Instructions - Parts List AA Series Spray Gun 311001C For air-assisted spraying and finishing of paints and coatings. Important Safety Instructions: Read all warnings and instructions in this manual. Save these instructions. See page 2 for List of Models and Table of Contents. Model G15 Model G40 TI6844A Graco Inc. P.O. Box 1441 Minneapolis, MN 55440-1441 Copyright 2005, Graco Inc. is registered to I.S.
Models Contents Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Related Manuals . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Typical Installation . . . . . . . . . . . . . . . . . . . . . . . . 6 Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Air Line . . . . . . . . . . . . . . . . . .
Related Manuals Related Manuals This manual is available in the following languages: Manual Language 311001 English 311145 Chinese 311146 Danish 311147 Dutch 311148 Finnish 311149 French 311150 German 311151 Italian 311152 Japanese 311153 Korean 311154 Norwegian 311155 Polish 311156 Russian 311157 Spanish 311158 Swedish 311001C 3
Warnings Warnings The following are general warnings related to the setup, use, grounding, maintenance, and repair of this equipment. Additional, more specific warnings may be found throughout the body of this manual where applicable. Symbols that appear in the body of the manual refer to these general warnings. When these symbols appear throughout the manual, refer back to these pages for a description of the specific hazard.
Warnings WARNING PRESSURIZED ALUMINUM PARTS HAZARD Do not use 1,1,1-trichloroethane, methylene chloride, other halogenated hydrocarbon solvents or fluids containing such solvents in pressurized aluminum equipment. Such use can cause serious chemical reaction and equipment rupture, and result in death, serious injury, and property damage. TOXIC FLUID OR FUMES HAZARD Toxic fluids or fumes can cause serious injury or death if splashed in the eyes or on skin, inhaled, or swallowed.
Installation Installation Typical Installation Grounding The typical installation shown in FIG. 1 is only a guide for selecting and installing air-assisted spray systems. Contact your Graco distributor for assistance in designing a system to meet your needs. Check your local electrical code and pump manual for detailed grounding instructions. Use only electrically conductive fluid hoses. Ground the spray gun through connection to a properly grounded fluid supply hose and pump.
Installation Air Line Fluid Line 1. Install an air filter (A) on the gun air line to ensure a dry, clean air supply to the gun. Dirt and moisture can ruin the appearance of your finished workpiece. See FIG. 1. • Before connecting the fluid line, blow it out with air and flush it with solvent. Use solvent which is compatible with the fluid to be sprayed. • If better control of fluid pressure is needed, install a fluid regulator on the fluid line to better control fluid pressure to the gun. 2.
Setup Setup Flush Before Using Equipment 1. The equipment was tested with lightweight oil, which is left in the fluid passages to protect parts. To avoid contaminating your fluid with oil, flush the equipment with a compatible solvent before using the equipment. See Flushing and Cleaning, page 14. 2. Relieve the pressure. See Pressure Relief Procedure, page 10. Select a Spray Tip and Air Cap The fluid flow and pattern width depend on the size of the spray tip, the fluid viscosity, and the fluid pressure.
Setup Reverse-A-Clean® (RAC) Tip Model 249238 guns use a Reverse-A-Clean® (RAC) tip. Insert the gasket seat. To assemble the RAC tip, insert the seat housing into the air cap assembly. TI7198A FIG. 10 TI7196A Screw the RAC tip assembly onto the gun and tighten firmly by hand. FIG. 8 Insert the SwitchTip. TI7199A TI7197A FIG. 11 FIG.
Operation Operation Safety 5. Hold a metal part of the gun firmly to a grounded metal pail. Trigger the gun to relieve pressure. See FIG. 12. SKIN INJECTION HAZARD Remember, this is not an air spray gun. For your safety be sure to read and follow the Warnings on pages 4 and 5 and throughout the text of this instruction manual. Keep the wallet sized warning card (222385), provided with the gun, with the operator of this equipment at all times.
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 more uniform pattern. The width of the pattern can be adjusted by the pattern adjustment valve.
Operation HVLP Operation For HVLP operation, the atomization air must not exceed 10 psi. Use HVLP Verification Kit 249140 to verify air psi. There is no fan adjustment when using RAC tips and caps. 1. To achieve the best results when applying fluid, keep the gun perpendicular to the surface and maintain a consistent distance of approximately 8 to 12 in. (200 to 300 mm) from the object being sprayed. 2. To obtain an even finish, use smooth, even strokes across the object being sprayed with 50% overlap. 3.
Daily Gun Care, Flushing, and Cleaning Daily Gun Care, Flushing, and Cleaning CAUTION SKIN INJECTION HAZARD Follow the Pressure Relief Procedure on page 10 before cleaning the gun. Methlyene chloride with formic or propionic acid is not recommended as a flushing or cleaning solvent with this gun as it will damage aluminum and nylon components. CAUTION Solvent left in gun air passages could result in a poor quality paint finish.
Daily Gun Care, Flushing, and Cleaning General System Maintenance Flushing and Cleaning 1. Relieve the pressure, page 10. 2. Clean the fluid and air line filters daily. 3. Check for any fluid leakage from the gun and fluid hoses. Tighten fittings or replace equipment as needed. FIRE AND EXPLOSION HAZARD Read Warnings, page 4. Follow Grounding instructions, page 6. 4. Flush the gun before changing colors and whenever you are done operating the gun.
Daily Gun Care, Flushing, and Cleaning 4. Connect the solvent supply hose (T) to the gun. CAUTION Trigger the gun whenever you tighten or remove the diffuser (5). This keeps the needle ball away from the seating surface and prevents the seat from being damaged. 9. If it is necessary to remove the diffuser (5) to clean, trigger the gun while you remove the diffuser with the gun tool (30). T 10. Dip the end of a soft-bristle brush into a compatible solvent.
Daily Gun Care, Flushing, and Cleaning 16. After cleaning the gun, lubricate the following parts with lubricant 111265 weekly: • • Trigger pivot pin (A) Boss on both sides of the gun where the trigger contacts the gun body (B) Fluid needle shaft, behind trigger (C) • A B TI6570A C FIG. 24 13. If the diffuser was removed, trigger the gun while you reinstall the diffuser (5) with the gun tool (30). Tighten the diffuser securely to obtain a good seal. Torque to 155-165 in-lb (18-19 N•m).
Daily Gun Care, Flushing, and Cleaning Rotate the SwitchTip. Engage the trigger lock. ENGAGED TI6581A TI7200A FIG. 29 FIG. 32 Disengage the trigger lock. Return the SwitchTip to its original position. DISENGAGED TI7201A TI6582A FIG. 30 FIG. 33 Trigger the gun into a pail to clear the clog. Disengage the trigger lock and continue spraying. SKIN INJECTION HAZARD Do not point gun at anyone or at any part of the body. DISENGAGED TI6582A FIG. 34 TI7202A FIG.
Troubleshooting Troubleshooting SKIN INJECTION HAZARD Follow Pressure Relief Procedure on page 10. Read warnings, page 4. • Check all possible remedies in the troubleshooting charts before disassembling the gun. • Some improper patterns are caused by the improper balance between air and fluid. General Troubleshooting Problem Cause Solution Fluid leakage from back of fluid packing area. Worn packings or needle shaft. Replace needle assembly (2). Air leakage from gun.
Troubleshooting Problem Fluttering or spitting spray. Cause Solution Insufficient fluid supply. Adjust fluid regulator or fill fluid supply tank. Air in paint supply line. Check, tighten pump siphon hose connections, bleed air from paint line. Attempting to “feather” (partially trigger the gun). Cannot “feather” with an AA gun. Feather will cause drastic reduction of pressure at the tip, resulting in poor atomization and/or spitting. Striping spray. Spray tip partially plugged.
Repair Repair Items Needed for Service • • • • • • • • 1 Seal Installation Tool (28)-- provided Nut Driver Tool (29) -- provided Gun Tool (30) -- provided O-ring Pick 7/32 in. Hex Wrench 3/16 in. Hex Wrench Compatible Solvent Lubricant (part number 111265) 4 C 1 1 Repair Kits • Seal Repair Kit 249422 is available. For best results, use all the new parts in the kit. Kit parts are marked with an asterisk, for example (7*).
Repair 4. Inspect the o-rings (5e*, 5f*, and 5g*) in place. Carefully remove the o-rings from the diffuser housing (5a) and replace if necessary. 5. Remove the seat nut (5d†), seat (5c†) and seat gasket (5b†, model G40 gun only) using a 7/32 in. hex wrench. Needle Repair 1. Remove the diffuser, see Seat Repair, page 20. 2. Remove the trigger pivot pin nut (14‡), pivot pin (13‡), and trigger (3‡) using the gun tool (30) and nut driver (29). See FIG. 38. 6.
Repair Air Valve Repair Fluid Tube Replacement 1. Unscrew the spring cap (11) from the back of the gun body (1) using the gun tool (30). Remove the two springs (15 and 19), the shaft (9), and seat (10). 1. Remove the air inlet fitting (17) using the gun tool (30) and remove the screw (20) using a 3/16 in. hex wrench. 2. Push the air valve assembly (8*) out the back of the gun. See FIG. 40. 2. Unscrew the fluid inlet fitting (18). Remove and clean or replace the inline fluid filter (12). 3.
Repair 311001C 23
Repair Reassembly • 6. Install the two springs (15 and 19). Screw the spring cap (11) into the back of the gun body. Torque to 175-185 in-lb (20-21 N•m). See Repair Kits, page 20. 1. Install the tube gasket (22*) in the gun. Handtighten the fluid tube connector (C) into the gun’s fluid inlet. Handtighten the air inlet fitting (17) and screw (20). Torque the fluid tube connector to 150-160 in-lb (17-18 N•m). Torque the air inlet fitting to 175-185 in-lb (20-21 N•m).
Repair 5b† (G40 only) 6 6 4 6 12 *5g 5c† 5d† 11 *5f 5a *5e 15 21a (G15 only) 33 *6a 6 (G40 only) 11 4 *7 3 21 *6b 8 *8 13 3 *2a 19 10 3 7 3 6 (G15 only) 13 9 2 9 *22 1 1a 1 1 Torque to 150-160 in-lb (17-18 N•m). 3 Lubricate lightly. 4 Torque to 155-165 in-lb (18-19 N•m). 5 Torque to 20-30 in-lb (2-3 N•m). 6 Do not lubricate diffuser o-rings. 7 Brass part must be behind trigger. 8 Lips face out of gun body. 9 Torque to 50-60 in-lb (6-7 N•m).
Parts Parts Part No. 249233/G15 Gun Part No. 249242/G40 Gun Part No.
Parts Part No. 249233/G15 Gun w/Plastic Seat Part No. 287926/G15 Gun w/Carbide Seat Part No. 249242/G40 Gun w/Standard Tip Part No. 249246/G40 Gun, High Flow Ref. No. 1 1a 2 Ref. No. 1 1a 2 Part No. Description Qty.
Parts Parts Part No.
Parts Part No. 249238/G40 Gun w/RAC Tip Ref. No. 1 1a 2 2a* 3‡ 4★ 5★ 5a★ 5b†★ 5c†★ 5d†★ 5e*★ 5f*★ 5g*★ 6★ 6a*★ 7* 8* 9 10 11 13‡ 14‡ 15 16 17 19 20 22* 28* 29 30 31▲ 32▲ 33 33a 35★ Part No. Description Qty.
Spray Tip Selection Chart Spray Tip Selection Chart Spray Tips, for use with AA Series Air Cap AAM Fine Finish Spray Tips Recommended for high finish quality applications at low and medium pressures. Order desired tip (Part No. AAMxxx) from matrix below. GG4 Industrial Spray Tips Recommended for high wear applications at high pressures. Order desired tip (Part No. GG4xxx) from matrix below. • • All tips in the Spray Tip Selection Chart below can be used with Model G40 guns (249242).
Spray Tip Selection Chart RAC SwitchTips, for use with AA Series Air Cap All tips in the Spray Tip Selection Charts below can be used with Model 249238 G40 guns equipped with RAC air cap 249478. Tips are sometimes packaged with other promotional parts intended for the airless market. Disregard extra parts. LTX RAC Spray Tips Order desired tip (Part No. LTXxxx) from matrix below. ❖ Maximum Pattern Width at 12 in. (305 mm) * Fluid Output, fl oz/min (lpm) Orifice Size in. (mm) at 2000 psi (14.
Spray Tip Selection Chart RAC SwitchTips, for use with AA Series Air Cap Continued • All tips in the Spray Tip Selection Charts below can be used with Model 249238 G40 guns equipped with RAC air cap 249478. FFT Fine Finish RAC Spray Tips Order desired tip (Part No. FFTxxx) from matrix below. * Fluid Output, fl oz/min (lpm) Orifice Size in. (mm) at 2000 psi (14.0 MPa, 140 bar) ❖ Maximum Pattern Width at 12 in. (305 mm) 4 to 6 (150) 6 to 8 (200) 8 to 10 (250) 10 to 12 12 to 14 (300) (350) 0.008 (0.
Accessories Accessories Use Only Genuine Graco Parts and Accessories Air Fitting and Tubing Kit 249473 Alternative-style connector for air inlet and hose. 3/8 in. to 1/4 npt(f) Push-To-Lock fitting, 25 ft (7.62 m) long, 3/8 in. (9.5 mm) ID, nylon tubing. Air Hose 241811 100 psi (0.7 MPa, 7 bar) Maximum Working Pressure 1/4-18 npsm(fbe), 1/4 in. (6 mm) ID, 25 ft (7.62 m) long polyurethane tubing.
Technical Data Technical Data Category Data Maximum Working Fluid Pressure . . . . . . . . . . . . . . . . . . Model G15: 1500 psi (10 MPa, 105 bar) Model G40: 4000 psi (28 MPa, 280 bar) Maximum Working Air Pressure . . . . . . . . . . . . . . . . . . . . 100 psi (0.7 MPa, 7 bar) Maximum Gun Inlet Air Pressure for HVLP Operation . . . 14 psi (0.098 MPa, 0.98 bar) Maximum Working Fluid Temperature . . . . . . . . . . . . . . . 110°F (43°C) Fluid Inlet . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dimensions Dimensions Model G15 6.9 in. (17.5 cm) 8.0 in. (20.3 cm) 5.0 in. (12.7 cm) TI6583A 6.1 in. (15.5 cm) Model G40 6.9 in. (17.5 cm) 8.0 in. (20.3 cm) 5.8 in. (14.7 cm) TI6845A 6.9 in. (17.
Graco Standard Warranty Graco warrants all equipment referenced in this document which is manufactured by Graco and bearing its name to be free from defects in material and workmanship on the date of sale 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.
