Graco 249691, 249690, 255113, 255110, 255114 User Manual

...

Repair

™

FinishPro

390/395

Airless/Air-Assisted Sprayer

- For the application of architectural paints and coatings -

Maximum Fluid Working Pressure: 3300 psi (227 bar, 22.7 MPa)

Maximum Air Working Pressure: 35 psi (2.4 bar, 0.24 MPa)

IMPORTANT SAFETY INSTRUCTIONS!

Read all warnings and instructions. Save these instructions. Contact Graco Customer Ser-

vice, your local Graco distributor or our website: www.graco.com, to obtain a manual in your language.

311911C

Models:

Region FinishPro 390 FinishPro 395

Europe CEE 7/7

Europe Multi Cord

Asia/Australia

Related Manuals:

311905

309250

311937

312100

FinishPro 395

249690 249691

255110 255111

255112 255113

255114 255115

255116 255117

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FinishPro 390

Graco Inc. P.O. Box 1441 Minneapolis, MN 55440-1441

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Warning

The following warnings are for the setup, use, grounding, maintenance and repair of this equipment. The exclamation point symbol alerts you to a general warning and the hazard symbol refers to procedure-specific risks. Refer back to these warnings. Additional, product-specific warnings may be found throughout the body of this manual where applicable.

WARNING

FIRE AND EXPLOSION HAZARD

Flammable fumes, such as solvent and paint fumes, in work area can ignite or explode. To help prevent fire and explosion:

• Use equipment only in well ventilated area.

• Eliminate all ignition sources; such as pilot lights, cigarettes, portable electric lamps, and plastic drop cloths (potential static arc).

• Sprayer generates sparks. When flammable liquid is used in or near the sprayer or for flushing or cleaning, keep sprayer at least 20 feet (6 m) away from explosive vapors.

• Keep work area free of debris, including solvent, rags and gasoline.

• Do not plug or unplug power cords or turn lights on or off when flammable fumes are present.

• Ground equipment and conductive objects in work area. Read Grounding instructions.

• If there is static sparking or you feel a shock, stop operation immediately. Do not use equipment until you identify and correct the problem.

• Keep a working fire extinguisher in the work area.

ELECTRIC SHOCK HAZARD

Improper grounding, setup, or usage of the system can cause electric shock.

• Turn off and disconnect power cord before servicing equipment.

• Use only grounded electrical outlets.

• Use only 3-wire extension cords.

• Ensure ground prongs are intact on sprayer and extension cords.

• Do not expose to rain. Store indoors.

SKIN INJECTION HAZARD

High-pressure fluid from gun, hose leaks, or ruptured components will pierce skin. This may look like just a cut, but it is a serious injury that can result in amputation. Get immediate surgical treatment.

• Do not point gun at anyone or at any part of the body.

• Do not put your hand over the spray tip.

• Do not stop or deflect leaks with your hand, body, glove, or rag.

• Engage trigger lock when not spraying.

• Follow Pressure Relief Procedure in this manual, when you stop spraying and before cleaning, checking, or servicing equipment.

2 311911C

Warning

WARNING

EQUIPMENT MISUSE HAZARD

Misuse can cause death or serious injury.

• Do not exceed the maximum working pressure or temperature rating of the lowest rated system component. Read Technical Data in all equipment manuals.

• Use fluids and solvents that are compatible with equipment wetted parts. Read Technical Data in all equipment manuals. Read fluid and solvent manufacturer’s warnings. For complete information about your material, request MSDS from distributor or retailer.

• Check equipment daily. Repair or replace worn or damaged parts immediately with genuine Graco replacement parts only.

• Do not alter or modify equipment.

• Use equipment only for its intended purpose. Call your Graco distributor for information.

• Route hoses and cables away from traffic areas, sharp edges, moving parts, and hot surfaces.

• Do not kink or overbend hoses or use hoses to pull equipment.

• Keep children and animals away from work area.

• Comply with all applicable safety regulations.

• Keep children and animals away from work area.

• Do not operate the unity when fatigued or under the influence of drugs or alcohol.

PRESSURIZED ALUMINUM PARTS HAZARD

Do not use 1,1,1-trichloroethane, methylene chloride, other halogenated hydrocarbon solvents or fluids containing such solvents in pressurized aluminum equipment. Such use can cause serious chemical reaction and equipment rupture, and result in death, serious injury, and property damage.

BURN HAZARD

Equipment surfaces can become very hot during operation. To avoid severe burns, do not touch hot equipment. Wait until equipment has cooled completely.

MOVING PARTS HAZARD

Moving parts can pinch or amputate fingers and other body parts.

• Keep clear of moving parts.

• Do not operate equipment with protective guards or covers removed.

• Pressurized equipment can start without warning. Before checking, moving, or servicing equipment, follow the Pressure Relief Procedure in this manual. Disconnect power or air supply.

TOXIC FLUID OR FUMES HAZARD

Toxic fluids or fumes can cause serious injury or death if splashed in the eyes or on skin, inhaled, or swallowed.

• Read MSDS’s to know the specific hazards of the fluids you are using.

• Store hazardous fluid in approved containers, and dispose of it according to applicable guidelines.

PERSONAL PROTECTIVE EQUIPMENT

You must wear appropriate protective equipment when operating, servicing, or when in the operating area of the equipment to help protect you from serious injury, including eye injury, inhalation of toxic fumes, burns, and hearing loss. This equipment includes but is not limited to:

• Protective eye wear

• Clothing and respirator as recommended by the fluid and solvent manufacturer

•Gloves

• Hearing protection

311911C 3

Component Identification

FinishPro 390

FinishPro 395

10 9

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4 311911C

Component Identification

Item Component

1 Prime/Drain Tube/Hose

2 Air Hose Connection

3 Prime/Spray Valve

4 Fluid Outlet

5 Air/Fluid Supply Hose

6 Displacement Pump

7 Gun (see manual)

8 Filter Manifold

9 Fluid Pressure Control

10 Power/Function Selector

11 Suction Tube

12 Gun Air Regulator

13 Direct Immersion Tube (FinishPro 390 model only)

Component Identification

14 Sprayer Air Pressure Regulator (FinishPro 395 model only)

15 Digital Display (FinishPro 395 model only)

16 Air Pressure Gauge (FinishPro 395 model only)

17 Gun Filter

18 High Pressure Paint Swivel

19 Hose T-clip

20 Flex Coil Air Hose

21 Fluid Pressure Gage (FinishPro 390 model only)

311911C 5

Installation

Grounding and Electric Requirements

The sprayer cord includes a grounding wire with an

appropriate grounding contact.

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The sprayer requires:

110-120 Vac Sprayers: 100-120 Vac, 50/60 Hz, 15A, 1 phase, circuit with a grounding receptacle.

230 Vac Sprayers: 230 Vac, 50/60 Hz, 10A, 1 phase, circuit with a grounding receptacle.

Recommended extension cords for use with this sprayer:

• 3-wire, 12 AWG (2.5 mm

) minimum, 300 ft. (90 m)

maximum length.

Smaller gauge or longer extension cords may reduce sprayer performance.

Spray gun: ground through connection to a properly

grounded fluid hose and pump.

Fluid supply container: follow local code.

Solvent and Oil-based fluids: follow local code. Use

only conductive metal pails placed on a grounded surface such as concrete. Do not place the pail on a nonconductive surface such as paper or cardboard, which interrupts grounding continuity.

Grounding the metal pail: connect a ground wire to the pail by clamping one end to pail and other end to ground such as a water pipe.

To maintain grounding continuity when flushing or relieving pressure: hold metal part of the spray gun

firmly to the side of a grounded metal pail, then trigger the gun.

Never use an outlet that is not grounded or an adapter.

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Do not use the sprayer if the electrical cord has a damaged ground contact. Only use an extension cord with an undamaged ground contact.

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6 311911C

Pressure Relief Procedure

Follow this Pressure Relief Procedure whenever you are instructed to relieve pressure, stop spraying, check or service equipment or install or clean spray tip.

1. Set function selection switch to OFF and unplug sprayer.

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2. Turn pressure to lowest setting.

3. Hold gun against side of grounded metal flushing pail. Trigger gun to relieve pressure.

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General Repair Information

Flammable materials spilled on hot, bare, motor could cause fire or explosion. To reduce risk of burns, fire or explosion, do not operate sprayer with cover removed.

• Keep all screws, nuts, washers, gaskets, and electrical fittings removed during repair procedures. These parts usually are not provided with replacement kits.

• Test repairs after problems are corrected. If sprayer does not operate properly, review repair procedure to verify you did it correctly. See Troubleshooting, page 8.

• Overspray may build up in the air passages. Remove any overspray and residue from air passages and openings in the enclosures whenever you service sprayer.

• Do not operate sprayer without motor shroud in place. Replace if damaged. Motor shroud directs cooling air around motor to prevent overheating and insulates control board from accidental electric shock.

4. Turn prime valve down.

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If you suspect the spray tip or hose is clogged or that pressure has not been fully relieved after following the steps above, VERY SLOWLY loosen tip guard retaining nut or hose end coupling to relieve pressure gradually, then loosen completely. Clear hose or tip obstruction.

5. Engage trigger safety lock on gun if unit is being shut down or left unattended.

To reduce risk of serious injury, including electric shock:

• Do not touch moving or electric parts with fingers or tools while testing repair.

• Unplug sprayer when power is not required for testing.

• Install all covers, gaskets, screws and washers before you operate sprayer.

CAUTION

• Do not run sprayer dry for more than 30 seconds. Doing so could damage pump packings.

• Protect the internal drive parts of this sprayer from water. Openings in the cover allow for air cooling of the mechanical parts and electronics inside. If water gets in these openings, the sprayer could malfunction or be permanently damaged.

• Prevent pump corrosion and damage from freezing. Never leave water or water-base paint in sprayer in cold weather. Freezing fluids can seriously damage sprayer. Store sprayer with Pump Armor to protect sprayer during storage.

• Do not allow material to dry on gun air cap. Poor spray finish could result.

311911C 7

Troubleshooting

Problem

What To Check

(If check is OK, go to next check)

(When check is not OK, refer to this column)

What To Do

Sprayer Won’t Operate

Basic Fluid Pressure 1. Pressure control knob setting. Motor

will not run if set at minimum (fully counter-clockwise).

2. Spray tip or fluid filter may be clogged.

Basic Mechanical 1. Pump frozen or hardened paint Thaw sprayer if water or water-based paint has fro-

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.

3. Motor. Remove drive housing assembly. See page 15, Drive Hous- ing Replacement. Try to rotate fan by hand.

Slowly increase pressure setting to see if motor starts.

Relieve pressure, page 7. Then clear clog or clean gun filter. Refer to gun instruction manual, 311937.

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.

Push pin into place and secure with spring retainer. See page 13, Displacement Pump Replacement.

Replace motor if fan won’t turn. See page 34, Motor Replacement.

Basic Air Pressure 1. Power/function selector. Ensure selection is AA.

2. Spray air pressure regulator may be closed (FinishPro 395)

3. Air valve at gun may be closed Turn air regulator counter-clockwise to open.

8 311911C

Pull air regulator to unlock and turn clockwise to open.

Troubleshooting

Problem

Basic Electrical

See wiring diagram, page 36

What To Check

(If check is OK, go to next check)

1. Electric supply. Meter must read 105-130 Vac for 110-120 Vac models and 210-255 Vac for 230 Vac models.

2. Extension cord. Check extension cord continuity with volt meter.

3. Sprayer power supply cord. Inspect for damage such as broken insulation or wires.

4. Fuse (FinishPro 390). Check replaceable fuse on control board (next to ON/OFF switch).

5. Motor leads are securely fastened and properly connected to control board.

6. Motor thermal switch. Yellow motor leads must have continuity through thermal switch.

What To Do

(When check is not OK, refer to this column)

Reset building circuit breaker, replace building fuses. Try another outlet.

Replace extension cord. Use shorter extension cord.

Replace power supply cord. See page 21, Power Cord Replacement.

Replace fuse after completing motor inspection. See page 23, Fuse Replacement.

Replace loose terminals; crimp to leads. Be sure terminals are firmly connected.

Clean circuit board terminals. Securely reconnect leads.

Replace motor. See page 34, Motor Replacement.

7. Brush cap missing or loose brush lead connections.

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.

9. Motor armature commutator for burn spots, gouges and extreme roughness.

10. Motor armature for shorts using armature tester (growler) or perform spin test, page 16.

11. Pressure control not plugged in to control board.

Install brush cap or replace brushes if leads are damaged. See page 18, Motor Brush Replacement.

Replace brushes. See page 18, Motor Brush Replacement.

Remove motor and have motor shop resurface commutator if possible. See page 34, Motor Replace- ment.

Replace motor. See page 34, Motor Replacement.

Insert pressure control connector into control board.

311911C 9

Troubleshooting

What To Check

Problem

Low Fluid Output 1. Worn spray tip. Relieve pressure, page 7. Replace tip. Refer to gun

(If check is OK, go to next check)

2. Verify pump does not continue to stroke when gun trigger is released.

3. Prime valve leaking. Relieve pressure, page 7. Then repair prime valve.

4. Suction hose connections. Tighten any loose connections. Check o-rings on

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.

6. Extension cord size and length. Replace with a correct, grounded extension cord.

7. Leads from motor to circuit board for damaged or loose wire connectors. Inspect wiring insulation and terminals for signs of overheating.

(When check is not OK, refer to this column)

instruction manual, 311937.

Service pump. See page 13, Displacement Pump Replacement.

See page 28, Pressure Control Replacement.

suction hose swivel.

Reset building circuit breaker; replace building fuse. Repair electrical outlet or try another outlet.

See page 6, Grounding and Electric Require-

ments.

Be sure male terminal pins are centered and firmly connected to female terminals. Replace any loose terminals or damaged wiring. Securely reconnect terminals.

What To Do

8. Worn motor brushes which must be 1/4 in. (6 mm) minimum.

9. Motor brushes binding in brush holders.

10. Low stall pressure. Turn pressure control knob fully clockwise.

11. Motor armature for shorts by using an armature tester (growler) or perform spin test, page 16.

Replace brushes. See page 18. Motor Brush Replacement.

Clean brush holders. Remove carbon dust by using compressed air to blow out brush dust.

Replace pressure control assembly. See page 28, Pressure Control Assembly Replacement.

Replace motor. See page 34, Motor Replacement.

10 311911C

Troubleshooting

What To Check

Problem

Motor runs and pump strokes 1. Prime Valve Open. Close prime valve.

Motor runs but pump does not stroke

(If check is OK, go to next check)

2. Paint supply. Refill and reprime pump.

3. Intake strainer clogged. Remove and clean, then reinstall.

4. Suction hose leaking air. Tighten nut. Check o-rings on swivel.

5. Intake valve ball and piston ball are seating properly.

6. Leaking around throat packing nut which may indicate worn or damaged packings.

7. Pump rod damaged. See Pump Manual 309250.

1. Displacement pump pin damaged or missing.

2. Connecting rod assembly for damage.

(When check is not OK, refer to this column)

See Pump Manual 309250. Strain paint before using to remove particles that could clog pump.

See Pump Manual 309250.

Replace pump pin if missing. Be sure retaining spring is fully in groove all around connecting rod. See page 13, Displacement Pump Replacement.

Replace connecting rod assembly. See page 13,

Displacement Pump Replacement.

What To Do

3. Gears or drive housing. Inspect drive housing assembly and gears for

damage and replace if necessary. See page 15, Drive Housing Replacement.

Motor is hot and runs intermittently

Low air output at gun 1. Air valve at gun may be closed. Turn air valve counter-clockwise to open.

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.

2. Motor has burned windings indicated by removing positive (red) brush and seeing burned adjacent commutator bars.

3. Tightness of pump packing nut. Overtightening tightens packings on rod, restricts pump action and damages packings.

2. Sprayer air regulator may be closed (FinishPro 395)

3. Air connections may be loose. Check all connections for leaking air.

Move sprayer to shaded, cooler area if possible.

Replace motor. See page 34, Motor Replacement.

Loosen packing nut. Check for leaking around throat. Replace pump packings if necessary. See pump manual 309250.

Pull to unlock and turn air regulator clockwise to open.

311911C 11

Troubleshooting

What To Check

Problem

Low air output at gun 4. Damaged (leaking) air supply hose. Replace air supply hose.

Air compressor does not run

(If check is OK, go to next check)

5. Air intake filter clogged. Clean or replace air intake filter kit.

6. Mechanical air unloader stuck open. Replace mechanical air unloader.

7. Electrical air unloader stuck open. Replace electrical air unloader.

1. Power/function selector switch

2. Voltage to compressor below 105

Vac for 110 - 120 Vac models or below 210 Vac for 240 Vac models

3. Loose power connections Verify all connections are firm.

4. Excessive head pressure (compressor hums)

5. Excessive head pressure (compressor hums)

(When check is not OK, refer to this column)

Set function selector switch to AA; replace switch.

Try another outlet. Reduce extension cord length or increase extension cord gauge.

Moisture frozen in air supply line.

Wait for air pressure to bleed to zero.

What To Do

Poor air spray pattern

Water in pattern

6. Excessive head pressure (compressor hums)

7. Excessive head pressure (compressor hums)

8. Compressor thermal switch is open. Ensure ambient temperature is below 115 °F (46 °C).

9. Low compressor performance. Worn compressor; repair compressor with

1. Air cap air ports clogged.

2. Air cap worn.

3. Worn spray tip.

1. Water in air line.

Electrical air unloader stuck closed. Replace electrical air unloader.

Open air regulator (FinishPro 395) Install air line Do Startup, Operation Manual 311905

Move sprayer to shaded, cooler area.

Compressor Service Kit 288723.

Soak in solvent to clean.

Replace air cap.

Relieve pressure, page 7. Replace tip. Refer to gun instruction manual, 311937.

Add Water Separator Kit 289535 to air line.

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