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

2
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

3
English
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

4
English
• 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.

5
English
 • 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.

6
English
• 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.

7
English
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.

8
English
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.

9
English
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

10
English
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.