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Graco PRO 247936 - page 1
Instr uctions Manual Electr ostatic PR O ™ Xs W aterborne Air Spra y Gun Smar t Model 247937 Standard Model 247936 #5 3 312900C ENG For use with conductive spray material s (waterborne and other materials less than 1 megohm-cm). For professional use ONL Y . For use in Class I, Di v . I hazar dous locations using Group D spra y materials. For use ...
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Graco PRO 247936 - page 2
2 312900C T ab le of Contents W arnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 W ar ning Sym bol . . . . . . . . . . . . . . . . . . . . . . . . . 3 Notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 How the Electrosta ...
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Graco PRO 247936 - page 3
Warnings 312900C 3 Wa r n i n g s W arning Symbol This symbol aler ts you to t he possibility of serious injur y or death if y ou do not f ollow the instructions. Notice The f ollowing wa r nings are fo r the setup, use, grounding, mainten ance, and repair of this equipment . The exclama- tion point symbol ale r ts y ou to a general w ar ning and t ...
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Graco PRO 247936 - page 4
Warnings 4 312900C W ARNING W ARNING W ARNING W ARNING EQUIPMENT MISUSE HAZARD Misuse can cause death or serious injur y . • Do not opera te the unit when f atigued or under the influe nce of dr ugs or alcohol. • Do not e xceed the maximum w or king pressure or te mperature ratin g of the lowest r ated system com- ponent. See Te c h n i c a l D ...
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Graco PRO 247936 - page 5
Overview 312900C 5 Overview How the Electr ostatic Air Spray Gun W orks The air hose su pplies air to the spra y gun. P ar t of the air operat es the turbine and the rest of the air atomiz es the fluid being sp ra yed. The turbine generates power , which is conv er ted b y the pow er car tridge to supply high v olt- age current to the gun’ s ex t ...
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Graco PRO 247936 - page 6
Overview 6 312900C A. Air swivel inlet. Left-hand thread. B. Fluid inlet. C. T urbine air e xhaust. D. Air cap and nozzle. See page 13 for siz es. E. Fluid needle. Shuts off fluid flo w and provides a ground point. ti1254a A ti1254a B ti1254a C ti1255a D ti1256 a E ...
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Graco PRO 247936 - page 7
Overview 312900C 7 F. Fluid adjustment va lve . Adjusts fluid needle trav el. Use only in low flo w cond itions, to reduce needle wear . G. Fan air adjustment v alve . Adjusts f an size and shape. H. Atomizing air restrictor v alve . Restr icts atomizing air flow . Replace with pl ug (included) if desired. I. ES ON/OFF switch. T ur ns electrostatic ...
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Graco PRO 247936 - page 8
Overview 8 312900C J. ES indicator (247936 only). Green when ES is ON (I). K. V oltage (247937 onl y). Shows v oltage and current. Green/yello w=spra y , red=see Electrical T roub leshooting , page 22. NO T E: Nor mal current dra w f o r this model is higher and the yello w current bar will be lit. L. ES HI/LO switc h (247937 only). Sets v oltage t ...
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Graco PRO 247936 - page 9
Installation 312900C 9 Installation Install the System F IG . 1. shows a typical e lectrostatic ai r spra y sys tem. It is not an actual system des ign. F or assistance in designing a system to suit y our par ticular needs, contact yo ur Graco distributor . W arning Sign Mount warning signs in the spr ay area whe re they can easily be seen and read ...
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Graco PRO 247936 - page 10
Installation 10 312900C Fig. 1. Typica l Installation Key a b‡ c‡ d ‡e f g h k m n o ‡r s u‡ v w c‡ g q‡ t p l j‡ ES ON/OFF valve: I is ON, O is OFF ti12721 ti1498ax a Main Air Supply L ine b‡ V entilation F an Interlock Soleno id V alv e c‡ Main Air Supply Shutoff V alve (b leed-type) d Pump Air Line Filt er/W ater Separator e? ...
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Graco PRO 247936 - page 11
Installation 312900C 11 Connect the Air Line 1. Connect the Gr aco Grounded Air Supply Hose (R) between th e air supply line and the gun's air inlet (V) (F IG . 2). The gun air inlet f itting has a left-hand thread. Con nect the air supply hose ground wire (Q) to a true ear th ground . 2. Install an air line filter/w ater separator (O) on the ...
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Graco PRO 247936 - page 12
Installation 12 312900C Connect the Exhaust T ube Press the e xhaust tube (38) on to the barbed adap ter on the bottom of th e gun handle. Secure the tube with the clamp (39) (F IG . 5). Connect the Fluid Line 1. Bef ore connecting the fluid line ( N), blo w it out with air and flush it with solvent. Use solv ent compatible with the fluid to be spr ...
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Graco PRO 247936 - page 13
Installation 312900C 13 Select a Fluid Nozzle and Air Cap The gun is supplied with P ar t No. 1972 66 Nozzle and 24A276 Air Cap. If you require a different size, ref er to T able 1 and T ab le 2 , and instr uction manual 309 419, or consult with your Graco dist ributor . See Replace Air Cap/Nozzle on page 28. A wide pattern kit (P/N 24A43 1) is inc ...
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Graco PRO 247936 - page 14
Installation 14 312900C Gr ounding The follo wing are minimum groundin g requirem ents for a basic elect rostatic syste m. Y our sys tem may include other equipment or objects which m ust be grounded. Check yo u r local electr ical code f or de tailed grounding instru ctions. Y our system must be connected to a true ear th ground . • Pump: ground ...
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Graco PRO 247936 - page 15
Installation 312900C 15 Chec k Electrical Grounding 1. Hav e a qu alified electr ician check the ele ctrical groundin g continuity of t he spra y gun and air hose . 2. T urn the ES ON/O FF valv e OFF . 3. T ur n off the air and fluid supply to the gu n. The fluid hose must not have any fluid in it. 4. Make sure the groun ded air hose (R) is connec ...
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Graco PRO 247936 - page 16
Installation 16 312900C Chec k Fluid Viscosity T o chec k fluid viscosity you will need: • a viscosity cup • a stopw atch. 1. Completely submerge the viscosity cup in th e fluid. Lift the cup out q uickly , star ting the stopwat ch as soon as the cup is completely remo ved. 2. W atc h the stream of fluid co ming from the bott om of the cup . As ...
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Graco PRO 247936 - page 17
Installation 312900C 17 7. Set gun air r egulator to deliver minimum 40 psi (0 .28 MP a, 2.8 bar) at gun when tr iggered, f or maximum transf er efficiency . See tab le at right. 8. Spra y test patter n. Check atomiza tion. If over-atomi- zation occurs at minimum pressure, adjust rest rictor v alve. If atomization is inadequate , increase air press ...
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Graco PRO 247936 - page 18
Installation 18 312900C Flush 1. T ur n ES ON/OFF swi tch OFF (O). 2. Relie ve pr essure, page 19. 3. Change fluid source to solv ent, or disconnect fluid line and connect solv ent supply line to gun. 4. P oint gun into grounded metal pa il. Flush until clean solvent flo ws from gun. 5. Relie ve pressure , page 19. 6. Hang gun from hook. Nozzle m u ...
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Graco PRO 247936 - page 19
Pressure Relief 312900C 19 Pressure Relief 1. T urn the ES ON/O FF valv e OFF . 2. T ur n off the air b leed valv es to the fluid source an d to the gun. 3. T r igger the gun into a g rounded metal wa ste con- tainer to reliev e the fluid press ure. 4. Open the pump dr ain v alve, ha ving a waste co n- tainer ready to catc h the drainage . Leav e t ...
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Graco PRO 247936 - page 20
Maintenance 20 312900C Maintenance Clean Gun Daily 1. Flush, p age 18. 2. a. Clean outside of gun with non-conductiv e, compatib le solvent. P oint gun down. b . Use soft, damp clo th. c. Do not immerse gun. 3. Remove air cap . 4. Clean air cap , retaining ring, and nozzle with soft brush and non-conductiv e, compatib le solvent. 5. Clean probe wit ...
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Graco PRO 247936 - page 21
Maintenance 312900C 21 Daily System Care 1. Relie ve pr essure, page 19. 2. Clean fluid and air filt ers. 3. Chec k for flui d leaks. Tighten all fitt ings. 4. Clean wor kpiece h angers. Use non- spark ing tools. 5. Chec k mov ement of trigger (T) and v alves (V). Lubricate if necessar y . ti1934 ti1291a ti1300a T V ti12658 ...
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Graco PRO 247936 - page 22
Electrical Troubleshooting 22 312900C Electrical T roub leshooting NO TE: Chec k all possible rem edies in the T roub leshoot- ing Char t bef ore disassembling the gu n. * ES indicator light is off when the gun is triggered. Electric Shoc k Hazard Installing and ser vicing th is equipment requires access to par ts which ma y cause an electric shock ...
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Graco PRO 247936 - page 23
Electrical Tests 312900C 23 Electrical T ests Electrical components inside the gun affect p erformance and safety . The follo win g procedur es test the co ndition of the po wer supply (18), barrel (16) and chargi ng probe (31), and elect rical cont inuity between components. Use megohmmeter P ar t No. 24 1079 (AA) and an applied v oltage of 500 V ...
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Graco PRO 247936 - page 24
Electrical Tests 24 312900C T est P ower Suppl y Resistance 1. Remov e the power su pply (18), page 31. 2. Remov e the turbine alternator (19) from the po wer supply , page 32. 3. Measure resist ance from the po wer supply's ground strips (EE) to the condu ctive cont act in the center of the pow er supply seal (FF). See F IG . 11. 4. The resis ...
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Graco PRO 247936 - page 25
Spray Pattern Troubleshooting 312900C 25 Spra y P attern T r oubleshooting NO TE: Chec k all possible rem edies in the T roub leshoot- ing Char t be f ore disa ssembling the gun. NO TE: Some spr ay pattern problem s are caused by the improper balance be tween air and fluid. Electric Shoc k Hazard Installing and ser vicing th is equipment requires a ...
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Graco PRO 247936 - page 26
Gun Operation Tro ubleshooting 26 312900C Gun Operation T roub leshooting NO TE: Chec k all possible rem edies in the T roub leshoot- ing Char t bef ore disassembling the gu n . Electric Shoc k Hazard Installing and ser vicing th is equipment requires access to par ts which ma y cause an electric shock or other serious injur y if the work is not pe ...
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Graco PRO 247936 - page 27
Gun Repair 312900C 27 Gun Repair Prepare the Gun f or Repair • Check all possible remedies in Gun Oper ation T roubleshoo ting before disassemb ling the gun. • Use a vise with padded ja ws to prev ent damage to plastic par ts. • Lubricate the pow er supply seal (18a), some pac k- ing rod par ts (26), and cer ta in fluid fittings w ith dielect ...
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Graco PRO 247936 - page 28
Gun Repair 28 312900C Replace Air Cap/Nozzle 1. Prepare gu n f or re pair page 27. 2. Remove probe. 3. Remove the retaining r ing (27) and air cap (9 ). See F IG . 13. 4. P oint gun up and squeez e tr igger while remo ving the fluid nozzle (7) assembly with the m ulti-tool (37). Fig. 13. Replace Air Cap/Nozzle Use non-silicon e grease, Part No. 111 ...
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Graco PRO 247936 - page 29
Gun Repair 312900C 29 Remo ve Fluid P acking 1. Prepare t he gun f or repair , page 27. 2. Remov e the air cap and fluid nozzle, page 28. 3. Remove the fluid needle, page 28. 4. Loosen the trigger scre ws (8) and trigger (30). See F IG . 14. 5. Remove the pac king ro d (26), using the multi-too l (37). 6. Chec k all par ts for wear or damage and re ...
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Graco PRO 247936 - page 30
Gun Repair 30 312900C Repair P ac king Rod Y ou ma y replace the packing rod as individual par ts or as an assemb ly . The assembly is pre- adjusted at the f actor y . Befor e installing the fluid pack ing rod into the gun barrel, make sure the interna l surfaces of the barrel are clean. Remove any residue with a soft brush or cl oth. Check the ins ...
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Graco PRO 247936 - page 31
Gun Repair 312900C 31 Remo ve Barrel 1. Prepare t he gun f or repair , page 27. 2. Carefully loosen the n ut (54) from the bra cket fluid fitting (13) . Pull the tube (14 or 50a) out of th e fitting. Mak e sure both f err ules and the n ut stay with the tube. 3. Loosen the th ree screws (11). 4. Hold the gun ha ndle (17) with one hand and pull the ...
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Graco PRO 247936 - page 32
Gun Repair 32 312900C Remo ve and Replace P ower Suppl y • Inspect the gun handle power supply ca vity f or dir t or moisture. Clean w ith a clean, dr y rag. • Do not e xpose gaske t (10) to solvent s. 1. Prepare gun for service, page 27. 2. Remov e the barrel (16), page 31. 3. Grasp th e power supply (1 8) with your hand. With a gentle side to ...
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Graco PRO 247936 - page 33
Gun Repair 312900C 33 Remo ve and Replace T urbine Alternator Replace turbine alter nator bearings after 2000 hour s of operation. Or der P ar t No. 223688 Bearing Kit. 1. Prepare gu n f or repa ir , pa ge 27. 2. Remov e the power supp ly/alter nator assemb ly , page 32. 3. Disconnect the al ter nator from the po wer supply , page 32. 4. Measure re ...
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Graco PRO 247936 - page 34
Gun Repair 34 312900C Repair Fluid Adjustment V alve 1. Prepare the gun for re pair , page 27. 2. Remove the fluid adjustmen t valv e (25). It can only be replaced as a complete assembly . See F IG . 20.. 3. Scre w the valv e (25) into the gun handle. T orque to 15-25 in-lb (1 .7-2.8 N•m). Fig. 20. Fluid Adjustment Valve Repair Air V alve 1. Prep ...
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Graco PRO 247936 - page 35
Gun Repair 312900C 35 Remo ve and Replace Atomizing Air Restrictor V alve 1. Prepare t he gun f or repair , page 27. 2. Remove the atomizing air restricto r valv e (23). Inspect the o-ring (23c*). Rep lace if necessar y . See F IG . 22. 3. Install a new atomizing air restr ictor valv e (23), or disassemb le and replace par ts individually . The v a ...
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Graco PRO 247936 - page 36
Parts 36 312900C Pa r t s P ar t No. 247936 60 kV Electr ostatic Gun, Series A (Standa rd model) See page 38 f or detail vie ws of the alter nator (19), f an adjustment v alve (20), ES ON/ OFF valv e (22), and pac king rod (26). 27 30 10* 1 60 31 26 29 7 9 27a* 7a 7b 11 18 18a 8 20 25 15 21 24 14 19 6* 23 35 13 16 ti11932 4 54 24a* 32 55 53 3 22 Re ...
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Graco PRO 247936 - page 37
Parts 312900C 37 P ar t No. 247937 60 kV Electrostat ic Gun, Series A (Smart model) See page 38 f or detail vie ws of the alter nator (19), f an adjustment v alve (20), ES ON/ OFF valv e (22), and pac king rod (26). 27 30 10* 1 60 31 26 29 7 9 27a* 7a 7b 11 18 18a 8 22 20 25 15 21 24 14 19 6* 23 35 13 16 ti12659 4 54 24a* 32 55 59 53 2 3 5 58 56 57 ...
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Graco PRO 247936 - page 38
Parts 38 312900C MAX FLUID WPR: 100 PSI (7bar, 0.7 Mpa) MAX AIR WPR: 100 PSI (7bar, 0.7 Mpa) To avoid shock or explosion •Use properly grounded air hose •Read instruction manual I O ES MAX FLUID WPR: 100 PSI (7bar, 0.7 Mpa) 100 % KV M a 0 HI LO ES I O ES MAX AIR WPR: 100 PSI (7bar, 0.7 Mpa) Ref. No. 26: P acking Rod 26h† 26f† 26c† 26d† ...
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Graco PRO 247936 - page 39
Parts 312900C 39 P ar t No. 247936 60 kV Electr ostatic Gun, Series A (Standa rd model) P ar t No. 247937 60 kV Electrostat ic Gun, Series A (Smart model) Ref. No. P ar t No. Description Qty 1 111157 FITTING, tube, fluid 1 2 197967 PLUG, handle 1 3 198058 SCREW , cap, soc ket head 1 4 185111 SPRING, compression 1 5 111450 P A CKING, o-r ing (247937 ...
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Graco PRO 247936 - page 40
Parts 40 312900C * Included in Air Seal Repair Kit 244781. † Included in Fluid Seal Repair Kit 244 911. ❖ Rubber seal is not remov able . ▲ Replacement W ar ning labels, signs , tags, and cards are a vailab le at no cost. 26 24A331 NEEDLE; includes 26a-26h 1 26a 24A330 . NEEDLE, assembly 1 26b 185495 . HOUSING, packing 1 26c † 178763 . P A ...
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Graco PRO 247936 - page 41
Accessories 312900C 41 Accessories Air Line Accessories AirFlex ™ Flex ible Groun ded Air Hose 100 psi (7 bar , 0.7 MP a) Maximum W orking Pressure 0.315 in. (8 mm) I D; 1/4 npsm(f) x 1/4 npsm(f) left -hand thread 244963 6 ft (1.8 m) 244964 15 ft (4.6 m) 244965 25 ft (7.6 m) 244966 36 ft (11 m) 244967 50 ft (15 m) 244968 75 ft (23 m) 244969 100 f ...
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Graco PRO 247936 - page 42
Accessories 42 312900C Gun Accessories Gun Repair Kits 244781 Air Seal Repair Kit 244911 Fluid Seal Repair Kit Push/Pull Fan Air V alve 244912 F or quic k change of f an size. ES Alwa ys On Kit 244913 Replaces inlet fitting with ball v alve to shut off air during flushi ng. Conv er ts ES ON/OFF valv e to alwa ys ON conditio n. Handle Grips 245263 M ...
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Graco PRO 247936 - page 43
Technical Data 312900C 43 Te c h n i c a l D a t a Category Data Maximum Working Flu id Pressure ....... ................ ............. 100 psi (0 .7 MP a, 7 bar) Maximum Working Air P ressure ................ ................ ........ 100 psi (0.7 MPa, 7 bar) Maximum Fluid Ope rating T emperature ........... ................ . 120 ° F (49 ° C) M ...
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Graco PRO 247936 - page 44
All written and visual data contained in this document reflects the latest product information available at the time of publica tion. Graco reserves the right to make changes a t any time without notice. This manual contains English. MM 312900 Graco Headquarters: Minneapolis International Offices: Belgium, China, Japan, Korea GRACO INC. P.O. BOX 14 ...
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