION HAZARD To reduce the risk of serious injury, 6.
  • Page 29 Drive Housing, Connecting Rod, Crankshaft Torque to 9 N.m DETAIL REF A 01068 34 (x 3) Fig. 28 03181...

  • Page 30: Pressure Control

    Pressure Control 8. Install the front cover (13). Connect the harness WARNING (A) to the motor start board (47). INJECTION HAZARD 9. Install the junction box. Be sure no leads are To reduce the risk of serious injury, pinched against the motor or by the motor start whenever you are instructed to relieve board.

  • Page 31: Pressure Transducer

    Pressure Transducer WARNING INJECTION HAZARD To reduce the risk of serious injury, whenever you are instructed to relieve pressure, follow the Pressure Relief Procedure on page 9. 1. Remove the displacement pump. See page 22. 2. Use a pull–twist motion to remove the transducer (29) from the pump manifold (101).

  • Page 32: Drain Valve

    Drain Valve WARNING INJECTION HAZARD To reduce the risk of serious injury, whenever you are instructed to relieve pressure, follow the Pressure Relief Procedure on page 9. Apply thread sealant (42e) Apply grease to face of base 1. Turn the handle (45) to the closed position. Drive Handle shown in closed position out the pin (44).

  • Page 33: Displacement Pump Parts

    Displacement Pump Parts Model 235–699, Series A Includes items 101 to 126 Part No. Description Qty. 103* 187–611 MANIFOLD, pump 176–758 NUT, packing 176–757* GLAND, female. throat 176–997* V–PACKING, plastic, throat 109* *105 176–755* V–PACKING, leather, throat 176–754* GLAND, male. throat 104* 235–709 ROD, displacement...

  • Page 34: Complete Sprayer Parts

    Complete Sprayer Parts LABEL REF 32 LABEL REF 33 SEE DETAIL ON PAGE 33 35,14 LABELS REF 24 LABEL...
  • Page 35 Complete Sprayer Parts Model 231–347, Series A 186–620* LABEL, ground terminal 110–037 SCREW, mach, pnhd, 10–24 x 5/8” Includes items 3 to 85 as listed below 187–963 GASKET, junction box 236–524 FILTER, power inlet 107–262 TERMINAL, 1/4” F, 18 AWG Ref.

  • Page 36: Technical Data

    Graco distributor to the original purchaser for use. With the exception of any special extended or limited warranty published by Graco, Graco will, for a period of twelve months from the date of sale, repair or replace any part of the equipment determined by Graco to be defective.

This manual is also suitable for:

231–347

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