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INSTRUCTIONS-PARTS LIST
This manual contains important
warnings and information.
READ AND KEEP FOR REFERENCE.
INSTRUCTIONS
ELECTRIC, 120 VAC
Pro 501st Airless Paint Sprayer
2750 psi (19.0 MPa, 190 bar) Maximum Working Pressure
Model 231–299, Series B
Complete sprayer with hose, gun, Rac IV DripLess
Tip Guard and SwitchTip .
GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440–1441
http://www.graco.com
COPYRIGHT 1994, GRACO INC.
Graco Inc. is registered to I.S. EN ISO 9001
308–256
Rev. D
Supersedes Rev. B
and PCN C
02821A
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Summary of Contents for Graco Fuller O'brien Paints Pro 501st Series
- Page 1 Model 231–299, Series B Complete sprayer with hose, gun, Rac IV DripLess Tip Guard and SwitchTip . 02821A GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440–1441 http://www.graco.com COPYRIGHT 1994, GRACO INC. Graco Inc. is registered to I.S. EN ISO 9001...
- Page 2 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 Graco distributor. Do not alter or modify this equipment. Use only genuine Graco parts Check equipment daily.
- Page 3 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 may look like just a cut, but it is a serious injury.
- Page 4 WARNING FIRE AND EXPLOSION HAZARD Improper grounding, poor ventilation, open flames or sparks can cause a hazardous condition and re- sult in a fire or explosion and serious injury. If there is any static sparking or you feel an electric shock while using this equipment, stop spray- ing immediately.
- Page 5 Notes...
- Page 6 2. Fill the wet-cup (102). Pry off the wet-cup seal. at least 2750 psi (19.5 MPa, 195 bar) Working Fill the cup 1/3 full with Graco Throat Seal Liquid Pressure. This is to reduce the risk of serious injury (TSL), supplied. Install the wet-cup seal.
- Page 7 Setup 5. Ground the sprayer and spray system. e. Fluid supply container: according to local code. All solvent pails used when flushing , according WARNING to local code. Use only metal pails, which are conductive. Do not place the pail on a non- To reduce the risk of static sparking, ground the conductive surface, such as paper or card- pump and all other equipment used or located in...
- Page 8 Operation The tip guard alerts you to the risk and helps prevent WARNING placing any part of the body close to the spray tip. The tip guard also adjusts the vertical or horizontal spray INJECTION HAZARD pattern. See page 10. The tip guard holds a reversing To reduce the risk of serious injury, spray tip.
- Page 9 Startup Pressure Relief Procedure 1. Open the pressure drain valve (42). 2. Do not install the spray tip until the pump is WARNING primed. INJECTION HAZARD 3. Put the suction hose (32) into the paint. If you The system pressure must be manually are pumping from a pail, push the drain hose (33) relieved to prevent the system from down below the top of the pail to avoid splashing...
- Page 10 Setup 8. Check all fluid connections for leaks. Relieve the NOTE: Spray patterns will change as tips wear. pressure before tightening any connections. Change the spray tip if adjusting the pressure will not improve the spray pattern. 9. Install the spray tip. Lock the gun trigger safety first.
- Page 11 Shutdown and Care 7. For very short shutoff periods, leave the suction WARNING hose in the paint, relieve the pressure, and clean the spray tip. INJECTION HAZARD To reduce the risk of serious injury, 8. Coil the hose when storing it, even for overnight, whenever you are instructed to relieve to help protect the hose from kinking, abrasion, pressure, follow the Pressure Relief...
- Page 12 Flushing 3. Pour one-half gallon (2 liters) of compatible solvent WARNING into a grounded metal flushing pail. Put the suction hose in the pail. INJECTION HAZARD To reduce the risk of serious injury, 4. Open the pressure drain valve. See Fig. 3, page 7. whenever you are instructed to relieve pressure, follow the Pressure Relief 5.
- Page 13 Troubleshooting 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. Check everything in the chart before disassembling the sprayer. Basic Problem Solving Check everything in the guide 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 If check is OK, go to next check When check is not OK, refer to this column 1. Spray tip worn beyond sprayer pressure 1. Replace spray tip. Spray pattern variations capability.
- Page 17 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 26. 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 3. Route wire carefully through the drive housing WARNING and motor. Avoid pinching the wires between the junction box and the motor or pressure control. INJECTION HAZARD To reduce the risk of serious injury, whenever you are instructed to relieve CAUTION pressure, follow the Pressure Relief Procedure on page 9.
- Page 19 Motor Brushes a. Remove the pump connecting rod pin (17). WARNING See Fig. 18, page 20. INJECTION HAZARD b. With the sprayer OFF, turn the pressure con- To reduce the risk of serious injury, trol knob fully counterclockwise to minimum whenever you are instructed to relieve pressure.
- Page 20 Fill the packing nut/wet-cup pressure, follow the Pressure Relief 1/4 full with Graco TSL. Push the plug (123) into Procedure on page 9. the wet-cup. Removing the Pump (See Fig. 17) 1.
- Page 21 Displacement Pump Repair NOTE: Packing Repair Kit 235–703 is available. 1. Check the outside of the piston rod (107) and the Reference numbers of parts included in the kit are inside of the cylinder (115) for wear. Replace worn marked with an asterisk i.e., (121*). For the best parts to ensure a good seal with the new packings.
- Page 22 Displacement Pump Repair 9. Stack these parts one at a time into the top of the Torque to manifold (101): the male gland (106*), alternately three plastic packings (104*) with two leather Apply one drop of packings (105*), and then the female gland (103*). sealant to these *109 See Fig.
- Page 23 Displacement Pump Repair 11. Place a new o-ring (116*) firmly in the cylinder groove. See Fig. 24. 12. Coat the piston rod and packings with oil. Carefully slide the assembly into the top of the cylinder (115). See Fig. 24. 13.
- Page 24 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 11 on page 26. whenever you are instructed to relieve pressure, follow the Pressure Relief 11.
- Page 25 4. Loosen the strain relief bushing (51). Remove the WARNING power supply cord (50). INJECTION HAZARD 5. Install the new cord (50) in the reverse order of To reduce the risk of serious injury, disassembly. whenever you are instructed to relieve pressure, follow the Pressure Relief 6.
- Page 26 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 pressure, follow the Pressure Relief fall between the gears, which will damage the drive...
- Page 27 Drive Housing, Connecting Rod, Crankshaft REF A Torque to 80 in–lb (9 N.m) Quantity of 3. Fig. 30 1075...
- Page 28 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 pressure, follow the Pressure Relief Procedure on page 9.
- Page 29 Pressure Transducer 7. Install the displacement pump. See page 20. 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. 32 for this procedure. 1.
- Page 30 Suction Hose WARNING CAUTION INJECTION HAZARD Misalignment or cross-threading will damage the To reduce the risk of serious injury, parts and/or create shavings which can cause the whenever you are instructed to relieve o-ring (27) to leak. pressure, follow the Pressure Relief Procedure on page 9.
- Page 31 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 pressure, follow the Pressure Relief 2.
- Page 32 Parts – Displacement Pump Model 236–787, Series A Includes items 101–127 Ref. Part No. Description Qty. 187–611 MANIFOLD, pump 176–758 PACKING NUT 103* 176–757 GLAND, female, throat *103 104* 176–997 V-PACKING, plastic, throat 105* 176–755 V-PACKING, leather, throat 105* 106* 176–754 GLAND, male, throat 187–613...
- Page 33 Parts – Complete Sprayer Model 231–299, Series B HOSE AND GUN NOT SHOWN IN PROPORTION TO SPRAYER Label See detail on page 31 REF 32 REF 33 OUT- SIDE Ref 35 LABEL LABEL INSIDE LABEL 02820A...
- Page 34 Parts – Complete Sprayer Model 231–299, Series B Ref. Part No. Description Qty. Includes items 3–89 187–615 . SEAT, drain valve Ref. 224–968 . STEM, drain valve Part No. Description Qty. 168–110 . O-RING, stem 111–700 GRIP, handle 110–110 . SEALANT, pipe (not shown) 224–807 BASE, valve 237–664...
- Page 35 Technical Data Power Requirements ....120 VAC, 60 HZm Pump Inlet Size ......1/2 npt(f) 1 phase, 15 amp minimum Fluid Outlet Size...
- Page 36 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.