Instructions - Parts List G15/G40 Spray Gun 3A0149C ENG A lightweight line of air-assisted spray guns for spraying and finishing a variety of paints and coatings, particularly in applications requiring uniform atomization and high transfer efficiency. For professional use only. Important Safety Instructions: Read all warnings and instructions in this manual. Save these instructions. See page 2 for model information including maximum working pressure.
Models Contents Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Related Manuals . . . . . . . . . . . . . . . . . . . . . . . . . . . Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Typical Installation . . . . . . . . . . . . . . . . . . . . . . . . Ventilate the Spray Booth . . . . . . . . . . . . . . . . . . Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Related Manuals Related Manuals This manual is available in the following languages: Manual Language 3A0149A English 3A0283A French 3A0282A Spanish 3A0442 Chinese 3A0443 Japanese 3A0444 Korean 3A0149C 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 EQUIPMENT MISUSE HAZARD Misuse can cause death or serious injury. • Do not operate the unit when fatigued or under the influence of drugs or alcohol. • Do not exceed the maximum working pressure or temperature rating of the lowest rated system component. See Technical Data in all equipment manuals. • Use fluids and solvents that are compatible with equipment wetted parts. See Technical Data in all equipment manuals. Read fluid and solvent manufacturer’s warnings.
Installation Installation Grounding Typical Installation NOTE: 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. • Ventilate the Spray Booth Check your local electrical code and pump manual for detailed grounding instructions. Use only electrically conductive fluid hoses.
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. • • 2. Install an air pressure regulator (C) on the gun air line to control air pressure to the gun. 3. Install an air shutoff valve (B) on the gun air line and on the pump air line, to shut off air to the gun. 4. Use a 3/16 in. (5 mm) I.D.
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. Slot Horizontal air cap position (standard) 2. Relieve the pressure. See Pressure Relief Procedure, page 10. Vertical air cap position Tip locating tab Select a Spray Tip FIG.
Setup Reverse-A-Clean® (RAC) Tip Assembly Model 24C857 guns use a Reverse-A-Clean® (RAC) tip. Screw the RAC tip assembly onto the gun and tighten firmly by hand. To assemble the RAC tip, insert the seat housing into the air cap assembly. TI7199A TI7196A FIG. 10 FIG. 7 Insert the SwitchTip. NOTICE The RAC assembly for current model guns uses a different seat housing and has a coarser thread than the RAC assembly for earlier model guns. They are not interchangeable.
Operation Operation 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. The card contains important treatment information should a skin injection injury occur. Additional cards are available at no charge from Graco. Pressure Relief Procedure TI6555A FIG.
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. 4.
Operation HVLP Operation NOTE: For HVLP operation, the atomization air must not exceed 10 psi. Use HVLP Verification Kit 24C788 to verify air psi. NOTE: 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.
Daily Gun Care, Flushing, and Cleaning Daily Gun Care, Flushing, and Cleaning NOTICE Methylene 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. NOTICE Do not use any cleaning method which may allow solvent into the gun air passages. Solvent left in gun air passages could result in a poor quality paint finish. Do not point the gun up while cleaning it. TI6563A Do not immerse the gun in solvent.
Daily Gun Care, Flushing, and Cleaning General System Maintenance Flushing and Cleaning 1. Relieve the pressure, page 10. NOTE: 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. 4. Flush the gun before changing colors and whenever you are done operating the gun.
Daily Gun Care, Flushing, and Cleaning 5. Increase the pressure slowly. Point the gun down into a grounded metal container, and flush the gun with solvent until all traces of fluid are removed from the gun passages. 10. Dip the end of a soft-bristle brush into a compatible solvent. Do not continuously soak the brush's bristles with solvent and do not use a wire brush. TI4845A TI6729A FIG. 19 FIG. 21 11. With the gun pointed down, clean the front of the gun, using the soft-bristle brush and solvent. 6.
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 FIG. 23 C 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 Engage the trigger lock. Rotate the SwitchTip. TI6581A ENGAGED TI7200A FIG. 31 FIG. 28 Return the SwitchTip to its original position. Disengage the trigger lock. TI7201A DISENGAGED TI6580A FIG. 29 Trigger the gun into a pail to clear the clog. FIG. 32 Disengage the trigger lock and continue spraying. Do not point gun at anyone or at any part of the body. TI6582A DISENGAGED FIG. 33 TI7202A FIG.
Troubleshooting Troubleshooting NOTE: • • Problem 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. Cause Solution Fluid leakage from back of fluid packing area. Worn packings or needle shaft. Replace needle assembly (2). Air leakage from gun. Air valve not seating properly. Clean or replace air valve (8). Fluid leakage from front of gun. Needle ball worn or damaged.
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 Complete Gun Packing Repair Disassembly Repair Kits Seat Repair NOTE: NOTE: • • • • • 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*). Plastic Seat Repair Kit 249424 and Carbide Seat Repair Kit 249456 are available and can be used with both Model G15 guns and Model G40 guns. For best results, use all new parts in the kit.
Repair 7. Reinstall the seat gasket (5b, carbide models only), seat (5c), and seat nut (5d). Torque to 45-50 in-lb. Be sure not to overtighten the nut. NOTE: • • When reinstalling the carbide seat (5c), the tapered end of the seat (red side) must point toward the gun tip. 13‡ The plastic seat (5c, model 24C854 guns), can be reinstalled in either direction. To avoid fluid leakage, do not reverse the direction of the plastic seat (5c) if it is worn. The seat must be replaced if it is worn. 3‡ 1 14‡ FIG.
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) and the shaft (9). 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. 39. 2. Unscrew the fluid inlet fitting (18). Remove and clean or replace the inline fluid filter (12). 3.
Repair 3A0149C 23
Repair Reassembly NOTE: 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 210-220 in-lb (24-25 N•m). Torque the fluid tube bracket screw to 50-60 in-lb (6-7 N•m). See FIG. 43. 8. Insert the fluid needle assembly (2) into the front of the gun.
Repair 6 6 4 12 21a (G15 only) 6 5b✖ (carbide only) 5c†✖ *5g 5d†✖ 11 *5f 5a *5e 15 *6a (G40 only) *6a 33 6 (G40 only) 11 4 21 *7 *6b 3 8 10 *8 13 3 *2a 19 3 7 6 (G15 only) 3 9 2 9 *22 1a 1 1 3 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.
Parts Parts Part No. 24C853 and 24C854, G15 Gun Part No. 24C855, G40 Gun Part No.
Parts Part No. 24C854, G15 Gun with Plastic Seat Part No. 24C853, G15 Gun with Carbide Seat Ref. No. 1 1a 2 Part No. Description Qty.
Parts Part No. 24C855, G40 Gun with Standard Tip Part No. 24C856, G40 Gun, High Flow Ref. No. 1 1a 2 Part No. Description Qty.
Parts 3A0149C 29
Parts Part No.
Parts Part No. 24C857, G40 Gun with RAC Tip Ref. No. Part No. 1 1a 249423 2 24B789 2a*✓ 3‡ 4★ 5★ 5a★ 5b✖★ 5c✖★ 5d✖★ 5e*★✓ 5f*★✓ 5g*★✓ 6★ 6a*★✓ 7*✓ 8* 9 11 13‡ 14‡ 15 16 17 19 20 3A0149C 110004 15G713 249877 288619 111116 109450 111457 24C921 109213 188493 16A529 15F195 15F739 15F740 114069 249317 15F202 115141 119996 Description Qty.
Spray Tip Selection Chart Spray Tip Selection Chart Spray Tips, for use with G15/G40 Air Cap AAM Fine Finish Spray Tips Recommended for high finish quality applications at low and medium pressures. Order desired tip, Part No. AAMxxx, where xxx = 3-digit number from matrix below. GG4 Industrial Spray Tips Recommended for high wear applications at high pressures. Order desired tip, Part No. GG4xxx, where xxx = 3-digit number from matrix below.
Spray Tip Selection Chart AAF Fine Finish Pre-Orifice Spray Tips Recommended for high finish quality applications at low and medium pressures. AAF tips have a pre-orifice that assists in atomizing sheer thinning materials, including lacquers. Order desired tip, Part No. AAFxxx, where xxx = 3-digit number from matrix below. * Fluid Output fl oz/min (lpm) Orifice Size in. (mm) 0.011 (0.279) 0.013 (0.330) 0.015 (0.381) 0.017 (0.432) * Maximum Pattern Width at 12 in. (305 mm) in.
Spray Tip Selection Chart RAC SwitchTips, for use with G40 RAC Air Cap, Continued NOTE: All tips in the Spray Tip Selection Charts below can be used with Model G40 guns equipped with RAC air cap 24C921. FFT Fine Finish RAC Spray Tips Order desired tip, Part No. FFTxxx, where xxx = 3-digit number from matrix below. ❖ Maximum Pattern Width at 12 in. (305 mm) in. (mm) * Fluid Output at Orifice Size in. 2000 psi (14.0 MPa, 140 bar) (mm) fl oz/min (lpm) 0.008 (0.203) 0.010 (0.254) 0.012 (0.305) 0.014 (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. Gun Lubricant 111265 One 4 oz. (113 g) tube sanitary (non-silicone) lubricant for fluid seals and wear areas. 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.
Accessories Plastic Seat Repair Kit 249424 Kit includes replacement plastic seat (pack of 10), and seat nut for Model G15 gun. Trigger Repair Kit 249585 Kit includes replacement trigger, pivot pins (qty. of 5), and pivot pin nuts (qty. of 5). SST Seat Repair Kit 287962 Kit includes assembled diffuser with SST seat for use with pigmented acid catalyzed materials. For use with gun 24C854 only. Trigger Stop Kit 249423 Kit includes replacement trigger stop and pin.
Accessories Part Interchangeability Guide Description Part Number New Models Part Number, (24Cxxx) Older Models* 16A529 Interchangeable? 24D627 15F193 15F194 15G618 G15 retaining ring kit Includes retaining ring, PTFE o-ring, and PTFE washer 24D438 15F192 Yes 16A529 combines the fluid spring shaft and seat into a single part. Directly replaceable. No New pin is shorter to match the new gun body. Using a new pin/air cap combo on an old model gun results in loss of the alignment feature.
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) 6.9 in. (17.
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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.
