DeWalt DXCMTA5090412 User manual

DXCMTA5090412
Gas Portable Air Compressor
Gaz de compresseur portatif
Gas de compresor portátil
INSTRUCTION MANUAL
GUIDE D'UTILISATION
MANUAL DE INSTRUCCIONES
INSTRUCTIVO DE OPERACIÓN, CENTROS DE SERVICIO Y PÓLIZA
DE GARANTÍA. ADVERTENCIA: LÉASE ESTE INSTRUCTIVO ANTES
DE USAR EL PRODUCTO.
If you have questions or comments, contact us.
Pour toute question ou tout commentaire, nous contacter.
Si tiene dudas o comentarios, contáctenos.
1-888-895-4549 • www.dewalt.com
MAT Industries, LLC, Long Grove, IL 60047
(SEPT16) Part No. 200-3048-B DXCMTA5090412 Copyright ©2016 DEWALT

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English
Air Compressor
A. Pump Air Intake Filter
B. Engine Air Filter
C. Engine On/Off Switch
D. Air Tank Pressure Gauge
E. Regulated Pressure Gauge
F. Pressure Regulator
G. Air Outlet
H. Unloader Valve
I. Safety Valve
J. Air Tank Drain Valve(s)
K. Fixed Throttle
L. Choke Control
M. Fuel Valve Lever
N. Starter Grip
Pump Specications
Oil-Free
Single stage
Direct Drive
Engine Specications
Subaru 169 cc
Internal Combustion
4-stroke
Specications
B
A
J (2x)
D
E
F
G
K
H
CI
FIG. 1
Actual unit may vary slightly.
L
N
M

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MODEL DXCMTA5090412
WEIGHT 74 lbs. (33.6 kg)
HEIGHT 20" (508 mm)
WIDTH 21.5" (546.1 mm)
LENGTH 24.5" (622.3 mm)
AIR TANK CAPACITY 4 gallons (15.1 liters)
APPROX. BLOW OFF PRESSURE 155 psi
SCFM @ 90 PSI 5.0 *
* Tested per ISO 1217
Hot Surfaces
Denitions: Safety Guidelines
The definitions below describe the level of severity
for each signal word. Please read the manual and pay
attention to these symbols.
DANGER: Indicates an imminently hazardous situation
which, if not avoided, will result in death or serious injury.
WARNING: Indicates a potentially hazardous
situation which, if not avoided, could result in death or
serious injury.
CAUTION: Indicates a potentially hazardous
situation which, if not avoided, may result in minor or
moderate injury.
NOTICE: Indicates a practice not related to personal injury
which, if not avoided, may result in property damage.
IF YOU HAVE ANY QUESTIONS OR COMMENTS ABOUT
THIS OR ANY D e WALT TOOL, CALL US TOLL FREE AT:
1-888-895-4549
Important Safety Instructions
DANGER: Carbon Monoxide. Using an engine indoors can
kill you in minutes. Engine exhaust contains high levels of
carbon monoxide (CO), a poisonous gas you cannot see or
smell. You may be breathing CO even if you DO NOT smell
engine exhaust.
OUTLET TUBE
ENGINE
MUFFLER GASOLINE
ENGINE
FIG. 2

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• NEVER use an engine inside homes, garages, crawlspaces,
or other partly enclosed areas. Deadly levels of carbon mon-
oxide can build up in these areas. Using a fan or opening
windows and doors does NOT supply enough fresh air.
• ONLY use outdoors and far away from open windows, doors
and vents. These openings can pull in engine exhaust.
• Even when the engine is used correctly, CO may leak into
your home. ALWAYS use a battery-powered or battery
backup CO alarm (not supplied) in the home. Read and fol-
low all directions for CO alarm before using. If you start to
feel sick, dizzy or weak at anytime, move to fresh air imme-
diately. See a doctor. You could have carbon monoxide
poisoning.
WARNING: Do not operate this unit until you read this
instruction manual and the engine instruction manual for safety,
operation and maintenance instructions.
WARNING: This product may not be equipped with a spark-
arresting muffler. If the product is not equipped and will be used
around flammable materialsor on landcovered with materialssuch
as agricultural crops, forest, brush, grass or other similar items,
then an approved spark arrester must be installed and is legally
requiredinthestateofCalifornia.ItisaviolationofCaliforniastatutes
section 130050 and/or sections 4442 and 4443 of the California
Public Resources Code, unless the engine is equipped with a spark
arrester, as defined in section 4442, and maintained in effective
working order. Spark arresters are also required on some U.S.
Forest Service land and may also be legally required under other
statutes and ordinances.
WARNING: This product contains chemicals known to the
State of California to cause cancer, and birth defects or other
reproductive harm. Wash hands after handling.
WARNING: Some dust contains chemicals known to the State
of California to cause cancer, birth defects or other reproductive
harm such as asbestos and lead in lead based paint.
WARNING: The engine exhaust from this product contains
chemicals known to the State of California to cause cancer, birth
defects or other reproductive harm.
SAVE THESE INSTRUCTIONS
DANGER: RISK OF EXPLOSION OR FIRE
WHAT CAN HAPPEN HOW TO PREVENT IT
 • Spilledgasolineandit’s
vapors can become ignited
from cigarette sparks, elec-
trical arcing, exhaust gases
and hot engine components
such as the muffler.
 • Shutoffengineandallowitto
cool before adding fuel to the
tank.
 • Usecareinfillingtanktoavoid
spilling fuel. Move unit away
from fueling area before start-
ing engine.
 • Heatwillexpandfuelinthe
tank which could result in
spillage and possible fire or
explosion.
 • Keepmaximumfuellevel
1/2" (12.7 mm) below
bottom of filler neck
to allow for expansion.

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 • Combustiblematerials
which come into contact
with hot engine parts can
become ignited.
 • Addfueloutdoorsinawell
ventilated area. Make sure
there are no sources of igni-
tion, such as cigarettes near
refueling location.
 • Operatecompressorina
clean, dry, well ventilated area
a minimum of 48" (1.22 m)
from any building, object
or wall. Do not operate unit
indoors or in any confined
area.
 • Operatecompressorinan
open area away from dry
brush, weeds or other com-
bustible materials.
 • Improperlystoredfuelcould
lead to accidental ignition.
Fuel improperly secured
could get into the hands of
children or other unqualified
persons.
 • StorefuelinanOSHA-ap-
proved container, in a secure
location away from work area.
• Unattendedoperationof
this product could result in
personal injury or property
damage. To reduce the
risk of fire, do not allow
the compressor to operate
unattended.
• Alwaysremaininattendance
with the product when it is
operating.
DANGER: RISK TO BREATHING (ASPHYXIATION)
WHAT CAN HAPPEN HOW TO PREVENT IT
 • Breathingexhaustfumes
will cause serious injury
or death! Engine exhaust
contains carbon monoxide,
an odorless and deadly gas.
• Alwaysoperateaircompressor
outside in a clean, well
ventilated area. Avoid enclosed
areas such as garages,
basements, storage sheds,
which lack a steady exchange
or air. Keep children, pets
and others away from area of
operation.
• Thecompressedairdirectly
from your compressor is not
safe for breathing. The air
stream may contain carbon
monoxide, toxic vapors,
or solid particles from the
air tank. Breathing these
contaminants can cause
serious injury or death.
• Neveruseairobtaineddirectly
from the compressor to supply
air for human consumption.
The compressor is not
equipped with suitable filters
and in-line safety equipment
for human consumption.

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• Exposuretochemicals
in dust created by
power sanding, sawing,
grinding, drilling and other
construction activities may
be harmful.
• Sprayedmaterialssuchas
paint, paint solvents, paint
remover, insecticides, weed
killers, may contain harmful
vapors and poisons.
• Workinanareawithgood
cross ventilation. Read and
follow the safety instructions
provided on the label or
safety data sheets for the
materials you are spraying.
Always use certified safety
equipment: NIOSH/OSHA
respiratory protection or
properly fitting face mask
designed for use with your
specific application.
WARNING: RISK OF BURSTING
Air Tank: On February 26, 2002, the U.S. Consumer Product
Safety Commission published Release # 02-108 concerning air
compressor tank safety:
Air compressor receiver tanks do not have an infinite life. Tank life
is dependent upon several factors, some of which include oper-
ating conditions, ambient conditions, proper installations, field
modifications, and the level of maintenance. The exact effect of
these factors on air receiver life is difficult to predict.
If proper maintenance procedures are not followed, internal corro-
sion to the inner wall of the air receiver tank can cause the air tank
to unexpectedly rupture allowing pressurized air to suddenly and
forcefully escape, posing risk of injury to consumers.
Your compressor air tank must be removed from service by the
end of the year shown on your tank warning label.
The following conditions could lead to a weakening of the air tank,
and result in a violent air tank explosion:
WHAT CAN HAPPEN HOW TO PREVENT IT
• Failuretoproperlydrain
condensed water from
air tank, causing rust and
thinning of the steel air tank.
• Drainairtankdailyoraftereach
use. If air tank develops a leak,
replace it immediately with
a new air tank or replace the
entire compressor.
• Modificationsorattempted
repairs to the air tank. • Neverdrillinto,weldormake any modifications to the air
tank or its attachments. Never
attempt to repair a damaged or
leaking air tank. Replace with a
new air tank.
• Unauthorizedmodifications
to the unloader valve,
safety valve, or any other
components which control air
tank pressure.
• Theairtankisdesigned
to withstand specific
operating pressures. Never
make adjustments or parts
substitutions to alter the factory
set operating pressures.
Attachments & accessories:
• Exceedingthepressurerating
of air tools, spray guns, air
operated accessories, tires
and other inflatables can
cause them to explode or
fly apart, and could result in
serious injury.
• Followtheequipment
manufacturers
recommendation and never
exceed the maximum allowable
pressure rating of attachments.
Never use compressor to
inflate small low pressure
objectssuchaschildren’stoys,
footballs, basketballs, etc.

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Tires:
• Over inflation of tires could
result in serious injury and
property damage.
 • Useatirepressuregaugeto
check the tires pressure before
each use and while inflating
tires; see the tire sidewall for
the correct tire pressure.
NOTE: Air tanks, compressors
and similar equipment used to
inflate tires can fill small tires
very rapidly. Adjust pressure
regulator on air supply to no
more than the rating of the tire
pressure. Add air in small incre-
ments and frequently use the
tire gauge to prevent over infla-
tion.
WARNING: RISK FROM FLYING OBJECTS
WHAT CAN HAPPEN HOW TO PREVENT IT
• Thecompressedairstream
can cause soft tissue damage
to exposed skin and can
propel dirt, chips, loose
particles and small objects
at high speed, resulting in
property damage or personal
injury.
• Always wear certified safety
equipment: ANSI Z87.1 eye
protection (CAN/CSA Z94.3)
with side shields when using
the compressor.
• Neverpointanynozzleor
sprayer toward any part of
the body or at other people or
animals.
• Alwaysturnthecompressor
off and bleed pressure from
the air hose and air tank before
attempting maintenance,
attaching tools or accessories.
WARNING: RISK OF HOT SURFACES
WHAT CAN HAPPEN HOW TO PREVENT IT
• Touchingexposedmetalsuch
as the engine head, engine
exhaust or outlet tubes, can
result in serious burns.
 • Nevertouchanyexposed
metal parts on compressor
during or immediately after
operation. Compressor will
remain hot for several minutes
after operation
 • Donotreacharound
protective shrouds or attempt
maintenance until unit has
been allowed to cool.

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WARNING: RISK FROM MOVING PARTS
WHAT CAN HAPPEN HOW TO PREVENT IT
• Theenginecanstart
accidentally if the flywheel is
turned by hand or moved by
pulling on the starter rope.
• Alwaysdisconnectthespark
plug and bleed pressure from
the air tank before performing
maintenance.
• Movingpartssuchasthe
pulley, flywheel, and belt can
cause serious injury if they
come into contact with you or
your clothing.
• Neveroperatethecompressor
with guards or covers which are
damaged or removed.
• Keepyourhair,clothingand
gloves away from moving parts.
Loose clothes, jewelry or long
hair can be caught in moving
parts.
• Airventsmaycovermoving
parts and should be avoided as
well.
• Attemptingtooperate
compressor with damaged or
missing parts or attempting
to repair compressor with
protective shrouds removed
can expose you to moving
parts and can result in serious
injury.
• Anyrepairsrequiredonthis
product should be performed
by a DeWALT factory service
center or a DeWALT authorized
service center.
WARNING: RISK OF UNSAFE OPERATION
WHAT CAN HAPPEN HOW TO PREVENT IT
• Unsafeoperationofyourair
compressor could lead to
serious injury or death to you
or others.
• Reviewandunderstandall
instructions and warnings in
this manual.
• Becomefamiliarwiththeoper-
ation and controls of the air
compressor.
• Keepoperatingareaclearofall
persons, pets, and obstacles.
• Keepchildrenawayfromtheair
compressor at all times.
• Donotoperatetheproduct
when fatigued or under the
influence of alcohol or drugs.
Stay alert at all times.
• Neverdefeatthesafetyfeatures
of this product.
• Equipareaofoperationwitha
fire extinguisher.
• Donotoperatemachinewith
missing, broken, or unautho-
rized parts.
• Neverstandonthe
compressor.

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WARNING: RISK FROM NOISE
WHAT CAN HAPPEN HOW TO PREVENT IT
 • Under some conditions and
duration of use, noise from
this product may contribute
to hearing loss.
 • Alwayswearcertifiedsafety
equipment: ANSI S12.6
(S3.19) hearing protection.
WARNING: RISK OF INJURY FROM LIFTING
WHAT CAN HAPPEN HOW TO PREVENT IT
 • Seriousinjurycanresultfrom
attempting to lift too heavy
an object.
 • Thecompressoristooheavy
to be lifted by one person.
Obtain assistance from others
before lifting.
WARNING: RISK OF INJURY OR PROP ER TY DAMAGE WHEN
TRANSPORTING OR STORING
WHAT CAN HAPPEN HOW TO PREVENT IT
• Oilcanleakorspillandcould
result in fire or breathing
hazard; serious injury or
death can result. Oil leaks will
damage carpet, paint or other
surfaces in vehicles or trailers.
• Alwaysplacecompressor
on a protective mat when
transporting to protect against
damage to vehicle from leaks.
Remove compressor from
vehicle immediately upon
arrival at your destination.
Always keep compressor level
and never lie on its side.
SAVE THESE INSTRUCTIONS
FOR FUTURE USE

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FEATURES
UNLOADER VALVE
When the maximum air tank pressure is obtained, the unloader
valve (H) will blow-off. This will cause the compressor to exhaust
the air to the atmosphere and not the tank. The valve is preset by
the manufacturer and must not be removed or modified in any way.
Manual Lock: The manual lock allows you to manually unload the
compressor with air pressure in the air tank. To operate the manual
lock:
Rotate the manual lock unloader lever to the
OPEN
H
CLOSED
H
open position to prevent air tank pressure
buildup. Rotate manual lock unloader lever to
the closed position after starting the engine
to allow air tank pressure to build. NOTE: Air
will not build in tank when manual lock
unloader lever in the open position.
SAFETY VALVE
This valve (I) is designed to prevent system failures I
by relieving pressure from the system when the
compressed air reaches a predetermined level. The
valve is preset by the manufacturer and must not be
removed or modified in any way.
AIR INTAKE FILTER
The filter (A) is designed to clean air entering the pump.
A
To ensure the pump continually receives a clean, cool,
and dry air supply the filter must always be clean and
the filter intake must be free from obstructions.
AIR TANK DRAIN VALVES
The drain valve (J) is used to remove
J
moisture from the air tank after the air
compressor is shut off.
AIR TANK PRESSURE GAUGE
The air tank pressure gauge (D) indicates air pressure in the air tank.
REGULATED PRESSURE GAUGE
Theregulatedpressuregauge(E)indicatestheair ED
F
pressure available at the outlet side of the
regulator. This pressure is controlled by the
regulator and is always less or equal to the air
tank pressure.
REGULATOR
The regulator knob (F) controls the air pressure coming from the air
tank.
To Adjust Regulator:
1. Turn knob clockwise to increase regulated pressure and
counterclockwise to decrease regulated pressure.
WARNING: Risk of Bursting. Too much air pressure causes
a hazardous risk of bursting. Check the manufacturer’s
maximum pressure rating for air tools and accessories. The
regulator outlet pressure must never exceed the maximum
pressure rating.
THROTTLE CONTROL
When maximum air tank pressure is reached and the unloader
valve vents air, it activates the throttle control on the engine. This
gas saving feature holds the engine at a factory-set idling speed
until air pressure in the air tank drops to reset pressure. The
unloader valve then reactivates the throttle control and accelerates
the engine to full throttle.

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INSTALLATION
Assembly (Fig. 1)
INSTALLING HOSES
WARNING: Risk of unsafe operation. Firmly grasp hose in hand
when installing or disconnecting to prevent hose whip.
1. Ensure regulated pressure gauge reads 0 psi.
2. Apply sealant tape to hose threads.
3. Assemble hose to air outlet (G).
NOTICE: Do not assemble splitters directly to the air
outlet (G).
NOTE: Assembling quick connect bodies to air outlet (G) and quick
connect plugs to hose ends make connecting and disconnecting
hoses simple and easy. Quick connect bodies and plugs are
available for purchase from your local dealer or authorized service
center.
DISCONNECTING HOSES
WARNING: Risk of unsafe operation. Firmly grasp hose in hand
when installing or disconnecting to prevent hose whip.
1. Ensure regulated pressure gauge reads 0 psi.
2. Remove hose(s) from air outlet(s) (G).
Lubrication and Oil
ENGINE
1. The engine was filled WITH oil at the manufacturer. Check
engine oil level before operating unit. If necessary, fill engine
to the appropriate level with recommended oil, see engine's
instruction manual supplied by engine manufacturer for correct
procedure.
2. Add fuel to engine. See engine's instruction manual supplied by
engine manufacturer for correct procedure.
WARNING: Risk of explosion or fire. Gasoline vapor is highly
flammable. Refuel outdoors preferably, or only in well-ventilated
areas. Do not refuel or check gasoline level while the engine is
running. Do not store, spill, or use gasoline near an open flame,
a source of sparks (such as welding), or near operating electrical
equipment.
Compatibility
Air tools and accessories that are run off the compressor must be
compatible with petroleum based products. If you suspect that a
material is not compatible with petroleum products, an air line filter
for removal of moisture and oil vapor in compressed air is required.
NOTICE: Always use an air line filter to remove moisture and oil
vapor when spraying paint.
Location
DANGER: Risk of breathing. Exhaust from the gasoline engine
contains deadly carbon monoxide, which is odorless and toxic.
Operate engine only in well ventilated areas.
NOTICE: Risk of property damage. In order to avoid damaging
the air compressor, do not allow the unit to be tilted more than
10º when operating.
Place air compressor at least 4 feet (1.2 m) away from obstacles
that may prevent proper ventilation. Keep unit away from areas
that have dirt, vapor and volatile fumes in the atmosphere which
may clog and gum up the intake filter and valves, causing inefficient
operation.
NOISE CONSIDERATIONS
Consult local officials for information regarding acceptable noise

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levels in your area. To reduce excessive noise, use vibration mounts
or silencers, relocate the unit or baffle walls. Contact a D e WALT
service center or call 1-888-895-4549 for assistance.
TRANSPORTING
WARNING: Risk injury from lifting. Unit weighs more than 70
lbs. (77.6 kg) Do not move or lift without assistance.
NOTICE: Risk of property damage. Place engine fuel valve lever
(M) in the OFF position before moving or transporting unit.
When transporting the compressor in a vehicle, trailer, etc. ensure
that the air tank is drained and the unit is secured and placed on
a protective mat on a flat horizontal surface. DO NOT store in a
standing position.
NOTE: Should the unit tip over, hard starting and smoking will occur
due to oil spillage.
PREPARATION FOR USE
Pre-Start Checklist (Fig. 1)
1. Ensure engine ON/OFF switch (C) is in the OFF position.
2. Ensure air tank is drained, see Draining Air Tank under
Maintenance.
3. Ensure the drain valve (J) is closed.
4. Ensure safety valve (I) is functioning properly, see Checking
Safety Valve under Maintenance.
NOTICE: Do not operate without oil or with inadequate oil. DeWALT
is not responsible for compressor failure caused by inadequate oil.
5. Check engine's oil and fuel level, see engine's instruction manual
for correct procedures.
6. Ensure all guards, covers, and labels are in place, legible (for
labels) and securely mounted. Do not use compressor until all
items have been verified.
Initial Set-up (Fig. 1)
WARNING: Do not operate this unit until you read and
understand this instruction manual and the engine instruction
manual for safety, operation and maintenance instructions.
BREAK-IN PROCEDURE
NOTICE: Risk of property damage. Serious damage may result if
the following break-in instructions are not closely followed.
This procedure is required:
 • Beforetheaircompressorisusedforthefirsttime.
 • Whentheunloadervalvehasbeenreplaced.
The procedure:
1. Follow Pre-Start Checklist under Preparation for Use.
2. Rotate the unloader's manual lock to the open position to
prevent air tank pressure buildup.
3. Open the pressure regulator. Rotate clockwise until it stops.
WARNING: Do not operate this unit until you read and under-
stand the engine instruction's manual for safety, operation and
maintenance instructions.
4. Prepare engine for first time use, see engine's instruction manual
for correct procedure.
5. Turn the engine ON/OFF switch (C)
OPEN
CLOSED
L
MOFF
ON
to the ON position.
6. Place the fuel valve lever (M) in the
ON postion.
7. If the engine is cold, move the
choke (L) to the CLOSED position
as shown. If the engine is hot, move
the choke to the OPEN position.
WARNING: Risk of unsafe operation. Pull starter grip slowly
until resistance is felt. Then pull starter grip (N) rapidly to avoid

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kickback and prevent hand or arm injury.
NOTICE: Do not allow the starter grip to snap back. Return it gently
by hand.
NOTE: If the engine does not start, check the oil level and add oil
as needed.
NOTE: To ensure maximum oil lubrication, place the unit on a level
surface.
8. As the engine warms up, move the choke to the OPEN position.
9. Rotate the manual lock on the unloader valve into the closed
position so the air tank pressure can build.
10. Close the pressure regulator. Rotate the regulator knob (F)
counterclockwise to its built-in stop. This will allow air to build
pressure in the air tank.
11. Compressed air will be available from the hose air outlet until it
is used up or bled off.
OPERATING PROCEDURES
Start-up (Fig. 1)
1. Follow Pre-Start Checklist under Preparation for Use.
2. Turn the regulator knob (F) counterclockwise until fully closed.
Regulated pressure gauge should read 0 psi.
3. Rotate the manual lock unloader lever to the open position to
assist with start up.
4. Turn the engine ON/OFF switch (C) to the ON position.
5. Place the fuel valve lever (M) in the ON postion.
6. If the engine is cold, move the choke (L) to the CLOSED
position as shown. If the engine is hot, move the choke to the
OPEN position.
WARNING: Risk of unsafe operation. Pull starter grip slowly
until resistance is felt. Then pull starter grip (N) rapidly to avoid
kickback and prevent hand or arm injury.
NOTICE: Do not allow the starter grip to snap back. Return it gently
by hand.
NOTE: If the engine does not start, check the oil level and add oil
as needed.
NOTE: To ensure maximum oil lubrication, place the unit on a level
surface.
7. As the engine warms up, move the choke to the OPEN position.
8. Rotate manual lock unloader lever to the closed position to allow
air tank pressure to build. NOTE: Pump will not operate with the
manual lock unloader lever in the open position.
9. Allow compressor to pump up to blow off pressure.
WARNING: Risk of unsafe operation. If any unusual noise
or vibration is noticed, stop the compressor and refer to the
troubleshooting section.
10. Attach hose and accessory.
WARNING: Risk of unsafe operation. Firmly grasp air hose in
hand when installing or disconnecting to prevent hose whip.
WARNING: Risk of unsafe operation. Do not use damaged or
worn accessories.
NOTICE: Risk of property damages. Compressed air from the unit
may contain water condensation and oil mist. Do not spray unfil-
tered air at an item that could be damaged by moisture. Some air
operated tools or devices may require filtered air. Read the instruc-
tions for the air tool or device.
11. Adjust regulator (F) to desired setting. See Regulator under
Features.
Shut-down
1. Place the engine ON/OFF switch (C) to the OFF Position.
2. Place the fuel valve lever (M) in the OFF postion.
NOTE: If finished using compressor, follow Steps 3–7.

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3. Turn regulator knob (F) counterclockwise until fully closed. Ensure
regulated pressure gauge reads 0 psi.
4. Remove hose and accessory.
5. Drain the air tank. See Draining Air Tank under Maintenance .
NOTICE: Risk of property damage. Place engine fuel valve lever
(M) in the OFF position before moving or transporting unit.
WARNING: Risk of bursting. Drain air tank daily. Water will
condense in air tank. If not drained, water will corrode and weaken
the air tank causing a risk of air tank rupture.
6. Allow the compressor to cool down.
7. Wipe air compressor clean and store in a safe, non freezing area.
MAINTENANCE
WARNING:The following procedures must be followed when
maintenance or service is performed on the air compressor.
1. Ensure engine ON/OFF switch (C) is in the OFF position.
2. Disconnect spark plug wire.
3. Drain air tank.
4. Allow air compressor to cool down before starting service
NOTE: All compressed air systems contain maintenance parts (e.g.
oil, filters, separators) that are periodically replaced. These used parts
may contain substances that are regulated and must be disposed of
in accordance with local, state, and federal laws and regulations.
NOTE: Take note of the positions and locations of parts during
disassembly to make reassembly easier.
NOTE: Any service operations not included in this section should
be performed by a DeWALT factory service center or a DeWALT
authorized service center.
Maintenance Chart
Procedure
Daily
Weekly
Monthly
1 year or
200 Hours
See tank
warning
label
Check safety valve
X
Inspect air filter
X
+
Drain air tank
X
Oil leak inspection
X
Check for unusual noise/vibration
X
Check for air leaks
X *
Clean compressor exterior
X
Remove tank from service
X++
Engine See engine instruction manual.
* To check for air leaks apply a solution of soapy water around
joints. While compressor is pumping to pressure and after
pressure cuts out, look for air bubbles to form.
+ Perform more frequent in dusty or humid conditions.
++ For more information, call 1-888-895-4549
Checking Safety Valve (Fig. 1)
WARNING: Hot surfaces. Risk of burn. Pump head, and
surrounding parts are very hot, do not touch (see the Hot
Surfaces identified in Fig. 2). Allow compressor to cool prior
to servicing.
WARNING: Risk of bursting. If the safety valve does not work
properly, over-pressurization may occur, causing air tank rupture
or an explosion.
WARNING: Risk from flying objects. Always wear certified safety

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equipment: ANSI Z87.1 eye protection (CAN/CSA Z94.3) with side
shields when using the compressor.
Before starting compressor, pull the ring on the safety valve to
make sure that the safety valve operates freely. If the valve is stuck
or does not operate smoothly, it must be replaced with the same
type of valve.
Checking Air Filter Element (Fig. 1)
WARNING: Hot surfaces. Risk of burn. pump head, and
surrounding parts are very hot, do not touch (see the Hot Surfaces
identified in Fig. 2). Allow compressor to cool prior to servicing.
1. Ensure engine ON/OFF switch (C) is in the OFF position.
2. Allow unit to cool.
5. Remove filter (A).
6. If filter needs cleaning, blow out with air. Replace
A
if needed. Purchase replacement parts from
your local dealer or authorized service center.
Always use identical replacement parts.
7. Place filter back in filter base.
NOTICE: Risk of unsafe operation. Do not operate without air
inlet filter.
Draining Air Tank (Fig. 1)
WARNING: Risk of unsafe operation. Air tanks contain high
pressure air. Keep face and other body parts away from outlet
of drain. Use eye protection [ANSI Z87.1 (CAN/CSA Z94.3)] when
draining as debris can be kicked up into face.
WARNING: Risk from noise. Use ear protection (ANSI S12.6
(S3.19) as air flow noise is loud when draining.
NOTE: All compressed air systems generate condensation that accu-
mulates in any drain point (e.g., tanks, filter, aftercoolers, dryers). This
condensate contains lubricating oil and/or substances which may be
regulated and must be disposed of in accordance with local, state,
and federal laws and regulations.
1. Ensure engine ON/OFF switch (C) is in the OFF position.
2. Turn the regulator counterclockwise to set the outlet pressure to
zero.
3. Remove the air tool or accessory.
4. Pull ring on safety valve allowing air to bleed from the tank until
tank pressure is approximately 20 psi. Release safety valve ring.
5. Drain water from air tank by opening drain valve (counterclock-
wise) on bottom of tank.
WARNING: Risk of bursting. Water will condense in the air
tank. If not drained, water will corrode and weaken the air tank
causing a risk of air tank rupture.
NOTICE: Risk of property damage. Drain water from air tank may
contain oil and rust which can cause stains.
6. After the water has been drained, close the drain valve (clock-
wise). The air compressor can now be stored.
NOTE: If drain valve is plugged, release all air pressure. The valve
can then be removed, cleaned, then reinstalled.
NOTE: Tilt unit to drain tanks (B).
NOTE: In cold climates, drain the tanks after each use to
reduce problems with freezing of water condensation.

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B
ACCESSORIES
Recommended accessories for use with your tool are available for
purchase from your local dealer or authorized service center. If you
need assistance in locating any accessory for your tool, please call
1-888-895-4549 or visit our website www.dewalt.com.
WARNING: The use of any other accessory not recommended
for use with this tool could be hazardous. Use only accessories
rated equal to or higher than the rating of the air compressor.
SERVICE INFORMATION
Please have the following information available for all service calls:
Model Number ____________ Serial Number ___________
Date and Place of Purchase ____________________________
Repairs
To assure product SAFETY and RELIABILITY, repairs, maintenance
and adjustment should be performed by a D e WALT factory service
center, a D e WALT authorized service center or other qualified
service personnel. Always use identical replacement parts.
Limited Warranty
DEWALT Industrial Tools are warranted from date of purchase.
1 Year – Limited on all oil-free compressors. This warranty is
not transferable to subsequent owners.
DEWALTwillrepairorreplace,withoutcharge,atDEWALT’s
option, any defects due to faulty materials or workmanship.
For further detail of warranty coverage and warranty repair
information, call 1-(888)-895-4549 or visit dewalt.com. This
warranty does not apply to accessories or damage caused where
repairs have been made or attempted by others. This warranty
also does not apply to merchandise sold by DEWALT which has
been manufactured by and identied as the product of another
company,suchasgasolineengines.Suchmanufacturer’s
warranty, if any, will apply. ANY INCIDENTAL, INDIRECT OR
CONSEQUENTIAL LOSS, DAMAGE OR EXPENSE THAT MAY
RESULT FROM ANY DEFECT, FAILURE OR MALFUNCTION OF
THE PRODUCT IS NOT COVERED BY THIS WARRANTY. Some
states do not allow the exclusion of limitation of incidental or
consequential damages, so the above limitation or exclusion may
not apply to you. IMPLIED WARRANTIES, INCLUDING THOSE
OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR
PURPOSE, ARE LIMITED TO ONE YEAR FROM THE DATE OF
ORIGINAL PURCHASE. Some states do not allow limitations on
how long an implied warranty lasts, so the above limitations may
not apply to you.

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What the Company Will Do: (the company) will cover parts
and labor to remedy substantial defects due to materials
and workmanship during the rst year of ownership, with the
exceptions noted below. Parts used in repair of whole goods or
accessories are warranted for the balance of the original warranty
period.
What is not covered Under This Warranty? Failures by the
original retail purchaser to install, maintain, and operate said
equipment in accordance with standard industry practices.
Modications to the product, or tampering with components,
or failure to comply with the specic recommendations of the
Companysetforthintheowner’smanual,willrenderthiswarranty
null and void. The Company shall not be liable for any repairs,
replacements, or adjustments to the equipment, or any costs for
laborperformedbythepurchaserwithouttheCompany’sprior
written approval. The effects of corrosion, erosion, surrounding
environmental conditions, cosmetic defects, and routine
maintenance items, are specically excluded from this warranty.
Routine maintenance items such as: oil, lubricants, and air lters,
as well as changing oil, air lters, belt tensioning, etc… fall under
theowner’sresponsibility.Additionalexclusionsinclude:freight
damage, failures resulting from neglect, accident, or abuse,
induction motors when operated from a generator, oil leaks, air
leaks, oil consumption, leaky ttings, hoses, petcocks, bleeder
tubes, and transfer tubes.
 • Thefollowingcomponentsareconsiderednormalwear
items and are not covered after the rst year of
ownership: Belts, sheaves, ywheels, check valves,
pressure switches, air unloaders, throttle controls,
electric motors, brushes, regulators, o-rings, pressure
gauges, tubing, piping, ttings, fasteners, wheels, quick
couplers, gaskets, seals, air lter housings, piston rings,
connecting rods, and piston seals.
 • Labor,servicecalls,andtravelcharges,arenotcovered
after the rst year of ownership on stationary
compressors (compressors without handles, or wheels).
Repairs requiring overtime, weekend rates, or any other
charges beyond the standard shop labor rate are not
covered.
 • Timerequiredfororientationtrainingfortheservice
center to gain access to the product, or additional time
due to inadequate egress.
 • Damagecausedfrominadequateltermaintenance.
 • Pumpwearordamagecausedbyanyoilcontamination.
 • Pumpwearorvalvedamagecausedbyfailuretofollow
proper maintenance guidelines.
 • GasEngines,ifproductisequippedwithagasengine,
  seeenginemanualforspecicenginemanufacturer’s
warranty coverage.
Parts purchased separately: The warranty for parts purchased
separately such as: pumps, motors, etc., are as follows:
From Date of Purchase
 • Allsingle&twostagepumps 1year
 • Electricmotors 90days
 • Universalmotor/pump 30days
 • Allotherparts 30days
 • Noreturnauthorizationwillbeissuedforelectrical
components once items are installed.
How do You Get Service? In order to be eligible for service
under this warranty you must be the original retail purchaser,

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andprovideproofofpurchasefromoneoftheCompany’s
dealers, distributors, or retail outlet stores. Portable compressors
or components must be delivered, or shipped, to the nearest
Authorized Service Center. All associated freight costs and travel
charges must be borne by the consumer. Please call our toll free
number 1-888-895-4549 for assistance.
THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND
YOU MAY ALSO HAVE OTHER RIGHTS WHICH VARY FROM
STATE TO STATE.
THE COMPANY MAKES NO OTHER WARRANTY OR
REPRESENTATION OF ANY KIND WHATSOEVER,
EXPRESSED OR IMPLIED, EXCEPT THAT OF TITLE. ALL
IMPLIED WARRANTIES, INCLUDING ANY WARRANTY OF
MERCHANTABILITY AND FITNESS FOR PARTICULAR PURPOSE
ARE HEREBY DISCLAIMED. LIABILITY FOR CONSEQUENTIAL
AND INCIDENTAL DAMAGES UNDER ANY AND ALL
WARRANTIES, OTHER CONTRACTS, NEGLEGENCE, OR
OTHER TORTS IS EXCLUDED TO THE EXTENT EXCLUSION IS
PERMITTED BY LAW.
FREE WARNING LABEL REPLACEMENT: If your warning labels
become illegible or are missing, call 1-888-895-4549 for a free
replacement.

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GLOSSARY
CFM: Cubic feet per minute.
SCFM: Standard cubic feet per minute; a unit of measure of air
delivery.
PSI: Pounds per square inch; a unit of measure of pressure.
Code Certification: Products that bear one or more of the fol-
lowing marks: UL®*, CUL, ETL®*, CETL, have been evaluated by
OSHA certified independent safety laboratories and meet the
applicable Standards for Safety.
* UL®is a registered trademark of Underwriters Laboratories and
ETL®is a registered trademark of Electrical Testing Laboratories.
California Code: Unit may comply with California Code 462 (l) (2)/
(M) (2). Specification/model label is on the side of the air tank on
units that comply with California Code.
Unloader Blow-Off Pressure: All models are continuous running
units controlled by air tank pressure. When the maximum air tank
pressure is obtained, the unloader valve will blow-off. This will
cause the compressor to exhaust the air to the atmosphere and
not the tank. This decreases the load on the engine and allows it
to run at a near no-load condition.
Unloader Reset Pressure: When the air tank pressure drops to
a predetermined point, the unloader valve closes. The air tank
pressure will now increase until it reaches the unloader blow-off
pressure.

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Troubleshooting Guide
This section provides a list of the more frequently encountered malfunctions, their causes and corrective actions. The operator or
maintenance personnel can perform some corrective actions, and others may require the assistance of a qualified DeWALT technician or
your dealer.
Problem Code
Excessive air tank pressure-safety valve pops off ......................................................................1
Air leaks ....................................................................................................................................2
Continuous air leak at unloader valve. ......................................................................................3
Air leaks in air tank or at air tank welds ....................................................................................4
Air leaks between head and valve plate....................................................................................5
Air leaks from safety valve.........................................................................................................6
Compressor is not supplying enough air to operate accessories ............................................2, 7, 8, 9, 10, 12, 13
Restricted air intake................................................................................................................... 12
Excessive vibration.................................................................................................................... 13
Knocking Noise .........................................................................................................................6, 13
Engine will not run ..................................................................................................................... 14, 15, 16, 21
Pressure reading on the regulated pressure gauge drops when an accessory is used...........17
Regulator knob has continuous air leak....................................................................................18
Regulator will not shut off air outlet ..........................................................................................18
Pump will not run.......................................................................................................................19
Air tank pressure will not build ..................................................................................................19, 20