Graco FinishPro II 395

1. Sprayer Won't Operate Sprayer Won't Operate

From 311911 rev E, page 8

1. 1. Pressure control knob setting. Motor will not run if set at minimum (fully counter-clockwise). Slowly increase pressure setting to see if motor starts.
2. 2. Spray tip or fluid filter may be clogged. Relieve pressure , page 7. Then clear clog or clean gun filter. Refer to gun instruction manual, 311937.

From 311911 rev E, page 8

1. 1. Pump frozen or hardened paint Thaw sprayer if water or water-based paint has fro- zen in sprayer. Place sprayer in warm area to thaw. Do not start sprayer until thawed completely. If paint hardened (dried) in sprayer, replace pump packings. See page 13, Displacement Pump Replacement .
2. 2. Displacement pump connecting rod pin. Pin must be completely pushed into connecting rod and retaining spring must be firmly in groove or pump pin. Push pin into place and secure with spring retainer. See page 13, Displacement Pump Replacement .
3. 3. Motor. Remove drive housing assembly. See page 15, Drive Hous- ing Replacement . Try to rotate fan by hand. Replace motor if fan won't turn. See page 34, Motor Replacement .

From 311911 rev E, page 8

1. 1. Power/function selector. Ensure selection is AA.
2. 2. Spray air pressure regulator may be closed (FinishPro 395) Pull air regulator to unlock and turn clockwise to open.
3. 3. Air valve at gun may be closed Turn air regulator counter-clockwise to open.

From 311911 rev E, page 8

1. 1. Electric supply. Meter must read 105-130 Vac for 110-120 Vac models and 210-255 Vac for 230 Vac mod- els. Reset building circuit breaker, replace building fuses. Try another outlet.
2. 2. Extension cord. Check extension cord continuity with volt meter. Replace extension cord. Use shorter extension cord.
3. 3. Sprayer power supply cord. Inspect for damage such as broken insula- tion or wires. Replace power supply cord. See page 21, Power Cord Replacement .
4. 4. Fuse (FinishPro 390). Check replaceable fuse on control board (next to ON/OFF switch). Replace fuse after completing motor inspection. See page 23, Fuse Replacement .
5. 5. Motor leads are securely fastened and properly connected to control board. Replace loose terminals; crimp to leads. Be sure ter- minals are firmly connected. Clean circuit board terminals. Securely reconnect leads.
6. 6. Motor thermal switch. Yellow motor leads must have continuity through thermal switch. Replace motor. See page 34, Motor Replacement .
7. 7. Brush cap missing or loose brush lead connections. Install brush cap or replace brushes if leads are dam- aged. See page 18, Motor Brush Replacement .
8. 8. Brush length which must be 1/4 in. (6mm) minimum. NOTE: Brushes do not wear at the same rate on both sides of motor. Check both brushes. Replace brushes. See page 18, Motor Brush Replacement .
9. 9. Motor armature commutator for burn spots, gouges and extreme rough- ness. Remove motor and have motor shop resurface com- mutator if possible. See page 34, Motor Replace- ment .
10. 10. Motor armature for shorts using armature tester (growler) or perform spin test, page 16. Replace motor. See page 34, Motor Replacement .
11. 11. Pressure control not plugged in to control board. Insert pressure control connector into control board.

From 311911 rev E, page 9

1. 1. Worn spray tip. Relieve pressure , page 7. Replace tip. Refer to gun instruction manual, 311937.
2. 2. Verify pump does not continue to stroke when gun trigger is released. Service pump. See page 13, Displacement Pump Replacement .
3. 3. Prime valve leaking. Relieve pressure , page 7. Then repair prime valve. See page 28, Pressure Control Replacement .
4. 4. Suction hose connections. Tighten any loose connections. Check o-rings on suction hose swivel.
5. 5. Electric supply with volt meter. Meter must read 105-130 Vac for 110-120 Vac models and 210-255 for 240 Vac models. Low voltages reduce sprayer performance. Reset building circuit breaker; replace building fuse. Repair electrical outlet or try another outlet.
6. 6. Extension cord size and length. Replace with a correct, grounded extension cord. See page 6 , Grounding and Electric Require- ments.
7. 7. Leads from motor to circuit board for damaged or loose wire connectors. Inspect wiring insulation and termi- nals for signs of overheating. Be sure male terminal pins are centered and firmly connected to female terminals. Replace any loose terminals or damaged wiring. Securely reconnect terminals.
8. 8. Worn motor brushes which must be 1/4 in. (6 mm) minimum. Replace brushes. See page 18. Motor Brush Replacement .
9. 9. Motor brushes binding in brush hold- ers. Clean brush holders. Remove carbon dust by using compressed air to blow out brush dust.
10. 10. Low stall pressure. Turn pressure control knob fully clockwise. Replace pressure control assembly. See page 28, Pressure Control Assembly Replacement .
11. 11. Motor armature for shorts by using an armature tester (growler) or per- form spin test, page 16. Replace motor. See page 34, Motor Replacement .

From 311911 rev E, page 10

1. 1. Prime Valve Open. Close prime valve.
2. 2. Paint supply. Refill and reprime pump.
3. 3. Intake strainer clogged. Remove and clean, then reinstall.
4. 4. Suction hose leaking air. Tighten nut. Check o-rings on swivel.
5. 5. Intake valve ball and piston ball are seating properly. See Pump Manual 309250. Strain paint before using to remove particles that could clog pump.
6. 6. Leaking around throat packing nut which may indicate worn or damaged packings. See Pump Manual 309250.
7. 7. Pump rod damaged. See Pump Manual 309250.

From 311911 rev E, page 11

1. 1. Displacement pump pin damaged or missing. Replace pump pin if missing. Be sure retaining spring is fully in groove all around connecting rod. See page 13, Displacement Pump Replacement .
2. 2. Connecting rod assembly for dam- age. Replace connecting rod assembly. See page 13, Displacement Pump Replacement .
3. 3. Gears or drive housing. Inspect drive housing assembly and gears for damage and replace if necessary. See page 15, Drive Housing Replacement .

From 311911 rev E, page 11

1. 1. Be sure ambient temperature where sprayer is located is not more than 115°F (46°C) and sprayer is not located in direct sun. Move sprayer to shaded, cooler area if possible.
2. 2. Motor has burned windings indicated by removing positive (red) brush and seeing burned adjacent commutator bars. Replace motor. See page 34, Motor Replacement .
3. 3. Tightness of pump packing nut. Overtightening tightens packings on rod, restricts pump action and dam- ages packings. Loosen packing nut. Check for leaking around throat. Replace pump packings if necessary. See pump manual 309250.

From 311911 rev E, page 11

1. 1. Air valve at gun may be closed. Turn air valve counter-clockwise to open.
2. 2. Sprayer air regulator may be closed (FinishPro 395) Pull to unlock and turn air regulator clockwise to open.
3. 3. Air connections may be loose. Check all connections for leaking air.

From 311911 rev E, page 11

1. 4. Damaged (leaking) air supply hose. Replace air supply hose.
2. 5. Air intake filter clogged. Clean or replace air intake filter kit.
3. 6. Mechanical air unloader stuck open. Replace mechanical air unloader.
4. 7. Electrical air unloader stuck open. Replace electrical air unloader.

From 311911 rev E, page 12

1. 1. Power/function selector switch Set function selector switch to AA; replace switch.
2. 2. Voltage to compressor below 105 Vac for 110 - 120 Vac models or below 210 Vac for 240 Vac models Try another outlet. Reduce extension cord length or increase extension cord gauge.
3. 3. Loose power connections Verify all connections are firm.
4. 4. Excessive head pressure (compres- sor hums) Moisture frozen in air supply line.
5. 5. Excessive head pressure (compres- sor hums) Wait for air pressure to bleed to zero.
6. 6. Excessive head pressure (compres- sor hums) Electrical air unloader stuck closed. Replace electrical air unloader.
7. 7. Excessive head pressure (compres- sor hums) Open air regulator (FinishPro 395) Install air line Do Startup , Operation Manual 311905
8. 8. Compressor thermal switch is open. Ensure ambient temperature is below 115 °F (46 °C). Move sprayer to shaded, cooler area.
9. 9. Low compressor performance. Worn compressor; repair compressor with Compressor Service Kit 288723.

From 311911 rev E, page 12

1. 1. Air cap air ports clogged. Soak in solvent to clean.
2. 2. Air cap worn. Replace air cap.
3. 3. Worn spray tip. Relieve pressure , page 7. Replace tip. Refer to gun instruction manual, 311937.

From 311911 rev E, page 12

1. 1. Water in air line. Add Water Separator Kit 289535 to air line.

From 311911 rev E, page 12

1. Sprayer Won't Operate Sprayer Won't Operate

From 333126 rev A, page 13

1. 1. Pressure control knob setting. Motor will not run if set at minimum (fully counter-clockwise). Slowly increase pressure setting to see if motor starts.
2. 2. Spray tip or fluid filter may be clogged. Relieve pressure , page 11. Then clear clog or clean gun filter. Refer to gun instruction manual.

From 333126 rev A, page 13

1. 1. Pump frozen or hardened paint. Thaw sprayer if water or water-based paint has fro- zen in sprayer. Place sprayer in warm area to thaw. Do not start sprayer until thawed completely. If paint hardened (dried) in sprayer, replace pump packings. See page 18, Displacement Pump Replacement .
2. 2. Displacement pump connecting rod pin. Pin must be completely pushed into connecting rod and retaining spring must be firmly in groove or pump pin. Push pin into place and secure with spring retainer. See page 18, Displacement Pump Replacement .
3. 3. Motor. Remove drive housing assembly. See page 20, Drive Housing Replacement . Try to rotate fan by hand. Replace motor if fan won't turn. See page 35, Motor Replacement .

From 333126 rev A, page 13

1. 1. Power/function selector. Ensure selection is AA.
2. 2. Spray air pressure regulator may be closed. Pull air regulator to unlock and turn clockwise to open.
3. 3. Air valve at gun may be closed. Turn air regulator counter-clockwise to open.

From 333126 rev A, page 13

1. 1. Electric supply. Meter must read 105-130 Vac for 110-120 Vac mod- els and 210-255 Vac for 230 Vac models. Reset building circuit breaker, replace building fuses. Try another outlet.
2. 2. Extension cord. Check extension cord continuity with volt meter. Replace extension cord. Use shorter extension cord.
3. 3. Sprayer power supply cord. Inspect for damage such as broken insula- tion or wires. Replace power supply cord. See page 25, Power Cord Replacement .
4. 4. Motor leads are securely fastened and properly connected to control board. Replace loose terminals; crimp to leads. Be sure terminals are firmly connected. Clean circuit board terminals. Securely reconnect leads.
5. 5. Motor thermal switch. Yellow motor leads must have continuity through thermal switch. Replace motor. See page 35, Motor Replacement .
6. 6. Brush cap missing or loose brush lead connections (FinishPro II 395 only). Install brush cap or replace brushes if leads are damaged. See page 23, Motor Brush Replace- ment .
7. 7. Brush length which must be 1/4 in. (6mm) minimum (FinishPro II 395 only). NOTE: Brushes do not wear at the same rate on both sides of motor. Check both brushes. Replace brushes. See page 23, Motor Brush Replacement .
8. 8. Motor armature commutator for burn spots, gouges and extreme rough- ness. Remove motor and have motor shop resurface commutator if possible. See page 35, Motor Replacement .
9. 9. Motor armature for shorts using armature tester (growler) or perform spin test, page 21. Replace motor. See page 35, Motor Replacement .
10. 10. Pressure control not plugged in to control board. Insert pressure control connector into control board.

From 333126 rev A, page 14

1. 1. Worn spray tip. Relieve pressure , page 11. Replace tip. Refer to gun instruction manual, 311937.
2. 2. Verify pump does not continue to stroke when gun trigger is released. Service pump. See page 18, Displacement Pump Replacement .
3. 3. Prime valve leaking. Relieve pressure , page 11. Then repair prime valve. See page 31, Pressure Control Replace- ment .
4. 4. Suction hose connections. Tighten any loose connections. Check o-rings on suction hose swivel.
5. 5. Electric supply with volt meter. Meter must read 105-130 Vac for 110-120 Vac models and 210-255 for 240 Vac models. Low voltages reduce sprayer performance. Reset building circuit breaker; replace building fuse. Repair electrical outlet or try another outlet.
6. 6. Extension cord size and length. Replace with a correct, grounded extension cord. See page 10 , Grounding and Electric Requirements.
7. 7. Leads from motor to circuit board for damaged or loose wire connectors. Inspect wiring insulation and termi- nals for signs of overheating. Be sure male terminal pins are centered and firmly connected to female terminals. Replace any loose terminals or damaged wiring. Securely reconnect terminals.
8. 8. Worn motor brushes which must be 1/4 in. (6 mm) minimum. Replace brushes. See page 23. Motor Brush Replacement .
9. 9. Motor brushes binding in brush hold- ers. Clean brush holders. Remove carbon dust by using compressed air to blow out brush dust.
10. 10. Low stall pressure. Turn pressure control knob fully clockwise. Replace pressure control assembly. See page 31, Pressure Control Assembly Replacement .
11. 11. Motor armature for shorts by using an armature tester (growler) or per- form spin test, page 21. Replace motor. See page 35, Motor Replacement .

From 333126 rev A, page 15

1. 1 Close prime valve.
2. 2 Refill and reprime pump.
3. 3 Remove and clean, then reinstall.
4. 4 Tighten nut. Check o-rings on swivel.
5. 5 See Pump Manual 309250. Strain paint before using to remove particles that could clog pump.
6. 6 See Pump Manual 309250.
7. 7 See Pump Manual 309250.

From 333126 rev A, page 16

1. 1 Replace pump pin if missing. Be sure retaining spring is fully in groove all around connecting rod. See page 18, Displacement Pump Replacement .
2. 2 Replace connecting rod assembly. See page 18, Displacement Pump Replacement .
3. 3 Inspect drive housing assembly and gears for damage and replace if necessary. See page 20, Drive Housing Replacement .

From 333126 rev A, page 16

1. 1 Move sprayer to shaded, cooler area if possible.
2. 2 Replace motor. See page 35, Motor Replacement .
3. 3 Loosen packing nut. Check for leaking around throat. Replace pump packings if necessary. See pump manual 309250.

From 333126 rev A, page 16

1. 1 Turn air valve counter-clockwise to open.
2. 2 Pull to unlock and turn air regulator clockwise to open.
3. 3 Check all connections for leaking air.
4. 4 Replace air supply hose.
5. 5 Clean or replace air intake filter kit.
6. 6 Replace mechanical air unloader.
7. 7 Replace electrical air unloader.

From 333126 rev A, page 16

1. 1. Power/function selector switch. Set function selector switch to AA; replace switch.
2. 2. Voltage to compressor below 105 Vac for 110 - 120 Vac models or below 210 Vac for 240 Vac models. Try another outlet. Reduce extension cord length or increase extension cord gauge.
3. 3. Loose power connections. Verify all connections are firm.
4. 4. Excessive head pressure (compres- sor hums). Moisture frozen in air supply line.
5. 5. Excessive head pressure (compres- sor hums). Wait for air pressure to bleed to zero.
6. 6. Excessive head pressure (compres- sor hums). Electrical air unloader stuck closed. Replace electrical air unloader.
7. 7. Excessive head pressure (compres- sor hums). Open air regulator. Install air line. Do Startup , Operation Manual 311905
8. 8. Compressor thermal switch is open. Ensure ambient temperature is below 115 °F (46 °C). Move sprayer to shaded, cooler area.
9. 9. Low compressor performance. Worn compressor; repair compressor with Compressor Service Kit 288723.

From 333126 rev A, page 17

1. 1. Air cap air ports clogged. Soak in solvent to clean.
2. 2. Air cap worn. Replace air cap.
3. 3. Worn spray tip. Relieve pressure , page 11. Replace tip. Refer to gun instruction manual.

From 333126 rev A, page 17

1. 1. Water in air line. Add Water Separator Kit 289535 to air line and inline water filter kit 24U981 (5 Pack), 24U982 (25 Pack).

From 333126 rev A, page 17

1. 1. Leak in air line. Check all air connections. Make sure there are no leaks.
2. 2. Pressure switch wore out. Replace pressure switch.
3. 3. Pressure relief valve worn out. Replace pressure relief valve.

From 333126 rev A, page 17

1. 1. Pressure control knob setting. Motor will not run if set at minimum (fully counter-clockwise). Slowly increase pressure setting to see if motor starts.
2. 2. Spray tip or fluid filter may be clogged. Relieve pressure , page 7. Then clear clog or clean gun filter. Refer to gun instruction manual, 311937.

From 311911 rev E, page 8

1. 1. Pump frozen or hardened paint Thaw sprayer if water or water-based paint has fro- zen in sprayer. Place sprayer in warm area to thaw. Do not start sprayer until thawed completely. If paint hardened (dried) in sprayer, replace pump packings. See page 13, Displacement Pump Replacement .
2. 2. Displacement pump connecting rod pin. Pin must be completely pushed into connecting rod and retaining spring must be firmly in groove or pump pin. Push pin into place and secure with spring retainer. See page 13, Displacement Pump Replacement .
3. 3. Motor. Remove drive housing assembly. See page 15, Drive Hous- ing Replacement . Try to rotate fan by hand. Replace motor if fan won't turn. See page 34, Motor Replacement .

From 311911 rev E, page 8

1. 1. Power/function selector. Ensure selection is AA.
2. 2. Spray air pressure regulator may be closed (FinishPro 395) Pull air regulator to unlock and turn clockwise to open.
3. 3. Air valve at gun may be closed Turn air regulator counter-clockwise to open.

From 311911 rev E, page 8

1. Pump rod damage. Repair pump. See pump manual.
2. Low stall pressure. Turn pressure knob fully clockwise. Make sure pressure control knob is properly installed to allow full clockwise position. If problem persists, replace pressure transducer.
3. Piston packings are worn or damaged. Replace packings. See pump manual.
4. O-ring in pump is worn or damaged. Replace o-ring. See pump manual.
5. Intake valve ball is packed with material. Clean intake valve. See pump manual.
6. Large pressure drop in hose with heavy materials. Reduce overall length of hose.
7. Check extension cord for correct size. See Extension Cords , page 9.
8. Loose motor brushes and terminals. Tighten terminal screws. Replace brushes if leads are damaged.
9. Worn motor brushes. (Brushes must be 1/2 in. [13mm] minimum length.) Replace brushes.
10. Broken and misaligned motor brush springs. Rolled portion of spring must rest squarely on top of brush. Replace spring if broken. Realign spring with brush.
11. Motor brushes are binding in brush holders. Clean brush holders, remove carbon dust with a small cleaning brush. Align brush lead with slot in brush holder to assure free vertical brush movement.

From 334730 rev F, page 28

1. Throat packing nut is loose. Remove throat packing nut spacer. Tighten throat packing nut just enough to stop leakage.
2. Throat packings are worn or damaged. Replace packings. See pump manual.
3. Displacement rod is worn or damaged. Replace rod. See pump manual.

From 334730 rev F, page 28

1. Air in pump or hose. Check and tighten all fluid connections. Cycle pump as slowly as possible during priming.
2. Spray tip is partially clogged. Clear tip. See Clear Tip Clog , page 20.
3. Fluid supply is low or empty. Refill fluid supply. Prime pump. See pump manual. Check fluid supply often to prevent running pump dry.

From 334730 rev F, page 29

1. Air in pump or hose. Check and tighten all fluid connections. Cycle pump as slowly as possible during priming.
2. Intake valve is leaking. Clean intake valve. Be sure ball seat is not nicked or worn and that ball seats well. Reassemble valve.
3. Pump packings are worn. Replace pump packings. See pump manual.
4. Paint is too thick. Thin the paint according to supplier recommendations.

From 334730 rev F, page 29

1. Pump packing nut too tight. When pump packing nut is too tight the packings on the pump rod restrict pump action and overloads the motor. Loosen pump packing nut. Check for leaks around throat. If necessary, replace pump packings. See Pump manual.

From 334730 rev F, page 29

1. Spray tip worn. Follow Pressure Relief Procedure , page 10, then replace tip. See separate gun or tip manual.
2. Spray tip clogged. Relieve pressure. Check and clean spray tip.
3. Paint supply. Refill and reprime pump.
4. Intake strainer clogged. Remove and clean, then reinstall.
5. Intake valve ball and piston ball are not seating properly. Remove intake valve and clean. Check balls and seats for nicks; replace if necessary. See pump manual. Strain paint before using to remove particles that could clog pump.
6. Fluid filter or tip filter is clogged or dirty. Clean filter.
7. Prime valve leaking. Follow Pressure Relief Procedure , page 10, then repair prime valve.
8. Verify pump does not continue to stroke when gun trigger is released. (Prime valve not leaking.) Service pump. See pump manual.
9. Leaking around throat packing nut which may indicate worn or damaged packings. Replace packings. See pump manual. Also check piston valve seat for hardened paint or nicks and replace if necessary. Tighten packing nut/wet-cup.

From 334730 rev F