Graco magnum pro plus a20, magnum pro plus a45, magnum pro plus a60, magnum plus a20, magnum pro plus a30 Repair Manual
Repair
Magnum Plus A20, Pro Plus A20, Pro Plus A30,
Pro Plus A45, and Pro Plus A60 Airless Sprayer
- For portable spray applications of architectural paints and coatings -
Models 16W108, 16E664, 16E665, 16W515, 17C243, 17C244, 17C245, 17C246
IMPORTANT SAFETY INSTRUCTIONS
Read all warnings and instructions in this manual.
Save these instructions.
See page 3 for model series information including
dispense rate, recommended hose length, guns, and
maximum working pressure.
A20, A30, and A45 ONLY: Use water-based or mineral spirit-type materials only. Do not use materials having flash points lower than 100° F (38° C). This
includes, but is not limited to, acetone, xylene, toluene,
or naptha. For more information about your material,
request MSDS from distributor or retailer.
332697C
EN
ti22045a
Pro Plus A20
Model: 16W108
Series A
Plus A20
Model: 17C243
Series A
Pro Plus A30
Model: 16E664
Series A and B
Model: 17C244
Series A
ti22084a
ti22085a
Pro Plus A45
Model: 16E665
Series A and B
Model: 17C245
Series A
ti22086a
Pro Plus A60
Model: 16W515
Series A
Model: 17C246
Series A
Table of Contents
Table of Contents
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Component Identification A20 and A30 . . . . . . . . . 8
Component Identification A45 and A60 . . . . . . . . 10
Grounding and Electrical Requirements . . . . . . . 12
Thermal Overload . . . . . . . . . . . . . . . . . . . . . . . 12
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Trigger Lock . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Pressure Relief Procedure . . . . . . . . . . . . . . . . 13
General Repair Information . . . . . . . . . . . . . . . . . 14
Basic Troubleshooting . . . . . . . . . . . . . . . . . . . . . 15
Advanced Troubleshooting . . . . . . . . . . . . . . . . . 20
Motor Does Not Operate . . . . . . . . . . . . . . . . . . 20
Circuit Breaker is Tripping . . . . . . . . . . . . . . . . . 23
Erratic Motor Operation . . . . . . . . . . . . . . . . . . . 24
Low or Fluctuating Output . . . . . . . . . . . . . . . . . 25
Excessive Pressure Build Up . . . . . . . . . . . . . . 26
Motor Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . 27
A20, A30, and A45 . . . . . . . . . . . . . . . . . . . . . . 27
A60 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Pressure Control Switch Diagnostics . . . . . . . . . 28
Pump Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . 28
Control Board Diagnostics . . . . . . . . . . . . . . . . . . 29
List of Kits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Graco Standard Warranty . . . . . . . . . . . . . . . . . . . 60
2 332697C
Specifications
Specifications
This equipment is not intended for use with flammable or combustible materials used in places such as cabinet
shops or other “factory”, or fixed locations. If you intend to use this equipment in this type of application, you must
comply with NFPA 33 and OSHA requirements for the use of flammable and combustible materials.
Model Name Series
A20 A
A30 A and B
A45 A and B
A60 A
Maximum
Dispense
Rate lpm
(gpm)
0.91 lpm
(0.24 gpm)
1.02 lpm
(0.27 gpm)
1.17 lpm
(0.31 gpm)
1.44 lpm
(0.38 gpm)
Hose Length and
Diameter
6.4 mm x 7.5 m
(1/4 in. x 25 ft)
6.4 mm x 7.5 m
(1/4 in. x 25 ft)
6.4 mm x 15 m
(1/4 in. x 50 ft)
6.4 mm x 15 m
(1/4 in. x 50 ft)
Maximum Working
Gun
Model
SG2 207 21 3000
SG3 207 21 3000
SG3 207 21 3000
SG3 207 21 3000
Pressure
bar MPa PSI
332697C 3
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.
WARNING
WARNINGWARNINGWARNING
GROUNDING
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.
•
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 under-
stood, 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 230V circuit and has a grounding plug similar to the plugs illustrated in the
figure below.
230V
• 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 grounding plug and a grounding 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
(2.5 mm
• An undersized cord results in a drop in line voltage and loss of power and overheating.
4 332697C
) minimum to carry the current that the product draws.
Warnings
WARNING
WARNINGWARNINGWARNING
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. For A20, A30, and A45 models: only use
water-based or mineral spirit-type materials with a flash point greater than 100° F (38° C).
• Do not spray 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. Do not
use pail liners unless they are antistatic or conductive.
• 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 combustible materials are 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
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.
• 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.
• Check hoses and parts for signs of damage. Replace any damaged hoses or parts.
• This system is capable of producing 3000 psi. Use Graco replacement parts or accessories that are
rated a minimum of 3000 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.
332697C 5
Warnings
WARNING
WARNINGWARNINGWARNING
EQUIPMENT MISUSE HAZARD
Misuse can cause death or serious injury.
• Do not operate the unit when fatigued or under the influence of drugs or alcohol.
• Do not exceed the maximum working pressure or temperature rating of the lowest rated system
component. See Technical Data in all equipment manuals.
• Use fluids and solvents that are compatible with equipment wetted parts. See Technical Data in all
equipment manuals. Read fluid and solvent manufacturer’s warnings. For complete information
about your material, request MSDS from distributor or retailer.
• Do not leave the work area while equipment is energized or under pressure.
• Turn off all equipment and follow the Pressure Relief Procedure when equipment is not in use.
• Check equipment daily. Repair or replace worn or damaged parts immediately with genuine manufacturer’s replacement parts only.
• Do not alter or modify equipment. Alterations or modifications may void agency approvals and create safety hazards.
• Make sure all equipment is rated and approved for the environment in which you are using it.
• Use equipment only for its intended purpose. Call your distributor for information.
• Route hoses and cables away from traffic areas, sharp edges, moving parts, and hot surfaces.
• Do not kink or over bend hoses or use hoses to pull equipment.
• Keep children and animals away from work area.
• Comply with all applicable safety regulations.
ELECTRIC SHOCK HAZARD
This equipment must be grounded. Improper grounding, setup, or usage of the system can cause
electric shock.
• Turn off and disconnect power cord before servicing equipment.
• Connect only to grounded electrical outlets.
• Use only 3-wire extension cords.
• Ensure ground prongs are intact on power and extension cords.
• Do not expose to rain. Store indoors.
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.
• Many other fluids may contain chemicals that can react with aluminum. Contact your material supplier for compatibility.
BURN HAZARD
Equipment surfaces and fluid that is heated can become very hot during operation. To avoid severe
burns:
• Do not touch hot fluid or equipment.
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.
• Pressurized equipment can start without warning. Before checking, moving, or servicing equipment,
follow the Pressure Relief Procedure and disconnect all power sources.
6 332697C
Warnings
WARNING
WARNINGWARNINGWARNING
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 MSDSs 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. This protective equipment includes but is
not limited to:
• Protective eyewear, and hearing protection.
• Respirators, protective clothing, and gloves as recommended by the fluid and solvent manufacturer.
CALIFORNIA PROPOSITION 65
This product contains a chemical known to the State of California to cause cancer, birth defects or other
reproductive harm. Wash hands after handling.
332697C 7
Component Identification A20 and A30
Component Identification A20 and A30
A Airless spray gun Dispenses fluid.
B Power switch Turns sprayer ON and OFF.
C Pressure control knob Increases (clockwise) and decreases (counter-clockwise) fluid pressure in
pump, hose, and spray gun.
C1 Setting Indicator To select function, align symbol on pressure control knob with setting
indicator, page 13.
D Pump fluid outlet fitting Threaded connection for paint hose.
G Suction tube Draws fluid from paint pail into pump.
H Prime tube (with diffuser) Drains fluid in system during priming and pressure relief.
J Prime/Spray valve • PRIME position directs fluid to prime tube.
• SPRAY position directs pressurized fluid to paint hose.
• Automatically relieves system pressure in overpressure situations.
L Inlet screen Prevents debris from entering pump.
M Paint hose Transports high-pressure fluid from pump to spray gun.
N Handle Used to help transport sprayer.
Q Tip guard Reduces risk of fluid injection injury.
R Reversible spray tip • Atomizes fluid being sprayed, forms spray pattern and controls fluid flow
according to hole size.
• Reverse unclogs plugged tips without disassembly.
S Gun trigger safety lever
(page 13)
T Gun fluid inlet fitting Threaded connection for paint hose.
U Power Flush attachment Connects garden hose to suction tube for power flushing water-based fluids.
V Gun fluid filter Filters fluid entering spray gun to reduce tip clogs.
W Pail hanger
(A20 sprayer only)
X Power cord Supplies sprayer with electricity
Z Pump priming button
(A30 sprayer only)
AA Garden Hose Adapter Connects to Power Flush Attachment and garden hose.
Prevents accidental triggering of spray gun.
For transporting pail by its handle.
Manually taps inlet ball to loosen if stuck.
8 332697C
Component Identification A20 and A30 (A20 shown)
Z
W
Component Identification A20 and A30
J
N
A20 A30
B
X
R
H
S
V
G
Q
T
L
D
A
M
AA
U
C1
C
ti22057a
332697C 9
Component Identification A45 and A60
Component Identification A45 and A60
A Airless spray gun Dispenses fluid.
B Power switch Turns sprayer ON and OFF.
C Pressure control knob Increases (clockwise) and decreases (counter-clockwise) fluid pressure in
pump, hose, and spray gun.
C1 Setting Indicator To select function, align symbol on pressure control knob with setting
indicator, page 13.
D Pump fluid outlet fitting Threaded connection for paint hose.
E InstaClean™ fluid filter
(A60 Sprayer Only)
F Power-Piston™ Pump, (Not
shown. Behind Easy Access door)
(A60 Sprayer Only)
F1 Easy Access door
(A60 Sprayer Only)
G Suction tube Draws fluid from paint pail into pump.
H Prime tube (with diffuser) Drains fluid in system during priming and pressure relief.
J Prime/Spray valve • PRIME position directs fluid to prime tube.
K Ball Knocker
(A60 Sprayer Only)
L Inlet screen Prevents debris from entering pump.
M Paint hose Transports high-pressure fluid from pump to spray gun.
Q Tip guard Reduces risk of fluid injection injury.
R Reversible spray tip • Atomizes fluid being sprayed, forms spray pattern and controls fluid
S Gun trigger safety lever (page 13) Prevents accidental triggering of spray gun.
T Gun fluid inlet fitting Threaded connection for paint hose.
U Power Flush attachment Connects garden hose to suction tube for power flushing water-based
V Gun fluid filter Filters fluid entering spray gun to reduce tip clogs.
W Hose wrap Rack Stows paint hose.
X Pail hanger For transporting pail by its handle.
Y Power Cord Supplies sprayer with electricity.
Z Power Flush Adapter
(A60 Sprayer Only)
AA Pump Priming Button
(A45 sprayer only)
AB Garden Hose Adapter Connects to Power Flush Attachment and garden hose.
• Filters fluid coming out of pump to reduce tip plugging and improve
finish.
• Self cleans only during pressure relief.
Pumps and pressurizes fluid and delivers it to paint hose.
Easy Access door permits quick access to outlet valve. To remove door,
insert flat blade of screwdriver into slot on the bottom of the door
(as shown on page, 11).
• SPRAY position directs pressurized fluid to paint hose.
• Automatically relieves system pressure in overpressure situations.
Automatically taps the inlet ball when you turn the sprayer on.
flow according to hole size.
• Reverse unclogs plugged tips without disassembly.
fluids.
Adapts suction tube (G) to Power Flush attachment (U).
Manually taps inlet ball to loosen if stuck.
10 332697C
Component Identification A45 and A60 (A60 shown)
Component Identification A45 and A60
AA
W
ti22077a
ti22086a
ti9346a
B
J
K
F
F1
Y
H
C
G
ti9670a
L
Z
U
AB
X
R
A
C1
E
M
S
V
D
ti9669a
Q
ti22177a
332697C 11
T
ti22176a
Grounding and Electrical Requirements
Grounding and Electrical Requirements
Sprayer must be grounded. Grounding reduces the risk
of static and electric shock by providing an escape wire
for electrical current due to static build up or in the event
of a short circuit.
• The 240 VAC sprayers
require a 220-240 VAC,
50/60 Hz, 10A circuit with a
grounding receptacle.
• Never use an outlet that is
not grounded or an adapter.
• Do not use the sprayer if the electrical cord has a
damaged ground prong.
• Only use an extension cord with an undamaged
3-prong plug.
Recommended extension cords for use with this
sprayer:
• 15 m (49.2 ft) 1.0 mm
• 30 m (98.4 ft) 1.5 mm
• 50 m (164.0 ft) 2.5 mm
Spray gun: ground through connection to a properly
grounded fluid hose and pump.
NOTE: Smaller gauge or longer extension cords may
reduce sprayer performance.
ti11730a
2
2
2
Fluid supply container
Solvent pails used when flushing
Use only conductive metal pails, placed on a grounded
surface such as concrete. Do not place the pail on a
nonconductive surface, such as paper or cardboard,
which interrupts grounding continuity.
Grounding the metal pail
pail by clamping one end to pail and other end to ground
such as a water pipe.
Maintaining grounding continuity
relieving pressure hold metal part of the spray gun firmly
to the side of a grounded metal pail, then trigger the
gun.
: follow local code.
: follow local code.
: connect a ground wire to the
: when flushing or
ti9207a
Thermal Overload
Motor has a thermal overload switch to shut itself down
if overheated. If unit overheats, allow approximately 45
minutes for unit to cool. Once cool, switch will close and
unit will restart.
To reduce risk of injury from motor starting
unexpectedly when it cools, always turn power
switch OFF if motor shuts down.
12 332697C
Operation
Operation
See Operation manual for basic information on sprayer
setup, flushing, and storage.
Trigger Lock
Always engage the trigger lock when you stop spraying
to prevent the gun from being triggered accidentally by
hand or if dropped or bumped.
ti8908a
Trigger Locked
ti8909a
Trigger Unlocked
Pressure Relief Procedure
Follow this Pressure Relief Procedure whenever you
stop spraying and before cleaning, checking, servicing,
or transporting equipment.
2. Move Prime/Spray valve to PRIME to relieve pressure.
ti9346a
A20 Only
3. Hold gun firmly to side of pail. Trigger the gun to
relieve pressure.
ti9207a
4. Engage trigger lock.
ti13961a
1. Turn power switch OFF and unplug power cord.
ti2810a
Pressure Control Knob Settings
High Pressure
Spray
Low Pressure
Spray
ti8908a
NOTE: Leave Prime/Spray valve in the PRIME position
until you are ready to spray again.
If you suspect the spray tip or hose is clogged or that
pressure has not been fully relieved after following the
steps above, VERY SLOWLY loosen tip guard retaining
nut or hose end coupling to relieve pressure gradually,
then loosen completely. Clear hose or tip obstruction.
See Unclogging Spray Tip in the Operation manual.
Prime/
Clean
Rolling
ti5597a
NOTE: To select function, align symbol on pressure control knob with setting indicator on sprayer.
332697C 13
General Repair Information
General Repair Information
Flammable materials spilled on hot, bare, motor could
cause fire or explosion. To reduce risk of burns, fire or
explosion, do not operate sprayer with cover
removed.
• Keep all screws, nuts, washers, gaskets, and electrical fittings removed during repair procedures.
These parts usually are not provided with replacement kits.
• Test repairs after problems are corrected.
• If sprayer does not operate properly, review repair
procedure to verify you did it correctly. See Basic
Troubleshooting, page 15 and Advanced Troubleshooting, page 20.
• Overspray may build up in the air passages.
Remove any overspray and residue from air passages and openings in the enclosures whenever
you service sprayer.
• Do not operate the sprayer without the cover in
place. Replace if damaged. Covers direct cooling air
around motor to prevent overheating.
To reduce risk of serious injury, including electric shock:
• Do not touch moving or electric parts with fingers or
tools while testing repair.
• Unplug sprayer when power is not required for testing.
• Install all covers, gaskets, screws and washers
before you operate sprayer.
NOTICE
• Do not run sprayer dry for more than 30 seconds.
Doing so could damage pump packings.
• Protect the internal drive parts of this sprayer from
water. Openings in the cover allow for air cooling of
the mechanical parts and electronics inside. If water
gets in these openings, the sprayer could malfunction or be permanently damaged.
• Prevent pump corrosion and damage from freezing.
Never leave water or water-base paint in sprayer
when its not in use in cold weather. Freezing fluids
can seriously damage sprayer. Store sprayer with
Pump Armor to protect sprayer during storage.
14 332697C
Basic Troubleshooting
Basic Troubleshooting
Check everything in this Basic Troubleshooting table before you bring the sprayer to a Graco/MAGNUM authorized
service center.
Problem Cause Solution
Power switch is on and sprayer is
plugged in, but motor does not run,
and pump does not cycle.
Pressure is set at zero pressure. Turn pressure control knob clockwise
to increase pressure setting.
Motor or control is damaged. Take sprayer to Graco/M
authorized service center.
Electric outlet is not providing power. • Try a different outlet or plug in
something that you know is
working to test outlet.
• Reset building circuit breaker or
replace fuse.
Extension cord is damaged. Replace extension cord. Read
Grounding and Electrical Requirements, page 12.
Sprayer power cord is damaged. Check for broken insulation or wires.
Replace power cord if damaged.
Paint and/or water is frozen or hardened in pump.
Unplug sprayer from outlet. If frozen
do NOT try to start sprayer until it is
completely thawed or you may damage the motor, control board and/or
drivetrain.
Make sure power switch is OFF.
Place sprayer in a warm area for several hours. Then plug in power cord
and turn sprayer ON. Slowly increase
pressure setting to see if motor will
start.
AGNUM
If paint is hardened in sprayer, pump
packings, valves, drivetrain or pressure switch may need to be replaced.
Take sprayer to Graco/M
authorized service center.
332697C 15
AGNUM
Basic Troubleshooting
Problem Cause Solution
Pump does not prime. Prime/Spray Valve is in SPRAY posi-
tion.
Inlet screen is clogged or suction
tube is not immersed in fluid.
Pump was not primed with flushing
fluid.
Inlet valve check ball is stuck. Remove suction tube and place a
Inlet valve check ball or seat is dirty
or worn.
Outlet valve check ball is stuck or
worn.
Move Prime/Spray Valve to PRIME
position.
Clean debris off inlet screen and
make sure suction tube is immersed
in fluid.
Remove suction tube from paint.
Prime pump with water or solvent-based flushing fluid, see Opera-
tion manual.
pencil into the inlet section to dislodge the ball, press pump priming
button, or Power Flush sprayer. See
Operation manual.
A60: AutoPrime may need replace-
ment. Turn power switch ON and listen for “tap” in pump. If you do not
hear “tap”, AutoPrime is damaged.
Take sprayer to Graco/M
AGNUM
authorized service center.
Remove inlet fitting. Clean or replace
ball and seat.
A60: Insert screw driver in slot and
remove Easy-Access™ door, page
11. Unscrew outlet valve with a 3/4
in. socket. Remove and clean
assembly. Replace if worn.
A20, A30, and A45: Remove outlet
fitting and clean outlet check ball.
Replace if worn.
Suction tube is leaking. Tighten suction tube connection.
Inspect for cracks or vacuum leaks.
Pump does not prime with fluid. Remove suction tube from paint.
Prime pump with water or solvent-based flushing fluid.
Fluids are viscous or sticky. Some fluids may prime faster if the
Power Switch is momentarily turned
off so the pump can slow and stop.
Repeat several times if necessary.
16 332697C
Basic Troubleshooting
Problem Cause Solution
Pump cycles but does not build up
pressure.
Pump cycles, but paint only dribbles
or spurts when spray gun is triggered.
Pump is not primed. Prime pump.
Inlet screen is clogged. Clean debris off inlet screen and
make sure suction tube is immersed
in fluid.
Suction tube is not immersed in
paint.
Make sure suction tube is immersed
in paint.
Suction tube is leaking. Tighten suction tube connection.
Inspect for cracks or vacuum leaks. If
cracked or damaged, replace suction
tube.
Prime/Spray Valve is worn or
obstructed with debris.
Take sprayer to Graco/M
authorized service center.
AGNUM
Pump check ball is stuck. Read Pump does not prime section
in Basic Troubleshooting, page 15.
Pressure is set too low. Slowly turn Pressure Control Knob
clockwise to increase pressure setting which will turn motor on to build
pressure.
Spray tip is clogged. Unclog spray tip, see Operation
manual.
InstaClean™ fluid filter is clogged. Clean or replace InstaClean™ fluid
filter, see Operation manual.
Spray gun fluid filter is clogged. Clean or replace gun fluid filter, see
Operation manual.
Spray tip is too large or worn. Replace tip.
332697C 17
Basic Troubleshooting
Problem Cause Solution
Pressure is set at maximum but cannot achieve a good spray pattern.
Reversible spray tip is in UNCLOG
position.
Rotate arrow-shaped handle on
spray tip so it points forward in
SPRAY position, see Operation
manual.
Spray tip is too large for sprayer. Select smaller spray tip.
Spray tip is worn beyond capability of
Replace spray tip.
sprayer.
Extension cord is too long or not
heavy enough gauge.
Replace extension cord. See
Grounding and Electrical Requirements, page 12.
Spray gun fluid filter is clogged. Clean or replace spray gun fluid filter,
see Operation manual.
InstaClean™ fluid filter is clogged. Clean or replace InstaClean™ fluid
filter, see Operation manual.
Inlet screen is clogged. Clean debris off inlet screen.
Pump valves are worn, or debris is
clogging valve.
Check for worn pump valves.
a. Prime sprayer with paint.
b. Trigger gun momentarily.
When trigger is released,
pump should cycle
momentarily and stop. If
pump continues to cycle,
pump valves may be worn.
c. Remove valves and check
for debris.
Material is too thick. Thin material.
Hose is too long (if extra section is
Remove section of hose.
added).
Spray gun stopped spraying. Suction tube is leaking. Tighten suction tube connection.
Inspect for cracks or vacuum leaks.
Spray tip is clogged. Unclog spray tip, see Operation
manual.
When paint is sprayed, it runs down
the wall or sags.
Coat is going on too thick. Move gun faster.
Choose a tip with smaller hole size.
Choose tip with wider fan.
Make sure gun is far enough from
surface.
When paint is sprayed, coverage is
inadequate.
Coat is going on too thin. Move gun slower.
Choose tip with larger hole size.
Choose tip with narrower fan.
Make sure gun is close enough to
surface.
18 332697C
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