Graco Finex 289256 Operation manual

For the spray application of paints and coatings.

Pour la pulvérisation de peintures et de revêtements.

Para la aplicación mediante pulverización de pintu ras y revestimientos.

Includes Mini-HVLP, HVLP, and Conventional Styles with Pressure and Gravity Feeds.

See page 2 for list of models.

Comprend les styles Mini-HVLP, HVLP et Conventional à alimentation par pression ou par gravité.

Voir page 13 pour la liste des modèles.

Incluye Mini-HVLP, HVLP, y Estilos convencionales con alimentación a presión y por gravedad.

Consulte la página 24 para ver una lista de modelos.

100 psi (0.7 MPa, 7 bar) Maximum Working Fluid and Air Pressure

Pressions maximales de service et pneumatique : 100 psi (0,7 MPa, 7 bars)

Presión máxima de funcionamiento de aire y de fluido de 100 psi (0,7 MPa, 7 bar)

Important Safety Instructions

Read all warnings and instructions in this

manual. Save these instructions

Instructions de sécurité importantes

Lire toutes les mises en garde et instructions

de ce manuel. Sauvegarder ces instructions.

Instrucciones importantes de seguridad

Lea todas las advertencias e instrucciones

de este manual. Guarde las instrucciones.

English page 2

Français page 13

Español página 25

Instructions - Parts List

Manuel d’instructions – Liste des pièces

Instrucciones – Lista de piezas

Finex

™

Gun

Pistolet Finex

™

Pistola Finex

™

II 2 G

312388P

EN FR ES

Standard Gravity Feed

Conventional - Alimentation par gravité

standard

Alimentación por gravedad estándar

convenciona

Pressure Feed

Alimentation sous pression

Alimentación a presión

Side Cup Gravity Feed

Réservoir latéral - Alimentation par gravité

Alimentación por gravedad con copela lateral

Models

2312388P

Models

Warnings

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 risk. Refer back to these warnings. Additional, product-specific

warnings may be found throughout the body of this manual where applicable.

Gun Style Part No. Needle/Nozzle Size

in (mm)

Gravity Feed

Mini-HVLP

289256 0.024 (0.6)

289257 0.031 (0.8)

289258 0.039 (1.0)

289259 0.047 (1.2)

289260 0.055 (1.4)

Standard

Gravity Feed

Conventional

289243 0.051 (1.3)

289244 0.055 (1.4)

289245 0.059 (1.5)

289246 0.071 (1.8)

Standard

Gravity Feed

HVLP

289238 0.051 (1.3)

289239 0.055 (1.4)

289240 0.059 (1.5)

289241 0.071 (1.8)

Side Cup

Gravity Feed

Conventional

24J601 0.040 (1.0)

24J602 0.047 (1.2)

24J603 0.055 (1.4)

Side Cup

Gravity Feed

HVLP

24J599 0.047 (1.2)

24J600 0.055 (1.4)

Pressure

Feed HVLP

289247 0.039 (1.0)

289248 0.047 (1.2)

289249 0.055 (1.4)

289250 0.071 (1.8)

Pressure

Feed

Conventional

289252 0.039 (1.0)

289253 0.047 (1.2)

289254 0.055 (1.4)

289255 0.071 (1.8)

Gun Style Part No. Needle/Nozzle Size

in (mm)

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).

• 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 all equipment in the work area. See 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.

Warnings

312388P 3

EQUIPMENT MISUSE HAZARD

Misuse can cause death or serious injury.

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

• 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. For complete information about your material, request MSDS forms from

distributor or retailer.

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

genuine manufacturer’s replacement parts only.

• Do not alter or modify equipment.

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

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

surfaces.

• Do not kink or over bend hoses or use hoses to pull equipment.

• Keep children and animals away from work area.

• Comply with all applicable safety regulations.

PRESSURIZED EQUIPMENT HAZARD

Fluid from the gun/dispense valve, leaks, or ruptured components can splash in the

eyes or on skin and cause serious injury.

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

before cleaning, checking, or servicing equipment.

• Tighten all fluid connections before operating the equipment.

• Check hoses, tubes, and couplings daily. Replace worn or damaged parts

immediately.

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.

• Always wear impervious gloves when spraying or cleaning equipment.

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

Setup

4312388P

Setup

Connecting Air Line

1. Install an air pressure regulator on gun air

supply line to control air pressure.

2. Install a shutoff valve downstream of the air

regulator to shut off gun air.

3. Connect a clean, dry, filtered air supply to

air inlet fitting (13). Connect other end to

shutoff valve.

Connecting Fluid Supply

Pressure Feed Guns:

1. To control fluid

pressure to the gun,

install a fluid regulator

on the fluid line.

2. Connect the fluid hose

to the gun fluid inlet,

3/8-18 npsm (R3/8-19)

(21).

3. Connect other end to a

regulated fluid supply line.

Standard Gravity Feed Guns:

1. Install fluid filter

(24) into fluid

inlet (A).

2. Screw on gravity

cup.

3. Remove gravity

cup cover and fill

cup with solvent

to flush if this is

first time using

equipment. (See

Flushing, page

6.)

4. After flushing, fill

cup with fluid and

attach cover.

Side Cup Gravity Feed Guns (no filter):

1. Screw on gravity

cup.

2. Adjust angle.

3. Remove gravity

cup cover and fill

cup with solvent

to flush if this is

first time using

equipment. (See

Flushing, page

6.)

4. After flushing, fill

cup with fluid and attach cover.

Reference numbers and letters in paren-

theses in the text refer to numbers and

letters in the illustrations.

8-2

Operation

312388P 5

Operation

Pressure Relief Procedure

1. Turn off air and fluid supply.

2. Hold a metal part of the gun firmly to

a grounded metal pail. Trigger the gun

to relieve pressure.

Adjust Spray Pattern

1. Rotate air cap to change spray pattern

direction.

2. For maximum fluid flow and to prevent

premature fluid nozzle wear, turn fluid

adjustment knob (8-2) counterclockwise

until no trigger restriction is felt. Then turn

knob out 1/2 turn more.

3. If further fluid flow restriction is needed,

use different size needle/nozzle/air cap

combination.

If necessary, fluid adjustment knob (8-2)

can be turned clockwise to reduce volume

of fluid output. However, continuously

spraying with fluid adjustment knob closed

causes accelerated abrasive wear on fluid

needle and trigger/air valve shaft interface.

Pressure Feed only:

Adjust fluid pressure

to achieve desired fluid flow rate.

5. Test spray pattern and atomization

while holding gun about 6 to 8 inches

(150 to 200 mm) from test piece.

a. If pattern is too wide, turn pattern

adjustment knob (5) clockwise to

narrow pattern.

b. To create a round pattern, turn pattern

adjustment knob (5) fully clockwise.

c. If pattern is too narrow, turn knob (5)

counterclockwise.

d. Check atomization. Increase gun

air supply pressure in 5 psi (34 kPa,

0.3 bar) increments until you have

the desired atomization.

Applying the Fluid

For the best results:

• Keep gun perpendicular to surface and

consistent distance of about 6 to 8 inches

(150 to 200 mm). Do not angle the gun as

you spray.

• Use smooth, even strokes, with about 50%

overlap.

• HVLP Guns: Use a slightly slower hand

movement and make fewer passes than

you would with a conventional air spray

gun. Take care to avoid runs or sags.

Do not exceed maximum working air pres-

sure shown on front cover. Read warnings.

If fluid adjustment knob (8-2) is turned in

all the way, the gun emits only air.

Maintenance

6312388P

Maintenance

Flushing

Flush before changing colors, before fluid can

dry in the equipment, at the end of the day,

before storing, and before repairing equip-

ment. Use a solvent that is compatible with

gun wetted parts and fluid that will be sprayed.

Gravity Feed Guns:

1. Follow Pressure Relief Procedure,

page 5.

2. Dispose of any paint in the cup.

3. Fill the cup with a small amount of solvent.

4. Spray into a grounded metal waste

container until clean solvent dispenses.

5. Follow Pressure Relief Procedure,

page 5.

Pressure Feed Guns:

1. Follow Pressure Relief Procedure,

page 5.

2. Disconnect fluid supply hose and air supply

hose from gun.

3. Connect solvent supply hose to gun.

4. Hold metal part of gun against a grounded

metal container, trigger, and flush the gun

with solvent until all traces of paint are

removed from the gun passages.

5. Turn off the solvent supply.

6. Follow Pressure Relief Procedure,

page 5.

7. Disconnect solvent supply hose from gun.

Daily Cleaning

1. Follow Pressure Relief Procedure,

page 5.

2. Clean fluid and air line filters.

3. Check for fluid leakage from gun and

fluid hoses. Tighten fittings or replace

equipment as needed.

4. Flush gun before changing colors and

when you are done spraying.

5. Remove cup and filter and clean them

(gravity feed models only).

6. Remove air cap (1) and nozzle (2) as

instructed on page 8 and soak them in

compatible solvent.

7. Use a rag moistened in solvent to wipe

down outside of gun.

8. Before reinstalling air cap and nozzle,

clean them and front of gun with a soft-bris-

tle brush dipped into compatible solvent.

Do not use a wire brush or metal tools.

To clean out air cap holes, use a soft

implement, such as a toothpick.

9. Lubricate gun.

CAUTION

• Do not submerge gun in solvent. Solvent

dissolves lubricant, dries out packings, and

may clog air passages. You can immerse

front end of gun in solvent just until cup

connection is covered.

• Do not use metal tools to clean air cap

holes as this may scratch them and distort

the spray pattern.

• Use a compatible solvent.

CAUTION

Trigger gun and use gun tool (27) whenever

you tighten or remove nozzle (2) to avoid

damaging needle seat and nozzle.

Troubleshooting

312388P 7

Troubleshooting

Problem Cause Solution

One side of air cap (1) dirty or

clogged. Clean air cap orifices. See page 6. Blow

air through orifices until clean. If air cap

holes are damaged, replace air cap.

a. Loose air cap (1). a. Tighten.

b. Dried or damaged air

cap (1) or fluid nozzle (2). b. Rotate air cap 180°.

If pattern follows air cap,

problem is

in air cap. Clean and inspect. See

page 6. If pattern is not corrected,

replace air cap.

If pattern does not follow the air cap,

the problem is with the fluid nozzle.

Clean and inspect the nozzle. See

page 6. If the pattern is not corrected,

replace nozzle.

a. Atomization air pressure

set too high. a. Reduce air pressure.

b. Spraying a thin material in

too wide of a pattern. b. Increase material control by turning

fluid adjustment knob (8-2) counter-

clockwise while reducing spray width

by turning pattern adjustment

knob (5) clockwise.

Or increase material viscosity.

Air getting into paint stream.

a. Cup almost empty. a. Fill cup.

b. Dry needle packing (3-1,

3-2). b. Loosen packing seat and put a few

drops of machine oil on packing (3-1,

3-2). Retighten seat (4).

c. Fluid nozzle (2) too loose. c. Tighten.

d. Dried material between

nozzle (2) and gun body. d. Clean nozzle and front of gun. See

page 6.

e. Damaged needle seal. e. Replace seal. See page 8.

Other spray pattern

problems. a. Gun not properly adjusted. a. See page 5.

b. Sluggish needle (10). b. Clean and lubricate.

Unable to get round

pattern. Pattern adjustment knob (5)

not seating properly.

Clean or replace knob.

Will not spray. a. No air pressure at gun. a. Check air supply and air lines.

b. Cup empty. b. Fill cup.

c. Fluid adjustment knob (8-2)

turned too far clockwise. c. Adjust knob (8-2) counterclockwise.

d. Fluid too thick for gravity

feed. d. Thin material.

Spitting

Service

8312388P

Service

Preparation

1. Flush and clean gun before servicing.

2. Follow Pressure Relief Procedure,

page 5.

Air Cap, Nozzle, and Needle

1. Unscrew air cap (1).

2. Trigger gun while you remove the

nozzle (2) with gun tool (27).

3. Remove fluid adjustment knob (8-2) and

spring (9).

4. Pull fluid needle (10) out the back of the

gun.

Air Valve and Needle Packings

1. Remove retaining rings (15), pin (16), and

trigger (17).

2. Remove packing nut (4) and fluid needle

packings (3-1, 3-2).

3. Remove fluid needle guide (7).

4. Remove fluid adjusting guide (8-1).

5. Remove spring (18) and air valve (19).

6. Remove air valve seat (20) and o-rings.

7. Replace parts as needed.

8. Assemble gun in reverse order. Lubricate

needle and o-rings. Be sure to trigger gun

when installing nozzle (2).

Fluid leaking from

packing nut (4). a. Packing nut (4) loose. a. Tighten, but not so tight as to grip

needle.

b. Packing (3-1, 3-2) worn or

dry. b. Lubricate or replace.

Fluid nozzle (2)

dripping. a. Dry packing (3-1, 3-2). a. Lubricate.

b. Sluggish needle (10). b. Clean and lubricate.

c. Packing nut (4) too tight. c. Loosen.

d. Worn fluid nozzle or

needle. d. Replace.

Thin, coarse finish. a. Gun held too far from

surface. a. Hold gun about 6 to 8 inches

(150 to 200 mm) from surface.

b. Atomization air pressure

set too high. b. Reduce air pressure.

Thick, dimpled finish

(resembling orange

peel).

Gun held too close to surface. Hold gun about 6 to 8 inches

(150 to 200 mm) from surface.

Problem Cause Solution

Trigger gun and use gun tool (27) when-

ever you tighten or remove the nozzle (2)

to avoid damage.

Parts

312388P 9

Parts

8-2

8-1

3-1

14 13

12-1

ti10444a

12-2 11

Gravity Feed Model Shown

3-2

Detail of Side Cup Gravity Feed Guns

ti17302a

Ref. Description Qty

1 CAP, air 1

2 NOZZLE, fluid 1

3-1* PACKING, fluid needle 1

3-2* PACKING, fluid needle 1

4* NUT, packing 1

5* KNOB, pattern

adjustment

6* O-RING 1

7* GUIDE, fluid needle 1

8-1* GUIDE, fluid adjusting 1

8-2* KNOB, fluid adjusting 1

9* SPRING, fluid needle 1

10 NEEDLE, fluid 1

11* O-RING 1

12-1 BODY, gun 1

12-2* KIT, distributor, air 1

13* FITTING, air inlet 1

14* VALVE, air adjustment 1

15* RING, retaining 2

16* PIN, trigger 1

17* KIT, trigger 1

18* SPRING, air valve 1

19* VALVE, air 1

20* SEAT, air valve 1

21 CONNECTOR, fluid,

(pressure feed models

only, not shown)

24* FILTER, fluid (stan-

dard gravity feed mod-

els only)

26 CUP, gravity (gravity

feed models only)

27 TOOL, gun (not

shown)

Repair Kits

10 312388P

Repair Kits

† Includes stainless steel trigger (17).

Gun Style

Needle/

Nozzle Size

in. (mm)

Needle,

Nozzle, Air

Cap Kit

(includesparts

1, 2, and 10)

Needle

Packing Kit

(includesparts

3-1, 3-2 and 4)

Gun Rebuild

Kit

(includes parts

marked *)

Air

Distributor

Kit (includes

part 12-2,

pack of 5)

Trigger

Repair Kit

(includesparts

15, 16 and 17)

Gravity Feed

Mini-HVLP

0.024 (0.6) 289286

288890 288895 24C308 24F059†

0.031 (0.8) 289287

0.039 (1.0) 289288

0.047 (1.2) 289289

0.055 (1.4) 289290

Standard

Gravity Feed

Conventional

0.039 (1.0) 289291

288891 288896 24C309 24F061†

0.051 (1.3) 289292

0.055 (1.4) 289293

0.059 (1.5) 289294

0.071 (1.8) 289295

Standard

Gravity Feed

HVLP

0.039 (1.0) 289296

288891 288896 24C309 24F061†

0.051 (1.3) 289297

0.055 (1.4) 289298

0.059 (1.5) 289299

0.071 (1.8) 289300

Side Cup

Gravity Feed

Conventional

0.040 (1.0) 24J881

288891 288897† 24C309 24F061†

0.047 (1.2) 24J882

0.055 (1.4) 24J883

Side Cup

Gravity Feed

HVLP

0.047 (1.2) 24J879

288891 288897† 24C309 24F061†

0.055 (1.4) 24J880

Pressure Feed

HVLP

0.039 (1.0) 289301

288891 288897† 24C309 24F061†

0.047 (1.2) 289302

0.055 (1.4) 289303

0.071 (1.8) 289304

PressureFeed

Conventional

0.031 (0.8) 289305

288891 288897† 24C309 24F061†

0.039 (1.0) 289306

0.047 (1.2) 289307

0.055 (1.4) 289308

0.071 (1.8) 289309

0.086 (2.2) 289677

0.098 (2.5) 289678

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