DeWalt D55168 User manual

iNSTRUCTiON MANUAL
GUIDE D'UTILISATION
MANUAL DE INSTRUCCIONES
tNSTRUCTIVO DE OPERACtON, CENTROS DE SERVICIO Y POLtZA
DE GARANT{A. ADVERTENClA: LEASE ESTE INSTRUCTtVO ANTES
DE USAR EL PRODUCTO.
®
D55168
Oil Free Portable Air Compressor
Compresseur d'air portatif sans huile
Compresor de aire sin aceite port_til

D55168 Air Compressor
A. On/Off Switch P Check Valve
B. Air Tank Pressure Gauge G. Safety Valve
C. Regulated Pressure Gauge H. Air Tank Drain VaLve
D. Pressure Regulator I. Pressure Switch
E. Quick Connect
Pu_p/Moter Specifications
Voltage: SingLe Phase 120V
Minimum branch circuit requirement: 15 A
Fuse Type: Time delay
Specifncations
MODEL D55168
WEIGHT 88 Ibs. (39.92 kg)
HEIGHT 41.75" (1060.5mm)
WIDTH 19.0" (4826 mm)
LENGTH 21.25 (539.8 ram)
AIRTANK CAPACITY (GALLONS) 15 Gallon (56.8 fiters)
APPROX CUT-_NPRESSURE 160 PSI (1103.2 kPa)
APPROX. CUT-OUT PRESSURE 200 PSI (1379.0 kPa)
SCFM @90 PSI (620.5 kPa_ 5._
FIG. 1
A

Definitions: Safety Guidelines
Tile 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, finer avoided, could result in death
or serious injury.
_CAUTION: Indicates a potentially hazardous
situation which, if net avoided, may result in minor
or moderate injury.
CAUTION: Used without the safety alert symbol
indicates apotentially hazardous situation which, if
net 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-BEWALT (1-800-433-9258)
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, grinding,
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 chemicals:
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
followed to reduce the risk of of personal injury
_,WARNING: This product contains chemicals, including lead,
known to the State of California 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

*Ifelectrical sparks from
compressor come into con-
tact with flammabte vapors,
they may ignite, causing fire
or explosion.
•Unattended operation of
this product could result in
personal injury or property
damage. Toreduce the risk
of fire, do not allow the
compressor to operate unat-
tended
• 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
a secure location away from
compressor.
" Always remain in attendance
with the product when it is
operating.
• Always turn off and unplug
unit when not in use.
,&DANGER: RISK TO BREATHING (ASPHYXIATIOI,,
WHAT CAN HAPPEN HOWTO PREVENT I"
n_ve
_ _ _: _fe__
_nj_i i_
• Sprayed materials such as
paint, paint solvents, paint
remover, insecticides, 'weed
killers, may contain harmful
vapors and poisons.
• Work Jnan area with good
cross ventilation. Read and
follow the safety instructions
provided on the label or safety
data sheets forthe materials
you are spraying. Always use
certified safety equipment:
OSHA/MSHAZNIOSH
respiratory protection designed
for use with your specific
application.

WHATCANHAPPEN
WARNING: RISK OF BURSTING
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. tf air tank develops
a leak, replace it immediate{y
with a new air tank or replace
the entire compressor.
,_WARNING: RISK OF ELECTRICAL SHOCK
WHAT CAN HAPPEN
• Your air compressor is
powered byelectricity.
Like any other electrically
powered device, tf it is not
used properly it may cause
electric shock.
HOWTO PREVENTIT
• Never operate the compressor
outdoors when it is raining or
in wet conditions.
, Never operate compressor
with protective covers
removed or damaged.
• 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.

• ElectricalGrounding:
Failuretoprovideadequate
groundingtothisproduct
couldresultinseriousinjury
or death from electrocution.
See Grounding
instructions under
Installation.
• Make certain that the
electrical circuit to which the
compressor isconnected
provides proper electrical
grounding, correct voltage and
adequate fuse protection.
,&WARNING: RISK FROM FLYING OBJECTS
WHAT CAN HAPPEN H_WTO PREVENTIT
_&WARNING: RISK OF HOT SURFACES
WHAT CAN HAPPEN HOWTO PREVENT IT
. 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 coot
._WARNING: RISK FROM MOVING PARTS
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.

•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.
,&WARNING: RISK OF UNSAFE OPERATION
• Any repairs required on this
product should be performed
by a DEWALTfactory service
center or a DEWALT authorized
service center.
WHAT CAN HAPPEN HOWTO PREVENTIT
%
,&WARNING: RISK OF FALLING
WHAT CAN HAPPEN HOWTO PREVENTIT
• 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
,& CAUTION: RISK FROM NOISE
WHAT CAN HAPPEN HOW TO PREVENT IT
SAVE THESE INSTRUCTIONS
FOR FUTURE USE

FEATURES
ON!OFF SWITCH
Place this switch (A) in the 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 (I) 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) witl 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 (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 the
reserve air pressure in the tank.
OUTLET PRESSURE GAUGE
The outlet pressure gauge (C) indicates
the air pressure available at the outtet
side of the regulator. This pressure is
controlled by the regulator and is always
tess than or equat to the tank pressure.
REGULATOR
The regulator (D) controls the air pressure shown on the outlet
pressure gauge. Putt 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
ARC. One hand push-to-connect operation makes connections
simpte and easy.
DRAIN VALVE
The drain valve (H) is tocated 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 H
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
availaMe until the compressor has raised the air tank pressure
above that required at the air outlet.
PRESSURE RELEASE VALVE
The pressure release valve iocated on the side of the pressure
switch, is designed to automatically release compressed air from
the compressor head and the outtet tube when the air compressor
reaches "cut-out" pressure or is shut off. The pressure release valve
atlows the motor to restart freely. When the motor stops running,
air will be heard escaping from this valve for a few seconds. No air
should be heard leaking when the motor is running or after the unit
reaches "cut-out" pressure.

MOTOROVERLOADPROTECTOR
Themotorhasamanualthermaloverloadprotector.Ifthemotor
overheatsforanyreason,theoverloadprotectorwillshutoffthe
motor.Themotormustbeailowedtocooldownbeforerestarting.
Torestart:
1.SettheOn/Auto/OfflevertoOFFandunplugunit.
2.Allowthemotortocoot.
3.Plugthepowercordintothecorrectbranchcircuitreceptacle.
4.SettheOn/Auto/OfflevertoON/AUTOposition.
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 O PSI (OkPa).
2. Grasp the hose at the Quick Connect plug and push the plug
into the Quick Connect body (E). Coupler will snap intoplace.
3 Grasp the hose and pull to ensure coupier 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 O PSI (OkPa).
2. Pull coupler on Quick Connect body back to reIease 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. 9
The portable air compressor is equipped with a cord having a
grounding wire with an appropriate grounding plug.
1. The cord set and plug (M)with this unit i-#T',
contains a grounding pin (L). This plug M
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. Ifthese 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 tN ELECTRICAL SHOCK.
Do not modify the plug provided, ff it does not fit the available
outlet, a correct outlet should be instafled by a qualified
electrician.
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 wilt accept the plug on
the product

* ingoodcondition
* nolongerthan50feet
. 12gauge(AWG)orlarger.(Wiresizeincreasesasgaugenum-
berdecreases.10AWGand8AWGmayalsobeused.DONOT
USE14OR16AWG.)
CAUTION: 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.
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 compty 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.
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 tt is not necessary
to change the cord set.
Compatibility
NOTE: Always use an air _ine filter to remove moisture when
spraying paint.
Location
Ptace the air compressor in a clean, dry and v!eli ventilated area
at least 12" (30 mm) away from the wail 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.
_i_WARNING: 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 fiat surface resting on the rubber
feet.
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., make
sure the tank is drained and the unit is secured with straps to prevent
tipping. Use care when driving to prevent tipping the unit over in the
vehicle. Damage can occur to the compressor or surrounding items
if the compressor is tipped.
10

LIFTING
Always use two people when lifting and liftfrom
the recommended lift points (O). DO NOT lift
by wheels or shroud.
Moving
_CAUTION: The wheels and handle do
not provide adequate clearance, stabitity, or
support for pulling the unit up and down stairs
or steps. The unit must be lifted or pushed up
a ramp.
1. Grasp handle of compressor and tilt compressor back to rest on
wheels.
_2_WARNING: Risk of Unsafe Operation. Ensure proper footing and
use caution when roiling compressor so that unit does net tip or
cause loss of balance.
2 When location is reached slowly lower compressor to ground.
Always store compressor in a vertical position resting on the
rubber bumpers and wheels.
PREPARATION FOR USE
Pre=Start Checklist (Fig. I)
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. Pull the knob (D) 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.
7. Attach hose and accessories
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 tools and
accessories may require filtered ai_ Read the instructions for the air
tools and 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.
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 ff
the following break-in instructions are not closely fellowed.
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, pulI 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.
11

3. Open the drain valve (turn lever counter-clockwise) fuIly 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 lever
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. I)
1. Follow Pre-Start Checklist under Preparation for Use.
2. Move the On/Off switch to the ON position and allow tank
pressure 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 eft mist. Do not spray until-
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.
3. Adjust regulator (D) to desired setting. See Regulator under
Features.
Shut-down (Fig. I)
1. Move On/Off switch (A) to 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 OPSi (0 kPa).
_t,WARNING: Risk of bursting. Drain air tank daily. Water will
condense in air tank. If net drained, water will corrode and weaken
the air tank causing a risk of air tank rupture.
5. Allow the compressor to coot 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 coot 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 federat taws 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 shoutd
be performed by a DEWALT factory service center or a DEWALT
authorized service center
12

Maintenance Chart
3efore Daily Every
or after
_ach each 100 Yearly
_se use hours
Check Safety Valve •
Drain Tank O
Air Filter O _
Air compressor pump intake
and exhaust valves O
1- more frequent in dusty or humid conditions
Checking Safety Valve
_&WARNING: Risk of bursting. If the safety valve does not work
propedy_ over-pressurization may occu_ 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. NOTE: Ring may
be difficult to pull when air tank pressure is at 0 PSI (0 kPa). tf 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. 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. _,WARNING: Risk from noise. Use ANSI S 12.6 ($3. f g) 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,
13
dryers). This condensate contains lubricating oit 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)
CAUTION: Risk of Property Damage. Drain water from air tank may
contain off and rust which can cause stains.
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.
Checking Air Filter Element (Fig. 1)
_WARNINO: Hot surfaces. Risk of burn. Outlet tube pump head_
and surrounding parts are very hot, do not touch (see the Hot
Surfaces identified in Fig. 2). Allow compressor to cool prior to
servicing.
1. Ensure ON/OFF switch (A) is in the OFF Position.
2. Allow unit to cool.
3. Remove filter cover (N) from base.
4. Remove etement from filter base...
5. Place new element back in filter
base. Purchase replacement parts
from your Iocai dealer or authorized
service center. Always use identical
replacement parts

6.Snapfiltercovertofilterbase.
_,CAUTION:Risk of unsafe operation. Do not operate without air
inlet filter
AIR COMPRESSOR PUMP INTAKE AND
EXHAUST VALVES
Once a year have a Trained Service Technician check the air
compressor pump intake and exhaust valves.
ACCESSORIES
Recommended accessories for use with your toot 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 Toot Co., 701 East Joppa Road,
BaItimore_ MD 21286_ call 1-800-4-DEWALT (1-800-433-9258) or visit
our website wvTw.dewaIt.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 catls:
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.
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,
calt 1-80O-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, calt 1-8O0-4-DEWALT for a free
replacement.
14

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.
kPa (kilopaseal): Metric pressure measurement. 1 kilepascaI equal 1000 pascaIs.
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 Undepwriters 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 acertain tow
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, tt 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 panet 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.
15

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 .............................................. 8,9,10,11,12,23
Regulator knob has continuous air leak .................................................................................... 13
Regulator will not shut off air outlet ........................................................................................... 13
Motor will not run ....................................................................................................................... 6,14,15,16,17,18,19,26,21
Squealing Sound ....................................................................................................................... 22
Troubleshootin( Codes
CODE POSSIBLE CAUSE
Pressure switch cut-out too high
POSSIBLE SOLUTION
Contact a DEWALT factory service center or a DEWALT
authorized service center.
16

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.
6 Defective safety valve Operate safety valve manually by pulling on ring. tf vatve still
leaks, it must be replaced.
8Prolonged excessive use of air
Hole in air hose10
Decrease amount of air usage•
Replace air hose.
12 Air leaks Tighten fittings.
14 Motor overload protection switch has tripped Refer to Motor Overload Protection under Features.
17

CODE POSSIBLE CAUSE POSSIBLE SOLUTION
16 Extension cord iswrong tength or gauge Checkforpropergaugewireandcordlength under Extension
Cords
i
18
ii_iiiiiiiiiiiiiiiiiiiii _i_iii
2O
iiiiiii
22
Possible defective motor
Pressure release valve on pressure switch has not
unloaded head pressure
Worn Belt
Contact a DEWALT factory service center or a DEWALT
authorized service center.
Bleed the line by pushing the lever on the pressure switch to
the "0" position; if the valve does not open, replace switch,
_iiiiiiiiiiiiiiiiiiiiiiiii_i_
Contact a DEWALT factory service center or a DEWALT
authorized service center.
18

Compresseur d'aJr, modelo D55168
A. Interrupteur Marche/ArrGt
B. Manometre du reservoir d'air
C Manometre regul6
D. Regutateur de pression
E. Branchements rapides
E Ctapet
G. Soupape de sQrete
H. Soupape de purge du
reservoir d'air
I. Rembobineur de cordon
d'alimentation
Fiche technique de la pompe/du moteur
Tension : monophasG, 120V
Exigence minimaLe du circuit de derivation : 15 A
Type de fusible : tempodsation
Fiche technique
MOD#LE D55168
POIDS 39,92 kg (88 Iivres)
HAUTEUR 1080.5, ram(41,75 po)
LARGEUR
LONGUEUR
CAPACITE DU RESERVOIR D'AIR
(GALLONS)
PRESSION D'ENCLENCHEMENT
APPROX.
ENV. PRESSION DE DECLENCHEMENT
PCMS (SCFM) 100 PSI (689,5 kPa)
482,6 mm (19,0 po)
21,25 mm (536_8 po)
15 (56,8 iiters)
11032 kPa (160 PSI)
t379_0 kPa (200 PSi)
5,_
FIG. 1
A
G
19

DermitNons : lignes directrNces en
rnat_ere de securite
Les definitions ci-dessous decdvent le niveau de gravite pour
chaque symbole. Veuillez lire le mode d'empIoi et porter une atten-
tion particuticre aces symbotes.
&DANGER : Indique une situation dangereuse imminente quL si
elle n'est pas _vit_e, caueera la mort ou des bleasures graves.
_,AVERTISSEMENT : lndique une situation potentie/lement dan-
gereuse quL si die n'est pas _vitee, pourrsit se solder par un
deeea ou dee blesaurea graves.
_,MISE EN GARDE : Indique une situation potentie/lement dan-
gereuse qua.si elle n'est pas _vit_e pourrait se solder par des
bleeeurea mineurea ou moderees.
MISE EN GARDE : Utilis_ sans le symbole d'alerte _la s_eurit_,
indique une situation potentiellement dangereuse qua.si e/le n'eat
pas _vit_e pourrait se solder par des dommagea b la propriete.
POURTOUTES QUESTIONS OU COMMENTAIRES RELATtFS(MES)
_OUTtL OU Jk PROPOS DE TOUT AUTRE OUTIL DEWALT_
COMPOSER SANS FRAIS LE : 1-800..4-DEWALT (1=800-433-9258)
Directives de securite irnportantes
_,AVERT/SSEMENT : Ne pas utiliser cet appareil avant d'avoir lu
et oompris le mode d'emploi ainsi que I'int_gra/it& des directives de
s#curit_, d'utilisation et d'entretien.
,_,AVERTISSEMENT : Nertaines poussi&res produites par les travaux
de pon_age, soiage, meu/age, per9age et autres peuvent eontenir des
produits ohimiques pouvant (selon /'_tat de Californie) causer/e cancer,
des anomalies eong_nita/es ou d'autres probl&mes /i_s aux fonctions
reproductrioes. Voici que/ques exemp/es de ees produits ohimiques :
•le plomb contenu dane les peintures _base de plomb;
•la silice cristalline provenant de la brique, du ciment et d'autres
produits de ma_onnerie;
•/'arsenic et chrome provenant de bois trait# chimiquement.
Les risques reli#s _/'exposition _ces poussi&res varient selon la
fr&quenee _laquelle I'utilisateur travaille avec ee type de mat&riaux.
Pour r&duire votre exposition _ces produits chimiques : travailler darts
un endroit bien ventil& et porter un &quipement de s&curit& approuv&
par IOSHA/MSHA/NIOSH eomme un masque anti-poussi&res
sp_cialement adapt& ou un respirateur /ors de I'utilisation de ces outils.
Lots de l'utilisation d'outils pneumatiques, des precautions de base
en mati&re de s&curit# doivent _tre suivies afin de r&duire le risque de
blessure personnelle.
_t,AVERTISSEMENT : Ce produit contient des produita chimiques,
notamment le plomb, reconnus par t'Etat de Califomie comme
etant caneerigenes et pouvant entrainer des anomalies conge-
nitales et d'autres dangers relatifs a ta reproduction. Se laver lee
mains apres toute manipulation.
CONSERVER CES DIRECTIVES
_DANGER : RISOUE D'EXPLOSION OU D'INCENDIE
CE QUI PEUT SE PRODUIRE COMMENT L'EVITER
2O