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Manual Graco Inc. 02748

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  • Graco Inc. 02748 - page 1

    308–341 Rev . G Supersedes F First choice when quality counts.  02748 INSTRUCTIONS-P ARTS LIST INSTRUCTIONS This manual contains important warnings and information. READ AND KEEP FOR REFERENCE. Optimiser 2K  HVLP T wo Component Adhesive Spray Gun 100 psi (7 bar) Maximum Working Fluid and Air Pressure This gun is for use with water-based con ...

  • Graco Inc. 02748 - page 2

       T able of Contents W arnings 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Selection Chart 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air Flow and Atomizing Pressure 5 . . . . . . . . . . . . . . . . . Installation 6 . . . . . . . . . . . ...

  • Graco Inc. 02748 - page 3

      W ARNING PRESSURIZED EQUIPMENT HAZARD Spray from the gun, hose leaks or ruptured components can splash fluid in the eyes or on the skin and cause serious injury .  Do not stop or deflect fluid leaks with your hand, body , glove or rag.  Follow the Pressure Relief Procedure on page 7 when ...

  • Graco Inc. 02748 - page 4

       Selection Chart Includes: Needle/ Nozzle/Air Cap Kit P/N Needle Assembly P/N Air Cap P/N Nozzle P/N Replacement Needle T ip P/N Orifice Size 949–276 238–703 185–794 185–756 191–564 0.020” (0.508 mm) 949–277 238–703 185–794 185–757 191–564 0.026” (0.660 mm) 949–278 23 ...

  • Graco Inc. 02748 - page 5

    308-341 5 Air Flow and Atomizing Pressure NOTE: All tests completed with the fan air fully open. Air Flow 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 15 25 35 45 55 65 75 85 95 AIR FLOW (scfm) GUN AIR INLET PRESSURE (psi) Atomizing Pressure V ersus Activator Inlet Pressure Air flowing through the gun creates back pressu ...

  • Graco Inc. 02748 - page 6

    6  308-341 Installation KEY A Optimiser 2K Spray Gun B Air Inlet; 1/4 npsm C Air Hose Recommend 5/16” (7.9 mm) ID hose; Optional 3/8” (9.5 mm) ID hose D Gun Air Shut-of f V alve E Gun Air Regulator F Air Filter G Air Supply Line H Pressure Pot Air Shut-of f V alve J Pressure Pot Air Regulator K Activator Pressure P ...

  • Graco Inc. 02748 - page 7

    308-341 7 Installation Air Line Accessories  The gun air line must have an air regulator (E) to control air pressure to the gun. See Fig. 1.  If the gun air source does not have a filter , install a filter (F) on the gun air line to ensure a dry , clean air supply .  T o eliminate the need to shut of f the air ...

  • Graco Inc. 02748 - page 8

       Setup and Shutdown Removing and Installing the Fluid Nozzle Follow this procedure whenever you remove and install a fluid nozzle. See page 4 to select a nozzle or needle/nozzle/air cap kit. 1. Follow the Pressure Relief Procedure on page 7. 2. Remove the air cap ring (12), air cap (19), and a ...

  • Graco Inc. 02748 - page 9

    308-341 9 Setup and Shutdown W ARNING EQUIPMENT MISUSE HAZARD This gun is for use with water-based contact adhe- sives only . Any other use of the gun could cause unsafe operating conditions or damage to the gun. 1. Connect the air line. A. Connect the air hose (C) to the gun air inlet (B). See Fig. 6. C B 02751 Fig. 6 ...

  • Graco Inc. 02748 - page 10

        Setup and Shutdown 4. Connect the activator tube. A. Connect the fitting (V) and tube (M) to the gun activator inlet. See Fig. 10. B. Connect the other end of the fluid tube (M) to a regulated fluid supply line or a pressure tank. Fig. 10 02784 V M 5. Position the Air Cap for a vertical o ...

  • Graco Inc. 02748 - page 11

       Setup and Shutdown 6. Adjust the spray pattern. (continued) C. Hold the gun parallel to the floor and adjust the adhesive fluid pressure until you have a 1 to 6 inch (25.4 to 152.4 mm) straight fluid stream before the stream falls of f. See Fig. 14. 02754 1–6 in. (25.4–152.4 mm) straig ...

  • Graco Inc. 02748 - page 12

        Setup and Shutdown 6. Adjust the spray pattern. (continued) F. Set the gun air supply pressure at 40 psi (2.8 bar), using the gun atomizing air regulator (E). See Fig. 18. NOTE:  Use the fluid manufacturer recommendations if available and refer to the Atomizing Pressure V ersus Activat ...

  • Graco Inc. 02748 - page 13

       Ratio Check NOTE: Y ou cannot sample the adhesive and activator at the same time. The adhesive must be checked with the atomizing air of f, while the activator must be checked with the atomizing air on. 1. Check the ratio of the adhesive. A. Weigh an empty beaker . B. Close the atomizing a ...

  • Graco Inc. 02748 - page 14

        Daily Gun Care, Flushing, and Cleaning CAUTION  Do not point the gun up while cleaning it as this may allow fluid to enter the gun air passages.  Do not use metal tools to clean the air cap holes as this may scratch them and distort the spray pattern.  Do not immerse the gun.  ...

  • Graco Inc. 02748 - page 15

    308-341 1 5 Daily Gun Care, Flushing, and Cleaning 3. Clean the gun. (continued) B. Disconnect the air supply line (C). See Fig. 24. 02800 C Fig. 24 C. Remove the air cap ring (12), air cap (19), air cap seal (47), and fluid nozzle (20) as instructed on page 8. 02757A 35 20 12, 19 47 Fig. 25 D. Soak the air cap ring (1 ...

  • Graco Inc. 02748 - page 16

    1 6  308-341 Daily Gun Care, Flushing, and Cleaning 3. Clean the gun. (continued) G. Install the fluid nozzle (20) air cap seal (47), air cap ring (12), and air cap (19) as instructed on page 8. H. Dampen a soft cloth with soapy water; squeeze out the excess water . Point the gun down and wipe of f the outside of it. F ...

  • Graco Inc. 02748 - page 17

    308-341 1 7 T roubleshooting PROBLEM CAUSE SOLUTION Fluid flow is fluttering while spraying 1. Fluid nozzle is not tight enough 2. Fluid filter is clogged 3. Fluid adjustment knob is not properly set 4. Baffle (item 1 1) is installed wrong or damaged 1. See page 8 to install the fluid nozzle correctly 2. Check the flui ...

  • Graco Inc. 02748 - page 18

        Service Items Needed for Service  Gun W rench – provided  Seal Installation T ool – provided  Adjustable W rench  Screw Driver  Part No. 1 1 1–265 Lubricant  Soap and water NOTE: Gun Repair Kit 949–285 is available; see page 25. The following procedure covers the ...

  • Graco Inc. 02748 - page 19

    308-341 1 9 Service 10. Use the threaded end of the fluid needle (21) to push out the u-cup seal (33). See Fig. 33. Fig. 33 21 02760 11 . Remove and disassemble the activator valve (49). See Fig. 34. Use the threaded end of the activator needle (49d) to push out the needle packings (49g and 49r). Do not bend the end of ...

  • Graco Inc. 02748 - page 20

        Service Assemble NOTE: See Fig. 34, page 19, for the parts that need to be lubricated. 1. Insert the fluid needle (21) through the front of the gun as shown in Fig. 35. Install the new packing assembly (39) by placing them on the end of the needle tip. Orientate the packings as shown in F ...

  • Graco Inc. 02748 - page 21

       Service 6. Slide the new air valve (14) onto the fluid needle (21) until it is against the nut (B). See Fig. 38. 7. Install the fluid needle (21) and air valve (14) into the back of the gun. 02764 Fig. 38 21 14 B 8. T ighten the packing adjustment nut (31) with the gun wrench (35) until yo ...

  • Graco Inc. 02748 - page 22

        Service 13. Install the spring (15) and fluid adjustment nut (6). T ighten the nut to 25 to 35 in-lbs (2.8 to 4.0 N  m). See Fig. 42. 14. Install the spring (16) and fluid adjustment knob (8). 15. Re-assemble the activator valve assembly . See Fig. 42. a. Make sure the thin end of the ...

  • Graco Inc. 02748 - page 23

       Service 12 11 15 16 8 33 14 3 4 32 19 20 49e 39 31 6 22 21 1 1 48 52 51 49e 49 53 49a 49c 49b 49e 49f 49h 49d 49m 8 47 17 52 2 49p 49j 49q 49r 49g 05885 49k 55 5 Fig. 42 1 T ighten to 25–35 in-lbs (2.8–4.0 N  m) T ighten to 10–15 in–lb (1.1–1.7 N.m) U-cup (33) lips face air va ...

  • Graco Inc. 02748 - page 24

        Parts Drawing 12 11 15 16 8 33 14 3 13a 2 4 32 25 19 20 13c 13b 13d 5 39 31 6 22 21 1 Ref No. 13 Fan Air V alve Assembly Includes items 13a–13d Ref No. 49 Activator V alve Assembly Includes items 49a–49r 35 42 02765A 47 48 49 51 55 52 52 53 49a 49c 49b 49e 49f 49h 49r 49d 49j 49k 49m ...

  • Graco Inc. 02748 - page 25

       Parts List Part No. 949–239, Series C Optimiser 2K HVLP Spray Gun Ref No. Part No. Description Qty 1 238–139 GUN BODY 1 2 190–247 PLA TE, gun 1 3 185–761 TRIGGER, gun 1 4 625–723 PIN, pivot 1 5 203–953 SCREW , lock; No. 10–24 UNC-2A x 0.375” 1 6 188–490 NUT , fluid adjust ...

  • Graco Inc. 02748 - page 26

        T echnical Data Maximum W orking Fluid and Air Pressure 100 psi (7 bar) . . . . . . . . . . . . . . . . . . . . Weight 17.5 oz. (0.5 kg) . . . . . . . . . . . . . . . . . . . . . . . . . . . Air Inlet 1/4–18 npsm (R1/4–19) . . . . . . . . . . . . . . . . . . . compound thread Adhesive ...

  • Graco Inc. 02748 - page 27

       Notes ...

  • Graco Inc. 02748 - page 28

        The Graco W arranty and Disclaimers Graco warrants all equipment listed in this manual which is manufactured by Graco and bearing its name to be free from defects in material and workmanship on the date of sale by an authorized Graco distributor to the original purchaser for use. With the ...

Manufacturer Graco Inc. Category Paint Sprayer

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