DeWalt DXCMLA1983054 User manual

DXCMLA1983054
Single Stage, Belt Drive, Electric Air Compressors
Compresseurs d’air électriques à un étage à entraînement par courroie
Compresores eléctricos de aire, de una sola etapa y accionamiento por correa
INSTRUCTION MANUAL
GUIDE D'UTILISATION
MANUAL DE INSTRUCCIONES
INSTRUCTIVO DE OPERACIÓN, CENTROS DE SERVICIO Y
PÓLIZA DE GARANTÍA. ADVERNTENCIA: 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
(JUNE12) Part No. 200-2893 DXCMLA1983054 Copyright ©2007, 2008, 2009, 2010 DEWALT

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Air Compressor
A. Pump Air Intake Filter
B. Auto(-)/Off(O) Switch
C. Air Tank Pressure Gauge
D. Regulated Pressure Gauge
E. Pressure Regulator
F. Air Outlet
G. Safety Valve
H. Air Tank Drain Valve
I. Pump Oil Fill Plug
J. Pump Oil Drain Plug
K. Check Valve
L. Quick Connect
Pump Specifications
2 Cylinder
Single Stage
Oil Lubricated
Cast iron crankcase, cylinder, and aluminum head
Weight: 41 lbs. (18.6 kg.)
Oil Capacity: 16 oz. (473 mL)
Specifications
MODEL DXCMLA1983054
WEIGHT 190 lbs. (87 kg)
HEIGHT 49.3”
WIDTH 25.05”
AIR TANK CAPACITY 30 gallons (113,6 liters)
APPROX. BLOW OFF PRESSURE
175 psi
FIG. 1
E
B
K
G
D
F
CL
J
B
A
I
H

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Hot Surfaces
FIG. 2
Definitions: Safety Guidelines
The definitions below describe the level of severity
for each signal word. Please read the manual and pay atten-
tion 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
WARNING: Do not operate this unit until you read this instruction
manual for safety, operation and maintenance instructions.
WARNING: CALIFORNIA PROPOSITION 65 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.
OUTLET TUBE
COMPRESSOR CYLINDER
& HEAD
PUMP
CRANKCASE

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• Unattendedoperationofthis
product could result in per-
sonal injury or property dam-
age. To reduce the risk of
fire, do no allow the com-
pressor to operator unat-
tended
• Alwaysremaininattendance
with the product when it is
operating.
• Alwaysturnoffandunplug
unit when not in use.
DANGER: RISK TO BREATHING (ASPHYXIATION)
WHAT CAN HAPPEN HOW TO PREVENT IT
• 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.
• 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.
SAVE THESE INSTRUCTIONS
DANGER: RISK OF EXPLOSION OR FIRE
WHAT CAN HAPPEN HOW TO PREVENT IT
• Itisnormalforelectricalcon-
tacts within the motor and
pressure switch to spark.
• Alwaysoperatethecompres-
sor in a well ventilated area
free of combustible materials,
gasoline, or solvent vapors.
• Ifelectricalsparksfromcom-
pressor come into contact
with flammable vapors, they
may ignite, causing fire or
explosion.
• Ifsprayingflammablemateri-
als, locate compressor at
least 20' (6.1m) away from
spray area. An additional
length of air hose may be
required.
• Storeflammablematerialsin
a secure location away from
compressor.
• Restrictinganyofthecom-
pressor ventilation openings
will cause serious overheat-
ing and could cause fire.
• Neverplaceobjectsagainst
or on top of compressor.
• Operatecompressorinan
open area at least 12”
(30.5 cm) away from any wall
or obstruction that would
restrict the flow of fresh air to
the ventilation openings.
• Operatecompressorina
clean, dry well ventilated
area. Do not operate unit in
any confined area. Store
indoors.

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DANGER: RISK OF BURSTING
Air Tank: On February 26, 2002, the U.S. Consumer Product Safety
Commission published Release # 02-108 concerning air compres-
sor tank safety:
Air compressor receiver tanks do not have an infinite life. Tank life is
dependent upon several factors, some of which include operating
conditions, ambient conditions, proper installations, field modifica-
tions, and the level of maintenance. The exact effect of these fac-
tors 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 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.
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
increments and frequently use
the tire gauge to prevent over
inflation.

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DANGER: RISK OF INJURY OR PROPERTY 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.
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.

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WARNING: RISK OF HOT SURFACES
WHAT CAN HAPPEN HOW TO PREVENT IT
• Touchingexposedmetalsuch
as the compressor head 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.
WARNING: RISK OF ELECTRICAL SHOCK
WHAT CAN HAPPEN HOW TO PREVENT IT
• Yourcompressorispowered
by electricity. Like any other
electrically powered device,
if it is not used properly it
may cause electric shock.
• Neveroperatethecompres-
sor outdoors when it is rain-
ing or in wet conditions.
• Neveroperatecompres-
sor with protective covers
removed or damaged.
• Repairsattemptedby
unqualified personnel can
result in serious injury or
death by electrocution.
• Anyelectricalwiringor
repairs required on this
product should be per-
formed by authorized ser-
vice center personnel in
accordance with national
and local electrical codes.
• Electrical Grounding:
Failure to provide adequate
grounding to this product
could result in serious injury
or death from electrocu-
tion. Refer to Grounding
Instructions paragraph in
the Installation section.
• Makecertainthattheelec-
trical circuit to which the
compressor is connected
provides proper electrical
grounding, correct voltage
and adequate fuse protection.

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WARNING: RISK FROM MOVING PARTS
WHAT CAN HAPPEN HOW TO PREVENT IT
• 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 seri-
ous 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 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.
CAUTION: 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.
SAVE THESE INSTRUCTIONS FOR
FUTURE USE
Know Your Air Compressor
READ THIS OWNER’S MANUAL AND SAFETY RULES BEFORE
OPERATING YOUR UNIT. Compare the illustrations with your
unit to familiarize yourself with the location of various controls
and adjustments. Save this manual for future reference.
FEATURES
AUTO (-) / OFF (O) SWITCH
Place this switch (B) in the AUTO (-) position to
provide automatic power to the pressure switch
and OFF(O) to remove power at the end of each
use. NOTE: ALWAYS ensure the switch (B) is in the
OFF (O) position before removing or replacing
pressure switch cover.
PRESSURE SWITCH
The pressure switch (B) automatically starts the motor when the air
tank pressure drops below the factory set cut-in pressure. It stops
the motor when the air tank pressure reaches the factory set cut-out
pressure.
SAFETY VALVE
This valve (G) is designed to prevent system
failures by relieving pressure from the system
when the compressed air reaches a predeter-
mined level. The valve is preset by the manu-
facturer and must not be removed or modified
in any way.
CHECK VALVE
When the air compressor is operating, the
check valve (K) is open, allowing compressed
air to enter the air tank. When the air compressor
B
G
K

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reaches cut-out pressure, the check valve closes, allowing air
pressure to remain inside the air tank.
AIR INTAKE FILTER
The filter (A) is designed to clean air entering the A
pump. 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 VALVE
The drain valve (H) is located ath the
base of the air tank and is used to drain
condensation at the end of each use. See
Draining Air Tank under Maintenance.
REGULATED PRESSURE GAUGE
The regulated pressure gauge (D)
indicates the air 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.
TANK PRESSURE GAUGE
The tank pressure gauge (C)
indicates the reserve air pressure in
the tank.
UNIVERSAL QUICK CONNECT
BODY
The universal quick connect body (L)
accepts the three most popular styles
of quick connect plugs: Industrial,
automotive, and ARO. One hand push-to-connect operation makes
connections simple and easy.
REGULATOR
The regulator knob (E) controls the air pressure coming from the air
tank.
To Adjust Regulator:
1. Pull regulator knob (E) out.
2. Turn knob clockwise to increase regulated pressure and
counter-clockwise to decrease regulated pressure.
3. When desired pressure is shown on the regulated pressure
gauge push knob in to lock.
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.
AIR COMPRESSOR PUMP
The pump compresses air into the air tank. Working air is not available
until the compressor has raised the air tank pressure above that
required at the air outlet.
MOTOR OVERLOAD PROTECTOR
The motor has a thermal overload protector.
N
If the motor overheats for any reason, the
overload protector will shut off the motor. The
motor must be allowed to cool down before
restarting. To restart:
1. Set the Auto/Off switch to OFF (O)
and unplug unit.
2. Allow the motor to cool.
3. Depress the red reset button (N) on the motor.
H
C
D
L
E

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4. Plug the power cord into the correct branch circuit receptacle.
5. Set the Auto/Off switch to AUTO (-).
INSTALLATION
Assembly (Fig. 1)
Unpack the air compressor. Inspect the unit for damage. If the
unit has been damaged in transit, contact the carrier and
complete a damage claim. Do this immediately because there
are time limitations to damage claims.
The carton should contain:
•air compressor
•operator and parts manuals
Check the compressor’s serial label to ensure that you have
received the model ordered, and that it has the required pressure
rating for its intended use.
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 (F). IMPORTANT: Do not assemble
splitters directly to the air outlet (F).
NOTE: Assembling quick connect bodies (L) to air outlet (F)
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 from air outlet (F).
Lubrication and Oil
AIR COMPRESSOR
The air compressor pump was filled WITH oil at the manufacturer.
Check air compressor pump oil level before operating unit. See
Compressor Pump Oil under Maintenance.
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.
NOTE: Always use an air line filter to remove moisture and oil vapor
when spraying paint.
Location
• Locatetheaircompressorinaclean,dry,andwellventilated
area.
• Locatedtheaircompressoratleast12”(30.5cm)awayfrom
the wall or other obstructions that will interfere with the flow of
air.
• Locatetheaircompressorasclosetothemainpowersupply
as possible to avoid using long lengths of electrical wiring.
NOTE: Long lengths of electrical wiring could cause power loss
to the motor.

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• Theairfiltermustbekeptclearofobstructionswhichcould
reduce air flow to the air compressor.
HUMID AREAS
In frequently humid areas, moisture may form in the pump and
produce sludge in the oil, causing running parts to wear out
prematurely. Excessive moisture is especially likely to occur if
the unit is located in an unheated area that is subject to large
temperature changes. Two signs of excessive humidity are external
condensation on the pump when it cools down and a “milky”
appearance in compressor oil. You may be able to prevent
moisture from forming in the pump by increasing ventilation or
operating for longer intervals.
Wiring Instructions
WARNING: Improper electrical installation of this product
may void its warranty and your re insurance. Have circuit wiring
performed by qualied personnel such as a licensed electrician
who is familiar with the current national electrical code and any
prevailing local electrical codes.
WARNING: Risk of electrical shock. Improper electrical
grounding can result in electrical shock. The wiring should be done
by a qualied electrician.
A qualified electrician needs to knows the following before wiring:
1. The amperage rating of the electrical box should be adequate.
Refer to the Specifications, in the parts manual, for this
information.
2. The supply line should have the same electrical characteristics
(voltage, cycle, phase) as the motor. Refer to the motor
nameplate, on side of motor, for this information.
NOTE: The wiring used must be rated for the motor nameplate
voltage, plus or minus 10%. Refer to local codes for recommended
wire sizes, correct wire size, and maximum wire run; undersize wire
causes high amp draw and overheating to the motor.
WARNING:Risk of electrical shock. Electrical wiring must
be located away from hot surfaces such as manifold assembly,
compressor outlet tubes, heads, or cylinders.
Grounding Instructions
WARNING: Risk of electrical shock. In the event of a short
circuit,grounding reduces the risk of shock by providing an escape
wire for the electric current.This air compressor must be properly
grounded.
The portable air compressor is equipped
P
O
Q
with a cord having a grounding wire with an
appropriate grounding plug.
1. The cord set and plug (O) with this
unit contains a grounding pin (P). This
plug MUST be used with a grounded
outlet (Q).
IMPORTANT: The outlet being used must be installed and grounded
in accordance with all local codes and ordinances.
2. Ensure the outlet being used has the same configuration as the
grounded plug. DO NOT USE AN ADAPTER.
3. Inspect the plug and cord before each use. Do not use if there
are signs of damage.
4. If these grounding instructions are not completely understood,
or if in doubt as to whether the compressor is properly grounded,
have the installation checked by a qualified electrician.
DANGER: Risk of electrical shock. IMPROPER GROUNDING
CAN RESULT IN ELECTRICAL SHOCK.
•Do not modify the plug provided. If it does not t the available

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outlet, a correct outlet should be installed by a qualied
electrician.
•Repairs to the cord set or plug MUST be made by a qualied
electrician.
Extension Cords
If an extension cord must be used, be sure it is:
 • a3wireextensioncordthathasa3bladegroundingplug,and
a 3-slot receptacle that will accept the plug on the product
 • ingoodcondition
 • plugisnotworn
 • nolongerthan50feet(15.2m)
 • 12gauge(AWG)orlarger.(Wiresizeincreasesasgaugenumber
decreases. 10 AWG and 8 AWG may also be used. DO NOT
USE 14 OR 16 AWG.)
NOTICE: The use of an undersized extension cord will cause volt-
age to drop resulting in power loss to the motor and overheating.
Instead of using an extension cord, increase the working reach of
the air hose by attaching another length of hose to its end. Attach
additional lengths of hose as needed. Always use a minimum 3/8”
(9.5 mm) or greater air hose rated at 300 psi.
Voltage and Circuit Protection
Refer to the Voltage and Minimum Branch Circuit Requirements
under Specifications.
CAUTION: Certain air compressors can be operated on a
15 amp circuit if the following conditions are met.
• Voltage supply to circuit must comply with the National
Electrical Code.
• Circuitisnotusedtosupplyanyotherelectricalneeds.
• Extensioncordscomplywithspecifications.
• Circuitisequippedwitha15ampcircuitbreakeror15amp
time delay fuse. NOTE: If compressor is connected to a circuit
protected by fuses, use only time delay fuses. Time delay
fuses should be marked “D” in Canada and “T” in the U.S.
If any of the above conditions cannot be met, or if operation of the
compressor repeatedly causes interruption of the power, it may be
necessary to operate it from a 20 amp circuit. It is not necessary to
change the cord set.
How to Use Your Unit (Fig 3)
How to Stop:
Set the Auto/Off switch to “Off”.
Before Starting
WARNING: Do not operate this unit until you read this 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 put into
service and when the check valve or a complete compressor pump
has been replaced.
1. Make sure the Auto/Off switch is in the “Off” position.
2. Check oil level in pump. See Oil paragraph in the Maintenance
section for instructions.
3. Plug the power cord into the correct branch circuit receptacle.
(Refer to Voltage and Circuit Protection paragraph in the
installation section of this manual.)
4. Open the drain valve (counterclockwise) fully to permit air to
escape and prevent air pressure build up in the air tank during

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the break-in period.
5. Move the Auto/Off switch to “Auto” position. The compressor
will start.
6. Run the compressor for 30 minutes. Make sure the drain valve
and all air lines are open so there is only a minimal air pressure
build-up in tank.
NOTE: After about 30 minutes, If the unit does not operate
properly, SHUT DOWN IMMEDIATELY, and contact
Product Service.
7. Check all air line fittings and connections/piping for air leaks
by applying a soap solution. Correct if necessary. NOTE: Minor
leaks can cause the air compressor to overwork, resulting in
premature breakdown or inadequate performance.
8. Check for excessive vibration. Readjust or shim air compres-
sor feet, if necessary.
9. After 30 minutes, turn the Auto/Off switch to the “Off” position.
10. Close the drain valve.
11. Turn the Auto/Off switch to the “Auto” position. The air receiver
will fill to “cut-out” pressure and the motor will stop.
The compressor is now ready for use.
Before Each Start-Up
1. Place Auto/Off switch to “Off”.
2. Close the drain valve.
3. Visually inspect air lines and fittings for leaks.
4. Check safety valve. See To Check Safety Valve under
Maintenance.
5. Pull the regulator knob out and turn counterclockwise to set
the outlet pressure to zero.
6. Attach hose and accessories.
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.
NOTE: The hose or accessory will require a quick connect plug if
the air outlet is equipped with a quick connect socket.
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.
CAUTION: Risk of unsafe operation. Compressed air from the
unit may contain water condensation and oil mist.Do not spray unl-
tered air at an item that could be damaged by moisture. Some air
tools and accessories may require ltered air. Read the instructions
for the air tools and accessories.
How to Start
1. Turn the Auto/Off switch to “Auto” and allow tank pressure to
build. Motor will stop when tank pressure reaches “cut-out”
pressure.
2. Pull the regulator knob out and turn clockwise to increase pres-
sure. When the desired pressure is reached push knob in to
lock in place.
IMPORTANT: When using regulator and other accessories refer to
the manufacturers instructions.
WARNING:Risk of bursting. If any unusual noise or vibration is
noticed,stop the compressor immediately and have it checked by a
trained service technician.
The compressor is ready for use.

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Shut-down (Fig. 1)
1. Move Auto/Off switch to the OFF position. NOTE: If finished
using compressor, follow Steps 2 - 6.
2. Pull the regulator knob out and turn counterclockwise until fully
closed. Ensure regulated pressure gauge reads 0 psi. Push
knob in to lock in place.
3. Remove hose and accessory.
WARNING: Risk of unsafe operation. Firmly grasp air hose in
hand when installing or disconnecting to prevent hose whip.
4. Drain the air tank, see Draining Air Tank under Maintenance .
Ensure air tank pressure gauge reads 0 psi.
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.
5. Allow the compressor to cool down.
6. Wipe air compressor clean and store in a safe, non-freezing
area.
MAINTENANCE
Maintenance Chart
Procedure
Daily
Weekly
Monthly
1 year
or 100
Hours
See tank
warning
label
Check safety valve X
Inspect air filter X+
Drain air tank X
OPEN
CLOSE
FIG. 3
OFF
AUTO

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Check pump oil level X
Change pump oil X **+
Oil leak inspection X
Inspect drive belt X
Check drive belt tension
X
Check pulley/flywheel alignment
X
Check for unusual noise/vibration X
Check for air leaks X*
Clean compressor exterior X
Remove tank from service X++
* 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.
** The pump oil must be changed after the first 20 hours or operation.
Thereafter, when using synth etic blend non-detergent air compressor
oil, change oil every 100 hours of operation or once a year, whichever
comes first.
+ Perform more frequent in dusty or humid conditions.
++
For more information, call 1-888-895-4549 .
WARNING: Risk of unsafe operation. Unit cycles automati-
cally when power is on. When performing maintenance, you may
be exposed to voltage sources, compressed air, or moving parts.
Personal injuries can occur. Before performing any maintenance or
repair, disconnect power source from the compressor and bleed off
all air pressure.
To ensure efficient operation and longer life of the air compressor
outfit, a routine maintenance schedule should be prepared and fol-
lowed. The following routine maintenance schedule is geared to an
outfit in a normal working environment operating on a daily basis.
If necessary, the schedule should be modified to suit the condi-
tions under which your compressor is used. The modifications will
depend upon the hours of operation and the working environment.
Compressor outfits in an extremely dirty and/or hostile environment
will require a greater frequency of all maintenance checks.
NOTE: See Operation section for the location of controls.
Checking Safety Valve (Fig. 1)
WARNING: Hot surfaces. Risk of burn.Tubes, pump head, and
surrounding parts are very hot, do not touch (see the Hot Surfaces
identied 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 ying objects. Always wear certied
safety equipment: ANSI Z87.1 eye protection (CAN/CSA Z94.3) with
side shields.
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 (Fig. 1)
WARNING: Hot surfaces. Risk of burn.Tubes, pump head, and
surrounding parts are very hot, do not touch (see the Hot Surfaces
identied in Fig. 2).Allow compressor to cool prior to servicing.
A dirty air filter will not allow the compressor to operate at full
capacity. Keep the air filter clean at all times.
1. Ensure Auto/Off switch (B) is in the OFF Position.
2. Allow unit to cool.
3. Remove the 3 phillips screws and washers from the pump
head.

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4. Remove the small plate, being careful not to drop anything
on the exposed valves.
5. Carefully lift out the air filter and screens. NOTE: The screen
edges are sharp.
6. Place cleaned or new air filter between the screens and
insert back into grooves. Refer to the Replacement Parts
under Service.
7. Place the plate back onto the pump head, insert the screws
and washers, tighten the screws.
CAUTION: Risk of unsafe operation. Do not operate without air
lter.
Draining Air Tank (Fig. 3)
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 ow 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. Set the Auto/Off switch to “Off”.
2. Pull the regulator knob out and turn 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.
Compressor Pump Oil (Fig. 4)
NOTICE: Risk of property damage. Use air compressor oil only.
Multi-weight automotive engine oils like 10W30 should not be used
in air compressors. They leave carbon deposits on critical compo-
nents, thus reducing performance and compressor life.
NOTE: Use synthetic blend, non-detergent air compressor oil.
NOTE: Crankcase oil capacity is approximately 16 fluid ounces
(473,2 ml).
Checking
1. The oil level should be to the middle of the sight glass (T).
2. If needed remove oil fill plug (R) and slowly add oil until it
reaches the middle of the sight glass.
Changing
WARNING: Drain tank to release air pressure before removing
the oil ll cap or oil drain plug.
1. Remove the oil fill plug (R).

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2. Remove the oil drain plug (S) and drain oil into a suitable con-
tainer.
3. Replace the oil drain plug (S) and tighten securely
4. Slowly add compressor oil until it reaches the middle of the
sight glass (T). NOTE: When filling the crankcase, the oil
flows very slowly into the pump. If the oil is added too quickly,
it will overflow and appear to be full.
CAUTION: Overlling with oil will cause premature compressor
failure. Do not overll.
5. Replace oil fill plug (R) and tighten securely.
U = Full
V = Add
S = Oil drain plug
T = Oil level sight glass
R = Oil fill plug
Fig. 4
Belt Replacement
WARNING: This unit starts automatically.ALWAYS shut off
and unplug the compressor, and bleed all pressure from the
system before servicing the compressor, and when the
compressor is not in use. Do not use the unit with the shrouds
or belt guard removed. Serious injury could occur from contact
with moving parts. Hot surfaces. Risk of burn. Pump head, and
surrounding parts are very hot, do not touch (see the Hot
Surfaces identied in Fig. 2).Allow compressor to cool prior to
servicing.
1. Set the Auto/Off lever to W
“Off”, unplug the unit,
and relieve all air pres-
sure from the air tank.
2. Remove the belt
guard by removing the
5 screws (W) using a
Phillips head screw-
driver.
3. Mark pump position on
saddle.
4. Loosen the motor mounting screws and slide the motor toward
the air compressor.
5. Remove the belt and replace with a new one.
6. See the Adjusting Belt Tension before tightening motor
mounting screws.
Adjusting Belt Tension
1. Slide motor into original position, line the motor up with the
mark made earlier on saddle.
2. Tighten two outside motor mounting screws enough to hold
the motor in place for checking pulley and flywheel alignment.
3. The belt should deflect 1/2” (13 mm)at midway between the
pulley and the flywheel when a 5 pound (2.26 kg.) weight is
applied at the midway point.

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3. When proper belt tension is achieved, tighten all four motor
mounting screws.
Downward Force
Deflection
Torque to 20-25 ft-lbs
(27.1–33.9 Nm).
NOTE: Once the engine
pulley has been moved
from its factory set location,
the grooves of the flywheel
and pulley must be aligned
to within 1/16” (1.6 mm)
to prevent excessive belt
wear. Verify the alignment
by performing the following
Motor Pulley/Flywheel -
Alignment.
Motor Pulley/Flywheel Alignment
NOTE: Once the motor pulley has been moved from its factory set
location, the grooves of the flywheel and pulley must be aligned to
within 1/16” (1.6 mm) to prevent excessive belt wear.
The air compressor flywheel and motor pulley must be in-line (in the
same plane) within 1/16” (1.6 mm) to assure belt retention within
flywheel belt grooves. To check alignment, perform the following
steps:
1. Set the Auto/Off lever to “Off”, unplug the unit, and relieve all
air pressure from the air tank.
2. Remove belt guard.
3. Place a straightedge
against the outside of
the flywheel and the
motor drive pulley.
4. Measure the distance
between the edge of the belt and the straightedge at points
A1 and A2 in figure. The difference between measurements
should be no more than 1/16” (1.6 mm).
5. If the difference is greater than 1/16” (1.6 mm) loosen the set
screw holding the motor drive pulley to the shaft and adjust
the pulley’s position on the shaft until the A1 and A2 measure-
ments are within 1/16” (1.6 mm) of each other.
6. Tighten the motor drive pulley set screw.
7. Visually inspect the motor drive pulley to verify that it is per-
pendicular to the drive motor shaft. Points B1 and B2 of Figure
should appear to be equal. If they are not, loosen the setscrew
of the motor drive pulley and equalize B1 and B2, using care
not to disturb the belt alignment performed in step 2.
8. Retightenthemotordrivepulleysetscrew.Torqueto145–165inlbs
(16.4–20.3Nm).
9. Reinstall belt guard.
Air Compressor Pump Intake and
Exhaust Valves
Once a year have a Trained Service Technician check the air com-
pressor pump intake and exhaust valves.
Inspect Air Lines and Fittings for Leaks
1. Set the Auto/Off lever to “Off”, unplug the unit, and relieve all
air pressure from the air tank.
2. Apply a soap solution to all air line fittings and connections/
piping.
3. Correct any leaks found.
IMPORTANT: Even minor leaks can cause the air compressor
to overwork, resulting in premature breakdown or inadequate
performance.

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Air compressor Head Bolts - Torquing
The air compressor pump head bolts should be kept properly
torqued. Check the torques of the head bolts after the first five
hours of operation. Torque to 14-16ft.-lbs. (18.9–21.7 Nm).
Service and Adjustments
ALL MAINTENANCE AND REPAIR OPERATIONS NOT LISTED
MUST BE PERFORMED BY TRAINED SERVICE TECHNICIAN.
Risk of unsafe operation. Unit cycles automati-
cally when power is on. When servicing, you may be exposed
to voltage sources, compressed air, or moving parts. Before
servicing unit unplug or disconnect electrical supply to the air
compressor, bleed tank of pressure, and allow the air compres-
sor to cool.
To Replace or Clean Check Valve
1. Release all air pressure from air tank. See Draining Air Tank in
the Maintenance section.
2. Set the Auto/Off lever to “Off”, unplug the unit, and relieve all
air pressure from the air tank.
3. Using an adjustable
In closed position
disc is visible.
In open
position
nothing is
visible.
Screwdriver
wrench loosen outlet
tube nut at air tank
and pump. Carefully
move outlet tube
away from check
valve.
4. Using an adjustable
wrench loosen pres-
sure relief tube nut
at air tank. Carefully
move pressure relief tube away from check valve.
5. Unscrew the check valve (turn counterclockwise) using a 7/8”
open end wrench. NOTE the orientation for reassembly.
6. Using a screwdriver, carefully push the valve disc up and
down. NOTE: The valve disc should move freely up and down
on a spring which holds the valve disc in the closed position, if
not the check valve needs to be cleaned or replaced.
7. Clean or replace the check valve. A solvent, such as paint or
varnish remover can be used to clean the check valve.
8. Apply sealant to the check valve threads. Reinstall the check
valve (turn clockwise).
9. Replace the pressure release tube. Tighten nuts.
10. Replace the outlet tube and tighten nuts.
11. Perform the Break-in Procedure. See Break-in Procedure in
the Operation section.
Additional Service
Disassembly or service of the air compressor beyond what is cov-
ered in this manual is not recommended. If additional service is
required, contact your nearest Authorized Warranty Service Center.
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: