Page 1
Operation
390™ Electric Airless Sprayers
- For portable spray applications of architectural paints and coatings -
3300 psi (227 bar, 22.7 MPa) Maximum Working Pressure
Important Safety Instructions
Read all warnings and instructions in this manual.
Save these instructions.
310820H
EN
Hi-Boy
ti11626a
ProStep
ti11583a
Page 2
Contents
Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Component Identification . . . . . . . . . . . . . . . . . . . . 6
Pressure Relief Procedure . . . . . . . . . . . . . . . . . . . 7
Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Clearing Clogs . . . . . . . . . . . . . . . . . . . . . . . . . 13
Platform Access Position (826098) . . . . . . . . . . . 15
Platform Transport Position (826098) . . . . . . . . . 16
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2 310820H
Page 3
Warning
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.
Grounding Instructions
This product must be grounded. In the event of an electrical short circuit, grounding reduces the risk of electric shock
by providing an escape wire for the electric current. This product is equipped with a cord having a grounding wire with
an appropriate grounding plug. The plug must be plugged into an outlet that is properly installed and grounded in
accordance with all local codes and ordinances.
WARNING
GROUNDING
• Improper installation of the grounding plug is able to result in a risk of electric shock.
• When repair or replacement of the cord or plug is required, do not connect the grounding wire to either flat blade
terminal.
• The wire with insulation having an outer surface that is green with or without yellow stripes is the grounding wire.
• Check with a qualified electrician or serviceman when the grounding instructions are not completely
understood, or when in doubt as to whether the product is properly grounded.
• Do not modify the plug provided; if it does not fit the outlet, have the proper outlet installed by a qualified
electrician.
• This product is for use on a nominal 120V circuit and has a grounding plug similar to the plug illustrated in the
figure below.
• Only connect the product to an outlet having the same configuration as the plug.
• Do not use an adapter with this product.
Extension Cords:
• Use only a 3-wire extension cord that has a 3-blade grounding plug and a 3-slot receptacle that accepts the plug
on the product.
• Make sure your extension cord is not damaged. If an extension cord is necessary, use 12 AWG
(2.5 mm
• An undersized cord results in a drop in line voltage and loss of power and overheating.
310820H 3
2
) minimum to carry the current that the product draws.
Page 4
WARNING
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:
• Do not spray flammable or combustible materials near an open flame or sources of ignition such as cigarettes,
motors, and electrical equipment.
• Paint or solvent flowing through the equipment is able to result in static electricity. Static electricity creates a risk
of fire or explosion in the presence of paint or solvent fumes. All parts of the spray system, including the pump,
hose assembly, spray gun, and objects in and around the spray area shall be properly grounded to protect
against static discharge and sparks. Use Graco conductive or grounded high-pressure airless paint sprayer
hoses.
• Verify that all containers and collection systems are grounded to prevent static discharge.
• Connect to a grounded outlet and use grounded extensions cords. Do not use a 3-to-2 adapter.
• Do not use a paint or a solvent containing halogenated hydrocarbons.
• Keep spray area well-ventilated. Keep a good supply of fresh air moving through the area. Keep pump assembly
in a well ventilated area. Do not spray pump assembly.
• Do not smoke in the spray area.
• Do not operate light switches, engines, or similar spark producing products in the spray area.
• Keep area clean and free of paint or solvent containers, rags, and other flammable materials.
• Know the contents of the paints and solvents being sprayed. Read all Material Safety Data Sheets (MSDS) and
container labels provided with the paints and solvents. Follow the paint and solvents manufacturer’s safety
instructions.
• Fire extinguisher equipment shall be present and working.
• 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.
SKIN INJECTION HAZARD
• Do not aim the gun at, or spray any person or animal.
• Keep hands and other body parts away from the discharge. For example, do not try to stop leaks with any part
of the body.
• Always use the nozzle tip guard. Do not spray without nozzle tip guard in place.
• Use Graco nozzle tips.
• Use caution when cleaning and changing nozzle tips. in the case where the nozzle tip clogs while spraying,
follow the Pressure Relief Procedure for turning off the unit and relieving the pressure before removing the
nozzle tip to clean.
• Do not leave the unit energized or under pressure while unattended. When the unit is not in use, turn off the unit
and follow the Pressure Relief Procedure for turning off the unit.
• High-pressure spray is able to inject toxins into the body and cause serious bodily injury. In the event that
injection occurs, get immediate surgical treatment.
• Check hoses and parts for signs of damage. Replace any damaged hoses or parts.
• This system is capable of producing 3300 psi. Use Graco replacement parts or accessories that are rated a
minimum of 3300 psi.
• Always engage the trigger lock when not spraying. Verify the trigger lock is functioning properly.
• Verify that all connections are secure before operating the unit.
• Know how to stop the unit and bleed pressure quickly. Be thoroughly familiar with the controls.
4 310820H
Page 5
WARNING
WARNING
EQUIPMENT MISUSE HAZARD
Misuse can cause death or serious injury.
• Always wear appropriate gloves, eye protection, and a respirator or mask when painting.
• Do not operate or spray near children. Keep children away from equipment at all times.
• Do not overreach or stand on an unstable support. Keep effective footing and balance at all times.
• Stay alert and watch what you are doing.
• Do not operate the unit when fatigued or under the influence of drugs or alcohol.
• Do not kink or over-bend the hose.
• Do not expose the hose to temperatures or to pressures in excess of those specified by Graco.
• Do not use the hose as a strength member to pull or lift the equipment.
Misuse of the sprayer platform can cause death or serious injury.
• Do not exceed platform rating.
• Make sure sprayer is on firm, level, non-slippery, secure foundation before accessing sprayer platform.
• Make sure platform has been properly secured to frame before standing on platform.
• If you are unable to step up to sprayer platform, use a stable intermediate stepping device for stepping up to
sprayer platform or stepping down from sprayer platform.
• Keep both feet squarely and firmly on platform.
• Do not allow sprayer frame to come in contact with live electrical wires.
• Do not over reach while on sprayer platform.
• Do not position sprayer behind any doors when on sprayer platform.
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.
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
310820H 5
Page 6
Component Identification
A
F
Component Identification
P
S
R
B
U
B
K
E
M
A
N
U
E
H
English
A Pressure Control
BON/OFF switch
DPower Cord
E Fluid Outlet
FPrime Valve
HPump
J Suction Hose
KDrain Hose
MFluid Hose
NGun
PTip
RGuard
S Trigger Safety Lock
T Model/Serial Tag
UFilter
VPlatform
H
D
K
J
T
F
D
T
J
ti12008a
V
6 310820H
Page 7
Pressure Relief Procedure
English
Follow this Pressure Relief Procedure whenever you stop spraying
and before cleaning, checking, servicing, or transporting equipment.
TI
Pressure Relief Procedure
ti5316a
/.
/&&
TIA
1 Turn pressure control to lowest
pressure.
2 Hold gun against side of grounded
metal flushing pail. Trigger gun to
relieve pressure.
3 Turn prime valve down.
If you suspect spray tip or hose is clogged or
pressure is not fully relieved, VERY SLOWLY
loosen tip guard retaining nut or hose end
coupling to relieve pressure. Then loosen
completely.
4 Turn power switch OFF, if unit is being
shut down or will be left unattended.
310820H 7
Page 8
Grounding
English
The sprayer must be grounded. Grounding reduces the
risk of static and electric shock by providing an escape
wire for the electrical current due to static build up or in
the event of a short circuit.
Grounding
ti2810a
• The sprayer cord includes a grounding wire with an appropriate grounding contact. • The plug must be plugged into an
outlet that is properly installed and
grounded in accordance with all
local codes and ordinances.
Ground
ti4297a
120 volt plug
Power Requirements Extension Cords
• Do not modify plug! If it will not fit
in outlet, have grounded outlet
installed by a qualified
electrician. Do not use an
adapter.
• 100-120V units require
100-120 VAC, 50/60 Hz, 11A,
1 phase.
• 230V units require 230 VAC,
50/60 HZ, 7.5A, 1 phase.
• Use an extension cord with an
undamaged ground contact.
• If an extension cord is necessary,
use a 3-wire, 12 AWG (2.5 mm
minimum.
2
)
8 310820H
Page 9
Pails
• Solvent and oil/based fluids:
follow local code. Use only
conductive metal pails, placed on
a grounded surface such as
concrete.
Setup
• Do not place pail on a
nonconductive surface such as
paper or cardboard which
interrupts grounding continuity.
ti5850a
ti5851a
• Grounding a metal pail: connect a
ground wire to the pail by clamping
one end to pail and other end to a
true earth ground such as a water
pipe.
TIAB
• To maintain grounding
continuity when flushing or
relieving pressure: hold metal
part of spray gun firmly to side
of a grounded metal pail. Then
trigger gun.
ti2769a
ti5300a
1 Connect Graco airless hose
to sprayer.
ti2702b
2 Connect other end of hose
to gun.
ti2703b
3 Tighten securely. 4 Remove tip guard.
Tighten securely.
310820H 9
Page 10
/.
Setup
ti5316a
ti2810a
ti5301a
5 Check inlet strainer for clogs
and debris.
ti5735b
6 Fill throat packing nut with
TSL to prevent premature
packing wear.
Do this each time you spray.
ti5856a
Flush
/&&
7 Turn power OFF. 8 Plug power supply cord
into a properly grounded
electrical outlet.
9 Turn prime valve down. 10 Place siphon tube set in grounded metal pail pratially filled with flushing fluid. See Grounding,
page 9. Do steps 1- 6 of Startup, page 11, to flush out storage oil shipped in sprayer. Use water to
flush water-based paint or mineral spirits to flush oil-based paint and storage oil.
10 310820H
Page 11
Startup
Startup
ti5305a
1 Turn pressure control to
lowest pressure.
ti5303a
1/4 turn
15 sec.
ON
OFF
2 Turn power ON. 3 Increase pressure 1/4 turn
ti5307a
to start motor. Allow fluid
to circulate through drain
tube for 15 seconds.
TIA
4 Turn prime valve
horizontal.Take spray gun
trigger safety OFF.
TIAB
5 Hold gun against grounded
metal flushing pail. Trigger
gun and flush 1 minute.
6 Inspect for leaks. Do not stop
leaks with hand or a rag! If
leaks occur, perform
Pressure Relief, page 7.
Tighten fittings.
7 Place siphon tube in paint
pail.
TIA
8 Trigger gun again into
flushing pail until paint
appears.
310820H 11
Page 12
20 seconds
Startup
ti2710a
9 Move gun to paint pail and
trigger for 20 seconds. Set
gun safety ON.
heavy
edges
ti2757a
1 Spray test pattern. Adjust
pressure to eliminate heavy
edges.
10 Screw tip assembly onto
gun. Tighten. For gun
assembly instructions, see
gun manual, 309639.
2 Use smaller tip size if
pressure adjustment cannot
eliminate heavy edges.
ti2758a
3 Hold gun perpendicular,
10-12 in. from surface. Spray
back and forth; overlap by
50%.
4 Trigger gun before moving.
Release before stopping. For
additional spraying information,
see gun manual 309639.
12 310820H
Page 13
Clearing Clogs
Startup
ti2760a
1 Release trigger, put safety ON. Rotate Spray Tip. Take safety OFF.
Trigger gun to clear clog.
Cleanup
ti2769a
1 Relieve Pressure,
page 7.
2 Remove guard and Spray
Tip. For additional
information, see gun
manual 309639.
2 Put safety ON. Return Spray Tip to original position. Take safety
OFF and continue spraying.
Flush
TI"
TIA
3 Remove siphon tube set
from paint. Wipe excess
paint off outside of tubes.
4 Place siphon tube in
flushing fluid. Use water for
water base paint and
mineral spirits for oil base
paint. Place drain tube in
waste pail.
Waste
310820H 13
Page 14
1/4 Turn
Startup
TIA
5 Turn prime valve
horizontal.
ti5848a
Flushing
Fluid
9 Raise siphon tube above
flushing fluid.
Paint
TIA
6 Hold gun against paint pail. Take
trigger safety OFF. Trigger gun
and increase pressure until the
pump runs steady and flushing
fluid appears
Flush
10 Close drain valve. Trigger gun
into flushing pail to purge fluid
from hose.
Waste
7 Stop triggering gun. Move
gun to waste pail, hold gun
against pail, trigger gun to
thoroughly flush system.
/.
/&&
11 Turn pressure control knob
all the way down and power
switch OFF. Unplug sprayer.
TIA
8 While continuing to trigger
gun, turn prime valve down.
Then, release gun trigger.
Allow flushing fluid to
circulate until fluid coming out
of drain tube is clear.
TIA
12 If you have a filter
installed on your
sprayer, remove filter.
Clean and inspect.
Install filter.
ti2895a
13 Remove filter from gun if
installed. Clean and
inspect. Install filter. See
gun manual 309639.
14 If flushing with water, flush
again with mineral spirits or
Pump Armor to leave a
protective coating to
prevent freezing or
corrosion.
14 310820H
ti2776a
Pump Armor
15 Wipe sprayer, hose and gun
with a rag soaked in water
or mineral spirits.
Page 15
Platform Access Position (826098)
Platform Access Position (826098)
To avoid falling, make sure
sprayer is on a firm, level,
non-slippery, secure foundation
before standing on sprayer
platform.
ti11587a
The sprayer platform is
reversible, and can be installed
facing either direction.
To install the platform, perform
the following steps:
To avoid electrocution, do not
allow sprayer frame to come in
contact with live electrical wires.
G
ti11586a
1 Slide platform guiding
plate (G) into sprayer
frame.
To avoid falling, do not over reach
while standing on sprayer
platform.
H
ti11612a
2 Align groove
underneath
platform with
sprayer
handle (H).
If you are unable to step up to
sprayer platform, use a stable
intermediate stepping device.
P
ti11585a
3 Press other end of platform down onto
opposite end of sprayer frame. Make
sure frame peg (P) is aligned with slot
underneath platform.
CAUTION: If the frame peg (P) is not
aligned with the slot underneath
platform, the platform will not be fully
resting on the sprayer frame and will be
unsafe to stand on.
310820H 15
Page 16
Platform Transport Position (826098)
Platform Transport Position (826098)
ti11584a
Attach the platform to the side of
the sprayer frame to access the
handle and transport the sprayer.
P
ti11605a
1 Lift platform off peg (P) side
of sprayer frame.
G
ti11607a
2 Slide guiding plate (G) off
opposite side of frame and
lift platform off of sprayer.
G
ti11603a
3 Slide guiding plate (G) onto
either side of sprayer frame.
ti11604a
4 Align clips on opposite side
of platform with sprayer
frame and push until it
snaps onto frame.
ti11584a
ti11606a
NOTE: Platform is reversible and
can be attached to either side of
the sprayer frame.
16 310820H
Page 17
Technical Data
Technical Data
Power requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100/120V AC, 50/60 hz, 11A, 1 phase
230V AC, 50/60 hz, 7.5A, 1 phase
Generator required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3000 w minimum
Maximum working pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3300 psi (22.7 MPa, 227 bar)
Cycles per gallon (liter). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 680 (180)
Maximum delivery gpm (lpm) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.47 (1.8)
Maximum tip size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.021
Fluid outlet npsm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1/4 in.
Dimensions (Hi-Boy):
Length. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22.0 in. (55.9 cm)
Width . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20.5 in. (52.1 cm)
Height . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38.8 in. (98.6 cm)
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 lbs (25.9 kg)
Dimensions (ProStep):
Length. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20.0 in. (50.8 cm)
Width . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15.5 in. (39.4 cm)
Height . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19.25 in. (48.9 cm)
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 lb (18.1 kg)
Wetted parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . zinc and nickel-plated carbon steel, nylon, stainless steel, PTFE, Acetal,
Noise level*
Sound power (IS0 3744) 100dBa*
Sound pressure (ISO 3744) 90 dBa*
*Measured 3 feet (1 meter) from equipment.
leather, UHMWPE, aluminum, tungsten carbide
310820H 17
Page 18
Warranty
Graco warrants all equipment referenced in this document which is manufactured by Graco and bearing its name to be free from defects in
material and workmanship on the date of sale to the original purchaser for use. With the exception of any special, extended, or limited warranty
published by Graco, Graco will, for a period of twelve months from the date of sale, repair or replace any part of the equipment determined by
Graco to be defective. This warranty applies only when the equipment is installed, operated and maintained in accordance with Graco’s written
recommendations.
This warranty does not cover, and Graco shall not be liable for general wear and tear, or any malfunction, damage or wear caused by faulty
installation, misapplication, abrasion, corrosion, inadequate or improper maintenance, negligence, accident, tampering, or substitution of
non-Graco component parts. Nor shall Graco be liable for malfunction, damage or wear caused by the incompatibility of Graco equipment with
structures, accessories, equipment or materials not supplied by Graco, or the improper design, manufacture, installation, operation or maintenance
of structures, accessories, equipment or materials not supplied by Graco.
This warranty is conditioned upon the prepaid return of the equipment claimed to be defective to an authorized Graco distributor for verification of
the claimed defect. If the claimed defect is verified, Graco will repair or replace free of charge any defective parts. The equipment will be returned
to the original purchaser transportation prepaid. If inspection of the equipment does not disclose any defect in material or workmanship, repairs will
be made at a reasonable charge, which charges may include the costs of parts, labor, and transportation.
THIS WARRANTY IS EXCLUSIVE, AND IS IN LIEU OF ANY OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
TO WARRANTY OF MERCHANTABILITY OR WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE.
Graco’s sole obligation and buyer’s sole remedy for any breach of warranty shall be as set forth above. The buyer agrees that no other remedy
(including, but not limited to, incidental or consequential damages for lost profits, lost sales, injury to person or property, or any other incidental or
consequential loss) shall be available. Any action for breach of warranty must be brought within two (2) years of the date of sale.
GRACO MAKES NO WARRANTY, AND DISCLAIMS ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE, IN CONNECTION WITH ACCESSORIES, EQUIPMENT, MATERIALS OR COMPONENTS SOLD BUT NOT
MANUFACTURED BY GRACO. These items sold, but not manufactured by Graco (such as electric motors, switches, hose, etc.), are subject to
the warranty, if any, of their manufacturer. Graco will provide purchaser with reasonable assistance in making any claim for breach of these
warranties.
In no event will Graco be liable for indirect, incidental, special or consequential damages resulting from Graco supplying equipment hereunder, or
the furnishing, performance, or use of any products or other goods sold hereto, whether due to a breach of contract, breach of warranty, the
negligence of Graco, or otherwise.
ADDITIONAL WARRANTY COVERAGE
Graco does provide extended warranty and wear warranty for products described in the “Graco Contractor Equipment Warranty Program”.
Graco Information
For the latest information about Graco products, visit www.graco.com.
TO PLACE AN ORDER, contact your Graco distributor or call 1-800-690-2894 to identify the nearest distributor.
All written and visual data contained in this document reflects the latest product information available at the time of publication.
GRACO INC. AND SUBSIDIARIES • P.O. BOX 1441 • MINNEAPOLIS MN 55440-1441 • USA
Copyright 2005, Graco Inc. All Graco manufacturing locations are registered to ISO 9001.
Graco reserves the right to make changes at any time without notice.
For patent information, see www.graco.com/patents.
Original instructions. This manual contains English, MM 310820
Graco Headquarters: Minneapolis
International Offices: Belgium, China, Japan, Korea
www.graco.com
Revised January 2013
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