Graco 3A8429A, GX21 Cordless Electric Airless Sprayers Owner's Manual

Operation, Parts
GX21 Cordless Electric
Airless Sprayers
3A8429A
EN
For portable airless spraying of architectural paints and coatings. Not
approved for use in explosive atmospheres or hazardous (classified)
locations. For professional use only.
GX21 Cordless Models: 25T973, 25T967
3000 psi (207 bar, 20.7 MPa) Maximum Working Pressure
Important Safety Instructions
Read all warnings and instructions in this manual and related manuals. Be familiar with
the controls and the proper usage of the equipment. Save these instructions.
Related Manuals
Gun – 312830 (SG3)
Pump – 3A3172
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www.graco.com/techsupport
Use only genuine Graco replacement parts.
The use of non-Graco replacement parts may void warranty.
Contents
Contents
Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Important Grounding Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Know Your Sprayer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Grounding Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Pails . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Battery Installation and Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Pressure Relief Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Flush Storage Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Fill Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Fill Gun and Hose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
How to Spray . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Spray Tip Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Spray . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Adjust Pressure Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Tip and Pressure Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Spray Techniques . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Triggering Gun . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Aiming Gun . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Spray Pattern Quality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Clear Tip Clog . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Cleanup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Power Flush . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Cleaning InstaClean™ Fluid Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Clean the Gun . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Spray Tip Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Cleaning Fluid Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Quick Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Airless Hoses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Spray Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Pump Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
GX21 Cordless Airless Sprayer Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Pump Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
California Proposition 65 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Graco Standard Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Graco Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
2
3A8429A
Models
Models
Model
GX21 Cordless
Region
UK
Stand
Battery
Charger
Voltage VDC Voltage VAC
25T973
54
GX21 Cordless
EMEA
230
25T967
The GX21 Electric Airless Sprayer is compatible with the following DEWALT FLEXVOLT 54V
and 60V batteries:
•
•
•
•
•
•
DCB606 - 60V/2ah (20V/6ah)
DCB546 - 54V/2ah (18V/6ah)
DCB609 - 60V/3ah (20V/9ah)
DCB547 - 54V/3ah (18V/9ah)
DCB548 - 54V/4ah (18V/12ah)
DCB612 - 60V/4ah (20V/12ah)
Related DEWALT Manuals
Manual
Description
N463510
N463511
DEWALT DCB118-QW Fast Charger Manual UK/EMEA
(Part 1 and 2)
3A8429A
Region
3
Important Grounding Information
Important Grounding Information
Before using your sprayer read this manual for complete instructions on proper use and safety warnings.
The following information is intended to help you understand when to use the grounding wire and clamp
provided with your sprayer.
Please read the information on the material container label to determine if it is oil-based or flammable. Ask
for a Safety Data Sheet (SDS) from your supplier. The container label and SDS will explain the contents of
the material and the specific precautions related to it.
Paints, coatings and clean-up materials generally fit into one of the following 3 basic types:
4
Grounding
Wire and
Clamp
Required?
Type of Material
No
WATER-BASED: The container label should indicate that the material
can be cleaned up with soap and water.
Yes
OIL-BASED: The container label should indicate that the material is
COMBUSTIBILE and can be cleaned up with mineral spirits or
non-flammable paint thinner. Use oil-based material outdoors or in a
well-ventilated indoor area with a flow of fresh air. See the safety
warnings in this manual. Follow Grounding Instructions, page 9, when
using this type of material.
Yes
FLAMMABLE: This type of material contains flammable solvents such
as xylene, toluene, naphtha, MEK, lacquer thinner, acetone, denatured
alcohol, and turpentine. The container label should indicate that this
material is FLAMMABLE. Use flammable materials outdoors or in a
well-ventilated area with a flow of fresh air. Follow Grounding
Instructions, page 9, when using this type of material.
3A8429A
Warnings
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
symbols refer to procedure-specific risks. When these symbols appear in the body of this
manual or on warning labels, refer back to these Warnings. Product-specific hazard symbols
and warnings not covered in this section may appear throughout the body of this manual where
applicable.
FIRE AND EXPLOSION HAZARD (GROUNDING)
Oil-based and flammable materials can generate static electricity when sprayed or flushed.
Static electricity creates a risk of fire or explosion in the presence of paint or solvent fumes. To
help prevent fire and explosion when using oil-based or flammable materials:
• Connect the grounding wire and clamp to a true earth ground.
• If there is static sparking or if you feel a shock, stop operation immediately. Do not use
sprayer until you identify and correct the problem.
• 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.
Follow Grounding Instructions, page 9.
Verify that all containers and collection systems are grounded to prevent static discharge.
Do not use pail liners unless they are anti-static or conductive.
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
•
•
•
•
•
•
•
•
•
3A8429A
such as cigarettes, motors, and electrical equipment.
Do not use a paint or a solvent containing halogenated hydrocarbons.
Do not spray flammable or combustible liquids in a confined area.
Keep spray area well-ventilated. Keep a good supply of fresh air moving through the area.
Keep pump assembly in a well-ventilated area at least 20 feet (6.1 m) from the spray area
when spraying, flushing, cleaning, or servicing. Do not spray pump assembly.
Do not smoke in the spray area or spray where sparks or flame is present.
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 Safety Data Sheets
(SDSs) and container labels provided with the paints and solvents. Follow the paint and
solvent manufacturer’s safety instructions.
Keep a working fire extinguisher in the work area.
5
Warnings
SKIN INJECTION HAZARD
High-pressure spray is able to inject toxins into the body and cause serious injury that can
result in amputation. In the event that injection occurs, get immediate surgical treatment.
• 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 spray tip guard. Do not spray without spray tip guard in place.
• Use Graco spray tips.
• Use caution when cleaning and changing spray tips. In the case where the spray tip clogs
•
•
•
•
•
•
while spraying, follow the Pressure Relief Procedure for turning off the unit and relieving
the pressure before removing the spray tip to clean.
Equipment maintains pressure after power is shut off. Do not leave the equipment
energized or under pressure while unattended. Follow the Pressure Relief Procedure
when the equipment is unattended or not in use, and before servicing, cleaning, or
removing parts.
Check hoses and parts for signs of damage. Replace any damaged hoses or parts.
This system is capable of producing 3000 psi (207 bar, 20.7 MPa). Use Graco parts or
accessories that are rated a minimum of 3000 psi (207 bar, 20.7 MPa).
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.
EQUIPMENT MISUSE HAZARD
Misuse can cause death or serious injury.
• Always wear appropriate gloves, eye protection, and a respirator or mask when spraying.
• 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
•
•
•
•
•
•
•
•
•
•
•
•
6
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.
Do not spray with a hose shorter than 25 feet.
Always replace cracked, broken or missing parts immediately with genuine Graco parts.
See GX21 Cordless Airless Sprayer Parts, page 40.
Do not alter or modify equipment. Alterations or modifications may void agency approvals
and create safety hazards.
Use only in dry locations. Do not expose to water or rain.
Use in well-lit areas.
Make sure all equipment is rated and approved for the environment in which you are using it.
Do not operate or clean sprayer with the battery shield open.
3A8429A
Warnings
PRESSURIZED ALUMINUM PARTS HAZARD
Use of fluids that are incompatible with aluminum in pressurized equipment can cause serious
chemical reaction and equipment rupture. Failure to follow this warning can result in death,
serious injury, or property damage.
• Do not use 1,1,1-trichloroethane, methylene chloride, other halogenated hydrocarbon
solvents or fluids containing such solvents.
• Do not use chlorine bleach.
• Many other fluids may contain chemicals that can react with aluminum. Contact your
material supplier for compatibility.
BATTERY AND CHARGER COMPATIBILITY HAZARD
• Only use DEWALT brand 54V Max or 60V Max batteries and battery chargers with this tool.
• READ ALL INSTRUCTIONS included with this tool regarding the safety and usage of
DEWALT batteries and battery chargers.
• Do not wash or spray down battery.
• Do not clean the battery with anything other than a cloth moistened with water.
MOVING PARTS HAZARD
Moving parts can pinch, cut, or amputate fingers and other body parts.
• Keep clear of moving parts.
• Do not operate equipment with protective guards or covers removed.
• Equipment can start without warning. Before checking, moving, or servicing equipment,
follow the Pressure Relief Procedure and disconnect all power sources.
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 Safety Data Sheets (SDSs) 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
Wear appropriate protective equipment when in the work area to help prevent serious injury,
including eye injury, hearing loss, inhalation of toxic fumes, and burns. Protective equipment
includes but is not limited to:
•
•
3A8429A
Protective eyewear, and hearing protection.
Respirators, protective clothing, and gloves as recommended by the fluid and solvent
manufacturer.
7
Know Your Sprayer
Know Your Sprayer
Component Identification
A
B
C
D
E
F
G
H
J
K
L
M
N
P
8
ON/OFF Switch
Pressure Control Knob
Gun Fluid Inlet Fitting
Prime Valve
Push Prime Button
Tip Guard
Reversible Spray Tip
Airless Spray Gun
Airless Hose
Battery
Gun Trigger Lock
Drain Tube (with Diffuser)
Fluid Intake (Suction) Tube
Q
R
S
T
U
V
W
X
Gun Fluid Filter (inside handle)
Fluid Outlet Fitting (airless hose connection)
Grounding Wire with Clamp
Inlet Valve Removal Tool
Ground Adapter
Easy Access Door with Cover
Suction/Drain Tube Cup
InstaClean™ Fluid Filter (inside fluid outlet)
Y
Inlet Strainer
Z
Pump Removal Tool
Model/Serial Tag (Not shown, located on bottom
of unit.)
See Quick Reference, page 31 for more information.
ProXChange™ Pump (behind easy access door)
3A8429A
Grounding Instructions
Grounding Instructions
(Oil-based and flammable materials)
The equipment must be grounded to
reduce the risk of static sparking. A static
spark can cause fumes to ignite or explode.
A good ground provides an escape wire for
the electric current.
Plug the adapter in to a grounded outlet.
Connect the grounding wire and clamp to the
metal stud on the adapter. If the ground wire
is not long enough to reach a grounded
electrical outlet, use a 3-wire grounded
extension cord between the adapter and
outlet.
Fluid hoses: Use only electrically conductive
hoses with a maximum of 300ft. (91 m)
combined hose length to ensure grounding
continuity.
Spray gun: Grounded through connection to
a properly grounded fluid hose and pump.
The sprayer is equipped with a grounding
wire and clamp. The clamp must be
connected to a true earth ground when
spraying or flushing oil-based or flammable
materials.
A water pipe can be used as a true earth
ground. Connect the grounding wire and
clamp to a metal water pipe.
A properly grounded electrical outlet can also
be used as a true earth ground. Use the
provided outlet adapter.
3A8429A
9
Grounding Instructions
Pails
Solvent and oil-based fluids: follow local
codes and regulations. Use only conductive
metal pails, placed on a grounded surface
such as concrete.
To maintain ground continuity when
sprayer is flushed or pressure is relieved:
hold metal part of spray gun firmly to the side
of a grounded metal pail then trigger the gun.
Do not place pail on a non-conductive surface
such as paper or cardboard which interrupts
grounding continuity.
Always ground a metal pail: connect a
ground wire to the pail. Clamp one end to the
pail and the other end to a true earth ground
such as a water pipe.
ti24584a
10
3A8429A
Setup
Setup
5.
Remove tip guard. Do not lose the seal.
When unpacking sprayer for the first time or
after long term storage perform setup
procedure.
1.
Connect Graco airless hose to fluid
outlet. Use wrench to tighten securely.
ti25197a
2.
6.
Turn Pressure Control Knob all the way
left (counter-clockwise) to minimum
pressure.
7.
When unpacking sprayer for the first
time remove packaging materials from
inlet strainer. After long term storage
check inlet strainer for clogs and debris.
Connect other end of hose to gun.
Strain the Paint
ti25199a
3.
Use wrenches to tighten securely. If
hose is already connected, make sure
connections are tight.
4.
Engage trigger lock.
Previously opened paint may contain dried
paint or other debris. To avoid priming problems and spray tip clogs it is recommended
to strain the paint before using. Paint strainers are available where paint is sold. Stretch
a paint strainer over a clean pail and pour
the paint through the strainer to capture any
dried paint and debris before spraying.
ti26894a
3A8429A
11
Setup
Battery Installation and
Removal
Always start with a fully charged battery.
Do not splash or immerse battery or
charger in water. See battery and charger
information shipped with the sprayer.
2.
Install battery by aligning the battery
pack with the rails inside the sprayer and
sliding it in until the battery pack is firmly
seated. Ensure that it does not
disengage.
Replace and charge battery only in a
well-ventilated area and away from
flammable or combustible materials,
including paints and solvents.
Remove and install battery into the sprayer
as follows:
1.
12
Remove the used battery, if in place.
3A8429A
Pressure Relief Procedure
Pressure Relief Procedure
Follow the Pressure Relief
Procedure whenever you see this
symbol.
This equipment stays pressurized until
pressure is manually relieved. To help
prevent serious injury from pressurized
fluid, such as skin injection or splashed
fluid, follow the Pressure Relief
Procedure whenever sprayer is stopped
and before sprayer is cleaned or checked,
and before equipment is serviced.
1.
2.
3.
Turn pressure control to lowest setting.
4.
Hold the gun firmly to a pail, point gun
into pail. Disengage the trigger lock and
trigger the gun to relieve pressure.
5.
Engage the trigger lock.
6.
Put drain tube into a pail and place
Prime/Spray valve in PRIME position
(drain) to relieve pressure.
7.
If you suspect the spray tip or hose is
clogged or that pressure has not been
fully relieved:
Engage the trigger lock. Always engage
the trigger lock when sprayer is stopped
to prevent the gun from being triggered
accidentally.
Turn ON/OFF switch to the OFF position. Power button is illuminated when
power is ON.
3A8429A
a.
VERY SLOWLY loosen the spray
tip guard retaining nut or the hose
end coupling to relieve pressure
gradually.
b.
Loosen the nut or coupling
completely.
c.
Clear airless hose or spray tip
obstruction.
13
Operation
Operation
Prime/Spray Valve
Flush Storage Fluid
This sprayer arrives from the factory with a small
amount of test material in the system. It is
important that you flush this material from
the sprayer before using it for the first time.
See Cleaning Fluid Compatibility, page 30
and Quick Reference, page 31 for additional
information.
1. Perform Pressure Relief Procedure,
page 13.
2. Make certain ON/OFF switch is OFF.
Power button is not illuminated when
OFF.
The Prime/Spray Valve uses a lever that is
flipped between the PRIME and SPRAY
position.
SPRAY Position
a.
Separate drain tube (smaller) from
suction tube (larger).
b.
Place drain tube in a grounded waste
pail.
PRIME Position
14
3A8429A
Operation
c.
3.
Submerge suction tube in a
grounded pail partially filled with
water or flushing fluid. When
flushing with oil-based or flammable
materials, follow Grounding
Instructions, page 9.
6.
Align setting indicator with low setting
on Pressure Control Knob.
7.
Turn ON/OFF switch to ON position.
Power button is illuminated when ON.
8.
Increase pressure 1/2 turn to start
motor. Allow paint or other material to
circulate through sprayer until material
flows out the drain tube.
9.
When sprayer starts pumping, flushing
fluid and air bubbles will be purged from
system. Allow fluid to flow out of drain
tube into waste pail for 30 to 60 seconds.
Place Prime/Spray valve in PRIME
position.
4.
Install battery. See Battery Installation
and Removal, page 12.
5.
Press PushPrime button twice to
loosen inlet ball.
3A8429A
15
Operation
10. Turn ON/OFF switch to OFF position.
Power button is not illuminated when
OFF.
High-pressure spray is able to inject toxins
into the body and cause serious bodily
injury. Do not stop leaks with hand or rag.
11. Inspect for leaks. If leaks occur, perform Pressure Relief Procedure, page
13, then tighten all fittings. If there are
no leaks continue with the next step.
2.
Press ON/OFF switch to ON position.
Button is illuminated when power is ON.
3.
Wait to see paint coming out of the
drain tube.
4.
Press ON/OFF switch to OFF position.
Button is illuminated when power is
OFF.
NOTE: Some fluids may prime faster if
the ON/OFF switch is momentarily
turned off so the pump can slow and
stop. Turn ON/OFF switch on and off
several times if necessary.
Fill Pump
1.
16
Move suction tube to paint pail and
submerge suction tube in paint. When
spraying oil-based or flammable
materials, follow Grounding
Instructions, page 9.
3A8429A
Operation
Fill Gun and Hose
1.
Hold gun against waste pail. Point gun
into waste pail.
a.
b.
c.
d.
2.
Disengage trigger lock.
Pull and hold gun trigger.
Turn Prime/Spray valve to SPRAY
position.
Press ON/OFF switch to ON position. Button is illuminated when
power is ON.
ti27139a
NOTE: When motor stops sprayer is ready
to paint. If motor continues to run sprayer is
not properly primed, repeat Fill Pump and
Fill Gun and Hose.
Trigger gun into waste pail until only
paint comes out of the gun.
3.
Release trigger. Engage trigger lock.
4.
Transfer drain tube to paint pail and clip
to suction tube.
3A8429A
17
How to Spray
How to Spray
Spray Tip Installation
a.
Use spray tip to align gasket and
seal in the tip guard.
b.
Spray tip must be pushed all the
way into the tip guard. Turn spray tip
to push down.
To avoid serious injury from skin injection,
do not put your hand in front of the Spray
Tip when installing or removing the Spray
Tip or Spray Tip Guard.
To prevent spray tip leaks make certain spray
tip and tip guard are installed properly.
1.
Perform Pressure Relief Procedure,
page 13.
2.
Engage trigger lock.
3.
Verify spray tip and tip guard parts are
assembled in the order shown.
c.
4.
Turn the arrow shaped handle on
the spray tip forward to the spray
position.
Screw spray tip assembly onto the gun
and tighten.
ti27480a
18
3A8429A
How to Spray
Spray
When a RAC X™ FF LP Fine Finish Low
Pressure reversible spray tip is used,
spraying pressure can be lowered. Spraying
at a lower pressure results in less overspray
and reduces spray tip wear. Adjust the
sprayer pressure to minimize overspray.
NOTE: If spraying oil-based or flammable
material, follow Grounding Instructions,
page 9.
Atomized, evenly
distributed fan pattern
3A8429A
Tails
19
How to Spray
Adjust Pressure Control
The pressure control knob allows for infinite pressure adjustment. To reduce overspray, always start at the
lowest pressure setting and increase pressure to the minimum setting that results in an acceptable spray
pattern.
To select pressure, align symbol on pressure control knob with setting indicator on sprayer.
Tip and Pressure Selection
See table for recommended spray pressure for your material. Refer to paint (material) can for
manufacturer’s recommendations.
Maximum tip hole sizes supported by the sprayer:
– GX21: 0.021 in. (0.53 mm)
Coatings
Spray Pressure Setting
Tip Hole Size
0.011 in. (0.28 mm)
0.013 in. (0.33 mm)
0.015 in. (0.38 mm)
0.017 in. (0.43 mm)
0.019 in. (0.48 mm)
0.021 in. (0.53 mm)
Stains
Enamels
Primers
Interior Paints
Exterior Paints
Low Spray
Low Spray
High Spray
High Spray
High Spray














Fine Finish Tips
Fine Finish tips have an additional orifice that provides a finer atomization of the material.
Coatings
Size
Polyurethane
Lacquer
Sanding
Sealer
Spray Pressure Setting
0.008 in. (0.20 mm)
0.010 in. (0.25 mm)
0.012 in. (0.31 mm)
0.014 in. (0.36 mm)
0.016 in. (0.41 mm)
Low Spray
Low Spray
Low Spray






20
Enamels
Latex
High Spray
High Spray



3A8429A
How to Spray
Spray Techniques
Use a piece of scrap cardboard to practice
these basic spraying techniques before you
begin spraying the surface.
•
•
Flex wrist to keep gun pointed straight.
Fanning gun to direct spray at angle
causes uneven finish.
Hold gun 12 in. (30 cm) from surface
and aim straight at surface. Tilting gun
to direct spray angle causes an uneven
finish.
Triggering Gun
Pull trigger after starting stroke. Release
trigger before end of stroke. Gun must be
moving when trigger is pulled and released.
3A8429A
21
How to Spray
Aiming Gun
•
Aim center of spray of gun at bottom edge of
previous stroke, overlapping each stroke by
half.
Clear Tip Clog
Material may need to be thinned. If
material needs to be thinned follow
manufacturer’s recommendations.
In the event that particles or debris clog the
spray tip, this sprayer is designed with a
reversible spray tip that quickly and easily
clears the particles without disassembling the
sprayer.
See Strain the Paint, page 11 for additional
information.
1.
Release trigger. Engage trigger lock.
Rotate spray tip to unclog position.
Disengage trigger lock. Trigger gun at
waste area to clear clog.
Unclog
Spray Pattern Quality
A good spray pattern is evenly distributed as
it hits the surface.
•
Spray should be atomized (evenly distributed, no gaps at edges).
ti24674a
2.
Engage trigger lock. Rotate spray tip
back to spray position. Disengage trigger lock and continue spraying.
Spray
If tails persist when spraying at the highest
spray pressure:
•
Spray tip may be worn. See Spray Tip
Selection, page 29.
•
A smaller spray tip may be needed.
22
ti24676a
3A8429A
Cleanup
Cleanup
Cleaning the sprayer after each use results in
a trouble free start up the next time the
sprayer is used.
•
For long term storage refer to Storage,
page 28.
•
See Cleaning Fluid Compatibility,
page 30 and Quick Reference, page
31.
4.
Remove suction tube and drain tube
from paint, wipe excess paint off outside.
ti27495a
5.
Separate drain tube (smaller) from suction tube (larger).
6.
Place empty waste and flushing fluid
pails side by side.
7.
Place suction tube in flushing fluid. See
Cleaning Fluid Compatibility, page
30, for appropriate flushing fluid to use.
Place drain tube in waste pail.
To avoid serious injury from fire and
explosion when using oil-based or flammable
materials:
• Do not spray solvents through the spray
tip. Always remove tip guard and spray tip
before flushing. Clean tip guard and spray
tip in a bucket of compatible solvent.
• Clean in a well-ventilated area. Keep a
good supply of fresh air moving through
the area.
• When flushing with solvents, always
ground the sprayer and waste container.
1.
When using oil-based or flammable
material, follow Grounding
Instructions, page 9.
2.
Perform Pressure Relief Procedure,
page 13.
3.
Remove tip guard and spray tip.
ti25197a
3A8429A
23
Cleanup
8.
Turn Pressure Control Knob to the
Prime/Clean setting (the lowest setting
at which the pump will run).
Place Prime/Spray valve in PRIME position.
10. Press ON/OFF switch to power ON. Button is illuminated when ON.
11. Flush until approximately 1/3 of the flushing fluid is emptied from the pail.
12. Press ON/OFF switch to power OFF. Button is not illuminated when OFF.
NOTE: Step 13 is for returning paint in airless
paint hose to paint pail. One 50 ft (15 m) hose
holds approximately 1 quart (1 liter) of paint.
13. To recover paint in hose:
a. Hold gun firmly
b. Point gun into paint pail.
c. Disengage trigger lock.
d. Pull and hold gun trigger.
e. Place Prime/Spray valve in SPRAY
position.
gun into waste pail until flushing fluid dispensed from gun is relatively clear.
9.
f.
Press ON/OFF switch to power ON.
Button is illuminated when ON.
g. Continue to hold gun trigger until you
see paint diluted with flushing fluid
starting to come out of gun.
14. While continuing to trigger gun, quickly
move gun to redirect spray into a
grounded waste pail. Continue triggering
24
15. Stop triggering gun. Engage the trigger
lock.
16. Place Prime/Spray valve in PRIME position.
17. Press ON/OFF switch to power OFF. Button is not illuminated when OFF.
18. Clean filter. See Cleaning InstaClean™
Fluid Filter, page 27.
19. Fill unit with Pump Armor™ fluid. See
Storage, page 28.
20. Remove battery.
3A8429A
Cleanup
Power Flush
8.
(Water-based materials Only)
Turn on water. Open valve. Rinse paint
off suction tube, drain tube and inlet
strainer then close valve.
Power flushing is a faster method of flushing.
It can only be used after spraying
water-based materials.
1.
Perform Pressure Relief Procedure,
page 13.
2.
Remove spray tip and tip guard assembly from gun and place in waste pail.
3.
Place empty waste and paint pails side
by side.
ti27156a
9.
Unscrew inlet strainer from suction
tube. Place inlet strainer rinse in waste
pail.
ti27158a
4.
Lift suction tube and drain tube from
paint pail. Let paint drain into the pail.
5.
Place suction and drain tube in waste
pail.
6.
Turn Pressure Control knob to the
Prime/Clean setting (lowest setting that
the pump will run).
10. Connect garden hose to suction tube
with Power Flush attachment valve.
Leave drain tube in waste pail.
11. Press ON/OFF switch to power ON.
Power button is illuminated when ON.
7.
Screw power flush attachment valve to
garden hose. Close valve.
ti27
7155a
3A8429A
25
Cleanup
12. Open Power flush attachment valve.
16. While continuing to trigger gun, quickly
move gun to redirect spray into waste
pail. Continue triggering gun into waste
pail until flushing fluid dispensed from gun
is relatively clear.
ti27160a
13. Circulate water through sprayer, into
waste pail, for 20 seconds.
14. Press ON/OFF switch to power OFF.
Power button is not illuminated when
OFF.
NOTE: Step 15 is for returning paint in hose to
paint pail. One 50 ft (15 m) hose holds approximately 1 quart (1 liter) of paint.
15. To recover paint in hose:
a. Hold gun firmly.
b. Point gun into paint pail.
c. Disengage trigger lock.
d. Pull and hold gun trigger.
e. Place Prime/Spray valve in SPRAY
position.
17. Turn Pressure Control Knob to the
Prime/Clean setting.
18. Stop triggering gun. Engage the trigger
lock.
19. Place Prime/Spray valve in PRIME position.
f.
g.
Press ON/OFF switch to power ON.
Power button is illuminated when ON.
Continue to hold gun trigger until you
see paint diluted with flushing fluid
starting to come out of gun.
20. Press ON/OFF switch to power OFF. Button is not illuminated when OFF.
21. On sprayers with a filter, see Cleaning
InstaClean™ Fluid Filter, page 27.
22. Fill unit with Pump Armor™ storage fluid.
See Storage, page 28.
23. Remove battery.
26
3A8429A
Cleanup
Clean the Gun
Cleaning InstaClean™
Fluid Filter
1.
Perform Pressure Relief Procedure,
page 13 and remove battery, see
Battery Installation and Removal,
page 12
2.
Clean gun fluid filter with water or flushing fluid and a brush every time you
flush the system. Replace gun filter if
damaged.
3.
Remove spray tip and tip guard
assembly and clean with water or
flushing fluid and a brush.
4.
Wipe paint off outside of gun using a soft
cloth moistened with water or flushing
fluid.
(Optional)
The InstaClean Fluid Filter prevents particles
from entering paint hose. After each use,
remove and clean it to ensure peak
performance.
1.
Perform Pressure Relief Procedure,
page 13 and remove battery, see
Battery Installation and Removal,
page 12.
2.
Disconnect airless spray hose (A) from
sprayer.
3.
Unscrew outlet fitting (B).
4.
Remove InstaClean Fluid Filter (C).
C
B
A
ti27179a
5.
6.
Check InstaClean Fluid Filter (C) for
debris. If needed, clean filter with water
or flushing solvent and a soft brush.
a.
Install closed (square) end of
InstaClean Fluid Filter (C) in
sprayer.
b.
Screw outlet fitting (B) into sprayer.
Tighten outlet fitting and reconnect hose
(A) to sprayer. Use wrench to tighten
securely.
3A8429A
27
Storage
Storage
With proper storage, the sprayer will be ready
to use the next time it is needed.
Always circulate Pump Armor storage fluid
through system after cleaning. Water left in
sprayer will corrode and damage pump.
Follow Cleanup, page 23, or
Power Flush, page 25.
•
Before storing sprayer make sure all
water is drained out of sprayer and
hoses.
•
Do not allow water to freeze in sprayer
or hose.
•
Do not store sprayer under pressure.
•
Store sprayer indoors.
1.
Perform Pressure Relief Procedure,
page 13.
2.
Place suction tube in Pump Armor fluid
bottle and drain tube in waste pail.
28
3.
Place Prime/Spray valve in PRIME
position.
4.
Press ON/OFF switch to ON position.
Button is illuminated when ON.
5.
Turn pressure control knob clockwise
until the pump turns on.
6.
When storage fluid comes out of drain
tube (5-10 seconds) turn ON/OFF
switch to OFF position.
7.
Place Prime/Spray valve in SPRAY
position to keep storage fluid in sprayer
during storage.
8.
Secure a plastic bag around suction
and drain tube to catch any drips.
9.
Remove battery.
3A8429A
Reference
Reference
Understanding Tip Number
Spray Tip Selection
Selecting Tip Size
Spray tips come in a variety of hole sizes for
spraying a range of fluids. Your sprayer
includes a tip for use in most paint spraying
applications. Use coatings tables on page 20
to determine the range of recommended tip
hole sizes for each fluid type.
Hints:
•
•
•
•
As you spray, the tip wears and
enlarges. Starting with a tip hole size
smaller than the maximum will allow
you to spray within the rated flow
capacity of the sprayer.
Use larger tip hole sizes with thicker
coatings and smaller tip hole sizes with
thinner coatings.
Tips wear with use and need periodic
replacement.
Tip hole size controls flow rate - the
amount of paint that comes out of the
gun.
The last three digits of tip number (i.e.:
221413) contain information about hole size
and fan width on surface when gun is held 12
in. (30.5 cm) from surface being sprayed.
First digit when doubled
= approximate
fan width.
413 tip has
8-10 in. (20-25 cm)
fan width.
413 tip has
a 0.013 in.
hole size
Last two digits = tip hole size in thousands of an inch.
Fan Width
Fan width is the size of the spray pattern,
which determines the area covered with each
stroke.
Hints:
•
Select a fan width best suited to the
surface being sprayed.
•
Wider fans allow provide better coverage on broad, open surfaces.
•
Narrower fans provide better control on
small, confined surfaces.
3A8429A
29
Reference
Cleaning Fluid
Compatibility
•
When spraying water-based materials,
flush the system thoroughly with water.
•
When spraying oil-based or flammable
materials, flush the system thoroughly
with mineral spirits or compatible
flushing solvent. When flushing with
solvents, always follow Grounding
Instructions, page 9.
•
To spray water-based materials after
spraying oil-based or flammable
materials, flush the system thoroughly
with water first. The water flowing out of
drain tube should be clear and solvent-free before you begin spraying the
water-based material.
•
To spray oil-based or flammable
materials after spraying water-based
materials, flush the system thoroughly
with mineral spirits or a compatible
flushing solvent first. The solvent flowing out of the drain tube should not contain any water. When flushing with
solvents always follow Grounding
Instructions, page 9.
To avoid fluid splashing back on your
skin or into your eyes, always aim gun at
inside wall of pail.
•
30
3A8429A
Reference
Quick Reference
Page 8 Name
Description
A
B
ON/OFF switch
Pressure control knob
C
D
Gun fluid inlet fitting
Prime valve
E
F
G
PushPrime button
Tip guard
Reversible spray tip
H
J
Airless spray
Airless hose
K
Battery
L
M
Gun trigger lock (page 9)
Drain tube
N
P
Fluid intake (suction) tube
ProXChange™ Pump
Q
R
S
T
Gun fluid filter
Fluid outlet fitting
Grounding wire with clamp
Inlet Valve Removal Tool
U
Outlet Ground Adapter
V
Easy Access Door
W
X
Suction/Drain Tube Cup
InstaClean™ fluid filter
Y
Z
Inlet strainer
Pump Removal Tool
Turns sprayer ON and OFF.
Increases (clockwise) and decreases
(counter-clockwise) fluid pressure in pump, hose,
and spray gun. To select function, align symbol on
pressure control knob with setting indicator, page
13.
Threaded connection for airless hose.
• In PRIME position directs fluid to drain tube.
• In SPRAY position directs pressurized fluid to
paint hose.
• Automatically relieves system pressure in overpressure situations.
Taps the inlet ball when pushed to loosen it.
Reduces risk of fluid injection injury.
• Atomizes fluid being sprayed, forms spray pattern
and controls fluid flow according to hole size.
• Reverse position unclogs plugged tips without
disassembly.
Dispenses fluid.
Transports high-pressure fluid from pump to spray
gun.
Provides power to the sprayer (see page 3 for compatible batteries).
Prevents accidental triggering of spray gun.
Drains fluid in system during priming and pressure
relief.
Draws fluid from paint pail into pump.
Pumps and pressurizes fluid and delivers it to paint
hose.
Filters fluid entering spray gun to reduce tip clogs.
Threaded connection for airless hose.
Provides means to maintain good ground continuity.
Cut out in the frame provide the tools to quickly
remove/install the inlet valve without additional tools.
Provides a means to attach grounding wire clamp to
grounded electrical outlet.
Easy Access Door permits quick access to the
pump. Open pump door by pulling out on the tabs
while sliding door away from the pump inlet.
Holds suction and drain hoses.
• Filters fluid coming out of pump to reduce tip
plugging and improve finish.
• Self cleans only during pressure relief.
Prevents debris from entering pump.
Use cut out in the frame to remove/install pump
packing.
3A8429A
31
Maintenance
Maintenance
Routine maintenance is important to ensure proper operation of your sprayer.
Activity
Interval
Inspect/clean InstaClean filter, fluid inlet strainer, and gun
filter.
Inspect motor shroud openings for blockage.
Daily or each time you spray
Daily or each time you spray
Pump Removal
NOTICE
Protect the internal drive parts of this
sprayer from water. Openings in shroud
allow cooling of mechanical parts and
electronics inside. If water gets into these
openings, the sprayer could malfunction or
be permanently damaged.
Airless Hoses
Check hose for damage every time you
spray. Do not attempt to repair hose if hose
jacket or fittings are damaged. Do not use
hoses shorter than 25 ft (7.6 m). Wrench
tighten, using two wrenches.
Always perform Pressure Relief Procedure,
page 13 and remove battery, see Battery
Installation and Removal, page 12, before
starting any pump repairs.
1.
Pull tabs on sides of the easy access
door pump towards you while pushing
the entire door away from the inlet end of
the pump.
2.
Now lift the door so that it swivels out of
the way.
1
Spray Tips
•
Always clean tips with compatible
cleaning fluid and brush after spraying.
•
Tips may require replacement after 15
gallons (57 liters) or they may last
through 60 gallons (227 liters) depending on abrasiveness of paint.
Pump Repair
2
3
When pump packings wear, paint will begin
to leak down outside of pump.
•
•
32
Purchase a pump repair kit and install
according to instructions provided with
kit, before your next job.
ti27463a
See Pump Assembly, page 42 or consult a Graco authorized retailer, distributor, or service center.
3A8429A
Maintenance
3.
Slide pump assembly off the mounting
pins.
Inlet Valve Removal
An integrated tool is included in the frame to
remove the inlet valve assembly from the
pump. If you suspect that the inlet valve is
clogged or stuck, remove the valve assembly
and clean or replace.
1.
Remove suction tube or hopper from
sprayer.
2.
Insert pump inlet into frame and loosen
the inlet valve. Remove inlet valve.
ProXChange Removal Tool
An integrated tool is included in the frame to
remove the ProXChange packing assembly.
See Pump repair manual for complete repair
instructions.
NOTICE
Do not lose the ball and spring inside the inlet
valve assembly. It may fall out when the inlet
valve is removed. Pump will not prime without
the ball and spring.
ti27498a
3A8429A
33
Maintenance
3.
Clean any debris and dried paint from
the cavity and replace the ball and
spring. Tighten inlet valve to pump
using integrated tool on the frame.
Swing easy access door pump door
closed while pushing the entire door
towards the inlet end of the pump.
1
Pump Installation
1.
3.
Slide pump assembly onto the mounting
pins.
2
3
ti27478a
2.
Move pump displacement rod up or
down until cap is level with the opening
in the yoke.
NOTE: Door must be fully closed and
latched before sprayer will operate.
ti27037a
34
3A8429A
Troubleshooting
Troubleshooting
Problem
Motor does not run:
(verify battery is installed correctly and
fully charged, and power switch is on)
1.
Follow Pressure Relief Procedure,
page 13, before checking or repairing.
2.
Solutions at the beginning of each problem listed are the most common. Start
at the beginning and continue down the
list to find a solution.
3.
Check everything in this Troubleshooting
Table before you bring the sprayer to an
authorized service center.
Cause
Easy access door not fully closed.
Pressure control knob is set at zero
pressure.
Pump is seized
(Paint has hardened in pump
or
Water is frozen in pump.)
Motor or control is damaged.
Battery has insufficient charge.
Battery is defective.
3A8429A
Solution
Verify that easy access door is closed
and latched. See page 34.
Turn pressure control knob clockwise to
increase pressure setting.
Turn ON/OFF switch off and remove
battery.
If frozen do NOT try to start sprayer until
it is completely thawed or it may
damage the motor, control board and/or
drive train.
Place sprayer in warm area for several
hours.
If not frozen, check for hardened paint in
pump. If paint has hardened in pump.
See Pump Removal, page 32.
If motor does not turn with pump
repaired, consult a Graco authorized
retailer, distributor, or service center.
Consult a Graco authorized retailer,
distributor, or service center.
Charge battery.
Replace battery.
35
Troubleshooting
Problem
Sprayer runs, but pump does not prime
or looses prime while in use.
(Pump cycles but does not pump paint
or build pressure.)
Cause
Solution
Inlet valve check ball is stuck.
Press PushPrime button to dislodge the
ball allowing pump to prime properly,
OR Power Flush sprayer, see page 25.
Prime/Spray Valve is in SPRAY
Turn Prime/Spray Valve down to PRIME
position.
position until paint exits drain tube. The
pump is now primed.
Pump was not primed with flushing fluid. Remove suction tube from paint. Prime
(Thick fluids may not prime if not initially pump with oil or water-based flushing
fluid. See page 14.
primed with flushing fluid.)
Debris in paint.
Thick or “sticky” paint.
Strain the paint. See page 11.
Some fluids may prime faster if the
ON/OFF switch is momentarily turned
off so the pump can slow and stop. Turn
ON/OFF switch on and off several times
if necessary.
Inlet strainer is clogged or suction tube Clean debris off inlet strainer and make
is not immersed in paint.
sure suction tube is immersed in paint.
Inlet valve check ball or seat is dirty.
Remove inlet fitting. Clean or replace
ball and seat. See page 33.
Suction tube is leaking.
Inspect suction tube connection for
cracks or vacuum leaks.
Outlet valve check ball is stuck.
Unscrew outlet valve, remove, and
clean assembly.
Prime/Spray Valve is worn or obstructed Take sprayer to Graco authorized
with debris.
service center.
36
3A8429A
Troubleshooting
Problem
Pump is primed, but can not achieve
good spray pattern.
Cause
Spray tip may be partially clogged.
Reversible spray tip is in UNCLOG
position.
Debris in paint.
Pressure is set too low.
InstaClean fluid filter is clogged.
Spray gun fluid filter is clogged.
Spray tip selected is too large for
capability of sprayer.
Spray tip is worn beyond the capability
of sprayer.
Spray tip gasket and seal worn or
missing.
Inlet strainer is clogged or suction tube
is not immersed in paint.
Battery has insufficient charge for tip
support.
Inlet pump valve or outlet pump valve is
worn or clogged with debris.
Material is too thick.
Spray gun stopped spraying while
trigger is pulled.
Airless hose is too long (if extra section
was added).
Spray tip is clogged.
Sprayer lost prime.
When paint is sprayed, it runs down the Material is going on too thick.
wall or sags.
3A8429A
Solution
Clear spray tip clog. See, Clear Tip
Clog, page 22.
Rotate arrow-shaped handle on spray
tip so it points forward to SPRAY
position. See page 22.
Strain the paint. See page 11.
Align pressure control knob setting
indicator to desired spray setting. See
page 20.
Clean or replace InstaClean fluid filter.
See page 27.
Clean or replace gun fluid filter. See
page 27.
Replace tip. See page Spray Tip
Installation, page 18.
Replace tip. See Spray Tip
Installation, page 18.
Replace gasket and seal. See page 18.
Clean debris off inlet strainer and make
sure suction tube is immersed in paint.
Charge battery or reduce tip size.
Check for worn or contaminated inlet
valve or outlet valve.
- Prime sprayer with paint
- Trigger gun momentarily
- When trigger is released, pump should
cycle momentarily and stop
- If pump continues to cycle, pump
valves may be worn or contaminated
with debris
- Clean or replace valves with
appropriate kits. See page 40.
Thin material. Follow manufacturer’s
recommendations.
Remove section of airless hose.
Clear spray tip clog. See,Clear Tip
Clog, page 22.
See troubleshooting section “Sprayer
runs, but pump does not prime or looses
prime while in use.” on page 36.
Move gun faster.
Choose a spray tip with smaller hole
size.
Choose spray tip with wider fan.
Make sure gun is far enough from
surface.
37
Troubleshooting
Problem
Cause
When paint is sprayed, coverage is
inadequate.
Material is going on too thin.
Fan pattern varies dramatically while
spraying.
Cannot trigger spray gun.
Pressure control switch is worn and
causing excessive pressure variation.
Spray gun trigger lock is engaged.
Paint is coming out of pressure control.
Pressure control is worn.
Paint is leaking through drain tube.
Sprayer is over pressurizing.
Paint leaks down outside of pump.
Pump packings are worn.
Motor is hot and runs intermittently.
Motor automatically shuts off due to
excessive heat. Damage can occur if
cause is not corrected.
Vent holes in enclosure are plugged or
sprayer is covered.
Sprayer makes no sound when pressure control is ON and ON/OFF switch
is ON (illuminated).
ON/OFF switch light blinks two times
when pressure control is ON. Indicates
incorrect voltage.
Battery has insufficient charge.
Motor needs to be replaced.
ON/OFF switch light blinks three times
when pressure control is ON. Indicates
battery temperature is too hot or too
cold.
ON/OFF switch does not illuminate
when pressed.
38
ON/OFF switch light blinks four times
when pressure control is ON. Indicates
locked rotor condition.
ON/OFF switch light blinks five times
when pressure control is ON. Indicates
motor temperature is too hot.
Indicates battery is not installed, has
insufficient charge, or is damaged.
Control board is damaged.
Solution
Move gun slower.
Choose spray tip with larger hole size.
Choose spray tip with narrower fan.
Make sure gun is close enough to
surface.
Take sprayer to Graco authorized
service center.
Rotate trigger lock to disengage trigger
lock. See page 9.
Take sprayer to Graco authorized
service center.
Take sprayer to Graco authorized
service center.
Replace pump packings with new
ProXChange module. See page 32.
Keep vent holes clear of obstructions
and overspray and keep sprayer open to
air.
Charge battery.
Take sprayer to Graco authorized
retailer, distributor, or service center.
Replace battery with charged battery.
Battery has reached end of life. Replace
battery.
Motor damaged, replace motor
assembly.
Allow battery to cool down or warm up to
room temperature.
Replace pump and/or motor assembly.
Allow motor to cool down to room
temperature.
Install battery correctly, ensure battery is
fully charged, or replace battery.
Replace control board.
3A8429A
Notes
Notes
3A8429A
39
GX21 Cordless Airless Sprayer Parts
GX21 Cordless Airless Sprayer Parts
Ref.
40
Torque
Ref.
Torque
1
110-120 in-lb (12 - 14 N•m)
4
35-45 in-lb (4.0 - 5.0 N•m)
2
30-35 in-lb (3.5 - 4.0 N•m)
5
23-27 in-lb (2.6 - 3.0 N•m)
3
8-10 in-lb (0.9 - 1.2 N•m)
6
80-90 in-lb (9.0 - 10.2 N•m)
Ref.
7
Torque
180-220 in-lb (20.3-24.9 N•m)
3A8429A
GX21 Cordless Airless Sprayer Parts
Parts List
Ref. Part
1*
2
20A066
17J869
Description
KIT, motor, includes 34
KIT, gear and yoke, includes
5
3
17D161 TUBE, suction, assembly
includes 3a-3f, 46
3a
195108 TUBE, drain
3b
116295 CLAMP, tube
3c
195400 CLIP, tube
3d
115489 CLAMP, drain tube
3e
115099 WASHER, hose
3f
288716 STRAINER
5
17J864 KIT, yoke
7
17J908 PUMP, displacement
8
20A566 KIT, shield, motor, includes
9, 28, 48, 70, 71, 93
9
118444 SCREW, mach, hwhd 10-24
x 0.5 in.
10
17J866 KIT, cover, frt, includes 9,
10a, 10b, 10c, 12
10a 17F233 COVER, pump, locking
10b 17F262 COVER, wire
10c 128551 CABLE, PC, jumper
11
20A336 SWITCH, ON/OFF
11a
O-RING, power switch
11b
NUT, power switch
12
115478 SCREW, mach, Torx, pan hd
15
20A542 KIT, control, includes 52
16
117501 SCREW, drill, HWH
18
115498 SCREW, mach, slot, hex
whd
20
25U282 FRAME, direct immersion
23
15G857 CAP, leg
25
15G838 CUP, suction/drain
27
112798 SCREW, thread
28
16D576 LABEL, made in USA
30
247340 HOSE, cpld, 1/4 in. x 50 ft
31
17J910 GUN, spray
34
128795 SCREW, hwh, thread
forming
41
17J444 STRAP, carry (not shown)
42
17J277 TRAY, drip
44
17J618 SHIELD, paint
45
245856 KIT, gauge, pressure
46
244035 DEFLECTOR, barbed
47
237686 WIRE, ground, assembly
48
115477 SCREW, mach, torx, pan hd.
49
20A387 SHIELD, battery
52
119236 SCREW, mach
53
20A052 SPRING, pin, assembly
55
LABEL, identification
56 20A480 LABEL, warning
CARD, medical alert (not
57
shown)
222385 EN, ES, FR
58
20A163 BATTERY, DEWALT, 54V,
EMEA, (not shown)
3A8429A
Qty.
1
1
1
1
1
1
2
1
1
1
1
1
2
1
1
1
1
1
1
1
4
1
1
1
Ref. Part
Description
59
20A166
69
70
71
75
20A529
20A530
20A531
115648
76
246187
CHARGER, fast, DEWALT,
54V, EMEA (not shown)
LABEL, front
LABEL, left
LABEL, right
VALVE, shut off, Powerflush
(not shown)
FITTING, garden hose,
Europe (not shown)
LABEL, A+
ADAPTER, ground, outlet
ADAPTER, plug, grounded,
CEE/7
ADAPTER, plug, grounded,
UK, model 25T973 (not
shown)
ADAPTER, UK power,
model 25T973 (not shown)
93
17P925
100 25U295
101 16H592
110 16H593
111 124507
Qty.
1
1
1
1
1
1
1
1
1
1
1
Replacement safety labels, tags, and cards are
available at no cost.
1
2
1
1
1
1
4
1
1
1
1
1
1
8
1
5
1
1
1
1
1
1
41
Pump Assembly
Pump Assembly
Ref.
42
Torque
Ref.
Torque
1
140-160 in-lb (16 - 18 N•m)
4
220-250 in-lb (25 - 28 N•m)
2
270-330 in-lb (30 - 37 N•m)
5
320-380 in-lb (36 - 43 N•m)
3
30-35 ft-lb (40 - 48 N•m)
6
180-220 in-lb (20 - 25 N•m)
3A8429A
Pump Assembly
Pump Assembly Parts List
ipres
Ref. Part
Description
1
2
3
4
5
6
17G447
17D364
128336
105445
117501
17J876
6a
7
124582
17J878
7a
7b
8
16P303
17K420
17J925
10
11
15Y185
111600
12
288747
13
14
120776
24Y327
15
17J880
16
21
25
128323
16D531
24Y472
28
20A567
28a
28b
28c
29
20A474
20A475
106555
17F227
30
42
43
17J882
122486
17K219
HOUSING, pump
GUIDE, ball
SPRING, compression
BALL, 0.5 in.
SCREW, mach, slot HWH
KIT, inlet housing, includes
2, 3, 4, 6a
PACKING, O-ring
KIT, PushPrime, includes
7a, 7b
PACKING, O-ring
LABEL, PushPrime
KIT, valve, drain, includes
9, 10, 11
HANDLE, valve, drain
PIN, grooved Models
17H211, 17H214
KIT, filter (Not installed on
all models.)
PACKING, O-ring
KIT, repair outlet, includes
12, 13
KIT, outlet valve repair
includes 42
SPRING, valve
PACKING, O-ring
KIT, repair, piston pump,
includes 16, 21
KIT, pressure control,
includes 5, 28a, 28b, 28c,
29, 30
LABEL, control
LABEL, control
O-ring
BRACKET, electrical
connector
KIT, shield, wire
PACKING, O-ring
MODULE, assembly,
pressure gauge
3A8429A
Qty.
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
43
Wiring Diagrams
Wiring Diagrams
44
3A8429A
Technical Specifications
Technical Specifications
GX 21 Cordless Sprayer
US
Sprayer
Maximum fluid working pressure
Maximum Delivery
Maximum Tip Size
Fluid Outlet npsm
Power Requirements
Dimensions
Height
Length
Width
Weight (with battery)
Storage temperature range 
Operating temperature range 
Noise**
Sound pressure
Sound power
Materials of Construction
Wetted materials on all models
Metric
3000 psi
207 bar, 20.7 MPa
0.47 gpm
1.8 lpm
0.021 in.
0.053 mm
1/4 in.
1/4 in.
See Models, page 3, for power requirements.
22 in.
18.4 in.
12 in.
28.5 lb. (31 lb.)
55.9 cm
46.7 cm
30.5 cm
12.9 kg (14.1 kg)
–30° to 160°F
–35° to 71°C
40° to 115°F
4° to 46°C
83 dBa*
93 dBa*
stainless steel, brass, leather, ultra-high molecular weight
polyethylene (UHMWPE), carbide, nylon, aluminum, PVC,
polypropylene, fluoroelastomer
Notes
* Startup pressures and displacement per cycle may vary based on suction condition,
discharge head, air pressure, and fluid type.
** Sound pressure measured 3 feet (1 meter) from equipment. Sound power measured per
ISO-9614.
 When pump is stored with non-freezing fluid. Pump damage will occur if water or latex
paint freezes in pump.
 Damage to plastic parts may result if impact occurs in low temperature conditions.
 Changes in paint viscosity at very low or very high temperatures can affect sprayer
performance.
3A8429A
45
California Proposition 65
California Proposition 65
CALIFORNIA RESIDENTS
WARNING: Cancer and reproductive harm –
www.P65warnings.ca.gov.
46
3A8429A
Graco Standard Warranty
Graco Standard 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.
FOR GRACO CANADA CUSTOMERS
The Parties acknowledge that they have required that the present document, as well as all documents,
notices and legal proceedings entered into, given or instituted pursuant hereto or relating directly or
indirectly hereto, be drawn up in English. Les parties reconnaissent avoir convenu que la rédaction du
présente document sera en Anglais, ainsi que tous documents, avis et procédures judiciaires exécutés,
donnés ou intentés, à la suite de ou en rapport, directement ou indirectement, avec les procédures
concernées.
3A8429A
47
Graco Information
For the latest information about Graco products, visit www.graco.com.
For patent information, see www.graco.com/patents.
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 reserves the right to make changes at any time without notice.
Original instructions. This manual contains English. MM 3A8429
Graco Headquarters: Minneapolis
International Offices: Belgium, China, Japan, Korea
GRACO INC. AND SUBSIDIARIES • P.O. BOX 1441 • MINNEAPOLIS MN 55440-1441 • USA
Copyright 2021, Graco Inc. All Graco manufacturing locations are registered to ISO 9001.
www.graco.com
Revision A, May 2021

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