Benutzeranleitung / Produktwartung 308-646 des Produzenten Graco Inc.
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INSTRUCTIONS–P ARTS LIST 308–646 Rev . B Supercedes Rev . A ELECTRIC, 120 V AC Performance 390 Airless Paint Sprayer 2750 psi (195 bar) Maximum Working Pressure Model 231–553, Series A Complete sprayer with hoses, gun, RAC IV DripLess T ip Guard and SwitchT ip GRACO INC.
T able of Contents W arnings 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Component Identification and Function 5 . . . . . . . . . . . Setup 6 . . . . . . . . . . . . . . . . . . . . . . .
TOXIC FLUID HAZARD Hazardous fluid or toxic fumes can cause serious injury or death if splashed in the eyes or on the skin, inhaled, or swallowed. Know the specific hazards of the fluid you are using. Store hazardous fluid in an approved container .
EQUIPMENT MISUSE HAZARD Equipment misuse can cause the equipment to rupture or malfunction and result in serious injury . This equipment is for professional use only . Read all instruction manuals, tags, and labels before operating the equipment.
308-646 5 05993 Component Function and Identification C Fig. 1 G E F D A K M B H N J L 05963 A Motor DC motor , 120 V ac, 15A, 1 phase B Drive Assembly T ransfers power from DC motor to the displaceme.
Setup W ARNING If you supply your own hoses and spray gun, be sure the hoses are electrically conductive, that the gun has a tip guard, and that each part is rated for at least 2750 psi (195 bar) Working Pressure .
308-646 7 Operation How to use the gun trigger safety When engaged, the gun safety latch prevents the gun from accidental triggering. See Fig. 3. W ARNING INJECTION HAZARD If the gun still sprays when the gun trig - ger safety is locked, repair the gun.
Operation How to use the RAC IV tip guard. W ARNING INJECTION HAZARD T o reduce the risk of serious injury , whenever you are instructed to relieve pressure, follow the Pressure Relief Procedure on page 9. The tip guard alerts you to the risk and helps prevent placing any part of the body close to the spray tip.
308-646 9 Startup INJECTION HAZARD The system pressure must be manually relieved to prevent the system from starting or spraying accidentally . Fluid under high pressure can be injected through the skin and cause serious injury .
10 308-646 Startup W ARNING FIRE AND EXPLOSION HAZARD T o reduce the risk of static sparking and splashing when priming or flushing the system, hold a metal part of the gun firmly to the side of a grounded metal pail before triggering the gun. 6. T o prime the hose , lower the pressure to reduce splashing.
308-646 11 Startup 05993 Fig. 9 1 3 4 2 32 33 64 28 74 102 52 1/4 npsm(m) fluid outlet Rotate clockwise to increase pressure Do not install any shutof f device here Fill 1/3 full with TSL Shown in clo.
12 308-646 Shutdown and Care W ARNING INJECTION HAZARD T o reduce the risk of serious injury , whenever you are instructed to relieve pressure, follow the Pressure Relief Procedure on page 9. Shutdown and Care 1. Check the packing nut/wet-cup daily (102).
308-646 13 Flushing When to Flush 1. Before using a new sprayer: flush out the oil which was left in to protect pump parts. Before using water-base paint: flush with min - eral spirits followed by soapy water , and then a clean water flush. Before using oil-base paint: flush with mineral spirits only .
14 308-646 T roubleshooting W ARNING INJECTION HAZARD T o reduce the risk of serious injury , whenever you are instructed to relieve pressure, follow the Pressure Relief Procedure on page 9. Basic Problem Solving Check everything in the troubleshooting table before disassembling the sprayer .
Basic Problem Solving TYPE OF PROBLEM WHA T T O CHECK If check is OK, go to next check WHA T T O DO When check is not OK, refer to this column Electrical (continued) 5. Check motor armature commutator for burn spots, gouges and extreme roughness.
16 308-646 Intermediate Problem Solving TYPE OF PROBLEM WHA T T O CHECK If check is OK, go to next check WHA T T O DO When check is not OK, refer to this column Low output (continued) 3. Release gun trigger . Observe resting position of pump rod (107).
Intermediate Problem Solving TYPE OF PROBLEM WHA T T O CHECK If check is OK, go to next check WHA T T O DO When check is not OK, refer to this column Spray Pattern V ariations 1. Spray tip worn beyond sprayer pressure capa - bility .
18 308-646 Motor T est W ARNING INJECTION HAZARD T o reduce the risk of serious injury , whenever you are instructed to relieve pressure, follow the Pressure Relief Procedure on page 9. For checking armature, motor winding and brush elec - trical continuity .
General Repair Information W ARNING INJECTION HAZARD T o reduce the risk of serious injury , whenever you are instructed to relieve pressure, follow the Pressure Relief Procedure on page 9. T ool List These are the tools required to service all parts of the sprayer .
Motor Brushes NOTE: Replace brushes when worn to about 0.5 in. (12.5 mm). Always check both brushes. Brush Repair Kit 236–967, which includes spring clip 1 12–766, is available for motors manufactured by Pacific Scientific.
308-646 21 Motor Brushes 9. T est the brushes. a. Remove the pump connecting rod pin (17). See Fig. 18, page 22. b. With the sprayer OFF , turn the pressure con - trol knob fully counterclockwise to minimum pressure. Plug in the sprayer . c. T urn the sprayer ON.
Displacement Pump Repair W ARNING INJECTION HAZARD T o reduce the risk of serious injury , whenever you are instructed to relieve pressure, follow the Pressure Relief Procedure on page 9. NOTE: Packing Repair Kit 235–703 is available.
Displacement Pump Repair Intake valve repair (See Fig. 17) 1. Remove the suction hose. See Step 2, Removing the pump. 2. Unscrew the intake valve (1 18). Remove the o-ring (1 19*), ball guide (120), stop pin (122*) and ball (121*) from the valve.
Displacement Pump Repair 3. T ighten the nut (1 10) onto the piston valve (108) to 5 in-lb (0.57 N.m). See Fig. 20. NOTE: Note the alignment of the piston (108) to the nut (1 10). Maintain this alignment through Step 8.
Displacement Pump Repair 1 1. Place a new o-ring (1 16*) firmly in the cylinder groove. See Fig. 22. 12. Coat the piston rod and packings with oil. Carefully slide the assembly into the top of the cylinder (1 15) . See Fig.
Motor W ARNING INJECTION HAZARD T o reduce the risk of serious injury , whenever you are instructed to relieve pressure, follow the Pressure Relief Procedure on page 9. NOTE: See Fig. 26 except where noted. 1. Relieve pressure.
Motor Start Board W ARNING INJECTION HAZARD T o reduce the risk of serious injury , whenever you are instructed to relieve pressure, follow the Pressure Relief Procedure on page 9. NOTE: See Fig. 27 for this procedure. 1.
Drive Housing, Connecting Rod, Crankshaft W ARNING INJECTION HAZARD T o reduce the risk of serious injury , whenever you are instructed to relieve pressure, follow the Pressure Relief Procedure on page 9. NOTE: Inspect parts as they are removed.
Drive Housing, Connecting Rod, Crankshaft 6 19 15 13 64 11 19 12a 12 12b 59 11 a 4a A 34 31 REF A 16 47 Fig. 29 1 T orque to 80 in–lb (9 N.m) 3 2 Quantity of three Quantity of one 1 1 2 3 Apply a total of 3 fl. oz.(29 cc) of grease to gears.
Pressure Control W ARNING INJECTION HAZARD T o reduce the risk of serious injury , whenever you are instructed to relieve pressure, follow the Pressure Relief Procedure on page 9. NOTE: See Fig. 30 for this procedure. NOTE: The pressure control (64) cannot be repaired or adjusted.
308-646 31 Pressure T ransducer W ARNING INJECTION HAZARD T o reduce the risk of serious injury , whenever you are instructed to relieve pressure, follow the Pressure Relief Procedure on page 9. NOTE: See Fig. 31 for this procedure. 1. Remove the displacement pump.
Drain V alve W ARNING INJECTION HAZARD T o reduce the risk of serious injury , whenever you are instructed to relieve pressure, follow the Pressure Relief Procedure on page 9.
Displacement Pump Parts Drawing and List Model 236–787, Series A Includes items 101 to 127 Ref No. Part No. Description Qty 101 187–61 1 MANIFOLD, pump 1 102 176–.
Sprayer Parts Drawing Model 231–553, Series A O4658 33 20 4a 12 18 15 16 45 37 29 32 25 12b 12a 64 30 19 19 6 17 31 34 21 38 36 46 4 39 28 56 43 42 42a 42b 4e 44 REF .
308-646 35 Sprayer Parts List Model 231–553, Series A Includes items 3 to 89 as listed below Ref. No. Part No. Description Qty . Ref. No. Part No. Description Qty . 4 { 236–965 MOT OR KIT Includes items 4a to 4g 1 4a. 100–069 . BALL, sst, 1/4” dia.
T echnical Data Power Requirements 120 V AC,60Hz, . . . . . . . . . . . . . . . . . . . . 1 phase, 15 amp minimum Generator 3000 W att minimum . . . . . . . . . . . . . . . . . . . . . . . . . . Working Pressure Range 0–2750 psi (0 – 195 bar) .
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