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Graco 231-575 Instructions Manual

395st airless paint sprayer
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INSTRUCTIONS-PARTS LIST
This manual contains important
warnings and information.
READ AND KEEP FOR REFERENCE.
INSTRUCTIONS
ELECTRIC, 120 VAC
395 st Airless Paint Sprayer
3000 psi (210 bar , 21 MPa) Maximum Working Pressure
Model 231–575, Series A
Standard mount; complete sprayer with hose, gun,
RAC IV DripLess
Tip Guard and SwitchTip
GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440–1441
COPYRIGHT 1997, GRACO INC.
Graco Inc. is registered to I.S. EN ISO 9001
308–714
Rev. A

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Summary of Contents for Graco 231-575

  • Page 1 3000 psi (210 bar , 21 MPa) Maximum Working Pressure Model 231–575, Series A Standard mount; complete sprayer with hose, gun, RAC IV DripLess Tip Guard and SwitchTip GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440–1441 COPYRIGHT 1997, GRACO INC. Graco Inc. is registered to I.S. EN ISO 9001...

  • Page 2: Table Of Contents

    ........Graco Warranty and Disclaimers .

  • Page 3: Warnings

    WARNING INJECTION HAZARD Spray from the gun, leaks or ruptured components can inject fluid into your body and cause extremely 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. Use only genuine Graco parts.

  • Page 5: Component Identification And Function

    Component Identification and Function Model 231–575 Shown Fig. 1 Motor DC motor, 120 Vac, 15A, 1 phase Drive Assembly Transfers power from DC motor to the displacement pump Pressure Adjusting Knob Controls fluid outlet pressure ON/OFF Switch Power switch that controls 120 Vac power to sprayer Fluid Outlet Hose and spray gun is connected here Displacement Pump...

  • Page 6: Setup

    Setup 2. Fill the wet–cup (102). Pry off the wet-cup seal. WARNING Fill the cup 1/3 full with Graco Throat Seal Liquid (TSL), supplied. Install the wet-cup seal. If you supply your own hoses and spray gun, be sure the hoses are electrically conductive, that the 3.

  • Page 7: Operation

    Setup Grounding Grounded Outlets WARNING Improper installation or alteration of the grounding Grounding Prong plug will result in a risk of electric shock, fire or Fig. 3 explosion that could cause serious injury or death. 2. Do not alter the ground prong or use an adapter. 1.
  • Page 8 Operation How to use the RAC IV tip guard. WARNING INJECTION HAZARD To reduce the risk of serious injury, whenever you are instructed to relieve pressure, follow the Pressure Relief Tip handle shown in Procedure on page 9. spraying position. Turn handle 180 , The tip guard alerts you to the risk and helps prevent trigger gun to clear clog...

  • Page 9: Startup

    Startup NOTE: Refer to Fig. 2 and the other figures referenced WARNING in the text as you start the sprayer. INJECTION HAZARD 1. Open the pressure drain valve (42). See Fig. 8. The system pressure must be manually relieved to prevent the system from 2.
  • Page 10 Startup b. If more coverage is needed, use a larger tip WARNING rather than increasing the pressure. FIRE AND EXPLOSION HAZARD To reduce the risk of static sparking and c. Adjust the direction of the spray pattern. See splashing when priming or flushing the Fig.

  • Page 11: Shutdown And Care

    Shutdown and Care WARNING WARNING INJECTION HAZARD INJECTION HAZARD See the warning section INJECTION To reduce the risk of serious injury, HAZARD on page 3 for information on whenever you are instructed to relieve the hazard of using damaged hoses. pressure, follow the Pressure Relief Procedure on page 9.

  • Page 12: Flushing

    Flushing When to Flush 3. Pour one-half gallon (2 liters) of compatible solvent into a grounded metal flushing pail. Put the suction 1. Before using a new sprayer: flush out the oil hose in the pail. which was left in to protect pump parts. 4.

  • Page 13: Troubleshooting

    Troubleshooting WARNING INJECTION HAZARD To reduce the risk of serious injury, whenever you are instructed to relieve pressure, follow the Pres- sure Relief Procedure on page 9. Basic Problem Solving Check everything in the troubleshooting table before disassembling the sprayer. TYPE OF PROBLEM WHAT TO CHECK WHAT TO DO...
  • Page 14 Basic 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 Electrical 5. Check motor armature commutator for burn 5. Remove motor and have motor shop (continued) spots, gouges and extreme roughness.
  • Page 15 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 Low output 3. Release gun trigger. Observe resting position of 3. If pump consistently comes to rest with (continued) pump rod (107).
  • Page 16 Intermediate Problem Solving TYPE OF PROBLEM WHAT TO CHECK WHAT TO DO When check is not OK, refer to this column If check is OK, go to next check 1. Spray tip worn beyond sprayer pressure capa- 1. Replace spray tip. Spray Pattern Variations bility.

  • Page 17: 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 Remove the drive housing. See page 24. This is to ensure that any resistance you notice in the armature test is due to the motor and not to worn gears in the drive housing.

  • Page 18: General Repair Information

    General Repair Information WARNING WARNING INJECTION HAZARD HOT SURFACE HAZARD To reduce the risk of serious injury, During operation, the motor and drive whenever you are instructed to relieve housing become very hot and could burn pressure, follow the Pressure Relief your skin if touched.

  • Page 19: Motor Brush

    Motor Brushes 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 available for motors manufactured by Pacific Scientific. Included in Brush Repair Kit 236–967 NOTE: Replacement brushes may last only half as...
  • Page 20 Motor Brushes 9. Test the brushes. WARNING a. Remove the pump connecting rod pin (17). See Fig. 18, page 21. MOVING PARTS HAZARD Do not touch the brushes, leads, springs b. With the sprayer OFF, turn the pressure con- or brush holders while the sprayer is trol knob fully counterclockwise to minimum plugged in to reduce the risk of electric pressure.
  • Page 21 (121*). For the best leakage, but no tighter. Fill the packing nut/wet-cup results, use all the new parts in the kit, even if the old 1/3 full with Graco TSL. Push the plug (123) into ones still look good. the wet-cup.
  • Page 22 Motor 9. Align the new motor with the base and reinstall the WARNING screws (46). INJECTION HAZARD 10. Assemble the drive housing to the motor. Follow To reduce the risk of serious injury, steps 8 to 10 on page 24. whenever you are instructed to relieve 11.

  • Page 23: Motor Start Board

    Motor Start Board 5. Install the new cord (50) in the reverse order of disassembly. 6. Install the junction box. Be sure no leads are WARNING pinched against the motor or by the motor start board. Also be sure the gasket (89) is installed. INJECTION HAZARD To reduce the risk of serious injury, On/Off Switch...

  • Page 24: Drive Housing, Connecting Rod, Crankshaft

    Drive Housing, Connecting Rod, Crankshaft WARNING CAUTION INJECTION HAZARD Do not allow the gear (16) to fall; it may stay at- To reduce the risk of serious injury, tached to the drive housing or to the motor. whenever you are instructed to relieve Do not lose the thrust balls (11a or 4a) or let them fall pressure, follow the Pressure Relief between the gears, which will damage the drive hous-...
  • Page 25 Drive Housing, Connecting Rod, Crankshaft REF A Torque to 80 in–lb (9 N.m) Quantity of three Quantity of one Apply a total of 3 fl. oz.(29 cc) of grease to gears. Note: Filter not shown 02815 Fig. 24...

  • Page 26: Pressure Control

    Pressure Control 7. Loosely install the screws (63) and then torque WARNING them to 21 in–lb (2.4 N.m). INJECTION HAZARD 8. Install the front cover (13). Connect the harness To reduce the risk of serious injury, (A) to the motor start board (47). whenever you are instructed to relieve 9.

  • Page 27: 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. NOTE: See Fig. 26 for this procedure. 1. Remove the displacement pump. See page 21. 2.

  • Page 28: Drain Valve

    Drain Valve Repair WARNING 1. Unscrew the spring retainer from the valve body. INJECTION HAZARD Remove the spring, washers and stem/ball. Clean To reduce the risk of serious injury, any debris from the ball or seat area. whenever you are instructed to relieve 2.
  • Page 29 Sprayer Parts Drawing Model 231–575, Series A Label See detail on page 30 REF 33 REF 32 OUTSIDE LABEL INSIDE LABEL...
  • Page 30 Sprayer Parts List Model 231–575, Series A Includes items 3 to 89 as listed below Ref. Ref. Part No. Description Qty. Part No. Description Qty. 111–700 GRIP, handle 110–110 . SEALANT, pipe (not shown) 236–965 MOTOR KIT 224–807 BASE, valve Includes items 4a to 4g 111–600 PIN, grooved, 3/32 x 1”...

  • Page 31: Technical Data

    ......... . 3/4 hp Order the labels directly from Graco, free of charge: Cycles/Gallon (liter) .
  • Page 32 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.

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A series

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