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INSTRUCTIONS-PARTS LIST
This manual contains important
warnings and information.
READ AND KEEP FOR REFERENCE.
INSTRUCTIONS
Optimiser 2K
HVLP Two Component
Adhesive Spray Gun
100 psi (7 bar) Maximum Working Fluid and Air Pressure
This gun is for use with water-based contact adhesives only
Part No. 949–239, Series C
U.S. Patent Pending
GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440–1441
COPYRIGHT 1993, GRACO INC.
Graco Inc. is registered to I.S. EN ISO 9001
308–341
Supersedes F
First choice when
quality counts.
Rev. G
02748
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Table of Contents
Related Manuals for Graco Optimiser 2K 02748
Summary of Contents for Graco Optimiser 2K 02748
- Page 1 INSTRUCTIONS-PARTS LIST This manual contains important warnings and information. READ AND KEEP FOR REFERENCE. INSTRUCTIONS Optimiser 2K HVLP Two Component Adhesive Spray Gun 100 psi (7 bar) Maximum Working Fluid and Air Pressure This gun is for use with water-based contact adhesives only Part No.
- Page 2 Table of Contents Warnings ........Selection Chart .
- Page 3 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: you are instructed to relieve pressure;...
- Page 4 Includes: Needle/ Nozzle/Air Needle Cap Kit Assembly 949–276 238–703 949–277 238–703 949–278 238–703 949–279 238–217 949–280 238–218 949–281 238–219 949–282 238–220 Selecting a Needle/Nozzle/Air Cap Kit The kits range in size to provide different fluid flow rates. Use the fluid nozzle that will give the required flow with the fluid adjustment knob opened four full turns counterclockwise and an adhesive pressure of approximately 5 to 20 psi (0.35 to 1.4 bar).
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Page 5: Air Flow And Atomizing Pressure
Air Flow and Atomizing Pressure NOTE: All tests completed with the fan air fully open. Air Flow GUN AIR INLET PRESSURE (psi) Atomizing Pressure Versus Activator Inlet Pressure Air flowing through the gun creates back pressure, which the activator must overcome before beginning to flow. - Page 6 Optimiser 2K Spray Gun Air Inlet; 1/4 npsm Air Hose Recommend 5/16” (7.9 mm) ID hose; Optional 3/8” (9.5 mm) ID hose Gun Air Shut-off Valve Gun Air Regulator Air Filter G Air Supply Line Pressure Pot Air Shut-off Valve Pressure Pot Air Regulator Activator Pressure Pot Activator Fluid Shut-off Valve...
- Page 7 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.
- 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.
- Page 9 Setup and Shutdown WARNING 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).
- 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.
- 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 off. See Fig. 14. 1–6 in.
- 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 Versus Activator Inlet Pressure chart on page 5 when adjusting the gun.
- Page 13 NOTE: You cannot sample the adhesive and activator at the same time. The adhesive must be checked with the atomizing air off, while the activator must be checked with the atomizing air on. 1. Check the ratio of the adhesive. A.
- 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.
- Page 15 Daily Gun Care, Flushing, and Cleaning Clean the gun. (continued) B. Disconnect the air supply line (C). See Fig. 24. 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.
- Page 16 Daily Gun Care, Flushing, and Cleaning 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.
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Page 17: Troubleshooting
Troubleshooting PROBLEM CAUSE Fluid flow is fluttering while spraying Fluid flow fades while spraying high viscosity fluids Pattern becomes off-set or heavy on ends Fluid system will not operate at low There is no fluid regulator, or the air regu- enough fluid pressure [below lator on the pressure pot is not sensitive 10 psi (0.7 bar)]... - Page 18 Items Needed for Service Gun Wrench – provided Seal Installation Tool – provided Adjustable Wrench Screw Driver Part No. 111–265 Lubricant Soap and water NOTE: Gun Repair Kit 949–285 is available; see page 25. The following procedure covers the replacement of all the kit parts.
- Page 19 10. Use the threaded end of the fluid needle (21) to push out the u-cup seal (33). See Fig. 33. Fig. 33 Lightly lubricate Lightly lubricate threads Lightly lubricate contact area on trigger face Apply part no. 514–767 Form-A-Gasket Sealant to the front area of the gun where the baffle sits and to the baffle protrusion.
- Page 20 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.
- Page 21 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. Fig. 38 8.
- Page 22 13. Install the spring (15) and fluid adjustment nut (6). Tighten 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.
- Page 23 NOTE: See Fig. 34, page 19, for the parts that need to be lubricated. Tighten to 25–35 in-lbs (2.8–4.0 N m) Tighten to 10–15 in–lb (1.1–1.7 N.m) U-cup (33) lips face air valve (14) U-cup (32) lips face spring (16) Tighten packing nut as needed for fluid tight seal Fig.
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Page 24: Parts Drawing
Ref No. 13 Fan Air Valve Assembly Includes items 13a–13d Ref No. 49 Activator Valve Assembly Includes items 49a–49r Tighten to 25–35 in–lb (2.8–4.0 N.m) NOTE: See the Service section for additional assembly information. Parts Drawing 02765A... -
Page 25: Parts List
Part No. 949–239, Series C Optimiser 2K HVLP Spray Gun Part No. Description 238–139 GUN BODY 190–247 PLATE, gun 185–761 TRIGGER, gun 625–723 PIN, pivot 203–953 SCREW, lock; No. 10–24 UNC-2A x 0.375” 188–490 NUT, fluid adjustment 185–745 KNOB, fluid adjustment 275–851 BAFFLE, pattern 276–278... -
Page 26: Technical Data
Technical Data Maximum Working Fluid and Air Pressure ....Weight ......Air Inlet . - Page 27 Notes...
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Page 28: The Graco Warranty And Disclaimers
The Graco Warranty 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 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.