Graco 308640 manual

308640 Rev . J Supersedes G includes Rev . H First choice when quality counts. t 05985 Part No. 238402 Spray Gun shown INSTRUCTIONS-P ARTS LIST INSTRUCTIONS This manual contains important warnings and information. READ AND KEEP FOR REFERENCE. HIGH PRESSURE AIR-ASSISTED Model AA Plus t Spray Gun 4000 psi (28 MPa, 280 bar) Maximum Working Fluid Press[...]

2 308640 T able of Contents W arnings 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Installation 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Operation 7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . General T roubleshooting 14 . . . . . . . . . . . . . . . .[...]

308640 3 W ARNING INSTRUCTIONS EQUIPMENT MISUSE HAZARD Equipment misuse can cause the equipment to rupture, malfunction, or start unexpectedly and result in serious injury .  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[...]

4 308640 Installation KEY A Air Line Filter B Air Line Lubricator C* Bleed-type Air Shutoff V alve D Pump Air Regulator E* Fluid Drain V alve F Fluid Shutoff V alve G Fluid Filter H* Grounded Fluid Hose J Pump K Air Line L Air Pressure Regulator M Pump Fluid Inlet N In-line Fluid Filter P Pattern Adjustment V alve Knob Q* Fluid Pressure Regulator R[...]

308640 5 Installation Connect the Air Line 1. Install an air line filter (A) to ensure a clean, dry air supply to the gun. Dirt and moisture in the line can ruin the appearance of your finished piece. See Fig. 1. 2. Install an air pressure regulator (L) on the gun air supply line to control the air pressure to the gun. 3. Install an air pressure re[...]

6 308640 Installation Ground the System W ARNING FIRE AND EXPLOSION HAZARD Improper grounding could cause static sparking, which could cause a fire or explosion. T o reduce the risk of property damage or serious injury , follow the grounding instructions below . The following grounding instructions are minimum requirements for a system. Y our syste[...]

308640 7 Operation Safety W ARNING INJECTION HAZARD Remember , this is not an air spray gun. For your safety be sure to read and follow the W arnings on pages 2 and 3 and throughout the text of this instruction manual. Keep the wallet sized warning card 179960, pro- vided with the gun, with the operator of this equip- ment at all times. The card co[...]

8 308640 Operation How the Air-Assisted Spray Gun Operates The air-assisted spray gun combines airless and air spraying concepts. The spray tip shapes the fluid into a fan pattern, as does a conventional airless spray tip. Air from the air cap further atomizes the fluid and completes the atomization of the paint tails into the pattern to produce a [...]

308640 9 Operation Adjust the Spray Pattern W ARNING RECOIL HAZARD Due to the very high pressure fluid emitted, a strong recoil action will occur when you trigger this gun. If you are unprepared, your hand could be forced back toward your body or you could lose your balance and fall, resulting in serious injury . W ARNING INJECTION HAZARD T o reduc[...]

10 308640 Operation Apply the Fluid When applying the fluid, keep the gun a consistent distance, about 8 to 12 inches (200 to 300 mm) from the surface of the object being sprayed. Always hold the gun at a right angle from the surface. Do not make an arc with the gun as it causes an uneven coat of fluid. See Fig. 6. CAUTION Openings in the tip guard[...]

308640 1 1 Operation Clean the Spray Gun and System Daily W ARNING INJECTION HAZARD T o reduce the risk of an injection injury or splashing fluid in the eyes or on the skin:  Follow the Pressure Relief Procedure on page 7 before cleaning, removing, or installing a spray tip and whenever you are instructed to relieve pressure.  Do not wipe flu[...]

12 308640 Operation Flush the Gun Daily W ARNING INJECTION HAZARD T o reduce the risk of a fluid injection injury , follow the Pressure Relief Proce- dure on page 7 before cleaning, removing, or installing a spray tip and whenever you are instructed to relieve pressure. W ARNING T o reduce the risk of serious injury , including splashing fluid in t[...]

308640 13 Notes[...]

14 308640 T roubleshooting W ARNING INJECTION HAZARD T o reduce the risk of a fluid injection injury , follow the Pressure Relief Proce- dure on page 7 before checking or servicing any of the system equipment and when- ever you are instructed to relieve pressure. NOTE:  Check all possible remedies in the troubleshooting charts before disassembli[...]

308640 15 T roubleshooting Spray Pattern T roubleshooting Problem Cause Solution Fluttering or spitting spray Insufficient fluid supply Air in paint supply line Attempting to “feather” (partially trig- ger) the gun. Adjust fluid regulator or fill fluid supply tank. Check, tighten siphon hose connec- tions, bleed air from paint line. Cannot “f[...]

16 308640 Service W ARNING INJECTION HAZARD T o reduce the risk of a fluid injection injury , follow the Pressure Relief Proce- dure on page 7 before checking or servicing any of the system equipment and when- ever you are instructed to relieve pressure. NOTE:  Follow the Service Notes in Fig. 8 when reassem- bling the gun. Refer to the parts dr[...]

308640 17 Service Gasket (18) must be replaced if dif fuser-seat (15) is removed or replaced to avoid fluid leakage Gasket (17) must be replaced if fluid connector (30) is removed or replaced to avoid fluid leakage Lubricate threads Apply anaerobic pipe sealant to threads Apply high strength sealant to threads Thread nut to bottom thread of needle [...]

18 308640 Parts 1 2 3 5 6 7 8 9 25 24 23 11 12 13 14 15 16 17 30 19 18 10a 10b 29 5b 5a 34 26 1 Apply high strength sealant to threads. T orque to 23–27 ft-lb (31–37 N  m) Gasket (18) must be replaced if diffuser-seat (15) is removed or replaced to avoid fluid leakage. Gasket (17) must be replaced if fluid connector (30) is removed or replac[...]

308640 19 Parts Use Only Genuine Graco Parts and Accessories Part No. 238402, 238852, 238883, and 241070 Ref. No. Part No. Description Qty . Ref. No. Part No. Description Qty . 1 238750 BODY , gun 1 2 106917 ADAPTER, air; Included with Gun 238402, 238883, and 241070 only 1 1 13367 COUPLING, air , quick-disconnect; Included with Gun 238852 only 1 3 [...]

20 308640 Parts 1 3 5 6 7 8 9 25 24 23 11 13 14a 15 17 30 19 18 10a 10b 29 5b 5a 34 26 1 Apply high strength sealant to threads. T orque to 23–27 ft-lb (31–37 N  m) Gasket (18) must be replaced if diffuser-seat (15) is removed or replaced to avoid fluid leakage. Gasket (17) must be replaced if fluid connector (30) is removed or replaced to a[...]

308640 21 Parts Use Only Genuine Graco Parts and Accessories Part No. 238851 and 239001 Ref. No. Part No. Description Qty . 1 238750 BODY , gun 1 2 106917 ADAPTER, air 1 3 276429 TRIGGER, gun 1 5 217489 V AL VE, pattern adjustment; Includes items 5a and 5b 1 5a 1681 10 S O-RING, nitrile rubber 1 5b 105456 S RET AINER, clip 1 6 106903 SPRING, compre[...]

22 308640 Spray T ip Selection Charts NOTE: Part No. 238755 Fluid Needle and 224855 Diffuser- seat must be used with GG4 tips larger than 0.025 in. (0.635 mm). Standard Spray T ips, for use with Air Cap 239781 Fan Width *Light to Orifice Size Fan Width at 12” (300 mm) Light to Medium V iscosity *Heavy V iscosity Part No Size in c h es (300 mm) In[...]

308640 23 Spray T ip Selection Charts Standard Spray T ips, for use with Air Cap 239781 Fan Width * Light to Orifice Fan Width at 12” *Light to Medium *Heav y Orifice Size at 12 (300 mm) Medi u m V iscosity Heavy V iscosity Part No. 0.021 (0.533) 6–8 (150–200) 35.0 (1.0) 27.0 (0.8) GG4321 () 8–10 (200–250) () () GG4421 10–12 (250–300)[...]

24 308640 Spray T ip Selection Charts Standard Sealer Tips, f or use with Air Cap 239781 NOTE: Part No. 238755 Fluid Needle and 224855 Diffuser- seat must be used with GG4 tips larger than 0.025 in. (0.635 mm). *Light to Orifice Size Light to Medium V iscosity *Heavy V iscosity Part No Size inches V iscosity fl oz/min V iscosity fl oz/min Part No. [...]

308640 25 Spray T ip Selection Charts AA Reverse-A-Clean (AA RAC  ) Spray T ips Fan Width * Light to Orifice Fan Width at 12” *Light to Medium *Heav y Orifice Size at 12 (300 mm) Medi u m V iscosity Heavy V iscosity Part No. 0.023 (0.584) 8–10 (200–250) 40.0 (1.2) 34.0 (0.97) 242423 12–14 (300–350) 242623 0.025 (0.635) 10–12 (250–3[...]

26 308640 T echnical Data Maximum Working Fluid Pressure 4000 psi . . . . . . . . . (28 MPa, 280 bar) Maximum Working Air Pressure 100 psi . . . . . . . . . . . . . (0.7 MPa, 7 bar) Maximum Working Fluid T emperature . 120 _ F (49 _ C) Weight (less filter) 1.33 lb (0.59 Kg) . . . . . . . . . . . . . . . . Fluid Inlet 1/4–18 npsm . . . . . . . . .[...]

308640 27 Accessories Use Only Genuine Graco Parts and Accessories Grounding Clamp and Wire 22201 1 12 ga, 25 ft (7.6 m) wire High Pressure Ball V alves, V iton  Seals 5000 psi (35 MPa, 350 bar) Maximum Working Pressure Can be used as fluid drain valve. 210657 1/2 npt(m) 210658 3/8 npt(m) 210659 3/8 x 1/4 npt(m) In-line Fluid Filter 210500 5000 [...]

28 308640 Graco Standard W arranty Graco warrants all equipment 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 exception of any special, extended, or limited warranty published by Graco, Graco will, for [...]