Graco 308-646 - Manuals

Setup WARNING If you supply your own hoses and spray gun, besure the hoses are electrically conductive, that thegun has a tip guard, and that each part is rated forat least 2750 psi (195 bar) Working Pressure. This is to reduce the risk of serious injury caused bystatic sparking, fluid injection or ...

308-646 7 Operation How to use the gun trigger safety When engaged, the gun safety latch prevents the gunfrom accidental triggering. See Fig. 3. WARNING INJECTION HAZARD If the gun still sprays when the gun trig-ger safety is locked, repair the gun. Seemanual 308–235, supplied. Fig. 3 1 2 Gun safety...

Operation How to use the RAC IV tip guard. WARNING INJECTION HAZARD To reduce the risk of serious injury,whenever you are instructed to relievepressure, follow the Pressure Relief Procedure on page 9. The tip guard alerts you to the risk and helps preventplacing any part of the body close to the spr...

308-646 9 Startup INJECTION HAZARDThe system pressure must be manuallyrelieved to prevent the system fromstarting or spraying accidentally. Fluid under high pressure can be injected through theskin and cause serious injury. To reduce the risk ofan injury from injection, splashing fluid, or movingpar...

12 308-646 Shutdown and Care WARNING INJECTION HAZARD To reduce the risk of serious injury,whenever you are instructed to relievepressure, follow the Pressure Relief Procedure on page 9. Shutdown and Care 1. Check the packing nut/wet-cup daily (102). Re-lieve pressure first. Keep the wet-cup 1/3 ful...

308-646 13 Flushing When to Flush 1. Before using a new sprayer: flush out the oilwhich was left in to protect pump parts. Before using water-base paint: flush with min-eral spirits followed by soapy water, and then aclean water flush. Before using oil-base paint: flush with mineralspirits only. 2. ...

14 308-646 Troubleshooting WARNING INJECTION HAZARD To reduce the risk of serious injury, whenever you are instructed to relieve pressure, follow thePressure Relief Procedure on page 9. Basic Problem Solving Check everything in the troubleshooting table before disassembling the sprayer. TYPE OF PROB...

Basic Problem Solving TYPE OF PROBLEM WHAT TO CHECKIf check is OK, go to next check WHAT TO DOWhen check is not OK, refer to this column Electrical (continued) 5. Check motor armature commutator for burn spots, gouges and extreme roughness. Re-move motor cover and brush inspection platesto check. Se...

18 308-646 Motor Test WARNING INJECTION HAZARD To reduce the risk of serious injury,whenever you are instructed to relievepressure, follow the Pressure Relief Procedure on page 9. For checking armature, motor winding and brush elec-trical continuity. Setup Remove the drive housing. See page 28. This...

General Repair Information WARNING INJECTION HAZARD To reduce the risk of serious injury,whenever you are instructed to relievepressure, follow the Pressure Relief Procedure on page 9. Tool List These are the tools required to service all parts of thesprayer. 3/16” Allen wrench: gear housing, legs, ...

Motor Brushes NOTE: Replace brushes when worn to about 0.5 in.(12.5 mm). Always check both brushes. Brush RepairKit 236–967, which includes spring clip 112–766, isavailable for motors manufactured by Pacific Scientific. NOTE: Replacement brushes may last only half aslong as the original ones. To max...

Displacement Pump Repair WARNING INJECTION HAZARD To reduce the risk of serious injury,whenever you are instructed to relievepressure, follow the Pressure Relief Procedure on page 9. NOTE: Packing Repair Kit 235–703 is available. Refer-ence numbers of parts included in the kit are markedwith an aste...

Displacement Pump Repair Intake valve repair (See Fig. 17) 1. Remove the suction hose. See Step 2, Removingthe pump. 2. Unscrew the intake valve (118). Remove the o-ring (119*), ball guide (120), stop pin (122*) andball (121*) from the valve. 3. Clean and inspect the parts for wear or damage.Replace...

Motor WARNING INJECTION HAZARD To reduce the risk of serious injury,whenever you are instructed to relievepressure, follow the Pressure Relief Procedure on page 9. NOTE: See Fig. 26 except where noted. 1. Relieve pressure. 2. Try to stop the pump with the piston rod (107) in itslowest position. To l...

Motor Start Board WARNING INJECTION HAZARD To reduce the risk of serious injury,whenever you are instructed to relievepressure, follow the Pressure Relief Procedure on page 9. NOTE: See Fig. 27 for this procedure. 1. Relieve pressure. 2. Remove the junction box screws (56) and lowerthe junction box ...

Drive Housing, Connecting Rod, Crankshaft WARNING INJECTION HAZARD To reduce the risk of serious injury,whenever you are instructed to relievepressure, follow the Pressure Relief Procedure on page 9. NOTE: Inspect parts as they are removed. Replaceparts that are worn or damaged. 1. Remove the displa...

Pressure Control WARNING INJECTION HAZARD To reduce the risk of serious injury,whenever you are instructed to relievepressure, follow the Pressure Relief Procedure on page 9. NOTE: See Fig. 30 for this procedure. NOTE: The pressure control (64) cannot be repairedor adjusted. If it has malfunctioned,...

308-646 31 Pressure Transducer WARNING INJECTION HAZARD To reduce the risk of serious injury,whenever you are instructed to relievepressure, follow the Pressure Relief Procedure on page 9. NOTE: See Fig. 31 for this procedure. 1. Remove the displacement pump. See page 22. 2. Use a pull–twist motion ...

Drain Valve WARNING INJECTION HAZARD To reduce the risk of serious injury,whenever you are instructed to relievepressure, follow the Pressure Relief Procedure on page 9. 44 42a 42b 43 45 Apply thread sealant Handle shownin closed position Apply greaseto face of base 42 Torque into pump manifold to 1...

Displacement Pump Parts Drawing and List Model 236–787, Series A Includes items 101 to 127 Ref No. Part No. Description Qty 101 187–611 MANIFOLD, pump 1 102 176–758 PACKING NUT 1 103* 176–757 GLAND, female, throat 1 104* 176–997 V–PACKING, plastic, throat 3 105* 176–755 V–PACKING, leather, throat 2 ...

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 32 REF 33 11 23 63 HOSE AND GUN NOT SHOWN IN PROPORTION TO SPRAYER 67 74 42c 42d 11b 14 4g INSIDE LABEL 35 OUT-SIDE LABEL 4f See detai...

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 MOTOR KIT Includes items 4a to 4g 1 4a. 100–069 . BALL, sst, 1/4” dia. 1 4b. 111–616 . TERMINAL, flat, 1/4” (f), 18 awg 2 4c. 1...

Technical Data Power Requirements 120 VAC,60Hz, . . . . . . . . . . . . . . . . . . . . 1 phase, 15 amp minimum Generator 3000 Watt minimum . . . . . . . . . . . . . . . . . . . . . . . . . . Working Pressure Range 0–2750 psi (0 – 195 bar) . . . . . . . . . Motor 1/2 hp . . . . . . . . . . . . . . ....