Graco DURON Performance 390 Operating instructions

Graco Inc., PO Box 1441, Minneapolis, MN 55440-1441

310824C

Repair

390™Airless Sprayer

- For portable spray applications of architectural paints and coatings -

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

*all models not available in all countries

IMPORTANT SAFETY INSTRUCTIONS!

Read all warnings and instructions. Save these instructions. Contact Graco Customer Service

or your local Graco distributor to obtain a manual in your language.

Model #* VAC Country

248800 / 248802 / 826055 120 North America ✔

248804 / 248806

240 Europe / Europe

multicord

✔

248808 240 Asia / Australia ✔

248810 110 UK ✔

TIA

ti5634a

Related Manuals

310820

309639

309250

310876

Manual Conventions

2310824C

Contents

Manual Conventions . . . . . . . . . . . . . . . . . . . . . . . . 2

Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Component Identification . . . . . . . . . . . . . . . . . . . . 5

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Pressure Relief Procedure . . . . . . . . . . . . . . . . . . . 7

General Repair Information . . . . . . . . . . . . . . . . . . 8

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Displacement Pump Replacement . . . . . . . . . . . . 13

Drive Housing Replacement . . . . . . . . . . . . . . . . . 15

Spin Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Fan Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Motor Brush Replacement . . . . . . . . . . . . . . . . . . 18

Control Board Replacement . . . . . . . . . . . . . . . . . 19

Fuse Replacement . . . . . . . . . . . . . . . . . . . . . . . . . 21

Pressure Control Assembly Replacement . . . . . . 22

Manifold Replacement . . . . . . . . . . . . . . . . . . . . . . 23

Power Cord Replacement . . . . . . . . . . . . . . . . . . . 24

Motor Replacement . . . . . . . . . . . . . . . . . . . . . . . . 25

Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Graco Standard Warranty . . . . . . . . . . . . . . . . . . . 29

Graco Information . . . . . . . . . . . . . . . . . . . . . . . . . 30

Manual Conventions

Note

WARNING

WARNING: a potentially hazardous situation which, if

not avoided, could result in death or serious injury.

Warnings in the instructions usually include a symbol

indicating the hazard. Read the general Warnings

section for additional safety information.

Hazard Symbol

CAUTION

CAUTION: a potentially hazardous situation which, if

not avoided, may result in property damage or

destruction of equipment.

Additional helpful information.

Warnings

310824C 3

Warnings

The following are general warnings related to the safe setup, use, grounding, maintenance, and repair of this equip-

ment. Additional, more specific warnings may be found throughout the text 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.

• When flammable liquid is used in or near sprayer or for flushing or cleaning, keep sprayer at least 20

feet (6 m) away from explosive vapors.

• Eliminate all ignition sources; such as pilot lights, cigarettes, portable electric lamps, and plastic drop

cloths (potential static arc).

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

• Do not plug or unplug power cords, or turn power or light switches on or off when flammable fumes

are present.

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

• Use only grounded hoses.

• Hold gun firmly to side of grounded pail when triggering into pail.

• 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 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.

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 medical attention.

• 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.

• Do not spray without tip guard and trigger guard installed.

• Engage trigger lock when not spraying.

• Follow Pressure Relief Procedure in this manual, when you stop spraying and before cleaning,

checking, or servicing equipment.

Warnings

4310824C

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. See Technical Data in all equipment manuals.

• Use fluids and solvents that are compatible with equipment wetted parts. See Technical Data in all

equipment manuals. Read fluid and solvent manufacturer’s warnings.

• Check equipment daily. Repair or replace worn or damaged parts immediately.

• 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.

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.

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 eyewear

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

•Gloves

• Hearing protection

WARNING

Component Identification

310824C 5

Component Identification

KEH

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PR S

Item English

A Pressure Control

BON/OFFswitch

C Pressure Gauge (not on all models)

DPowerCord

E Fluid Outlet

FPrimeValve

G Cord Wrap

HPump

J Suction Hose

KDrainHose

MFluidHose

NGun

PTip

R Guard

S Trigger Safety Lock

Installation

6310824C

Installation

Grounding and Electric

Requirements

The sprayer cord includes: a grounding wire with an

appropriate grounding contact.

The sprayer requires:

110-120V Units: 100-130VAC, 50/60 Hz, 11A, 1 phase,

circuit with a grounding receptacle.

240V Units: 210-255 VAC, 50/60 Hz, 7.5A, 1 phase, cir-

cuit with a grounding receptacle.

Never use an outlet that is not grounded or an

adapter.

Do not use the sprayer if the electrical cord has a dam-

aged ground contact. Only use an extension cord with

an undamaged ground contact.

Recommended extension cords for use with this

sprayer:

• 110-120V: 3-wire, 12 AWG (2.5 mm2) minimum, 300

ft. (90 m) maximum length.

• 240V: 3-wire, 16 AWG (1.0 mm2) minimum, 300 ft

(90 m) maximum length.

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 sur-

face such as concrete. Do not place the pail on a non-

conductive 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.

WARNING

Your system must be grounded. Read warnings, page

Smaller gauge or longer extension cords may

reduce sprayer performance.

Pressure Relief Procedure

310824C 7

Pressure Relief Procedure

1. Turn OFF power and turn pressure control to lowest

pressure setting.

2. Hold gun against side of grounded metal flushing

pail. Trigger gun to relieve pressure.

3. Turn prime valve down.

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.

4. Engage trigger safety lock on gun if unit is being

shut down or left unattended.

WARNING

Follow this Pressure Relief Procedure whenever you

are instructed to relieve pressure, stop spraying, check

or service equipment or install or clean spray tip. Read

Injection Hazard Warning, page 3.

FLUSH

ti5310a

ti5304a

General Repair Information

8310824C

General Repair Information

• Keep all screws, nuts, washers, gaskets, and electri-

cal 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 Trouble-

shooting, page 9.

• Overspray may build up in the air passages.

Remove any overspray and residue from air pas-

sages and openings in the enclosures whenever

you service sprayer.

• Do not operate the sprayer without the motor shroud

in place. Replace if damaged. Motor shroud directs

cooling air around motor to prevent overheating and

insulate the control board from accidental electric

shock.

WARNING

Read Electric Shock Warning, page 3 and Burn

Hazard Warning, page 4.

WARNING

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.

WARNING

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

when its not in use in cold weather. Freezing fluids

can seriously damage sprayer. Store sprayer with

Pump Armor to protect sprayer during storage.

Troubleshooting

310824C 9

Troubleshooting

WARNING

Read Electric Shock Warning, page 3, Burn Hazard

Warning, page 4 and Pressure Relief Procedure,

page 7.

Problem

What To Check

(If check is OK, go to next check)

What To Do

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

Motor Won’t Operate

Basic Fluid Pressure 1. Pressure control knob setting.

Motor will not run if set at mini-

mum (fully counter-clockwise).

Slowly increase pressure setting to see if motor

starts.

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,

309639.

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

frozen in sprayer. Place sprayer in warm area to

thaw. Do not start sprayer until thawed com-

pletely. If paint hardened (dried) in sprayer,

replace pump packings. See page 13, Dis-

placement Pump Replacement.

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. Motor. Remove drive housing

assembly. See page 15, Drive

Housing Replacement. Try to

rotate fan by hand.

Replace motor if fan won’t turn. See page 26,

Motor Replacement.

Troubleshooting

10 310824C

Basic Electrical

See wiring diagram, page

1. Electric supply. Meter must read

100-130 VAC for 110-120 VAC

models and 210-255 VAC for 240

VAC models.

Reset building circuit breaker, replace building

fuses. Try another outlet.

2. Extension cord. Check extension

cord continuity with volt meter.

Replace extension cord.

3. Sprayer power supply cord.

Inspect for damage such as bro-

ken insulation or wires.

Replace power supply cord. See page 25,

Power Cord Replacement.

4. Fuse. Check replaceable fuse on

control board (next to ON/OFF

switch).

Replace fuse after completing motor inspection.

See page 21, Fuse Replacement.

5. Motor leads are securely fas-

tened and properly connected to

control board.

Replace loose terminals; crimp to leads. Be

sure terminals are firmly connected.

Clean circuit board terminals. Securely recon-

nect leads.

6. Motor thermal switch. Yellow

motor leads must have continuity

through thermal switch.

Replace motor. See page 26, Motor Replace-

ment.

7. Brush cap missing or loose brush

lead connections.

Install brush cap or replace brushes if leads are

damaged. See page 18, Motor Brush

Replacement.

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. Motor armature commutator for

burn spots, gouges and extreme

roughness.

Remove motor and have motor shop resurface

commutator if possible. See page 26, Motor

Replacement.

10. Motor armature for shorts using

armature tester (growler) or per-

form spin test, page 16.

Replace motor. See page 26, Motor Replace-

ment.

11. Pressure control not plugged in

to control board.

Insert pressure control connector into control

board.

Problem

What To Check

(If check is OK, go to next check)

What To Do

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

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