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INSTRUCTIONS-PARTS LIST
This manual contains important
warnings and information.
READ AND KEEP FOR REFERENCE.
INSTRUCTIONS
ELECTRIC, 230 VAC, 50 Hz
395st Airless Paint Sprayer
207 bar (20.7 MPa, 3000 psi) Maximum Working Pressure
Model 231421, 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
308746
Rev. E
7411A
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Summary of Contents for Graco 231421
- Page 1 Model 231421, Series A Standard mount; complete sprayer with hose, gun, RAC IV DripLess Tip Guard and SwitchTip 7411A GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440–1441 COPYRIGHT 1997, GRACO INC. Graco Inc. is registered to I.S. EN ISO 9001...
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Page 2: Table Of Contents
........Model 231421 Sprayer Parts Drawing . -
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 Do not use hoses to pull equipment. Route hoses away from traffic areas, sharp edges, moving parts, and hot surfaces. Do not expose Graco hoses to temperatures above 82 C (180 F) or below –40 C (–40 F). Do not lift pressurized equipment.
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Page 5: Component Identification And Function
Component Identification and Function Model 231421 Shown 7157A Fig. 1 Motor DC motor, 230 VAC, 50 Hz, 3.8A, 1 phase Drive Assembly Transfers power from DC motor to the displacement pump Pressure Adjusting Knob Controls fluid outlet pressure ON/OFF Switch... -
Page 6: Setup
3. Fill the wet–cup (102). Pry off the wet-cup seal. gun has a tip guard, and that each part is rated for Fill the cup 1/3 full with Graco Throat Seal Liquid at least 207 bar (20.7 MPa, 3000 psi) Working (TSL), supplied. - Page 7 Setup 1/4 npsm(m) fluid outlet Do not install any shutof f device here Rotate clockwise to increase pressure Shown in closed or spray position Fill 1/3 full with TSL Model 231421 Shown 7157A Fig. 4...
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Page 8: Operation
Operation How to use the gun trigger safety Open or drain, position When engaged, the gun safety latch prevents the gun Closed, or spray position from accidental triggering. See Fig. 5. WARNING INJECTION HAZARD If the gun still sprays when the gun trigger safety is locked, repair the gun. - Page 9 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 10. spraying position. Turn handle 180 , The tip guard alerts you to the risk and helps prevent trigger gun to clear clog...
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Page 10: Startup
Startup NOTE: Refer to Fig. 4 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. 9. The system pressure must be manually relieved to prevent the system from 2. - Page 11 Startup b. If more coverage is needed, use a larger tip WARNING rather than increasing the pressure. FIRE AND EXPLOSION HAZARD c. Adjust the direction of the spray pattern. See To reduce the risk of static sparking and Fig. 10. Engage the gun safety latch. Loosen splashing when priming or flushing the the retaining nut (A).
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Page 12: Shutdown And Care
Shutdown and Care 8. Coil the hose and hang it on a hose rack when WARNING storing it, even for overnight, to help protect the hose from kinking, abrasion, coupling damage, etc. INJECTION HAZARD To reduce the risk of serious injury, WARNING whenever you are instructed to relieve pressure, follow the Pressure Relief... -
Page 13: 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 14: 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 10. Basic Problem Solving Check everything in the troubleshooting table before disassembling the sprayer. TYPE OF PROBLEM WHAT TO CHECK WHAT TO DO... - Page 15 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 16 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 17 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.
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Page 18: 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 10. For checking armature, motor winding and brush electrical continuity. Setup Remove the drive housing. See page 25. 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 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 20: Motor Brushes
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 236967, which includes spring clip 112766, is available for motors manufactured by Pacific Scientific. Included in Brush Repair Kit 236967 NOTE: Replacement brushes may last only half as... - Page 21 Motor Brushes 9. Test the brushes. WARNING a. Remove the pump connecting rod pin (17). See Fig. 19, page 22. 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.
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Page 22: Displacement Pump Repair
(121*). For the best results, use leakage, but no tighter. Fill the packing nut/wet-cup all the new parts in the kit, even if the old ones still look 1/3 full with Graco TSL. Push the plug (123) into good. the wet-cup. -
Page 23: Motor
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 25. whenever you are instructed to relieve 11. -
Page 24: Motor Start Board
Motor Start Board 6. Install the junction box. Be sure no leads are pinched against the motor or by the motor start board. Also be sure the gasket (50) is installed. WARNING On/Off Switch INJECTION HAZARD To reduce the risk of serious injury, whenever you are instructed to relieve NOTE: See Fig. -
Page 25: 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 26 Drive Housing, Connecting Rod, Crankshaft REF A Torque to 21 in–lb (2.4 N.m) Quantity of three Quantity of one Apply a total of 3 fl. oz.(89 cc) of grease to gears. Note: Filter not shown 02815 Fig. 25...
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Page 27: 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 28: Pressure Transducer
Pressure Transducer 6. Align the holes in the transducer as shown by the WARNING arrows in Fig. 27. INJECTION HAZARD 7. Install the displacement pump. See page 22. To reduce the risk of serious injury, whenever you are instructed to relieve pressure, follow the Pressure Relief Procedure on page 10. -
Page 29: Drain Valve
FLUID HOPPER INSTALLATION KIT 235576 placement of these labels for good visibility. Includes fittings and mounting hardware to replace the Order the labels directly from Graco, free of charge: suction hose assembly with a 2 or 5 liter hopper, 1–800–328–0211 Apply other purchased separately. -
Page 30: Sprayer Parts Drawing
Sprayer Parts Drawing Model 231421, Series A Label See detail on page 31 REF 33 REF 32 OUTSIDE LABEL INSIDE LABEL 7159B... -
Page 31: Sprayer Parts List
Sprayer Parts List Model 231421, Series A Part No. Description Part No. Description 105658 LOCKING RING 187791 LABEL, DANGER, English 105659 BOOT, switch 111700 GRIP, handle 111703 SCREW, filh, 10–24 x 3” MOTOR KIT Includes 4a to 4e 238066 POWER CORD with IEC–320 Connector... -
Page 32: Technical Data
Graco’s written recommendations. This warranty does not cover, and Graco shall not be liable for general wear and tear , or any malfunction, damage or wear caused by faulty installation, misapplication, abrasion, corrosion, inadequate or improper maintenance, negligence, accident, tampering, or substitution of non-Graco component parts.