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manual abstract
c. Do not remove the third prong of the power supply cord plug, which is the grounding prong, and do not use an adapter. 6. Flush the pump to remove the lightweight oil which was left in the pump to protect it from rust. a. Before using water-base paint, flush with mineral spirits, followed by a soapy water flush, and then flush with clean water. b. Before using oil-base paint, flush with mineral spirits, only. c. See FLUSHING GUIDELINES, on page 12, for the flushing procedure. 7. Prepare the paint according to the manufacturer’s recommendations. a. Remove any skin that may have formed. b. Stir the paint to mix pigments. c. Strain the paint through a fine nylon mesh bag (available at most paint dealers) to remove particles that could clog the filter or spray tip. This is probably the most important step toward trouble- free spraying. . . SETUP PACKING NUT/WETCUP Keep filled with TSL Fig 1 FILTER DO NOT INSTALL A SHUT OFF DEVICE HERE 50 ft. (15.2 m) MAIN FLUID HOSE ON/OFF SWITCH PRESSURE CONTROL KNOB 3 ft (0.9 m) HOSE RAC IV DripLess TIP GUARD and SwitchTip OPERATION WARNING Pressure Relief Procedure 5. Engage the gun safety latch. To reduce the risk of serious bodily injury, including in-6. Open the pressure drain valve, having a container jection; splashing in the eyes or on the skin; injury from ready to catch the drainage. Leave the pressure moving parts or electric shock, always follow this pro-drain valve open until you are ready to operate the cedure whenever you shut off the sprayer, when sprayer again. checking or servicing any part of the spray system, Ifyou suspect that the spray tip or hose is completely when installing, cleaning or changing spray tips, and clogged,or thatpressure has not been fully relieved af whenever you stop spraying. terfollowing the steps above,VERY SLOWLYloosen 1. Engage the gun safety latch. the tip guard retaining nut or hose end coupling and re 2. Turn the ON/OFF switch to OFF. lieve pressure gradually. Then loosen the nut com 3. Unplug the power supply cord. pletely. Now clear the tip or hose obstruction. 4. Disengage the gun safety latch. Hold a metal part of the gun firmly to the side of a grounded metal pail, and trigger the gun to relieve pressure. . . OPERATION RAC IV DripLess TIP GUARD and SwitchTip Fig 2 1. Prime the sprayer with paint. a. Close the pressure drain valve. b. Don’t install the spray tip yet! c. Put the suction tube into the paint container. d. Turn the pressure adjusting knob all the way counterclockwise to lower the pressure e. Disengage the gun safety latch. f. Hold a metal part of the gun firmly against and aimed into a grounded metal waste container. SeeFig 3.Squeeze the trigger and hold it open, turn the sprayer ON, and slowly increase the pressure setting until the sprayer starts. Keep the gun triggered until all air is forced out of the system and the paint flows freely from the gun. Release the trigger and engage the gun safety latch. NOTE: If the pump is hard to prime, place a container under the pressure drain valve and open the valve. When fluid comes from the valve, close it. Then disengage the gun safety latch and proceed as in Step 1f, above. MAINTAIN FIRM METAL-TO-METAL CONTACT BETWEEN GUN AND GROUNDED METAL CONTAINER GROUND WIRE Fig 3 ON/OFF SWITCH PRESSURE CONTROL KNOB TURN CCW TO LOWER PRESURE PRESSURE DRAIN VALVE g. Check all fluid connections for leaks; relieve pressure before tightening connections. 2. Install the spray tip and tip guard a. Be sure the gun safety latch is engaged. b. Install the spray tip. If using the RAC IV, refer to manual 307–848, supplied with the gun, for installation instructions. 3. Adjusting the spray pattern (Refer to Fig 4. ) a. Increase the pressure setting just until spray from the gun is completely atomized. To avoid excessive overspray and fogging, and to decrease tip wear and extend the life of the sprayer, always use the lowest possible pressure needed to get the desired results. b. If more coverage is needed, use a larger tip rather than increasing the pressure. c. Test the spray pattern. To adjust the direction of the spray pattern, engage the gun safety latch and loosen the retaining nut. Position the tip guard horizontally for a horizontal pattern or vertically for a vertical pattern. Then tighten the retaining nut. SPOTTY PATTERN – INCREASE PRESSURE Fig 4 GOOD FULL PATTERN . . OPERATION SHUTDOWN AND CARE 4. Cleaning a Clogged Tip WARNING To reduce the risk of serious bodily injury from injection, use extreme caution when cleaning or changing spray tips. If the spray tip clogs while spraying, engage the gun safety latch immediately, then follow the procedure in Steps 4a to 4e, below. NEVER wipe off buildup around the spray tip until pressure is fully relieved and the gun safety latch is engaged. a. Clean the front of the tip frequently during operation. First relieve pressure; see page 9. Then use a solvent–soaked brush to clean the tip and to reduce fluid build up and tip clogging. b. If ...