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
l
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.
21
5
8-2
13
1
A
5
8-2
13
1

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.
4. 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
12
8-2
9
10
8-1
18
19
20
7
4
3-1
5
15
16
17
14 13
12-1
ti10444a
12-2 11
6
24
26
Gravity Feed Model Shown
3-2
Detail of Side Cup Gravity Feed Guns
26
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
1
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)
1
24* FILTER, fluid (stan-
dard gravity feed mod-
els only)
1
26 CUP, gravity (gravity
feed models only)
1
27 TOOL, gun (not
shown)
1

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