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Duron 231-553 Instructions Manual

Series a electric, 120 vac airless paint sprayer
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INSTRUCTIONS–PARTS LIST
ELECTRIC, 120 VAC
Airless Paint Sprayer
2750 psi (195 bar) Maximum Working Pressure
Model 231–553, Series A
Complete sprayer with hoses, gun, RAC IV DripLess
Tip Guard and SwitchTip
GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440–1441
This manual contains important
warnings and information.
READ AND RETAIN FOR REFERENCE
Performance 390
COPYRIGHT 1996, GRACO INC.
Graco Inc. is registered to I.S. EN ISO 9001
308–646
Rev. B
Supercedes Rev. A

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Summary of Contents for Duron DURON 231-553

  • Page 1 This manual contains important warnings and information. READ AND RETAIN FOR REFERENCE ELECTRIC, 120 VAC Performance 390 Airless Paint Sprayer 2750 psi (195 bar) Maximum Working Pressure Model 231–553, Series A Complete sprayer with hoses, gun, RAC IV DripLess Tip Guard and SwitchTip GRACO INC.

  • Page 2: Table Of Contents

    Warnings ........Component Identification and Function Setup .

  • 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 EQUIPMENT MISUSE HAZARD Equipment misuse can cause the equipment to rupture or malfunction and result in serious injury. INSTRUCTIONS 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 your distributor. Do not alter or modify this equipment.

  • Page 5: Component Function And Identification

    Component Function and Identification Fig. 1 Motor Drive Assembly Pressure Adjusting Knob ON/OFF Switch Fluid Outlet Displacement Pump 50 ft (15 m) Main Hose RAC IV Tip Guard FTx Gun RAC IV Switch Tip Pressure Drain Valve Pressure Control Spray Gun Safety Latch DC motor, 120 Vac, 15A, 1 phase Transfers power from DC motor to the displacement pump Controls fluid outlet pressure...

  • Page 6: Setup

    WARNING If you supply your own hoses and spray gun, be sure the hoses are electrically conductive, that the gun has a tip guard, and that each part is rated for at least 2750 psi (195 bar) Working Pressure . This is to reduce the risk of serious injury caused by static sparking, fluid injection or over-pressurization and rupture of the hose or gun.

  • Page 7: Operation

    How to use the gun trigger safety When engaged, the gun safety latch prevents the gun from accidental triggering. See Fig. 3. WARNING INJECTION HAZARD If the gun still sprays when the gun trig- ger safety is locked, repair the gun. See manual 308–235, supplied.
  • Page 8 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 Procedure on page 9. The tip guard alerts you to the risk and helps prevent placing any part of the body close to the spray tip.

  • Page 9: Startup

    WARNING INJECTION HAZARD The system pressure must be manually relieved to prevent the system from starting or spraying accidentally. Fluid under high pressure can be injected through the skin and cause serious injury. To reduce the risk of an injury from injection, splashing fluid, or moving parts, follow the Pressure Relief Procedure whenever you: are instructed to relieve the pressure,...
  • Page 10 WARNING FIRE AND EXPLOSION HAZARD To reduce the risk of static sparking and splashing when priming or flushing the system, hold a metal part of the gun firmly to the side of a grounded metal pail before triggering the gun. 6.
  • Page 11 Startup 1/4 npsm(m) fluid outlet Do not install any shutoff device here Rotate clockwise to increase pressure Shown in closed or spray position Fill 1/3 full with TSL Fig. 9...

  • Page 12: Shutdown And Care

    Shutdown and Care 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. Shutdown and Care 1. Check the packing nut/wet-cup daily (102). Re- lieve pressure first. Keep the wet-cup 1/3 full of TSL at all times to help prevent fluid buildup on the piston rod and premature wear of packings.

  • Page 13: Flushing

    When to Flush 1. Before using a new sprayer: flush out the oil which was left in to protect pump parts. Before using water-base paint: flush with min- eral spirits followed by soapy water, and then a clean water flush. Before using oil-base paint: flush with mineral spirits only.

  • Page 14: Troubleshooting

    INJECTION HAZARD To reduce the risk of serious injury, whenever you are instructed to relieve pressure, follow the Pressure Relief Procedure on page 9. Check everything in the troubleshooting table before disassembling the sprayer. TYPE OF PROBLEM WHAT TO CHECK If check is OK, go to next check Fluid pressure 1.
  • Page 15 Basic Problem Solving TYPE OF PROBLEM WHAT TO CHECK If check is OK, go to next check Electrical 5. Check motor armature commutator for burn (continued) spots, gouges and extreme roughness. Re- move motor cover and brush inspection plates to check. See page 20. 6.
  • Page 16 Intermediate Problem Solving TYPE OF PROBLEM WHAT TO CHECK If check is OK, go to next check Low output 3. Release gun trigger. Observe resting position of (continued) pump rod (107). 4. Check electrical supply with volt meter. Meter should read 105–125VAC. 5.
  • Page 17 Intermediate Problem Solving TYPE OF PROBLEM WHAT TO CHECK If check is OK, go to next check 1. Spray tip worn beyond sprayer pressure capa- Spray Pattern Variations bility. 2. Check transducer (29) for wear or damage. 3. Check pressure control (64) for smooth opera- tion.

  • Page 18: 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 elec- trical continuity. Setup Remove the drive housing. See page 28. 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 19: General Repair Information

    General Repair Information 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. Tool List These are the tools required to service all parts of the sprayer.

  • Page 20: Motor Brushes

    NOTE: Replace brushes when worn to about 0.5 in. (12.5 mm). Always check both brushes. Brush Repair Kit 236–967, which includes spring clip 112–766, is available for motors manufactured by Pacific Scientific. NOTE: Replacement brushes may last only half as long as the original ones.
  • Page 21 9. Test the brushes. a. Remove the pump connecting rod pin (17). See Fig. 18, page 22. b. With the sprayer OFF, turn the pressure con- trol knob fully counterclockwise to minimum pressure. Plug in the sprayer. c. Turn the sprayer ON. Slowly increase the pressure until the motor is at full speed.

  • Page 22: Displacement Pump Repair

    Displacement Pump Repair 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: Packing Repair Kit 235–703 is available. Refer- ence numbers of parts included in the kit are marked with an asterisk, i.e., (121*).
  • Page 23 Displacement Pump Repair Intake valve repair (See Fig. 17) 1. Remove the suction hose. See Step 2, Removing the pump. 2. Unscrew the intake valve (118). Remove the o-ring (119*), ball guide (120), stop pin (122*) and ball (121*) from the valve. 3.
  • Page 24 Displacement Pump Repair 3. Tighten the nut (110) onto the piston valve (108) to 5 in-lb (0.57 N.m). See Fig. 20. NOTE: Note the alignment of the piston (108) to the nut (110). Maintain this alignment through Step 8. 4. Clean all residue from the piston valve threads. Apply one drop of adhesive, supplied, to the threads.
  • Page 25 Displacement Pump Repair 11. Place a new o-ring (116*) firmly in the cylinder groove. See Fig. 22. 12. Coat the piston rod and packings with oil. Carefully slide the assembly into the top of the cylinder (115). See Fig. 22. 13.

  • Page 26: Motor

    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 except where noted. 1. Relieve pressure. 2. Try to stop the pump with the piston rod (107) in its lowest position.

  • Page 27: Motor Start Board

    Motor Start Board 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. 27 for this procedure. 1. Relieve pressure. 2. Remove the junction box screws (56) and lower the junction box (59).

  • Page 28: Drive Housing, Connecting Rod, Crankshaft

    Drive Housing, Connecting Rod, Crankshaft 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: Inspect parts as they are removed. Replace parts that are worn or damaged. 1.
  • Page 29 Drive Housing, Connecting Rod, Crankshaft 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. Fig. 29 REF A...

  • Page 30: Pressure Control

    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. 30 for this procedure. NOTE: The pressure control (64) cannot be repaired or adjusted.

  • 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. NOTE: See Fig. 31 for this procedure. 1. Remove the displacement pump. See page 22. 2.

  • Page 32: 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. Fig. 32 1. Turn the handle (45) to the closed position. Drive out the pin (44). Remove the handle. 2.

  • Page 33: Displacement Pump Parts Drawing And List

    Displacement Pump Parts Drawing and List Model 236–787, Series A Includes items 101 to 127 Part No. Description 187–611 MANIFOLD, pump 176–758 PACKING NUT 103* 176–757 GLAND, female, throat 104* 176–997 V–PACKING, plastic, throat 105* 176–755 V–PACKING, leather, throat 106* 176–754 GLAND, male, throat...

  • Page 34: Sprayer Parts Drawing

    Sprayer Parts Drawing Model 231–553, Series A REF 33 REF 32 OUT- SIDE LABEL INSIDE LABEL Label See detail on page 31 HOSE AND GUN NOT SHOWN IN PROPORTION TO SPRAYER...

  • Page 35: Sprayer Parts List

    Sprayer Parts List Model 231–553, Series A Includes items 3 to 89 as listed below Ref. Part No. Description 236–965 MOTOR KIT Includes items 4a to 4g 100–069 .BALL, sst, 1/4” dia. 111–616 .TERMINAL, flat, 1/4” (f), 18 awg 107–503 .TERMINAL, 3/16”...

  • Page 36: Technical Data

    Technical Data Power Requirements ....1 phase, 15 amp minimum Generator ......Working Pressure Range .

This manual is also suitable for:

Duron 308-646Duron performance 390Performance 390 231-553

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