Hitachi 308640 - Manual

308640 5 Installation Connect the Air Line 1. Install an air line filter (A) to ensure a clean, dry airsupply to the gun. Dirt and moisture in the line canruin the appearance of your finished piece. SeeFig. 1. 2. Install an air pressure regulator (L) on the gun airsupply line to control the air pres...

6 308640 Installation Ground the System WARNING FIRE AND EXPLOSION HAZARDImproper grounding could cause staticsparking, which could cause a fire orexplosion. To reduce the risk of propertydamage or serious injury, follow thegrounding instructions below. The following grounding instructions are minim...

308640 7 Operation Safety WARNING INJECTION HAZARDRemember, this is not an air spray gun.For your safety be sure to read andfollow the Warnings on pages 2 and 3 and throughout the text of this instruction manual. Keep the wallet sized warning card 179960, pro-vided with the gun, with the operator of...

8 308640 Operation How the Air-Assisted Spray Gun Operates The air-assisted spray gun combines airless and airspraying concepts. The spray tip shapes the fluid intoa fan pattern, as does a conventional airless spray tip.Air from the air cap further atomizes the fluid andcompletes the atomization of ...

308640 9 Operation Adjust the Spray Pattern WARNING RECOIL HAZARDDue to the very high pressure fluidemitted, a strong recoil action will occurwhen you trigger this gun. If you are unprepared, your hand could be forced backtoward your body or you could lose your balanceand fall, resulting in serious ...

10 308640 Operation Apply the Fluid When applying the fluid, keep the gun a consistentdistance, about 8 to 12 inches (200 to 300 mm) fromthe surface of the object being sprayed. Always holdthe gun at a right angle from the surface. Do not makean arc with the gun as it causes an uneven coat offluid. ...

308640 11 Operation Clean the Spray Gun and System Daily WARNING INJECTION HAZARDTo reduce the risk of an injection injuryor splashing fluid in the eyes or on theskin: Follow the Pressure Relief Procedure on page7 before cleaning, removing, or installing aspray tip and whenever you are instructed to...

12 308640 Operation Flush the Gun Daily WARNING INJECTION HAZARDTo reduce the risk of a fluid injectioninjury, follow the Pressure Relief Proce-dure on page 7 before cleaning, removing, or installing a spray tip and wheneveryou are instructed to relieve pressure. WARNING To reduce the risk of seriou...

14 308640 Troubleshooting WARNING INJECTION HAZARDTo reduce the risk of a fluid injectioninjury, follow the Pressure Relief Proce-dure on page 7 before checking or servicing any of the system equipment and when-ever you are instructed to relieve pressure. NOTE: Check all possible remedies in the tro...

308640 15 Troubleshooting Spray Pattern Troubleshooting Problem Cause Solution Fluttering or spitting spray Insufficient fluid supply Air in paint supply line Attempting to “feather” (partially trig-ger) the gun. Adjust fluid regulator or fill fluid supplytank. Check, tighten siphon hose connec-tion...

16 308640 Service WARNING INJECTION HAZARDTo reduce the risk of a fluid injectioninjury, follow the Pressure Relief Proce-dure on page 7 before checking or servicing any of the system equipment and when-ever you are instructed to relieve pressure. NOTE: Follow the Service Notes in Fig. 8 when reasse...

18 308640 Parts 1 2 3 5 6 7 8 9 25 24 23 11 12 13 14 15 16 17 30 19 18 10a 10b 29 5b 5a 34 26 1 Apply high strength sealant to threads. Torque to 23–27 ft-lb (31–37 N m) Gasket (18) must be replaced if diffuser-seat (15) is removed orreplaced to avoid fluid leakage. Gasket (17) must be replaced if f...

308640 19 Parts Use Only Genuine Graco Parts and Accessories Part No. 238402, 238852, 238883, and 241070 Ref.No. Part No. Description Qty. Ref.No. Part No. Description Qty. 1 238750 BODY, gun 1 2 106917 ADAPTER, air; Included with Gun 238402, 238883, and 241070 only 1 113367 COUPLING, air, quick-dis...

22 308640 Spray Tip Selection Charts NOTE: Part No. 238755 Fluid Needle and 224855 Diffuser-seat must be used with GG4 tips larger than 0.025 in. (0.635mm). Standard Spray Tips, for use with Air Cap 239781 Fan Width *Light to OrificeSize Fan Widthat 12”(300 mm) Light to MediumViscosity *HeavyViscosi...

26 308640 Technical Data Maximum Working Fluid Pressure 4000 psi . . . . . . . . . (28 MPa, 280 bar) Maximum Working Air Pressure 100 psi . . . . . . . . . . . . . (0.7 MPa, 7 bar) Maximum Working Fluid Temperature . 120 _ F (49 _ C) Weight (less filter) 1.33 lb (0.59 Kg) . . . . . . . . . . . . . ....

308640 27 Accessories Use Only Genuine Graco Parts and Accessories Grounding Clamp and Wire 22201112 ga, 25 ft (7.6 m) wire High Pressure Ball Valves, Viton Seals 5000 psi (35 MPa, 350 bar) Maximum Working PressureCan be used as fluid drain valve. 210657 1/2 npt(m) 210658 3/8 npt(m) 210659 3/8 x 1/4...