DeWalt D55140 User manual

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iNSTRUCTiON MANUAL
GUIDE D'UTILISATION
MANUAL DE INSTRUCCIONES
INSTRUCTIVO DE OPERACION, CENTROS DE SERVICIO Y POLIZA
DE GARANTiA. ADVERTENClA: Lt_ASE ESTE INSTRUCTIVO ANTES
DE USAR EL PRODUCTO.
®
D55140
Oil Free Portable Air Compressor
Compresseur d'air portatif sans huile
Compresor de aire sin aceite portatil

D55140 Air Compressor
A. On/Off Switch E. Quick Connect
B. Air Tank Pressure Gauge R Safety Valve
C. Regulated Pressure Gauge G. Air Tank Drain Valve
D. Pressure Regulator H. Power Cord Wrap
Pump/Motor Specifications
Oil free universal motor
Bore: 1.57 (40 mm)
Stroke: .55 (14 mm)
Voltage: Single 120V
Minimum branch circuit requirement: 15 A
Fuse Type: Time delay
Specifications
MODEL D55140
WEIGHT 24 Ibs. (11.79 kg)
HEIGHT 11.75" (298.5 mm)
WIDTH 14.895" (377.8 mm)
LENGTH 18.5 (469.9 mm)
AIR TANK CAPACITY (GALLONS) 1.0 (3.8 liters)
APPROX CUT-IN PRESSURE 105 PSI (723.9 kPa)
APPROX. CUT-OUT PRESSURE 135 PSI (930 kPa)
SCFM @ 100 PSI (689.5 kPa) .07
FIG. 1
NOT A
STEP

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, ff not avoided, will result in death
or serious injury.
_&WARNING: Indicates a potentially hazardous
situation which, ff not avoided, could result in death
or serious injury.
_kCAUTION: Indicates a potentially hazardous
situation which, ff not avoided, may result in minor
or moderate injury.
CAUTION: Used without the safety alert symbol
indicates a potentially hazardous situation which, ff
not avoided, may result in property damage.
IF YOU HAVE ANY QUESTIONS OR COMMENTS ABOUT
THIS OR ANY DEWALT TOOL, CALL US TOLL FREE AT:
1-800-4-DEWALT (1-800-433-9258)
Irnportant Safety Instructions
WARNING: Do not operate this unit until you read and understand
this instruction manual for safety, operation and maintenance
instructions.
_kWARNING: Some dust created by power sanding, sawing, grind-
ing, drilling, and other construction activities contains chemicals
known to the State of California tocause cancer, birth defects or other
reproductive harm. Some example of these chemicals are:
* lead from lead-basedpaints
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 weft 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,
i_ WARNING: This product contains chemicals, including lead,
known to the State of Cafifornia to cause cancer, and birth
defects or other reproductive harm. Wash hands after handling.
SAVE THESE INSTRUCTION
_&DANGER: RISK OF EXPLOSION OR FIRE
WHAT CAN HAPPEN HOWTO PREVENT iT
•It isnormal for e!eCtdca! Con' Always Operate the CompieS_
tacts within the motor and sor in a we!l ventilated area
pressure SWitchto Spark. free of combustible materials,
gasoline; OrSolvent vapor&
If electrical sparks from
compressor come into con-
tact with flammable vapors,
they may ignite, causing fire
or explosion.
Ifspraying 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
asecure location away from
compressor.

• Unattendedoperationof
thisproductcouldresultin
personalinjuryorproperty
damage.Toreducethe
riskoffire.donotallowthe
compressortooperate
unattended.
•Restricting any of the corn- •Never place objects against or
pressor ventilation openings on top of compressor.
will cause serious overheat- _ Operate compressor in
ing and could cause fire. 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.
• Always 'emaln 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 HOWTO PREVENT IT
-The compressed air directly -Air obtained directly from the
from your compressor is not compressor should never be
safe for breathing. The air used to supply air for human
stream maycontain carbon consumption. Inorder to use air
monoxide, toxic vapors, produced by this compressor
or solid particles from the for breathing, suitable filters
air tank. Breathing these and in-line safety equipment
contaminant's can cause must be properly installed. In-
serious injury or death, 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 • Work in an area with good
paint, paint solvents, paint cross ventilation. Read and
remover, insecticides, weed follow the safety instructions
killers, may contain harmful provided on the label or safety
vapors and poisons, data sheets for the materials
you are spraying. Always use
certified safety equipment:
OSHAiMSHAiN IOSH
respiratory protection designed
for use with your specific
application.

,& 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 _ook 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
Failure to properly drain
condensed water from
air tank, causing rust and
thinning of the steel air tank.
HOW TO PREVENT IT
Drain air tank daily or after
each use. Ifair tank develops
a leak, replace it immediately
with a new air tank or replace
the entire compressor.
'Mod fications or attempted .Never drill nto,weld, or make
repairs t0 the air tank. any modifications to the air
tank or its attachments. Never
: attempt to repaira damaged or
: : leaking air tank. ReplaCewith a
: new air tank.
• Unauthorized modifications to • The air tank is designed
the safety valve or any other to withstand specific
components which control air operating pressures. Never
tank pressure, make adjustments or parts
substitutions to alter the factory
set operating pressures.
Attachments & accessories:
Exceeding the pressure = Follow the equipment
rating of air tools, spray guns, manufacturers
a_roperated accessories, recommendation and never
tires and other inflatables exceed the maximum allowable
can cause them to explode or pressure rating of attachments.
fly apart, and could result in Never use compressor to
serious injury, inflate small low pressure
objects such as children's toys,
footballs, basketballs, etc.
&WARNING: RISK OF ELECTRICAL SHOCK
WHAT CAN HAPPEN
• Your air compressor is
powered by electricity.
Like any other electrically
powered device, If it is not
used properly it may cause
electric shock.
HOWTO PREVENT IT
• 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 : . Any electrical Wiringor
unqualified personne can repairs required on this
reSut nserous njury:0r product should be performed
death bye_ectrocution, i by a DEWALTfactory
service center or a DEWALT
authorized service center in
:: : acCoidance with national and
: local electrical codes.

• ElectricalGrounding:
Failuretoprovideadequate
groundingtothisproduct
couldresultinseriousinjury
ordeathfromelectrocution.
SeeGrounding
Instructionsunder
Installation.
• Make certain that the
electrical circuit to which the
compressor is connected
provides proper electrical
grounding, correct voltage and
adequate fuse protection.
_kWARNING: RISK FROM FLYING OBJECTS
WHAT CAN HAPPEN HOWTO PREVENT IT
• The compressed air stream • Always wear certified safety
can cause soft tissue equipment: ANSI Z87.1 eye
damage to exposed skin and protection (CAN/CSA Z94.3)
can propel dirt, chips, loose with side shields when using
particles, and small objects the compressor.
at high speed, resulting in ,, Never point any nozzle or
property damage or personal sprayer toward any part of
injury, the boay 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 HOWTO PREVENT IT
,, Moving parts such asthe ,, Never operate the compressor
pulley,flywheel, and belt can with guards or covers which
cause serious _njuryif they are damaged or removed.
come intocontact with you or ,, Keep your hair, clothing, and
your clothing, 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.

• Attemptingtooperate
compressorwithdamagedor
missingpartsorattempting
torepaircompressorwith
protectiveshroudsremoved
canexpose you to moving
parts and can result in
serious injury.
WARNING: RISK OF UNSAFE OPERATION
WHAT CAN HAPPEN HOWTO PREVENT IT
Any repairs required on this
product should be performed
by a DEWALTfactory service
center or a DEWALTauthorized
service center.
Unsafe operation of your air ,, Review and understand all
compressor could lead to seri- instructions and warnings in
ous injury or death to you or this manual.
others. ,, 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 producl
, Equip a[ea Ofoperation w th a
fire extinguisher,
Do not operate machine with
missing; broken, or unauthoi
rized parts:
%
WARNING: RiSK OF FALLING
WHAT CAN HAPPEN HOWTO PREVENT iT
,, A portable compressor
can fall from a table,
workbench, or roof causing
damage to the compressor
and could result in serious
njury or death to the
operator.
• Always operate compressor
in a stable secure position to
prevent accidenta movement
of the unit. Never operate
compressor on a roof or
other elevated position. Use
additional air hose to reach
high locations.
CAUTION: RISK FROM NOISE
WHAT CAN HAPPEN HOWTO PREVENTIT
-Under some conditions and ,, Always wear certified safety
duration of use. noise from equipment: ANSI S12.6
this product may contribute (S3.19) hearing protection.
to hearing loss.
SAVE THESE INSTRUCTIONS
FOR FUTURE USE

FEATURES
ON (0/OFF SWITCH (O)
Place this switch (A) inthe ON position to provide
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.
SAFETY VALVE
If the pressure switch does not shut off the air
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 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 I E
the reserve air pressure in the tank.
OUTLET PRESSURE GAUGE
The outlet pressure gauge (C) indicates the air pressure available
at the outlet side of the regulator. This pressure 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 BODY
The universal Quick Connect body (E) accepts the three most
popular styles of Quick Connect plugs: Industrial, automotive, and
ARO.
DRAIN VALVE
The drain valve (G) is located at the base of the air
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.

MOTOROVERLOADPROTECTOR
Themotorhasanautomaticresetthermaloverloadprotector.Ifthe
motoroverheatsforanyreason,theoverloadprotectorwillshut
offthemotor.Themotormustbeallowedto cooldownbefore
restarting.Thecompressorwillautomaticallyrestartafterthemotor
cools.
INSTA££ATION
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.
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
contains a grounding pin (L). This plug
MUST be used with a grounded outlet
(K). K
IMPORTANT: The outlet being used must
be installed and grounded in accordance L
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, ff it does not fit the available
outlet, a correct outlet should be installed by a quafified electri-
cian.
•Repairs to the cord set or plug MUST be made by a quafified
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
•no longer than 50 feet
•16 gauge (AWG) or larger. (Wire size increases as gauge
number decreases. 14, 12, 10, and 8 AWG may also be used.

Voltage and Circuit Protection
Referto 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 circu# 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: ff 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.
If any of the above conditions cannot be met, or ff 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 DEWALT service center or call 1-800-4-DEWALT 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: Risk of unsafe operation. Ensure proper footing and
use caution when carrying compressor to avoid a loss of balance.
lO

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. Visually inspect air hose, replace if needed.
8. Attach hose and accessories.
WARNING: Risk of unsafe operation. Firmly grasp air hose in hand
when installing or disconnecting toprevent hose whip.
&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: 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. 11
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. Do not spray unfiltered air at an
item that could be damaged by moisture. Some air operated 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.
_, 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 (0 kPa).
&WARNING: Risk of bursting. Drain air tank daily. Water will con-
dense in air tank. ff 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
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 DEWALT factory service center or a DEWALT
authorized service center.
Maintenance Chart
Procedure Before Each Daily or after each
Use use
Check safetyvalve 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. Ifthe 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 $12.6 ($3.19) 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.
12

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.
_, CAUTION:Risk of property damage. Drain water from air tank
may contain oil and rust which can cause stains,
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.
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 DEWALT Industrial Tool Co., 701 East Joppa Road,
Baltimore, MD 21286, call 1-800-4-DEWALT (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 DEWALT factory service
center, a DEWALT authorized service center or other qualified service
personnel. Always use identical replacement parts. 13
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-DEWALT. 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-DEWALT for a free
replacement.
I_CORRECT USE CAN CAUSE XA_DS, FSLLSW THESE INSTRU_SNS_ RISK OF BUR_G, MAK_ SURE THE COMFR_SSOR OUTt F PRESSURE IS SET"
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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.
14

Troubleshooting Guide
This section provides a listof 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
Motor will not run ....................................................................................................................... 14,15,16,17,18,19
Troubleshooting Codes
CODE POSSIBLE CAUSE POSSIBLE SOLUTION
PressUre switch does n0t ShUt off m0t0r when Compressor set the on/off Switch t0 OFF, if the Unit d0eS not ShUt
reaches CUt-OUtpressure Off contact a DEWALT factory service center ora DEWALT
! authorized service Center.
2 Pressure switch cut-out too high Contact a DEWALTfactory service center or a DEWALT
authorized service center.
Tube fitt!ngs are not tight enough Tighten fittings where air Can be heaict escaP!ngl check
:fittings with soapy water solution. Do Not Overtighten,
15

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 DEWALT fact0ry Service center or a DEWALT
author zed serv ce 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 it is n0rmal for Some pressuie drop to 0CCurWhen an acCes_
use_d sory is used, adjust the iegulat0r as instiucted n RegulatOr
i uncierFeatures f pressure drop s excessve:
! NOTE:AdJust the regulated pressure under flow conditions
while accessory is being used.
8 Prolonged excessive use of air Decrease amount of air usage.
'Compressor isnot !arge enough for accessory Check the aCceSS0iY air requiremenL if it is higher than
I the CFM or pressure supplied by your air €0mpressor, a
. larger compressor is needed to operate accessory.
10 Hole in air hose Replace air hose.
11 Check valve restricted Remove; clean or replacel
12 Air leaks Tighten fittings.
13
14 Motor overload protection switch has tripped See Motor Overload under Features.
I
15 , Extension cord is wrong length or gauge Check for proper gauge wire and cord length. See
Extension Oords under lnstallationl
16

CODE POSSIBLE CAUSE POSSIBLE SOLUTION
16 Loose electrical connections Contact a DEWALT factory service center or a DEWALT
authorized service center.
Possible defective motorl ContaCt a DEWALT factoiy Service Center or a DEWALT
• authorized service center.
18 Fuse blown, circuit breaker tripped 1. Check fuse box for blown fuse and replace as necessary.
Reset circuit breaker. Do not use a fuse or circuit breaker
with higher rating than that specified for your particular
branch circuit.
2. Check for proper fuse. Use only a time delay fuse.
3. Check for low voltage conditions and/or proper extension
cord.
4. Disconnect the other electrical appliances from circuit or
operate the compressor on its own branch circuit.
i9 Tank Pressuie exceeds PiesSuie switch cut,in pressuie Motor wi!l start automatically when tank pressure dropS
: below cut,in pressure of pressure switch.
17

Cornpresseur d_air_ module D55140
A. Interrupteur Marche/Arr6t F. Soupape de s_ret6
B. Manom_tre du r6servoir d'air G. Soupape de purge du
C. Manom_tre r6gul6 r6servoir d'air
D. R6gulateur de pression H. Rembobineur de cordon
E. Branchements rapides d'alimentation
Fiche technique de la pornpe/du rnoteur
Moteur universel sans huile
AI6sage : 40 mm (1,57 po)
Course : 14 mm (0,55 po)
Tension : monophas6, 120V
Exigence minimale du circuit de d6rivation : 15 A
Type de fusible : temporisation
Fiche technique
MODELE
POIDS
HAUTEUR
LARGEUR
LONGUEUR
CAPACIT# DU R#SERVOIR D'AIR
(GALLONS)
PRESSION D'ENCLENCHEMENT
APPROX.
ENV. PRESSION DE DECLENCHEMENT
PP/MIN STANDARD _,
100 PSI (689,5 kPa)
D55140
10,9 kg (24 livres)
298,5 mm (11,75 po)
377,8 mm (14,895 po)
18,5 mm (469,9 po)
1,0 (3,8 liters)
723,9 kPa (105 PSI)
930 kPa (135 PSI)
0,7
FIG. 1
EPAS UNE
ETAPE
18

fD_finitions. lignes directrices en
rnati_re de s_curit_
Les d@finitions ci-dessous d@crivent le niveau de gravit@ pour
chaque symbole. Veuillez lire le mode d'emploi et porter une atten-
tion particuli@re& ces symboles.
&DANGER: Indique une situation dangereuse imminente quL si
elle n'est pas evit_e, causera la mort ou des blessures graves.
_AVERTISSEMENT : Indique une situation potentiellement dan-
gereuse quL si die n'est pas evit_e, pourrait se solder par un
d_ces ou des blessures graves.
_MISE EN GARDE : Indique une situation potentiellement dan-
gereuse quL si elle n'est pas evit_e pourrait se solder par des
blessures mineures ou moder_es.
MISE EN GARDE : Utilise sans le symbole d'alerte a la s6curit_,
indique une situation potentiellement dangereuse quL si die n'est
pas evit_e pourrait se solder par des dommages a la propriete.
POURTOUTESQ.U ESTIONS OU COMMENTAIRES RELATIFS(VES)
A L:OUTIL OU A PROPOS DE TOUT AUTRE OUTIL DEWALT,
COMPOSER SANS FRAIS LE : 1-800-4-DEWALT(1-800-433-9258)
Directives de s_curit_ irnportantes
_,AVERTISSEMENT :Ale pas utiliser cet appareil avant d'avoir lu
et compris le mode d'emploi ainsi que I'int#gralit# des directives de
s@curit@,d'utilisation et d'entretien.
&AVERTISSEMENT : Nertaines poussi@resproduites par les travaux
de pongage, sciage, meulage, pergage et autres peuvent contenir des
produits chimiques pouvant selon I'@tatde Californie causer le cancer,
des anomalies cong@nitalesou d'autres probl@mes lids aux fonctions
reproductrices. Voiciquelques exemples de ces produits chimiques :
•le plomb contenu clans les peintures a base de plomb; 19
* la silice cristalline provenant de la brique, du ciment et d'autres
produits de magonnerie;
oI'arsenic et chrome provenant de bois trait@chimiquement.
Les risques reli@s a I'exposition aces poussi@res varient selon la
fr@quence a laquelle I'utilisateur travaille avec ce type de mat@riaux.
Pour r@duirevotre exposition aces produits chimiques : travailler clans
un endroit bien ventil@et porter un @quipement de s@curit@approuv@
par I'OSHA/MSHAJNIOSH comme un masque anti-poussi@res
sp@cialement adapt@ ou un respirateur lots de I'utilisation de ces
outils.
Lots de I'utilisation d'outils pneumatiques, des pr@cautions de base
en mati@rede s6curit@doivent @tresuivies afin de r@duirele risque de
blessure personnelle.
_AVERTISSEMENT :ce produit contient des produits chimiques,
notamment le plomb, reconnus par I'E-tatde Califomie comme etant
cancerig@nes et pouvant entraTner des anomalies congenitales et
d'autres dangers relatifs a la reproduction, Se laver les mains apr@s
route manipulation.
CONSERVER C_S DIreCTIVeS
AAVERTISSEMENT :RISQUE D'EXPLOSION OU D'INCENDIE
CE QUI PEUT SE PRODUIRE COMMENT UB/ITER
,IIest norma que des, Faites t0uj0urs foncti0nner
Contacts@lectdquesdans !e !ec0mp[esseur dans une
moteur et le manocontacteur zone bien a@r@esans mati_re
fassent une @tinCelle: Combustible, eSsence ou
vapeur de solvanL

• Siuneetincelleelectrique • Sivousaspergezdes
provenantducompresseur mat6riauxinflammables,
entreencontactavecdes placezlecompresseur&
vapeursinflammables, aumoins6,1m(20pieds)
ellepeuts'enflammeret delazonepulv6ris6e.IIest
causerunincendieouune possiblequevousayezbesoin
explosion, d'uneIongueurdetuyau
additionnelle.
Entreposezlesmatieres
inflammablesdansun
endroits_curitaire,eloign_du
compresseur.
,,Lefaitdelimiterles • Neplacezjamaisdesobjets
ouverturesd'aerationde contrelecompresseurousur
compresseurcauseraune celui-ci.
importantesurchauffeet • Faitesfonctionnerle
pourraitcauserunincendie, compresseurdansunendroit
aereaaumolns30.5cm
(12po)dumuroude
I'obstructionqulpourraitlimiter
led_bitd'airfraisdartsles
uverturesdaeration.
oFaitesfonctionnerle
compresseurclansunendroit
propre,secetbienaer&
NepasutiliserI'appareil
I'int6rieuroudansunendroit
exigu.
2O
Lefonctionnement de ce
produit sans surveillance
pourrait se solder par des
blessures personnelles
ou des dommages a la
propri6t& Afin de reduire
le risque d'incendie, ne
pas laisser le compresseur
fonctionner sans surveillance.
• Etre toujours present Iorsque
le produit est en marche.
• Toujours d6brancher le cordon
d'alimentation en mettant
I'interrupteur marche/arr6t en
position ARRET et purger le
reservoir quotidiennement ou
apres chaque utilisation.
_DANGER : RISQUE REPIRATOIRE (ASPHYXIE)
CE QUI PEUT SE PRODUIRE COMMENT LEVlTER
o IIest dangereux de respirer •Eair qui s'ebtient directement du
I'aircomprime sortant du compresseur ne devrait jamals
compresseur. Le flux d'air
peut contenir du monoxyde
de carbone, des vapeurs
............. particules
solides provenant du r_servoir
d'air. I'inhalation de ces
_tre utilise pour alimenter I'air
destin_ & la consommation
humaine. Pour utiliser I'air
produit par le compresseur
pour la respiration, installer
correctement des filtres
contaminants peut provoquer convenables et un 6quipement
de serieuses blessures voire de s6curit6 en ligne. Les
un d6c_s, filtresen ligne et I'equipement
de s6curite utilises avec
le compresseur doivent
8tre capables de traiter I'air
conform_ment &tousles codes
Iocauxet f6d6raux en vigueur
avant toute consommation
humaine.