Instruction/ maintenance manual of the product 312579K Graco
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Instr uctions-P ar ts AirPr o ™ Gra vity Feed Air s pra y Gun 312579K EN Con ventional, HVLP , and compliant guns f or specialty industrial applications. For pr ofessional use only . 100 psi (0.7 MP a, 7 bar) Maximum Air Inlet Pressure See page 3 f or model inf or mation.
2 312579K Contents Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Gra vity F eed with out Cup . . . . . . . . . . . . . . . . . . 3 Gra vity F eed with Plastic Cup . . . . . . . . . . . . . . . 3 Gra vity F eed with 3M ™ PPS ™ Cup .
Models 312579K 3 Models Grav ity Feed without Cup Grav ity Feed with Plastic Cup Gra vity Feed with 3M ™ PPS ™ Cup Orifice Size in. (mm) Con ventional HVL P Compliant Model Series Max. HVLP/Compliant Air Pressure psi (MP a, bar) Model Series Max. HVLP/Compliant Air Pressure psi (MP a, bar) Model Series Max.
Warnings 4 312579K Wa r n i n g s The f ollowing w ar nings are f or the setup , use, grounding, maintenance , and repair of this equipment. The e xclamat ion point symbol aler ts y ou to a general warning and the hazard symbols ref er to procedure-specif ic r isks.
Gun Selection 312579K 5 Gun Selection Con ventional Guns Excellent atomizati on and high production rates typically with some reduction in tr ansf er efficiency . HVLP Guns An HVLP gun is a high transf er efficiency gun which limits the air pre ssure at the air cap to 10 psi (0.
Setup 6 312579K Setup 1. Shut off the air supply . 2. Install a shutoff v alv e (not supplied) do wn- stream of the air regulator to shut off gun air . 3. Install an inline air f ilter (not su pplie d) to clean and dr y t he gun air supply . 4. Connect a clean, dr y , filtered air supply to the air inlet fitting.
Setup 312579K 7 Adjust Spra y P attern 1. Rotate the air cap to achie ve desired spr a y patter n. See F IG . 2. 2. T o achiev e full f an patter n, open the air control v alve b y tur ning the knob fully coun- terclockwise .
Operatio n 8 312579K Operation Pressure Relief Pr ocedure 1. T ur n off the gun air supply . 2. T r igger the gun to reliev e pressure . Appl y Fluid 1. Fill the cup with materi al. Do not fill past the full mar kings on cup . 2. T ur n on the shop air to the gun.
Daily Gun Maintenance 312579K 9 Dail y Gun Maintenance General T asks Fo l l o w t h e Pressure Relief Pr ocedure , page 8. • F requently lubr icate the gun moving par ts with a drop of non-silicone oil. • Do not disassemble the spra y gun if y ou are having a spr a y pat ter n problem.
Daily Gun Maintenance 10 312579K Clean Nozzle and Air Cap 1. Remov e air cap (13), trigger gun, remov e nozzle (11), and soak both in a compatible cleaning solution. 2. Clean air cap , nozzle, and front of the gun with a soft-bristle br ush dipped into com- patible solv ent.
Daily Gun Maintenance 312579K 11.
Daily Gun Maintenance 12 312579K T r oubleshooting Prob lem Cause Solution Spra y P atter n Nor mal patter n. No action necessar y . Spra y P atter n Dir ty or damaged air cap or fluid nozzle. Rotate air cap 180°. If patter n f ollows air cap , problem is in air cap (13).
Daily Gun Maintenance 312579K 13 Excessiv e air blo wing back Loose fluid nozzle (11). Ti ghten fluid nozzle (11). Damaged fluid nozzle seal (19). Replace seal (19). Excessiv e air leak behind trigg er . W or n u-cups/air v alve . Repair gun (Kit 289408).
Repair 14 312579K Repair See Pa r t s , page 16, f or callout references . Disassembl y 1. Unscrew retaining r ing (14) to remov e air cap (13b). Check o- r ings (13a and 13c) and replace if necessar y . 2. T r igger gun while unscr ewing nozzle (11) to pre vent needle damage .
Repair 312579K 15 Reassembl y 1. Install air control v alve assemb ly (5) with v alve turned fully counterclockwise to outer- most position. T orque to 85-90 in-lb (9.6-10.2 N•m). 2. Install air inlet v alve assemb ly (27) with v alve turned fully counterclockwise to outer- most position.
Parts 16 312579K Pa r t s Pull trigger bef ore installing nozzle (11). Inser t spreader ( 15) with tapered end f acing rear of gun. Inser t u-cup (16) with open end f acing front of gun. Apply lubricant. Apply low strength thread retainer . Apply thread sealant.
Parts 312579K 17 ★ Included in Gun Repair Kit 289790. ✖ Included in T r igger Repair Kit 289143 (contains 5 of each par t). + Included in Needle P ac king Repair Kit 289455 (contains 5 of each par t). * Included in Air V a lve Repair Kit 289408. ◆ Included in Air Cap Seal Kit 289791 (contains 5 of each par t).
Accessories 18 312579K Accessories Cups Repair Kits Air V alves Cleaning Kit 3M ™ PPS ™ Cups and Accessories T est Gaug e Hoses Tips P ar t No. Description 289797 Cup , aluminum, 23 oz (650 cc) 289802 Cup , aluminum , 34 oz (1 liter) 289770 Cup , plastic, 23 oz (650 cc) 192407 Cup Holder P ar t No.
Repair Kits 312579K 19 Repair Kits Without Grav ity Cup With Gravity Cup With 3M PPS Cup Needle Tips Model Spra y T ype Nozzle Size in. (mm) Air Cap Kit (13a-13c) Nozzle Kit (11, 19) Needle Assembl y Kit (9a-9c) Needle/ Nozzle Kit (9a-9c, 11, 19) Needle Tip Kit (9c, 5-pack ) 289002 Conv ention al 0.
Technical Data 20 312579K T echnical Data * Produces 10 psi (0.07 MP a, 0.7 bar) spra ying pressure at air cap . ** All readings we re taken with the f an valv e fully open (fan full siz e) at the assumed operator position. Sound pow er wa s tested per ISO 9614-2.
Technical Data 312579K 21.
All written and visual data cont ained in this document reflec ts the latest product information availab le at the time of publication. Graco reserve s the right to make changes at any time without notice. Original instructions. This manual contains English.
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