INSTRUCTIONS-PARTS LIST 308–293 Rev. G Supersedes E and PCN G This manual contains important warnings and information. READ AND KEEP FOR REFERENCE. INSTRUCTIONS Model M-1265, Series B Optimiser HVLP Spray Gun 100 psi (0.7 MPa, 7 bar) Maximum Working Fluid Pressure 100 psi (0.7 MPa, 7 bar) Maximum Working Air Pressure 65 psi (444 kPa, 4.4 bar) Maximum Compliant Inbound Air Pressure U.S. Patent Pending GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN COPYRIGHT 1993, GRACO INC. Graco Inc.
Table of Contents Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Selection Charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Air Flow and Atomizing Pressure . . . . . . . . . . . . . . . . . 7 Typical Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
WARNING 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 13 when: you are instructed to relieve pressure; stop spraying; clean, check or servicing the equipment; and install or clean fluid nozzles. Do not point the spray gun at anyone or at any part of the body.
Selection Charts TERMS: Light Fluid: Up to 18 seconds with No. 2 Zahn cup (20 centipoise) Medium Fluid: 19 to 28 seconds with No. 2 Zahn cup (20–64 centipoise) Heavy Fluid: Greater than 28 seconds with No. 2 Zahn cup (greater than 64 centipoise) -2.8 Volatile Organic Compounds, High-solid Polyurethanes, Heavy Waterborne Enamels P/N: Part number NOTE: See page 6 for additional tips on selecting the needle/nozzle/air cap set best suited to your application.
Selection Charts CHART 1: GUN ASSEMBLIES, Series B (continued) Optional Non-HVLP Compliant Gun Assemblies With standard needle and nozzle and optional high pressure air cap Includes: Optional Complete Gun Assy. Part No. Needle Assy. P/N * Nozzle P/N { High Pressure Air Cap P/N Orifice Size 236–023 238–217 276–293 189–755 0.042” (1.067 mm) Light to Medium Fluids or Low Fluid Flow [5–8 oz./min. (0.15–0.24 l/min.)] 236–024 238–218 276–294 189–755 0.055” (1.
Selection Charts CHART 3: OPTIONAL ORIFICE PURGE SST NEEDLE Optional Stainless Steel Orifice-Purge Needle Part No. Orifice Size 186–931 0.042” (1.067 mm) 186–932 0.055” (1.397 mm) 186–933 0.070” (1.778 mm) 186–934 0.086” (2.184 mm) CHART 4: NEEDLE ASSEMBLY REPLACEMENT TIPS Needle Assembly Part No.
Air Flow and Atomizing Pressure NOTE: All tests were completed with the pattern adjustment valve fully open.
Typical Installation NOTE: See the Accessories section for accessories recommended to install the system. E F G H A B C KEY A B C D E F G H Model M-1265 Spray Gun See page 4 for part numbers. Fluid Inlet; 3/8 npsm (R3/8–19) Air Inlet; 1/4 npsm Air Hose Recommend 5/16” (7.9 mm) ID hose Optional 3/8” (9.
Setup 1. Connect the Air Line 2. Connect the Fluid Hose NOTE: NOTE: You must install an air pressure regulator (F) on the gun air line to control air pressure to the gun. See Fig. 2. 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 your regulated air source does not have a filter, install an air filter (G) on the air line to ensure a dry, clean air supply to the gun.
Setup 3. Flush the Spray Gun. 6. Adjust the Spray Pattern Before running any paint through the spray gun, flush the gun out with a solvent that is compatible with the fluid to be sprayed, using the lowest possible fluid pressure and a grounded metal container. WARNING COMPONENT RUPTURE HAZARD Do not exceed the 100 psi (0.7 MPa, 7 bar) maximum fluid and air pressure of this gun. Higher pressures can cause parts to rupture and result in serious injury.
Setup 6. Adjust the Spray Pattern (continued) B. Adjust the fluid flow using the fluid pressure regulator (L) installed in the gun fluid line. Typical industrial flow rates will vary with regulator pressures from 5 to 10 psi (34 to 70 kPa, 0.3 to 0.7 bar). NOTE: A larger fluid nozzle at a reduced fluid pressure will maintain the same flow rate, but slow down the fluid stream (velocity). When air is applied, this allows the air to act on the fluid longer and improve the atomization. D.
Setup 6. Adjust the Spray Pattern (continued) E. Open the pattern adjustment valve (13a) by turning it fully counterclockwise for a full fan pattern. G. Test the spray pattern and atomization while holding the gun about 6 to 8 inches (150 to 200 mm) from the test piece. H. The spray pattern may be too wide with the pattern adjustment knob (13a) turned fully counterclockwise. Turn the pattern adjustment knob clockwise until you have the desired pattern size.
Operation Pressure Relief Procedure WARNING PRESSURIZED EQUIPMENT HAZARD The system pressure must be manually relieved to prevent the system from starting or spraying accidentally. To reduce the risk of an injury from accidental spray from the gun, splashing fluid, or moving parts, follow the Pressure Relief Procedure whenever you: are instructed to relieve the pressure, stop spraying, check or service any of the system equipment, or install or clean the spray nozzle.
Daily Gun Care, Flushing, and Cleaning WARNING CAUTION PRESSURIZED EQUIPMENT HAZARD To reduce the risk of a serious injury whenever you are instructed to relieve pressure, follow the Pressure Relief Procedure on page 13. Clean all parts with a non-conductive solvent, compatible with the fluid being sprayed. Conductive solvents can cause the gun to malfunction.
Daily Gun Care, Flushing, and Cleaning WARNING PRESSURIZED EQUIPMENT HAZARD To reduce the risk of a serious injury whenever you are instructed to relieve pressure, follow the Pressure Relief Procedure on page 13. 4. Point the gun down into a grounded metal container, and flush the gun with solvent until all traces of paint are removed from the gun passages. 1. Relieve the pressure. 2. Disconnect the fluid supply hose (J) from the gun; do not disconnect the air supply hose. 02053 Fig. 3 J 5.
Daily Gun Care, Flushing, and Cleaning 8. Remove the air cap ring (12) and air cap (19). 12. With the gun pointed down, clean the front of the gun, using the soft-bristle brush and solvent. 9. Trigger the gun while you remove the fluid nozzle (20) from the gun with the gun wrench (35). 20 35 12, 19 02060A Fig. 5 CAUTION Fig. 7 Trigger the gun whenever you tighten or remove the nozzle. This keeps the needle seat away from the nozzle seating surface and prevents the seat from being scratched. 10.
Daily Gun Care, Flushing, and Cleaning 14. Trigger the gun while you install the fluid nozzle (20) with the gun wrench (35). CAUTION When tightening the nozzle, do not exceed 35 in-lbs (4 NSm) torque. Over-tightening the nozzle can cause the nozzle hex to round, can affect the spray pattern, and is unnecessary to guarantee a seal. 15. Install the air cap ring (12) and air cap (19). 17.
Troubleshooting WARNING PRESSURIZED EQUIPMENT HAZARD To reduce the risk of a serious injury, follow the Pressure Relief Procedure on page 13 before checking or repairing any part of the gun or system. PROBLEM Fluid flow is fluttering while spraying CAUSE SOLUTION 1. Fluid nozzle not tight enough 1. Tighten fluid nozzle; Do not exceed 35 in-lbs (4 N m) torque. 2. Fluid filter clogged 2. Check fluid filter. 3. Fluid adjustment knob not properly set 3.
Notes 308–293 19
Service Items Needed for Service Gun Wrench – provided Seal Installation Tool – provided Adjustable Wrench Screw Driver Lubricant part no. 111–265; see Accessories to order Compatible Solvent 20 35 12, 19 NOTE: Gun Repair Kit 236–007 is available. The kit includes the air valve assembly (14), ring packing (22) u-cup seals (32, 33), and packing assembly (39). See page 25 to order. The following procedure covers the replacement of all the parts included in the Gun Repair Kit.
Service 11. Clean the parts. Check the fluid needle (21) for damage or excessive wear. Replace if necessary. CAUTION Do not use excessive force to push out the packing assembly (39) or the u-cup seal (33) as this may bend the fluid needle (21). Refer to Fig. 3 and 4. If packings are difficult to remove, use a 3/16 in. plastic rod to push them out. 9. Push the three piece packing assembly (39) out toward the back of the gun, with the threaded end of the fluid needle, as shown in Fig. 3. 12.
Service Assembly 1. Insert the fluid needle (21) through the front of the gun as shown in Fig. 6. Install the new packing assembly (39) by placing them on the end of the needle tip. Orientate the packings as shown in Fig. 6. 4. Place the new u-cup seal (33) on the seal installation tool (42) with the u-cup lips facing the tool as shown in Fig. 8. 5. Push the packing (33) into the gun until a definite snap is felt. 1 33 1 2 42 39 21 3 1 Washer 2 U-cup; lips face down 3 Spreader Fig.
Service 8. Tighten the packing adjustment screw (31) with the gun wrench (35), as shown in Fig. 10, until you can feel a slight drag on the fluid needle. Do not overtighten the screw as this may bind the needle movement. 16. Trigger the gun to test the needle movement. If the needle does not return after the trigger is released or is slow in returning, loosen the packing adjustment screw (31) with the gun wrench (35) until the needle returns freely. See Fig. 10. 17.
Parts Drawing 19 20 9 21 Needle set for optional guns 34 2 5 12 8 5 11 13dn 13b 4 10 1 25 3 Ref No. 13 Includes items 13a–13d 13cn 13a 4 33* 39* 6 3 14* 21 1 1 Needle for standard guns 31n 1 15 1 16 7 32* 22* 3 6 35 2 42 8 02025A 1 Lightly lubricate 6 U-cup lips face air valve (14) 2 Lightly lubricate threads 7 U-cup lips face spring (16) 3 Torque to 25–35 in-lbs (2.8–4.
Parts List Part No. 236–013 to 236–016, Series B M-1265 Standard HVLP Spray Gun With standard needle, nozzle, and air cap Includes items 1–42 Part No. 236–023 and 236–024, Series B M-1265 Optional Non-HVLP Compliant Spray Gun With standard needle and nozzle and optional high pressure air cap Includes items 1–42 Part No. 236–020 to 236–028, Series B M-1265 Optional HVLP Spray Gun With optional needle, nozzle, and air cap Includes items 1–42 Ref No. Part No.
Accessories Cleaning Brush 105–749 For use in cleaning gun Air Hose Quick-disconnect Install between gun air inlet fitting and air hose. 208–536 169–970 Lubricant 111–265 One 4 oz. (113 gram) tube sanitary (non-silicone) lubricant for fluid seals and wear areas. Fluid Hose Assembly 205–142 300 psi (2.1 MPa, 21 bar) Maximum Working Pressure Nylon with neoprene cover, 0.25 in. (2.4 mm) ID, 3/8 npsm(fbe), 25 ft. (7.
Accessories SST Pressure Cup Kit 235–374 with double air regulator 1 qt. (0.95 liter) capacity, 304 stainless steel cup. Includes a pressure relief valve, a 0–100 psi (0–0.7 MPa, 0–7 bar) air regulator for gun atomization, and a 0–15 psi (0–104 kPa, 0–1.0 bar) air regulator for the 1 qt. pressure cup supply air. Disposable Polyethylene Cup Liners Paint and solvent resistant. 40 liners per box. 112–490 112–491 01726 1 Quart Cup Size 2 Quart Cup Size 2 Quart Pressure Cup 214–627 2 qt. (1.
Accessories Low Pressure SST Pressure Tanks High Pressure SST Pressure Tanks For fluid pressures up to 15 psi (104 kPa, 1.
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Notes 30 308–293
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Graco Warranty and Limitation of Liability WARRANTY 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. 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.
