DeWalt D55141 User manual

D55141
Oil Free Portable Air Compressor
Compresseur d’air portatif sans huile
Compresor de aire sin aceite 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.
1-800-4-DEWALT • www.dewalt.com

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English
A. On/Off Switch
B. Air Tank Pressure Gauge
C. Regulated Pressure Gauge
D. Pressure Regulator
E. Quick Connects
Pump/Motor Specifications
Oil free universal motor
Bore: 1.875 (47.63 mm)
Stroke: 1.25 (31.75 mm)
Voltage: Single 120V
Minimum branch circuit requirement: 15 A
Fuse Type: Time delay
Specifications
MODEL D55141
WEIGHT 30 lbs. (13.61 kg)
HEIGHT 10.5" (266.7 mm)
WIDTH 19.125" (485.8 mm)
LENGTH 21.375 (542.9 mm)
AIR TANK CAPACITY (GALLONS) 2.0 (7.6 liters)
APPROX CUT-IN PRESSURE
120 PSI (827.4 kPa)
APPROX. CUT-OUT PRESSURE
150 PSI (1034.2 kPa)
SCFM @ 100 PSI (689.5 kPa) 1.7
D55141 Air Compressor
C
FIG. 1 NOT A
STEP
H
A
D
B
E
I
G
F
F. Check Valve
G. Safety Valve
H. Air Tank Drain Valve
I. Power Cord Wrap

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Definitions: 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.
CAUTION: Used without the safety alert symbol
indicates a potentially hazardous situation 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:
1-800-4-D
E WALT (1-800-433-9258)
Important Safety Instructions
Important Safety Instructions
WARNING: Do not operate this unit until you read and understand
this instruction manual for safety, operation and maintenance
instructions.
WARNING: Some dust created by power sanding, sawing, grind-
ing, drilling, and other construction activities contains chemicals
known (to the State of California) to cause cancer, birth defects or
other reproductive harm. Some example of these chemicals are:
• lead from lead-based paints
• crystalline silica from bricks and cement and other masonry
products
• arsenic and chromium from chemically-treated lumber
Your risk from these exposures varies, depending on how often
you do this type of work. To reduce your exposure to these chemi-
cals: work in a well ventilated area, and work with approved safety
equipment, always wear OSHA/MSHA/NIOSH approved, properly
fitting face mask or respirator when using such tools.
When using air tools, basic safety precautions should always be fol-
lowed to reduce the risk of of personal injury.
SAVE THESE INSTRUCTION
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
compressor come into con-
tact with flammable vapors,
they may ignite, causing fire
or explosion.
• If spraying flammable materi-
als, locate compressor at
least 20 feet (6.1 m) away
from spray area. An addi-
tional length of hose may be
required.
• Store flammable materials in
a secure location away from
compressor.

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• 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 indoors or
in any confined 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 unat-
tended.
• Always remain in attendance
with the product when it is
operating.
• Always disconnect electrical
power by moving the On/Off
switch in the OFF position
and drain tank daily or after
each 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
contaminant's can cause
serious injury or death.
• Air obtained directly from the
compressor should never be
used to supply air for human
consumption. In order to use air
produced by this compressor
for breathing, suitable filters
and in-line safety equipment
must be properly installed. In-
line filters and safety equipment
used in conjunction with the
compressor must be capable
of treating air to all applicable
local and federal codes prior to
human consumption.
• 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:
OSHA/MSHA/NIOSH
respiratory protection designed
for use with your specific
application.

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WARNING: RISK OF BURSTING
Air Tank: The air tank on your Air Compressor is designed and may
be UM coded (for units with air tanks greater than 6 inch diameter)
according to ASME Section VIII, Div. 1 rules. All pressure vessels
should be inspected once every two years. To find your state pressure
vessels inspector, look under the Division of Labor and Industries in
the government section of a phone book or call 1-800-4-DEWALT for
assistance.
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.
WARNING: RISK OF ELECTRICAL SHOCK
WHAT CAN HAPPEN HOW TO PREVENT IT
• Your air 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 compressor
outdoors when it is raining or
in wet conditions.
• Never operate compressor
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 performed
by a DEWALT factory
service center or a DEWALT
authorized service center in
accordance with national and
local electrical codes.

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• Electrical Grounding:
Failure to provide adequate
grounding to this product
could result in serious injury
or death from electrocution.
See Grounding
Instructions under
Installation.
• Make certain that the
electrical circuit to which the
compressor is connected
provides proper electrical
grounding, correct voltage and
adequate fuse protection.
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 compressor head,
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.
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.

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• 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 operation 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.
• Become familiar with the
operation and controls of the
air compressor.
• Keep operating area clear of all
persons, pets, and obstacles.
• Keep children 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 operate machine with
missing, broken, or unautho-
rized parts.
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
FEATURES
ON(I)/OFF SWITCH (I/O)
Place this switch (A) in the ON position to provide
A
automatic power to the pressure switch and
OFF to remove power at the end of each use.
PRESSURE SWITCH
The pressure switch 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.

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SAFETY VALVE
If the pressure switch does not shut off the air
G
F
compressor at its cut-out pressure setting, the
safety valve (G) will protect against high pres-
sure by popping out at its factory set pressure
(slightly higher than the pressure switch cut-out
setting).
CHECK VALVE
When the air compressor is operating, the
check valve (F) is open, allowing compressed air to enter the air
tank. When the air compressor reaches cut-out pressure, the check
valve closes, allowing air pressure to remain inside the air tank.
TANK PRESSURE GAUGE
The tank pressure gauge (B) indicates C
D
B
E
the reserve air pressure in the tank.
OUTLET PRESSURE GAUGE
The outlet pressure gauge (C) indi-
cates the air pressure available at the
outlet side of the regulator. This pres-
sure is controlled by the regulator and
is always less than or equal to the tank pressure.
REGULATOR
The regulator (D) controls the air pressure shown on the outlet
pressure gauge. Turn regulator knob clockwise to increase pres-
sure and counterclockwise to decrease pressure.
UNIVERSAL QUICK CONNECT BODIES
The universal Quick Connect body (E) accepts the three most
popular styles of Quick Connect plugs: Industrial, automotive, and
ARO. The two quick connect bodies allow the use of two tools at the
same time.
DRAIN VALVE
The drain valve (H) is located at the base of the air H
tank and is used to drain condensation at the end of
each use.
See Draining Air Tank under
Maintenance.
COOLING SYSTEM
This compressor contains an advanced design cooling system.
It is normal for this fan to blow air through the vent holes in large
amounts. The cooling system is working when air is expelled.
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 an automatic reset thermal overload protector. 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. The compressor will automatically restart after the motor
cools.
INSTALLATION
Assembly
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 (0 kPa).
2. Grasp the hose at the Quick Connect plug and push the plug
into the Quick Connect body (E). Coupler will snap into place.
3. Grasp the hose and pull to ensure coupler is seated.

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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 (0 kPa).
2. Pull coupler on Quick Connect body back to release Quick
Connect plug on hose.
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 with a cord having a
grounding wire with an appropriate grounding plug.
1. The cord set and plug (J) with this unit
L
J
K
contains a grounding pin (L). This plug
MUST be used with a grounded outlet
(K).
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 fit the available out-
let, a correct outlet should be installed by a qualified electrician.
Repairs to the cord set or plug MUST be made by a qualified
electrician.
Extension Cords
Using extension cords is not recommended. The use of extension
cords will cause voltage 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.
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
• no longer than 50 feet (15,2 m)
• 14 gauge (AWG) or larger. (Wire size increases as gauge num-
ber decreases. 12 AWG and 10 AWG may also be used. DO
NOT USE 16 OR 18 AWG.)
Voltage and Circuit Protection
Refer to the Voltage and Minimum Branch Circuit Requirements under
Pump/Motor 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 US.

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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.
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
Place the air compressor in a clean, dry and well ventilated area at
least 12" (304.8 mm) away from the wall or other obstructions that
will interfere with the flow of air. Keep the compressor away from
areas that have dirt and/or volatile fumes in the atmosphere. These
impurities may clog the intake filter and valves, causing inefficient
operation.
The air compressor pump and shroud are designed to allow for
proper cooling. The ventilation openings on the compressor are
necessary to maintain proper operating temperature. Do not place
rags or other containers on or near these openings.
Place the air compressor on a flat surface resting on the rubber
feet.
NOISE CONSIDERATIONS
Consult local officials for information regarding acceptable noise
levels in your area. To reduce excessive noise, use vibration mounts
or silencers, relocate the unit or construct total enclosures or baffle
walls. Contact a D
E WALT service center or call 1-800-4-D E WALT for
assistance.
ELECTRICAL
Refer to all safety instructions before using unit. Observe extension
cord safety instructions if necessary. Always move the On/Off
switch (A) to the OFF position before removing the plug from the
outlet.
TRANSPORTING
When transporting the compressor in a vehicle, trailer, etc., ensure
that the tank is drained and the unit is secured. Use care when driv-
ing to avoid tipping the unit over in the vehicle. Damage can occur to
the compressor or surrounding items if the compressor is tipped.
MOVING
When moving the compressor, grasp the handle and carry the com-
pressor as close to the body as possible.
WARNING: Ensure proper footing and use caution when carrying
compressor to avoid a loss of balance.
PREPARATION FOR USE
Pre-Start Checklist (Fig. 1)
1. Ensure the On/Off switch (A) is in the OFF position.
2. Plug the power cord into the correct branch circuit receptacle. See
Voltage and Circuit Protection under Installation.
3. Ensure air tank is drained, see Draining Air Tank under
Maintenance.
4. Ensure the drain valve (H) is closed.
5. Ensure safety valve (G) is functioning properly, see Checking
Safety Valve under Maintenance.
6. Turn regulator knob (D) counterclockwise until fully closed. Ensure
regulated pressure gauge reads 0 PSI (0 kPa).
7. Attach hose and accessories.

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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.
Initial Set-up (Fig. 1)
WARNING: Do not operate this unit until you read and understand
this instruction manual for safety, operation and maintenance
instructions.
BREAK-IN PROCEDURE
WARNING: 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 for the first time and when the check valve or a compressor
pump/motor has been replaced.
1. Ensure the On/Off switch (A) is in the OFF position.
NOTE: If hose is not connected to Quick Connect body, pull coupler
back until it clicks to prevent air from escaping through the quick
connect.
2.
Plug the power cord into the correct branch circuit receptacle. See
Voltage and Circuit Protection under Installation.
3. Open the drain valve (counter-clockwise) fully to permit air to
escape and prevent air pressure build up in the air tank during
the break-in period.
4. Move the On/Off switch to the ON position. The compressor will
start.
5. Run the compressor for 15 minutes.
6. After 15 minutes, close the drain valve by turning clockwise.
The tank will fill to cut-out pressure and the motor will stop.
7. Compressed air will be available until it is used or bled off.
OPERATING PROCEDURES
Start-up (Fig. 1)
1. Follow Pre-Start Checklist under Preparation for Use.
2. Move the On/Off switch to the ON position and allow tank pres-
sure to build. Motor will stop when tank pressure reaches
cut-out pressure.
CAUTION: Risk of unsafe operation. Compressed air from the unit
may contain water condensation and oil mist. Do not spray unfiltered
air at an item that could be damaged by moisture. Some air oper-
ated tools or devices may require filtered air. Read the instructions
for the air tool or device.
3. Adjust regulator (D) to desired setting. See Regulator under
Features.
Shut-down (Fig. 1)
1 Move On/Off switch (A) is in the OFF position. NOTE: If finished
using compressor, follow Steps 2 - 6.
NOTE: When the unit has been turned off, it is normal to hear a short
hiss of air being released.
2. Turn regulator knob (D) counterclockwise until fully closed. Ensure
regulated pressure gauge reads 0 PSI (0 kPa).
3. Remove hose and accessory.
4. Drain the air tank,
see Draining Air Tank under Maintenance .
Ensure air tank pressure gauge reads 0 PSI (0 kPa).
WARNING: Risk of bursting. Drain air tank daily. Water will con-
dense 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.

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MAINTENANCE
The following procedures must be followed when maintenance or
service is performed on the air compressor.
1. Ensure On/Off switch is in the OFF position.
2. Remove air compressor plug from outlet.
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 D
E WALT factory service center or a D E WALT
authorized service center.
Maintenance Chart
Procedure Before Each
Use Daily or after each use
Check safety valve X
Drain air tank X
Checking Safety Valve
WARNING: Risk of bursting. If the safety valve does not work
properly, over-pressurization may occur, causing air tank rupture or
an explosion.
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.
Draining Air Tank (Fig. 1)
WARNING: Risk of unsafe operation. Risk from noise. Air tanks
contain high pressure air. Keep face and other body parts away from
outlet of drain. Use safety glasses when draining as debris can be
kicked up into face. Use ANSI S12.6 (S3.19) ear protection as air flow
noise is loud when draining.
NOTE: All compressed air systems generate condensate that
accumulates 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 On/Off switch (A) is in the OFF position.
2. Move compressor into an inclined position so drain valve (H) is
at the lowest point (this will assist in removing moisture, dirt, etc.
from air tanks)
3. Place a suitable container under the drain valve to catch
discharge.
4. Grasp black lever on drain valve.
5. Slowly rotate lever to gradually bleed air from air tank.
6. When air tank pressure gauge reads 10 PSI (275.1 kPa), rotate
valve to the fully open position.
7. Close drain valve when finished.

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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 contact D
E WALT Industrial Tool Co., 701 East Joppa Road,
Baltimore, MD 21286, call 1-800-4-D
E WALT (1-800-433-9258) or visit
our website www.dewalt.com.
CAUTION: 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.
Full One Year Warranty
DEWALT heavy duty industrial tools are warranted for one year from
date of purchase. We will repair, without charge, any defects due
to faulty materials or workmanship. For warranty repair information,
call 1-800-4-D
E WALT. This warranty does not apply to accessories
or damage caused where repairs have been made or attempted by
others. This warranty gives you specific legal rights and you may
have other rights which vary in certain states or provinces.
LATIN AMERICA: This warranty does not apply to products sold
in Latin America. For products sold in Latin America, see country
specific warranty information contained either in the packaging, call
the local company or see website for warranty information.
FREE WARNING LABEL REPLACEMENT: If your warning labels
become illegible or are missing, call 1-800-4-D
E WALT 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 following marks: UL, CUL, ETL, CETL, have been evaluated by OSHA certified
independent safety laboratories and meet the applicable Underwriters Laboratories Standards for Safety.
Cut-In Pressure: While the motor is off, air tank pressure drops when accessory is used. When the tank pressure drops to a certain low
level the motor will restart automatically. The low pressure at which the motor automatically restarts is called cut-in pressure.
Cut-Out Pressure: When an air compressor is turned on and begins to run, air pressure in the air tank begins to build. It builds to a
certain high pressure before the motor automatically shuts off, protecting your air tank from pressure higher than its capacity. The high
pressure at which the motor shuts off is called cut-out pressure.
Branch Circuit: The circuit carrying electricity from electrical panel to outlet.
Duty Cycle: This air compressor pump is capable of running continuously. However, to prolong the life of your air compressor, it is
recommended that a 50%-75% average duty cycle be maintained; that is, the air compressor pump should not run more than 30-
45 minutes in any given hour.

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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 ......................................................................1,2
Air leaks ....................................................................................................................................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
Knocking Noise..........................................................................................................................6
Pressure reading on the regulated pressure gauge drops when an accessory is used...........7
Compressor is not supplying enough air to operate accessories..............................................8,9,10,11,12
Regulator knob has continuous air leak ....................................................................................13
Regulator will not shut off air outlet ...........................................................................................13
Troubleshooting Codes
CODE POSSIBLE CAUSE POSSIBLE SOLUTION
1 Pressure switch does not shut off motor when compressor
reaches cut-out pressure Set the On/Off switch to OFF, if the unit does not shut
off contact a D
E WALT factory service center or a D E WALT
authorized service center.
2Pressure switch cut-out too high Contact a D E WALT factory service center or a D E WALT
authorized service center.
3Tube fittings are not tight enough Tighten fittings where air can be heard escaping. Check
fittings with soapy water solution. Do Not Overtighten.

16
English
CODE POSSIBLE CAUSE POSSIBLE SOLUTION
4 Defective air tank Air tank must be replaced. Do not repair the leak.
WARNING: Risk of bursting. Do not drill into, weld or
otherwise modify air tank or it will weaken. The air tank can
rupture or explode.
5 Leaking seals Contact a D
E WALT factory service center or a D E WALT
authorized service center.
6 Defective safety valve Operate safety valve manually by pulling on ring. If valve
still leaks, it must be replaced.
7Regulator is not adjusted correctly for accessory being
used It is normal for some pressure drop to occur when an acces- sory is used, adjust the regulator as instructed in Regulator
under Features if pressure drop is excessive.
NOTE: Adjust the regulated pressure under flow conditions
while accessory is being used.
8 Prolonged excessive use of air Decrease amount of air usage.
9 Compressor is not large enough for accessory Check the accessory air requirement. If it is higher than
the CFM or pressure supplied by your air compressor, a
larger compressor is needed to operate accessory.
10 Hole in air hose Replace air hose.
11 Check valve restricted Remove, clean or replace.
12 Air leaks Tighten fittings.
13 Regulator is damaged Replace.

17
Français
Compresseur d’air, modèle D55141
C
FIG. 1 PAS UNE
ÉTAPE
H
A
D
B
E
I
G
F
A. Interrupteur Marche/Arrêt
B. Manomètre du réservoir d’air
C. Manomètre régulé
D. Régulateur de pression
E. Branchements rapides
F. Clapet
G. Soupape de sûreté
H. Soupape de purge du
réservoir d’air
I. Rembobineur de cordon
d’alimentation
Fiche technique de la pompe/du moteur
Moteur universel sans huile
Alésage : 47,63 mm (1,875 po)
Course : 31,75 mm (1,25 po)
Tension : monophasé, 120V
Exigence minimale du circuit de dérivation : 15 A
Type de fusible : temporisation
Fiche technique
MODÈLE D55141
POIDS 13,61 kg (30 lbs.)
HAUTEUR 266,7 mm (10,5 po)
LARGEUR 485,8 mm (19,125 po)
LONGUEUR 542,9 mm (21,375 po)
CAPACITÉ DU RÉSERVOIR D’AIR
(GALLONS) 2,0 (7,6 liters)
PRESSION D’ENCLENCHEMENT
APPROX.
827,4 kPa (120 PSI)
ENV. PRESSION DE DÉCLENCHEMENT
1034,2 kPa (150 PSI)
PCMS (SCFM) @ 100 PSI (689,5 kPa) 1,7

18
Français
Définitions : lignes directrices en
matière de sécurité
Les définitions ci-dessous décrivent le niveau de gravité pour
chaque symbole. Veuillez lire le mode d’emploi et porter une atten-
tion particulière à ces symboles.
DANGER : Indique une situation dangereuse imminente qui, si
elle n’est pas évitée, causera la mort ou des blessures graves.
AVERTISSEMENT : Indique une situation potentiellement dan-
gereuse qui, si elle n’est pas évitée, pourrait se solder par un
décès ou des blessures graves.
MISE EN GARDE : Indique une situation potentiellement dan-
gereuse qui, si elle n’est pas évitée pourrait se solder par des
blessures mineures ou modérées.
MISE EN GARDE : Utilisé sans le symbole d’alerte à la sécurité,
indique une situation potentiellement dangereuse qui, si elle n'est
pas évitée pourrait se solder par des dommages à la propriété.
POURTOUTESQUESTIONSOUCOMMENTAIRESRELATIFS(VES)
À L’OUTIL OU À PROPOS DE TOUT AUTRE OUTIL D
E WALT,
COMPOSER SANS FRAIS LE : 1-800-4-D
EWALT (1-800-433-9258)
Directives de sécurité importantes
AVERTISSEMENT : Ne pas utiliser cet appareil avant d’avoir lu
et compris le mode d’emploi ainsi que l’intégralité des directives de
sécurité, d’utilisation et d’entretien.
AVERTISSEMENT : Nertaines poussières produites par les travaux
de ponçage, sciage, meulage, perçage et autres peuvent contenir des
produits chimiques pouvant (selon l’état de Californie) causer le cancer,
des anomalies congénitales ou d’autres problèmes liés aux fonctions
reproductrices. Voici quelques exemples de ces produits chimiques :
• le plomb contenu dans les peintures à base de plomb;
• la silice cristalline provenant de la brique, du ciment et d’autres
produits de maçonnerie;
• l’arsenic et chrome provenant de bois traité chimiquement.
Les risques reliés à l’exposition à ces poussières varient selon la
fréquence à laquelle l’utilisateur travaille avec ce type de matériaux.
Pour réduire votre exposition à ces produits chimiques : travailler dans
un endroit bien ventilé et porter un équipement de sécurité approuvé
par l’OSHA/MSHA/NIOSH comme un masque anti-poussières
spécialement adapté ou un respirateur lors de l’utilisation de ces
outils.
Lors de l’utilisation d’outils pneumatiques, des précautions de base
en matière de sécurité doivent être suivies afin de réduire le risque de
blessure personnelle.
CONSERVER CES DIRECTIVES
AVERTISSEMENT : Risque d’explosion ou d’incendie
CE QUI PEUT SE PRODUIRE COMMENT L’ÉVITER
• Il est normal que des
contacts électriques dans le
moteur et le manocontacteur
fassent une étincelle.
• Faites toujours fonctionner
le compresseur dans une
zone bien aérée sans matière
combustible, essence ou
vapeur de solvant.

19
Français
• Si une étincelle électrique
provenant du compresseur
entre en contact avec des
vapeurs inflammables,
elle peut s’enflammer et
causer un incendie ou une
explosion.
• Si vous aspergez des
matériaux inflammables,
placez le compresseur à
au moins 6,1 m (20 pieds)
de la zone pulvérisée. Il est
possible que vous ayez besoin
d’une longueur de tuyau
additionnelle.
• Entreposez les matières
inflammables dans un
endroit sécuritaire, éloigné du
compresseur.
• Le fait de limiter les
ouvertures d’aération de
compresseur causera une
importante surchauffe et
pourrait causer un incendie.
• Ne placez jamais des objets
contre le compresseur ou sur
celui-ci.
• Faites fonctionner le
compresseur dans un endroit
aéré à au moins 30,5 cm
(12 po) du mur ou de
l’obstruction qui pourrait limiter
le débit d’air frais dans les
ouvertures d’aération.
• Faites fonctionner le
compresseur dans un endroit
propre, sec et bien aéré.
Ne pas utiliser l’appareil à
l’intérieur ou dans un endroit
exigu.
• Le fonctionnement de ce
produit sans surveillance
pourrait se solder par des
blessures personnelles
ou des dommages à la
propriété. Afin de réduire
le risque d’incendie, ne
pas laisser le compresseur
fonctionner sans surveillance.
• Être toujours présent lorsque
le produit est en marche.
• Toujours débrancher le cordon
d’alimentation en mettant
l’interrupteur marche/arrêt en
position ARRÊT et purger le
réservoir quotidiennement ou
après chaque utilisation.
DANGER : RISQUE REPIRATOIRE (ASPHYXIE)
CE QUI PEUT SE PRODUIRE COMMENT L’ÉVITER
• Il est dangereux de respirer
l’air comprimé sortant du
compresseur. Le flux d’air
peut contenir du monoxyde
de carbone, des vapeurs
toxiques ou des particules
solides provenant du réservoir
d’air. L’inhalation de ces
contaminants peut provoquer
de sérieuses blessures, voire
un décès.
• L’air qui s’obtient directement du
compresseur ne devrait jamais
être utilisé pour alimenter l’air
destiné à la consommation
humaine. Pour utiliser l’air
produit par le compresseur
pour la respiration, installer
correctement des filtres
convenables et un équipement
de sécurité en ligne. Les
filtres en ligne et l’équipement
de sécurité utilisés avec
le compresseur doivent
être capables de traiter l’air
conformément à tous les codes
locaux et fédéraux en vigueur
avant toute consommation
humaine.

20
Français
• Les matériaux vaporisés
comme la peinture, les
solvants de peinture, les
décapants, les insecticides,
les herbicides, pourraient
contenir des vapeurs nocives
et du poison.
• Travailler dans un endroit
ayant une bonne ventilation
transversale. Lire et respecter
les directives en matière
de sécurité imprimées sur
l’étiquette ou les fiches
signalétiques des matériaux qui
sont pulvérisés.Toujours utiliser
un équipement de sécurité
homologué : une protection
respiratoire conforme aux
normes OSHA/MSHA/NIOSH,
conçue spécifiquement pour
une utilisation particulière.
AVERTISSEMENT : RISQUE D’ÉCLATEMENT
Réservoir d’air : le réservoir dont est doté le compresseur d’air porte le
code « UM » (dans le cas d’appareils munis de réservoirs supérieurs à
152 mm (6 po) de diamètre) et il est conçu conformément à la section
VII Div. 1 de l’ASME. Tous les récipients sous pression devraient être
inspectés une fois tous les deux ans. Pour localiser l’inspecteur des
récipients sous pression de votre région, consulter la section appropriée
des organismes gouvernementaux de l’annuaire téléphonique ou
composer le 1-800-4-DEWALT pour obtenir de l’aide.
Les conditions indiquées ci-après pourraient affaiblir le réservoir d’air et
se solder par une violente explosion de celui-ci :
CE QUI PEUT SE PRODUIRE COMMENT L’ÉVITER
• L’eau condensée n’est pas
correctement vidangée du
réservoir d’air provoquant
ainsi la formation de rouille
et un amincissement du
réservoir d’air en acier.
• Vidanger le réservoir d’air
quotidiennement ou après
chaque utilisation. Si le réservoir
présente une fuite, le remplacer
immédiatement par un nouveau
réservoir d’air ou par un
nouveau compresseur.
• Modifications apportées au
réservoir d’air ou tentatives de
réparation.
• Ne jamais percer un trou
dans le réservoir d’air ou ses
accessoires, y faire de la
soudure ou y apporter quelque
modification que ce soit. Ne
jamais essayer de réparer un
réservoir d’air endommagé ou
avec des fuites. Le remplacer
par un nouveau réservoir d’air.
• Des modifications non
autorisées de la soupape
de sûreté ou de tous autres
composants qui régissent la
pression du réservoir d’air.
• Le réservoir d’air a été conçu
pour supporter des pressions
spécifiques de fonctionnement.
Ne faites jamais effectuer de
réglages ou de substitutions de
pièces en vue de modifier les
pressions de fonctionnement
réglées en usine.