DeWalt D55371 User manual

D55371
Portable Air Compressor with sealed lube pump
Compresseur d’air portatif avec la pompe scellée et lubrifiée
Compresor de aire con la bomba sellada de lubricación
INSTRUCTION MANUAL
GUIDE D'UTILISATION
MANUAL DE INSTRUCCIONES
INSTRUCTIVO DE OPERACIÓN, CENTROS DE SERVICIOY PÓLIZA
DEGARANTÍA.ADVERTENCIA: LÉASEESTEINSTRUCTIVOANTES
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-De

2

A. Sliding Handles
B. Drain Valve
C. Storage Support
D. Regulated Pressure Gauge
E. Quick Connects
F. Regulator
G. Safety Valve

Voltage: Single Phase 120V/240V
Minimum branch circuit requirement: 15 A
Fuse Type: Time delay

MODEL D55371
WEIGHT 128 lbs. (58 kg)
HEIGHT 18.0" (457.2 mm)
WIDTH 24.0" (609.6 mm)
LENGTH 33.0" (838.2 mm)
AIRTANK CAPACITY 7.5 Gallon (28.4 liters)
APPROX CUT-IN PRESSURE
145 psi
APPROX. CUT-OUT PRESSURE
175 psi
APPROX. PILOT VALVE RESET 145 psi
APPROX. PILOT VALVE BLOW OFF
160 psi
SCFM @ 100 psi 4.6 *
NOISE LEVEL 75 dBA +
*Tested per ISO 1217
+Tested per ISO 3744

H. Pressure Switch
I. Cord Wrap
J. Air Filter
K. Tank Pressure Gauge
L. Auto(–)/Off(O) Switch
M. Pilot Valve
N. Dual Voltage Control


Noise EmissionValues
Sound Pressure Level: LpA = 75.0 dBA re 20μPA
Uncertainty in the Sound Pressure Level: KpA = 3.0 dBA re 20μPA
Sound Power Level: LwA = 88.5 dBA re 1 pw
Uncertainty in the Sound Power Level: KwA = 3.0 dBA re 1 pw
The sum of the emission value and the uncertainty is the limit
below which there is a 95% confidence the value of a single tool
will lie below when the tool is new.
FIG. 1
E
A
F
L
H
I
D
K
C
B
G
J
M
N

3
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
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 situa-
tion which, if not avoided, will result in death or seri-
ous 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:
1-800-4-D
e WALT (1-800-433-9258)

WARNING:Do not operate this unit until you read and understand
this instruction manual for safety, operation and maintenance
instructions.
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.

DANGER: RISK OF EXPLOSION OR FIRE
WHAT CAN HAPPEN HOWTO PREVENT IT
 • Itisnormalforelectrical
contacts 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mate-
rials, locate compressor
at least 20' (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.

4

 • 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
pump.
 • 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
unattended.
 • Alwaysremaininattendance
with the product when it is
operating.
 • Always turn off and unplug
unit when not in use.
DANGER: RISKTO BREATHING (ASPHYXIATION)
WHAT CAN HAPPEN HOWTO 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.

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WARNING: RISK OF BURSTING
Air Tank: On February 26, 2002, the U.S. Consumer Product
Safety Commission published Release # 02-108 concerning air
compressor tank safety:
Air compressor receiver tanks do not have an infinite life.Tank life
is dependent upon several factors, some of which include 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 HOWTO 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manu-
facturers recommendation
and never exceed the maxi-
mum allowable pressure rat-
ing of attachments. Never
use compressor to inflate
smalllowpressureobjects
such as children’s toys, foot-
balls, basketballs, etc.

6
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Tires:
• Over inflation of tires could
resultinseriousinjuryand
property damage.
 • Useatirepressuregaugeto
check the tires pressure before
each use and while inflating
tires; see the tire sidewall for
the correct tire pressure.
NOTE: Air tanks, compressors
and similar equipment used to
inflate tires can fill small tires
veryrapidly.Adjustpressure
regulator on air supply to no
more than the rating of the tire
pressure. Add air in small incre-
ments and frequently use the tire
gauge to prevent over inflation.
WARNING: RISK OF ELECTRICAL SHOCK
WHAT CAN HAPPEN HOWTO 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.
 • 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 HOWTO 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.

7

• 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 HOWTO 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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.

8

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
injuryordeathtothe
operator.
• Alwaysoperatecompressor
in a stable secure position to
prevent accidental movement
of the unit. Never operate
compressor on a roof or
other elevated position.Use
additional air hose to reach
high locations.
WARNING: RISK OF INJURY FROM LIFTING
WHAT CAN HAPPEN HOWTO 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 HOWTO PREVENT IT
 • Under some conditions and
duration of use, noise from
this product may contribute
to hearing loss.
 • Alwayswearcertifiedsafety
equipment: ANSI S12.6
(S3.19) hearing protection.
WARNING: RISK OF UNSAFE OPERATION
WHAT CAN HAPPEN HOWTO PREVENT IT
• Unsafeoperationofyourair
compressorcouldleadtoseri-
ousinjuryordeathtoyouor
others.
• Reviewandunderstandall
instructions and warnings in
this manual.
• Becomefamiliarwiththe
operation and controls of the
air compressor.
• Keepoperatingareaclear
of all persons, pets, and
obstacles.
• Keepchildrenawayfromthe
air compressor at all times.
• Donotoperatetheproduct
when fatigued or under the
influence of alcohol or drugs.
Stay alert at all times.
• Neverdefeatthesafetyfea
tures of this product.
• Equipareaofoperationwith
a fire extinguisher.
• Donotoperatemachinewith
missing, broken, or unautho-
rized parts.
• Neverstandonthe
compressor.

9



)
AUTO(–)/OFF(O) SWITCH
Place this switch (L) in the AUTO(–)
L
H
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 (L) is in the
OFF(O) position before removing or
replacing pressure switch cover.
PRESSURE SWITCH
The pressure switch (H) 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
G
compressor at its cut-out pressure setting, the
safety valve (G) will protect against high pressure
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 (K) indi- E
FD
K
cates the reserve air pressure in
the tank.
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 than or equal to the tank pressure.
REGULATOR
The regulator (F) controls the air pressure shown on the regulated
pressure gauge. Pull the knob out and turn clockwise to increase
pressure and counterclockwise to decrease pressure. When the
desired pressure is reached push knob in to lock in place.
UNIVERSAL QUICK CONNECT BODIES
The universal quick connect body (E) 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.The two quick connect bodies allow the use of two tools at the
same time.
DRAIN VALVE
Thedrainvalve(B) islocatedatthebaseof
B
the air tank and is used to drain
condensation at the end of each use.
See
Draining AirTank 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.

10

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.
AIR INTAKE FILTER
The filter (J) is designed to clean air entering the
J
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.
MOTOR OVERLOAD PROTECTOR
The motor has a thermal overload protector. If R
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 (R) on the motor.
4. Plug the power cord into the correct branch circuit receptacle.
5. Set the Auto/Off switch to AUTO(–) position.
DUAL CONTROL
Dual control allows the compressor to operate in the M
constant run or the stop/start mode of operation.The
pilot valve (M) is used to control the compressor when
operating in the constant run mode. The pressure
switch is used to control the compressor when
operating in the stop/start mode. The mode of
operation is determined by the amount of time the compressor will be
required to supply air. If the demand for air is infrequent, then the unit
should be operated in the stop/start mode to minimize unnecessary
run time and to save energy.If there is a frequent or extended demand
for air, and/or the unit is located in a remote area where access to the
compressor is difficult, the unit should be operated in the constant run
mode to minimize the number of times the motor must start in an hour
to ensure good motor life.
DUAL VOLTAGE
The dual voltage (N) feature allows the N
compressor to operate in 115 or 230 volt
operation.The advantage of running in the 230
volt operation is a lower current draw. Lower
current draw may be necessary in areas with a
poor power source.Lower current also reduces
operating costs. See 230 Volt Conversion
under Installation.
PILOT VALVE
When the maximum air tank pressure is obtained, the pilot valve
(M) will blow-off.


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. 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.

11

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. Push coupler on quick connect body back to release quick
connect plug on hose.

To operate the compressor at 230 volts replace the
115 volt plug supplied on the motor cord with a
UL/CSA listed plug suitable for 230 volts and the
rated amps of the compressor, see Motor
Specifications at the beginning of this manual. A 230
volt plug as shown in the diagram may be purchased
at a local hardware or electrical supply store.
1. Follow the plug manufacturer installation
procedures, contact a qualified electrician, a D
e WALT service
center or call 1-800-4-D
e WALT (1-800-433-9258) for assistance.
IMPORTANT: The compressor must comply with all local and
national electrical codes after the 230 volt plug is installed.
WARNING: Ensure the 230 volt cord plug end is properly
connected before operating in 230 volt mode.
2. Remove the pinonthe115/230dualvoltage N
control switch.
3. Move the 115/230 dual voltage control
switch (N) to the 230 volt position.
4. Replace the pin.
CAUTION: Oncetheunithasbeenconverted
to 230 volts the 115/230 dual control switch
can not be placed in the 115 volt position until
the cord plug is replaced with a UL/CSA listed cord plug suitable
for 115 volts and the rated amps of the compressor, See Motor
Specifications.
WARNING: Do not operate this unit until you read and understand
this instruction manual for safety, operation and maintenance
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 (P) with this unit
Q
115VPO
contains a grounding pin (Q).This plug
MUST be used with a grounded
outlet (O).
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 230V O
P
Q
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.

12

•Do not modify the plug provided. If it does not fit the available
outlet, a correct outlet should be installed by a qualified
electrician.
•Repairs to the cord set or plug MUST be made by a qualified
electrician.

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'(15.2m)
 • 12gauge(AWG)orlarger.(Wiresizeincreasesasgaugenum-
ber 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.

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.

NOTE: Always use an air line filter to remove moisture and oil vapor
when spraying paint.

Place the air compressor in a clean, dry and well ventilated area
at least 12" (30.5 cm) 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.
WARNING: The air compressor pump and shroud are designed
to allow for proper cooling. The ventilation openings on the com-
pressor 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 wheels
and rubber foot.
ELECTRICAL
Refer to all safety instructions before using unit. Observe extension
cord safety instructions, if necessary. Always move the Auto/Off
switch (L) to the OFF(O) position before removing the plug from the
outlet.

13


When transporting the compressor in a vehicle,
A
C
trailer, etc.ensure that the air tank is drained and
the unit is secured and placed on a flat horizontal
surface. Use care when driving so to avoid
tipping the unit over in the vehicle. Damage can
occur to the unit or surrounding items if unit is
tipped. Store compressor in a vertical or horzitional position.
LIFTING
Always use two people when lifting and lift from the recommended
lift points A and C.
MOVING
1. Support compressor and pull handle (A) until fully extended
(lock position).
AA
WARNING: Risk of unsafe operation. Ensure proper footing and
use caution when rolling compressor so that unit does not tip or
cause loss of balance.
2.To move, roll compressor on tires using handle (A) as shown.

WARNING: Do notoperate this unit until youreadandunderstand this
instruction manual for safety, operation and maintenance instructions.

1. Ensure the Auto/Off switch (L) is in the OFF(O) 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 (
B ) is closed.
5. Ensure safety valve (
G ) is functioning properly, see Checking
Safety Valve under Maintenance.
6. Pull the regulator knob (F) out and turn counterclockwise until
fully closed.Ensure regulated pressure gauge reads 0 psi.Push
knob in to lock in place.
7. Attach hose and accessories. NOTE: Always use a minimum
3/8" (9.5 mm) or greater air hose rated at 300 psi.
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.
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.


WARNING: Hot surfaces. Risk of burn. Aftercooler, pump head,
and surrounding parts are very hot, do not touch. Allow compressor
to cool prior to servicing.
WARNING: Risk of moving parts. 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.

14

CAUTION: Risk of unsafe operation. Do not operate in vertical
position.Verticalpositionisforstorageonly.
CAUTION: Risk of unsafe operation.Compressed air from the unit
may contain water condensation and oil mist. Do not spray unfil-
tered air at an item that could be damaged by moisture. Some air
operated tools or devices may require filtered air. Read the instruc-
tions for the air tool or device
1. Follow Pre-Start Checklist under Preparation for Use.
2. Move the Auto/Off switch to the AUTO(–) position.
3. Select Stop Start Mode or Constant Run Mode. See Dual
Control under Features for description:
STOP START MODE
a. Turn knob on top of pilot valve (M) clockwise until fully
closed.
WARNING:Riskofpropertydamage.OvertighteningthePilotValve
knob can cause damage to the pilot valve.
b. Allow compressor to reach cut-out pressure. If compressor
does not stop, contact a D
e WALT service center or call
1-800-4-D
e WALT (1-800-433-9258) for assistance.
CONSTANT RUN MODE
a.Turn knob on top of pilot valve (M) fully counterclockwise until
fully open.
WARNING: Risk of property damage.Over loosening the pilot valve
knob can cause damage to the pilot valve.
b. The compressor is now in constant run mode.NOTE: After the
compressor reaches blow-off pressure the unit will continue
to run but will not build additional tank pressure until the air is
used and the pilot valve reset pressure is reached.A slight air
noise may be heard while the air is being unloaded through
the pump head. If compressor shuts off, contact a D
e WALT
service center or call 1-800-4-D
e WALT (1-800-433-9258) for
assistance.
NOTE: For proper operation the pilot valve blow-off pressure must be
below the pressure switch cut out pressure.
 4.Adjust regulator (F) to desired setting. See Regulator under
Features.

1. Move Auto/Off switch (L) to the OFF(O) position. NOTE: If
finished using compressor, follow Steps 2–6. NOTE: If operating in
the constant run mode turn pilot valve knob clockwise until it stops
before moving the Auto/Off switch (L) to the OFF(O) position.
2. Pull the regulator knob (F) 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.

The following procedures must be followed when maintenance or
service is performed on the air compressor.
1. Ensure Auto/Off (L) switch is in the OFF(O) position.
2. Remove air compressor plug from outlet.

15

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.

Procedure Daily Weekly See tank
warning label
Check safety valve X
Inspect air filter X
Drain air tank X
Check for unusual noise/vibration X
Check for air leaks X
1
Clean compressor exterior X
Remove tank from service X2
1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.
2 - For more information, call 1-800-4-DeWALT (1-800-433-9258)

WARNING: Risk of bursting. If the safety valve does not work
properly, over-pressurization may occur, causing air tank rupture or
an explosion.
WARNING: Risk from flying objects. Always wear certified safety
equipment: ANSI Z87.1 eye protection (CAN/CSA Z94.3) with side
shields when using the compressor.
Before starting compressor, pull the ring on the safety valve to
make sure that the safety valve operates freely. NOTE: Ring may
be difficult to pull when air tank pressure is at 0 psi. If the valve is
stuck or does not operate smoothly, it must be replaced with the
same type of valve.

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 eye protection [ANSI Z87.1 (CAN/CSA Z94.3)]
when draining as debris can be kicked up into face.
WARNING: Risk from noise. Use ear protection [ANSI S12.6
(S3.19)] as air flow noise is loud when draining.
NOTE: All compressed air systems generate 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 Auto/Off switch is in the OFF(O) position.
2. Lift compressor into an inclined position so drain valve (B) 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 lever on drain valve.
5. Slowly rotate lever to gradually bleed air from air tank.
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.

16

NOTICE: 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, rotate valve to the
fully open position.
7. Close drain valve when finished.

WARNING: Hot surfaces. Risk of burn. Outlet tube, pump head,
and surrounding parts are very hot, do not touch. Allow compressor
to cool prior to servicing.
1. Ensure Auto/Off switch (L) is in the OFF(O) Position.
2. Allow unit to cool.
3. Remove filter cover (J) from filter base.
J
4. Remove element from filter base.
5. Place new elementback in filterbase.Purchase
replacement parts from your local dealer or
authorized service center. Always use identical
replacement parts.
6. Snap filter cover to filter base.
NOTICE: Risk of property damage. Do not operate without air
inlet filter

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.
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.

Please have the following information available for all service calls:
Model Number ____________ Serial Number _________________
Date and Place of Purchase ______________________________

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.

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 (1-800-433-9258).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.

17

FREE WARNING LABEL REPLACEMENT: If your warning
labels become illegible or are missing, call 1-800-4-D
e WALT
(1-800-433-9258) for a free replacement.
WARNING
DRAIN T ANK DAI LY OR AFTER EVERY 4 HOURS OF US E. C ONDENSATION BUILD-UP M A Y CAUSE
CORROSION INSIDE TANK RESULTING INT ANK F A I L URE. SEEM A NUAL FOR INSPECTION PROCEDURES.
TO DRAINT ANK OPEN V A LVE S L OWL Y AND TIL T COMPRESSORTO EMPTYACCUMUL ATED W A TER.
ADVERTENCIA
DRENE ELTANQUE A DIARIO O DESPUÉS DE CADA4 HO RAS DE USO.LA ACUMULACIÓN DE
CONDENSACIÓN PUEDE OCASIONAR CORROSIÓN DENTR O DEL T ANQUE Y P R OVOCAR FALLA DEL
TANQUE. C ONSULTE EL M A NUAL P A RA CONOCER LOS PROCEDIMIENTOS DE INSPECCIÓN. P A RA DRENAR EL TANQUE, ABRA LA
V Á LVULA LENT A MENTE E INCLINE EL COMPRESOR P A RAELIMINAR EL AGUA ACUMULADA.
A V ERTISSEMENT
RÉSERVOIR DE VIDANGE QU OTIDIEN OU APRÈST OUTES LES 4 HEURES D'UTILISATION.
L'HABILLAGE DE CONDENSATION PEUT CAUSER LA CORROSION À L'INTÉRIEUR DU RÉSERVOIR A Y ANT
POUR RÉSUL T A T L'ÉCHEC DE RÉSERVOIR. VOIR LE MANUEL POUR DES PROCÉDURES D'INSPECTION. À LA V A L V E
OUVERTE DE RÉSERVOIR DE VIDANGE LENTEMENT ET AU COMPRESSEUR D'INCLINAISON ÀL ' E A U AC CUMULÉE VIDE.
WARNING HOT SURFA CES
ADVERTENCIA SUPERFICIESCALIENTES
A V ERTISSEMENT SURFA CES CHAUDES
DO N OT O PERATE IN U PRIGH T
PO SI TION. U PRIG HT POSI TION
IS F OR S TORAG E ONL Y .
NO OPE RE LA HE RRAMI EN TA E N
POSI CIÓN V ERTIC AL . SÓLO
ALMA CENE E N EST A PO SI CIÓ N.
NE P A S F A IRE F ONCT IONNER EN P OSIT ION
VERTICA LE. LA P OSITION V ERTI CALE ES T
RÉSE RVÉE A U STOCK AG E UNIQ UEMEN T.
ATTENTION DO NOT ADJUSTF ACTORY S E TTINGS.
TO REDUCE RISK OF ELE CTRIC SHOCK
DO NOT REMOVE COVER.
Pr essure c o ntrols set a t fact ory for
maximum sa fe operation.
NO HAGA CAMBI OS ENLO S AJUS TES
DE FÁBRICA. N O RETIRE LAT A P A P A R A
REDU CIR EL R IESG O DE CHOQ UE ELÉ CTRICO .
Los c o ntrol es de presi ón se aj usta n en la
fáb rica p ara máx ima segu ridad e n la ope raci ón.
ADVERTENCIA
WARNING
A V ERTISSEMENT

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 Standards for Safety.
*UL®is a registered trademark of Underwriters Laboratories and
ETL®is a registered trademark of Electrical Testing Laboratories.
PilotValve Blow-Off Pressure: Continuous running units are con-
trolled by air tank pressure. When the maximum air tank pressure
is obtained, the pilot valve will blow-off.This decreases the load on
the motor and allows it to run at a near no-load condition. NOTE:
For proper operation the pilot valve blow-off pressure must be below
the pressure switch cut-out pressure.
Pilot Valve Reset Pressure: When the air tank pressure drops to
a predetermined point, the pilot valve closes.The air tank pressure
will now increase until it reaches the pilot valve blow-off pressure.
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.

18


Thissectionprovidesalist of themore frequentlyencounteredmalfunctions,theircausesand correctiveactions.Theoperatorormaintenance
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..........................................................................................................................11
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, 21, 23
Regulator knob has continuous air leak....................................................................................13
Regulator will not shut off air outlet...........................................................................................13
Motor will not run.......................................................................................................................11, 14, 15, 16, 17, 18, 19, 20, 24
Motor shuts off when operating in constant run mode..............................................................22, 25
Continuous air leak at pressure relief tube................................................................................26, 27

CODE POSSIBLE CAUSE POSSIBLE SOLUTION
1 Pressure switch does not shut off motor when com-
pressor reaches cut-out pressure
Pilot valve does not release pressure when air tank
reaches blow-off pressure
Set the Auto/Off switch to OFF(O), if the unit does not shut off
contact a D e WALT factory service center or a D e WALT authorized
service center.
Pilot valve must be replaced.
2 Pressure switch cut-out too high Contact a D
e WALT factory service center or a D e WALT autho-
rized service center.
3 Tube fittings are not tight enough Tighten fittings where air can be heard escaping. Check fittings
with soapy water solution. Do Not Overtighten.

19

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 autho-
rized 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 accessory 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 com-
pressor 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.
14 Motor overload protection switch has tripped Refer to Motor Overload Protection under Features. If motor
overload protection trips frequently, contact a D
e WALT factory
service center or a D
e WALT authorized service center.

20
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CODE POSSIBLE CAUSE POSSIBLE SOLUTION
15 Tank pressure exceeds pressure switch cut-in
pressure Motor will start automatically when tank pressure drops below cut-in pressure of pressure switch.
16 Extension cord is wrong length or gauge Check for proper gauge wire and cord length. Refer to the
Extension Cords paragraph in the Installation section.
17 Loose electrical connections Contact a D
e WALT factory service center or a D e WALT autho-
rized service center.
18 Possible defective motor Contact a D e WALT factory service center or a D e WALT autho-
rized service center.
19 Paint spray on internal motor parts Contact a D
e WALT factory service center or a D e WALT authorized
service center. Do not operate the compressor in the paint spray
area. See flammable vapor warning.
20 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 our particular branch cir-
cuit.
2. Check for proper fuse.You should use a time delay fuse.
3. Check for low voltage conditions and/or proper extension
cord.
4. Disconnect the other electrical appliances from circuit or oper-
ate the compressor on its own branch circuit.
21 Restricted air intake filter Clean or replace air intake filter. Do not operate the air
compressor with the filter removed. Refer to the Air Filter
paragraph in the Maintenance section.
22 Defective pilot valve Replace pilot valve. Contact a DeWALT factory service center or a
DeWALT authorized service center.