INSTRUCTIONS–PARTS LIST
Parts
309240L
This manual contains important
warnings and information.
READ AND KEEP FOR REFERENCE.
INSTRUCTIONS
First choice when
quality counts.t
Two- , Three- , and Four-Stage
HVLP Turbine Sprayers
120V AC 50/60 Hz
HVLP 2500t with Two-Stage Turbine
Model 233421
5 psi (34 kPa, 0.3 bar) Maximum Working Pressure
HVLP 3800t with Three-Stage Turbine
Model 233422
6 psi (41 kPa, 0.4 bar) Maximum Working Pressure
HVLP 4900t with Four-Stage Turbine
Model 233425
8 psi (55 kPa, 0.5 bar) Maximum Working Pressure
Model descriptions are in Turbine
Components Table on page 4.
Related Manuals
HVLP Compressor/Cart 309241. . . . . . . . . . . . . . . . . . .
HVLP Turbine Spray Gun 309205. . . . . . . . . . . . . . . . . .
7947A
4900 Shown
GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440–1441
ECOPYRIGHT 2000, GRACO INC.
Graco Inc. is registered to I.S. EN ISO 9001
Table of Contents
Symbols
Warnings 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General Information 4. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Component Identification and Function 5. . . . . . . . . . . .
Setup 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shutdown 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Repair 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts Drawing 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts List 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accessories 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Graco Standard Warranty 22. . . . . . . . . . . . . . . . . . . . . .
Graco Phone Number 22. . . . . . . . . . . . . . . . . . . . . . . . . .
WARNING
FIRE AND EXPLOSION HAZARD
Improper grounding, poor ventilation, open flames, or sparks can cause a hazardous condition and
result in a fire or explosion and serious injury.
Warning Symbol
WARNING
This symbol alerts you to the possibility of serious
injury or death if you do not follow the instructions.
Caution Symbol
CAUTION
This symbol alerts you to the possibility of damage to
or destruction of equipment if you do not follow the
instructions.
D Ground the equipment. See Grounding on page 6.
D If there is any static sparking or you feel an electric shock while using this equipment, stop
spraying immediately. Do not use the equipment until you identify and correct the problem.
D Provide fresh air ventilation to avoid the buildup of flammable fumes from solvents or the fluid
being sprayed.
D When flammable liquid is sprayed or used for flushing or cleaning the equipment, the turbine must
be placed at least 20 feet (6.1 m) away from areas where hazardous concentrations of flammable
vapors are likely to occur.
D Use additional air hose if necessary to ensure that the turbine is operated in a clean, dry,
well-ventilated area.
D Never place the turbine inside a spray booth! Use this equipment outdoors or in extremely
well-ventilated areas.
D Keep the spray area free of debris, including solvent, rags, and gasoline.
D Electrically disconnect all equipment in the spray area.
D Extinguish all open flames or pilot lights in the spray area.
D Do not smoke in the spray area.
D Do not turn on or off any light switch in the spray area while operating or if fumes are present.
D Do not operate a gasoline engine in the spray area.
2 309240
INSTRUCTIONS
WARNING
EQUIPMENT MISUSE HAZARD
Equipment misuse can cause the equipment to rupture or malfunction and result in serious injury.
D This equipment is for professional use only.
D Read all instruction manuals, tags, and labels before you operate the equipment.
D Use the equipment only for its intended purpose. If you are not sure, call your Graco distributor.
D Do not alter or modify this equipment. Use only genuine Graco parts.
D Check equipment daily. Repair or replace worn or damaged parts immediately.
D Do not exceed the maximum working pressure of the lowest-rated system component.
HVLP 2500 turbine has a working pressure of 5 psi (0.3 bar, 34 kPa).
HVLP 3800 turbine has a working pressure of 6 psi (0.4 bar, 41 kPa).
HVLP 4900 turbine has a working pressure of 8 psi (0.5 bar, 55 kPa).
D Use fluids and solvents that are compatible with the equipment wetted parts. See Specifications
on page 21 for wetted parts information.
D Do not use hoses to pull equipment.
D Route hoses away from traffic areas, sharp edges, moving parts, and hot surfaces. Do not expose
Graco hoses to temperatures above 82_C (180_F) or below –40_C (–40_F).
D Wear hearing protection when operating this equipment.
D Do not lift pressurized equipment.
D Comply with all applicable local, state, and national fire, electrical, and safety regulations.
D Do not point the gun at anyone or at any part of the body.
D Do not put your hand or fingers over the gun fluid nozzle.
D Do not stop or deflect leaks with your hand, body, glove, or rag.
D Do not “blow back” fluid; this is not an air spray system.
D Follow the Pressure Relief Procedure on page 10 if the fluid nozzle clogs and before you clean,
check, or service the equipment.
D Tighten all fluid connections before you operate the equipment.
D Check the hoses, tubes, and couplings daily. Replace worn or damaged parts immediately.
TOXIC FLUID HAZARD
Hazardous fluid or toxic fumes can cause serious injury or death if splashed in the eyes or on the skin,
inhaled, or swallowed.
D Know the specific hazards of the fluid you are using.
D Store hazardous fluid in an approved container. Dispose of hazardous fluid according to all local,
state, and national guidelines.
D Always wear protective eyewear, gloves, clothing and respirator as recommended by the fluid and
solvent manufacturer.
D Do not use 1,1,1-trichloroethane, methylene chloride, other halogenated hydrocarbon solvents, or
fluids containing such solvents in the turbine spray system, which contains aluminum and/or
galvanized-coated parts. Such use could result in a serious chemical reaction, with the possibility
of explosion, which could cause death, serious injury, and/or substantial property damage.
309240 3
General Information
HVLP Turbine Sprayers
The HVLP 2500, HVLP 3800, and HVLP 4900
Turbines, compressor/cart, and spray guns can spray
most coatings or finishes currently being used for
automotive refinish, industrial, aerospace, marine,
wood, plastic, and architectural applications.
To produce high-quality paint finishes, the spray gun
typically utilizes inbound air pressure of 5 psi (0.3 bar,
34 kPa) for HVLP 2500; 6 psi (0.4 bar, 41 kPa) for
HVLP 3800; and 8 psi (0.5 bar, 55 kPa) for HVLP
4900. A cone of air, produced by the gun, carries and
directs the paint from the gun to the surface,
minimizing overspray and increasing transfer
efficiency. This enables painters to comply with new
clean air laws that are designed to reduce VOC
(volatile organic compounds) emissions, eases paint
application by requiring fewer paint passes to obtain
coverage, and saves on both material and clean-up
time.
See HVLP Turbine Spray Gun manual 309205 for
more information on the operation and use of the
turbine spray gun.
Unpacking Turbine
Unpack the Graco Turbine Sprayer from the shipping
carton, and inspect for any possible shipping damage.
If there is any damage, call your distributor.
Turbine Configurations
Graco turbines come in the following basic
configurations:
D HVLP 2500 two-stage turbine sprayer
D HVLP 3800 three-stage turbine sprayer
D HVLP 4900 four-stage turbine sprayer
Turbine Components Table
System Model 30-ft (9 m) Hose
HVLP 2500 233421 241413 244117 non-
bleeder style cup gun
244124 (#3)
HVLP 3800 233422 241413 244117 non-
bleeder style cup gun
244124 (#3)
HVLP 4900 233425 241413 244117 non-
bleeder style cup gun
244124 (#3)
Gun /
Fluid Set
with
with
with
Extra/Fluid Sets
none
244125 (#4)
244126 (#5)
244123 (#2)
244125 (#4)
244126 (#5)
244127 (#6)
4 309240
Component Identification and Function
C
B
A
H
G
D
J
K
L
E
F
Fig. 1
A Air outlet Connection for turbine air supply to HVLP Turbine Spray Guns (HVLP
4900 units include quick connector)
B Power switch ON/OFF switch for sprayer turbine and rear outlet
C Storage compartment Provides storage for fluid set components
D Turbine handle Folds flat for minimum storage space
E Turbine case Houses air filter and provides dual air flow to motor and turbine; can be
lock-mounted on compressor/cart
F Air filters (pre-filter and main) Provide filtered air for turbine spray gun and turbine motor
G Two-speed switch Allows two-speed operation of turbine sprayer motor (used on HVLP
4900 units)
H Air filter indicator light Indicates air filter performance and maintenance (used on HVLP 3800
and HVLP 4900 units)
J Connector and power cord Provides power for turbine sprayer (power cord provided with turbine)
K Auxiliary power outlet Switched power outlet for compressor/cart or other accessory
L Resettable circuit breaker Provides protection for turbine motor and cart
7947A
309240 5
Setup
Grounding
WARNING
Improper installation or alteration of the grounding
plug will result in a risk of electric shock, fire, or
explosion that could cause serious injury or death.
This equipment requires a 120V AC, 60 Hz, 15A circuit
with a grounding receptacle. See Fig. 2.
grounded outlets
grounding prong
Fig. 2
Extension cord must be 3-wire, 12 AWG, 50 ft (15 m)
or shorter.
Do not alter the ground prong or use an adapter.
Setup/Use Options
HVLP Turbine Sprayers have a variety of user options.
See Fig. 3.
D See compressor/cart manual 309241 for
information on compressor/cart setup and
operation.
Prepare the Fluid
D Always strain the fluid before you spray; this
includes color, reducer, and hardeners if used.
D When using a turbine spray system, use a
slower drying reducer or thinner to compensate for
the faster drying time caused by the warm air of the
turbine. Do not over reduce.
CAUTION
The performance of the turbine sprayer varies with
the viscosity of the material and the length of the
hose. Keep the hose short to prevent pressure drop.
Paint Reduction — Automotive Type Finishes
Reduce and catalyze all paint to manufacturer’s
specifications. To compensate for the faster drying
time of turbine systems, use a reducer that is one step
slower than what is used for conventional air spray.
Paint Reduction — Industrial or Domestic
Coatings
Reduce and catalyze all paint to manufacturer’s
specifications. If no reductions are given, first
thoroughly mix the fluid to be sprayed. Then gradually
mix in the proper reducer, testing the fluid until you
have the correct spraying consistency.
To test the consistency, remove the stir stick from the
thinned paint. When the paint stream running off the
stir stick breaks into droplets, the first few drops should
be about one second apart.
D See HVLP Turbine Spray Gun manual 309205 for
information on turbine spray gun setup and
operation.
6 309240
Setup
Connect the Fluid and Air Supply
See Fig. 3
D The HVLP compressor/cart provides the air supply
for the remote pressure pot.
D The circled letters in Fig. 3 indicate hose line
connections.
1. Connect gun air supply hose (A) between turbine
air outlet (B) and gun air inlet (C). DO NOT use
wrench to tighten connections; hand tighten only.
The HVLP 4900 turbine uses a quick connector at
outlet (B). A wrench is not required for hose
connection.
E
C
2. If using a spray gun cup (D):
Connect the cup to the gun fluid inlet (E).
If using accessory remote pressure pot (F):
Connect fluid supply hose (G) between remote
pressure pot fluid outlet (H) and gun fluid inlet (E).
Connect pressure pot air hose (J) between
pressure pot air regulator inlet (K) and the
compressor/cart air outlet.
Connect to Electric Supply
Plug turbine power cord into grounded outlet.
NOTE: Extension cord must be 3-wire, 12 AWG, 50 ft
(15 m) or shorter.
D
cup-over option
(see manual 309205)
G
Y
remote pressure pot setup for spray gun
K
J
H
to
compressor/
cart
X
G
Y
F
A
E
C
B
D
cup setup for spray gun
X
G
H
A
X
JK
Z
Y
HVLP 4900 Turbine
F
compressor
ti7064a
to
21/2-gallon remote pressure pot
Fig. 3
2-quart remote pressure pot
4958C
309240 7
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