DeWalt DXCMH9919910-CA User manual

DXCMH9919910
Two Stage, Belt Drive, Electric Air Compressors
Compresseurs d’air électriques à un étage à entraînement par courroie
Compresores eléctricos de aire, de una sola etapa y accionamiento por correa
INSTRUCTION MANUAL
GUIDE D'UTILISATION
MANUAL DE INSTRUCCIONES
INSTRUCTIVO DE OPERACIÓN, CENTROS DE SERVICIO Y
PÓLIZA DE GARANTÍA. ADVERNTENCIA: LÉASE ESTE
INSTRUCTIVO ANTES DE USAR EL PRODUCTO.
If you have questions or comments, contact us.
Pour toute question ou tout commentaire, nous contacter.
Si tiene dudas o comentarios, contáctenos.
1-888-895-4549 • www.dewalt.com
MAT Industries, LLC, Long Grove, IL 60047
(DEC19) Part No. 200-2943-D DXCMH9919910 Copyright ©2013 - 2019 DEWALT

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Air Compressor
A. Pump Air Intake Filter
B. Auto(-)/Off(O) Switch
C. Air Tank Pressure Gauge
D. Air Outlet
E. Safety Valve
F. Air Tank Drain Valve
G. Pump Oil Fill Plug
H. Pump Oil Drain Plug
I. Check Valve
J. Magnetic Starter
Pump Specications
2 Cylinder
Two Stage
Oil Lubricated
Cast iron crankcase, cylinder, and head
Weight: 215 lbs. (98 kg.)
Oil Capacity: 104 oz. (3076 mL)
Specications
MODEL DXCMH9919910
WEIGHT 896 lbs. (406 kg)
HEIGHT 50"
WIDTH 71"
AIR TANK CAPACITY 120 gallons (454,2 liters)
APPROX. BLOW OFF PRESSURE 200 psi
FIG. 1
B
C
E
D
A
F
G
H
I
J

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Hot Surfaces
FIG. 2
Denitions: Safety Guidelines
The definitions below describe the level of severity
for each signal word. Please read the manual and pay atten-
tion to these symbols.
DANGER: Indicates an imminently hazardous situation
which, if not avoided, will result in death or serious injury.
WARNING: Indicates a potentially hazardous situation
which, if not avoided, could result in death or serious injury.
CAUTION: Indicates a potentially hazardous situation which,
if not avoided, may result in minor or moderate injury.
NOTICE: Indicates a practice not related to personal injury
which, if not avoided, may result in property damage.
IF YOU HAVE ANY QUESTIONS OR COMMENTS ABOUT
THIS OR ANY D e WALT TOOL, CALL US TOLL FREE AT:
1-888-895-4549
Important Safety Instructions
WARNING: Do not operate this unit until you read this instruction
manual for safety, operation and maintenance instructions.
WARNING: CONTAINS LEAD. May be harmful if eaten or
chewed. May generate dust containing lead. Wash hands after use.
Keep out of reach of children.
WARNING: This product can expose you to chemicals including
Lead, which is known to the State of California to cause cancer and
birth defects or other reproductive harm. For more information go
to www.P65Warnings.ca.gov.
OUTLET TUBES
COMPRESSOR CYLINDER
& HEAD
PUMP
CRANKCASE

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• Unattended operation of this
product could result in per-
sonal injury or property dam-
age. To reduce the risk of
fire, do no allow the com-
pressor to operator unat-
tended
• Always remain in attendance
with the product when it is
operating.
• Always turn off and discon-
nect electrical supply from
unit when not in use.
DANGER: RISK TO BREATHING (ASPHYXIATION)
WHAT CAN HAPPEN HOW TO PREVENT IT
• The compressed air directly
from your compressor is not
safe for breathing. The air
stream may contain carbon
monoxide, toxic vapors,
or solid particles from the
air tank. Breathing these
contaminants can cause
serious injury or death.
• Never use air obtained directly
from the compressor to supply
air for human consumption.
The compressor is not
equipped with suitable filters
and in-line safety equipment
for human consumption.
• Exposure to chemicals
in dust created by
power sanding, sawing,
grinding, drilling and other
construction activities may
be harmful.
• Sprayed materials such as
paint, paint solvents, paint
remover, insecticides, weed
killers, may contain harmful
vapors and poisons.
• Work in an area with good
cross ventilation. Read and
follow the safety instructions
provided on the label or
safety data sheets for the
materials you are spraying.
Always use certified safety
equipment: NIOSH/OSHA
respiratory protection or
properly fitting face mask
designed for use with your
specific application.
SAVE THESE INSTRUCTIONS
DANGER: RISK OF EXPLOSION OR FIRE
WHAT CAN HAPPEN HOW TO PREVENT IT
• It is normal for electrical con-
tacts within the motor and
pressure switch to spark.
• Always operate the compres-
sor in a well ventilated area
free of combustible materials,
gasoline, or solvent vapors.
• If electrical sparks from com-
pressor come into contact
with flammable vapors, they
may ignite, causing fire or
explosion.
• If spraying flammable materi-
als, locate compressor at
least 20' (6.1m) away from
spray area. An additional
length of air hose may be
required.
• Store flammable materials in
a secure location away from
compressor.
• Restricting any of the com-
pressor ventilation openings
will cause serious overheat-
ing and could cause fire.
• Never place objects against
or on top of compressor.
• Operate compressor in an
open area at least 12”
(30.5 cm) away from any wall
or obstruction that would
restrict the flow of fresh air to
the ventilation openings.
• Operate compressor in a
clean, dry well ventilated
area. Do not operate unit in
any confined area. Store
indoors.

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DANGER: RISK OF BURSTING
Air Tank: On February 26, 2002, the U.S. Consumer Product Safety
Commission published Release # 02-108 concerning air compres-
sor tank safety:
Air compressor receiver tanks do not have an infinite life. Tank life is
dependent upon several factors, some of which include operating
conditions, ambient conditions, proper installations, field modifica-
tions, and the level of maintenance. The exact effect of these fac-
tors on air receiver life is difficult to predict.
If proper maintenance procedures are not followed, internal corro-
sion to the inner wall of the air receiver tank can cause the air tank
to unexpectedly rupture allowing pressurized air to suddenly and
forcefully escape, posing risk of injury to consumers.
Your compressor air tank must be removed from service by the end
of the year shown on your tank warning label.
The following conditions could lead to a weakening of the air tank,
and result in a violent air tank explosion:
WHAT CAN HAPPEN HOW TO PREVENT IT
• Failure to properly drain
condensed water from air
tank, causing rust and thinning
of the steel air tank.
• Drain air tank daily or after each
use. If air tank develops a leak,
replace it immediately with
a new air tank or replace the
entire compressor.
• Modifications or attempted
repairs to the air tank. • Never drill into, weld or make any modifications to the air
tank or its attachments. Never
attempt to repair a damaged or
leaking air tank. Replace with a
new air tank.
• Unauthorized modifications to
the safety valve, or any other
components which control air
tank pressure.
• The air tank is designed
to withstand specific
operating pressures. Never
make adjustments or parts
substitutions to alter the factory
set operating pressures.
Attachments & Accessories:
• Exceeding the pressure rating
of air tools, spray guns, air
operated accessories, tires
and other inflatables can
cause them to explode or
fly apart, and could result in
serious injury.
• Follow the equipment
manufacturers
recommendation and never
exceed the maximum allowable
pressure rating of attachments.
Never use compressor to
inflate small low pressure
objects such as children’s toys,
footballs, basketballs, etc.
Tires:
• Over inflation of tires could
result in serious injury and
property damage.
• Use a tire pressure gauge to
check the tires pressure before
each use and while inflating
tires; see the tire sidewall for
the correct tire pressure.
NOTE: Air tanks, compressors
and similar equipment used to
inflate tires can fill small tires
very rapidly. Adjust pressure
regulator on air supply to no
more than the rating of the
tire pressure. Add air in small
increments and frequently use
the tire gauge to prevent over
inflation.

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DANGER: RISK OF INJURY OR PROPERTY DAMAGE WHEN
TRANSPORTING OR STORING
WHAT CAN HAPPEN HOW TO PREVENT IT
• Oil can leak or spill and could
result in fire or breathing
hazard; serious injury or
death can result. Oil leaks will
damage carpet, paint or other
surfaces in vehicles or trailers.
• Always place compressor
on a protective mat when
transporting to protect against
damage to vehicle from leaks.
Remove compressor from
vehicle immediately upon
arrival at your destination.
Always keep compressor level
and never lie on its side.
WARNING: RISK FROM FLYING OBJECTS
WHAT CAN HAPPEN HOW TO PREVENT IT
• The compressed air stream
can cause soft tissue damage
to exposed skin and can
propel dirt, chips, loose
particles and small objects
at high speed, resulting in
property damage or personal
injury.
• Always wear certified safety
equipment: ANSI Z87.1 eye
protection (CAN/CSA Z94.3)
with side shields when using
the compressor.
• Never point any nozzle or
sprayer toward any part of
the body or at other people or
animals.
• Always turn the compressor
off and bleed pressure from
the air hose and air tank before
attempting maintenance,
attaching tools or accessories.

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

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WARNING: RISK FROM MOVING PARTS
WHAT CAN HAPPEN HOW TO PREVENT IT
• Moving parts such as the
pulley, flywheel, and belt can
cause serious injury if they
come into contact with you or
your clothing.
• Never operate the compressor
with guards or covers which are
damaged or removed.
• Keep your hair, clothing and
gloves away from moving parts.
Loose clothes, jewelry or long
hair can be caught in moving
parts.
• Air vents may cover moving
parts and should be avoided as
well.
• Attempting to operate
compressor with damaged or
missing parts or attempting
to repair compressor with
protective shrouds removed
can expose you to moving
parts and can result in serious
injury.
• Any repairs required on this
product should be performed
by a DeWALT factory service
center or a DeWALT authorized
service center.
WARNING: RISK OF UNSAFE OPERATION
WHAT CAN HAPPEN HOW TO PREVENT IT
• Unsafe operation of your air
compressor could lead to seri-
ous injury or death to you or
others.
• Review and understand all
instructions and warnings in
this manual.
• Become familiar with the oper-
ation 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 features
of this product.
• Equip area of operation with a
fire extinguisher.
• Do not operate machine with
missing, broken, or unautho-
rized parts.
• Never stand on the
compressor.

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WARNING: RISK OF INJURY FROM LIFTING
WHAT CAN HAPPEN HOW TO PREVENT IT
• Serious injury can result from
attempting to lift too heavy an
object.
• The compressor is too heavy
to be lifted by one person.
Obtain assistance from others
before lifting.
CAUTION: RISK FROM NOISE
WHAT CAN HAPPEN HOW TO PREVENT IT
• Under some conditions and
duration of use, noise from
this product may contribute to
hearing loss.
• Always wear certified safety
equipment: ANSI S12.6
(S3.19) hearing protection.
SAVE THESE INSTRUCTIONS FOR FUTURE
USE
Know Your Air Compressor
READ THIS OWNER’S MANUAL AND SAFETY RULES BEFORE
OPERATING YOUR UNIT. Compare the illustrations with your
unit to familiarize yourself with the location of various controls
and adjustments. Save this manual for future reference.
FEATURES
AUTO (-) / OFF (O) SWITCH
Place this switch (B) in the AUTO (-) position to
provide automatic power to the pressure switch
and OFF(O) to remove power at the end of each
use. NOTE: ALWAYS ensure the switch (B) is in the
OFF (O) position before removing or replacing
pressure switch cover.
PRESSURE SWITCH
The pressure switch (B) automatically starts the motor when the air
tank pressure drops below the factory set cut-in pressure. It stops
the motor when the air tank pressure reaches the factory set cut-out
pressure.
SAFETY VALVE
This valve (E) is designed to prevent system
E
failures by relieving pressure from the system
when the compressed air reaches a predeter-
mined level. The valve is preset by the manu-
facturer and must not be removed or modified
in any way.
CHECK VALVE
When the air compressor is operating, the
I
check valve (I) is open, allowing compressed
air to enter the air tank. When the air compressor
B

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reaches cut-out pressure, the check valve closes, allowing air
pressure to remain inside the air tank.
AIR INTAKE FILTER
The filter (A) is designed to clean air entering the A
pump. To ensure the pump continually receives a
clean, cool, and dry air supply the filter must always
be clean and the filter intake must be free from
obstructions.
AIR TANK DRAIN VALVE
The drain valve (F) is located at the base of the
F
air tank and is used to drain condensation at
the end of each use. See Draining Air Tank
under Maintenance.
TANK PRESSURE GAUGE
The tank pressure gauge (C) indicates the
C
J
reserve air pressure in the tank.
MAGNETIC STARTER
NOTE: These units require a magnetic
starter.
Magnetic starters (J) that are not factory
mounted on the compressor can be
mounted on the wall if desired. Mount as
close to compressor as possible. Size the
wires, protect them with conduit, and provide branch circuit
protection per the National Electrical Code.
GLOBE VALVE/AIR DISCHARGE VALVE: (sold separately, not
shown)
Opens and closes air distribution from compressor. See Air
Distribution System paragraph under Installation.
REGULATOR (sold separately, not shown):
An air pressure regulator or a separate air transformer which
combines the functions of air regulation and/or moisture and
dirt removal is recommended for most applications. See Air
Distribution System paragraph under Installation.
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.
MAGNETIC STARTER RESET SWITCH
If the motor shuts down because of overload, wait 10–15 minutes
so the motor can cool down. To restart: K
1. Set the Auto/Off switch to OFF (O).
2. Allow the motor to cool.
3. Depress the reset button (K) on the
magnetic starter.
4. Set the Auto/Off switch to AUTO (-).
INSTALLATION
Assembly (Fig. 1)
Unpack the air compressor. Inspect the unit for damage. If the
unit has been damaged in transit, contact the carrier and
complete a damage claim. Do this immediately because there are
time limitations to damage claims.
The carton should contain:
•air compressor
•operator and parts manuals
Check the compressor’s serial label to ensure that you have
received the model ordered, and that it has the required pressure

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rating for its intended use.
INSTALLING HOSES
WARNING: Risk of unsafe operation. Firmly grasp hose in hand
when installing or disconnecting to prevent hose whip.
1. Ensure regulated pressure gauge reads 0 psi.
2. Apply sealant tape to hose threads.
3. Assemble hose to air outlet (D). IMPORTANT: Do not assemble
splitters directly to the air outlet (D).
NOTE: Assembling quick connect bodies to air outlet and quick
connect plugs to hose ends make connecting and disconnecting
hoses simple and easy. Quick connect bodies and plugs are
available for purchase from your local dealer or authorized service
center.
DISCONNECTING HOSES
WARNING: Risk of unsafe operation. Firmly grasp hose in hand
when installing or disconnecting to prevent hose whip.
1. Ensure regulated pressure gauge reads 0 psi.
2. Remove hose from air outlet (D).
Lubrication and Oil
AIR COMPRESSOR
The air compressor pump was filled WITH oil at the manufacturer.
Check air compressor pump oil level before operating unit. See
Compressor Pump Oil under Maintenance.
Compatibility
Air tools and accessories that are run off the compressor must be
compatible with petroleum based products. If you suspect that a
material is not compatible with petroleum products, an air line filter
for removal of moisture and oil vapor in compressed air is required.
NOTE: Always use an air line filter to remove moisture and oil vapor
when spraying paint.
Location
• Locate the air compressor in a clean, dry, and well ventilated
area.
• Located the air compressor at least 12” (30.5 cm) away from
the wall or other obstructions that will interfere with the flow of
air.
• Locate the air compressor as close to the main power supply
as possible to avoid using long lengths of electrical wiring.
NOTE: Long lengths of electrical wiring could cause power loss
to the motor.
• The air filter must be kept clear of obstructions which could
reduce air flow to the air compressor.
HUMID AREAS
In frequently humid areas, moisture may form in the pump and
produce sludge in the oil, causing running parts to wear out
prematurely. Excessive moisture is especially likely to occur if
the unit is located in an unheated area that is subject to large
temperature changes. Two signs of excessive humidity are external
condensation on the pump when it cools down and a “milky”
appearance in compressor oil. You may be able to prevent
moisture from forming in the pump by increasing ventilation or
operating for longer intervals.
NOISE CONSIDERATIONS
Consult local officials for information regarding acceptable
noise levels in your area. To reduce excessive noise, use
vibration mounts or silencers, relocate the unit or construct total
enclosures or baffle walls. Contact a D e WALT service center or
call 1-888-895 - 4549 for assistance.

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Anchoring of the Air Compressor
WARNING: Risk of bursting. Excessive vibration can weaken the
air tank and cause an explosion. The compressor must be properly
mounted.
The air compressor MUST be bolted to a level, solid concrete
surface. Use 3/8” lag screws, vibration pads and concrete
anchors. If help is needed anchoring the air compressor consult
a licensed contractor.
1. Place the air compressor on a level, solid concrete surface.
Make sure the concrete is in good condition with no cracks
or damage.
2. Mark the surface 3/8" Lag
Screw
(not supplied)
Vibration
pad
(not
supplied)
Concrete Anchor
(not supplied)
Surface Line
Shim Under
Vibration pad
(not supplied)
using the holes in
the air compressor
feet as a template.
3. Drill holes in the
surface for the
concrete anchors.
Install concrete
anchors.
4. Line-up holes in
surface with holes in
air compressor feet.
5. Place the vibration pads (not supplied) between the floor and
air compressor feet, see figure. If needed use shims to level
the unit.
6. Place the 3/8” lag screws through the air compressor feet,
vibration pads and into the anchors.
7. Torque 3/8” lag screws to 7-10 ft.-lbs (9.5-13.5 Nm).
Wiring Instructions
WARNING: Improper electrical installation of this product
may void its warranty and your fire insurance. Have circuit wiring
performed by qualified personnel such as a licensed electrician who
is familiar with the current national electrical code and any prevailing
local electrical codes.
WARNING: Risk of electrical shock. Improper electrical grounding
can result in electrical shock. The wiring should be done by a
qualified electrician.
A qualified electrician needs to knows the following before wiring:
1. The amperage rating of the electrical box should be adequate.
Refer to the air compressor's serial label for the unit's voltage
and amperage requirements.
2. The supply line should have the same electrical characteristics
(voltage, cycle, phase) as the motor. Refer to the motor
nameplate, on side of motor, for this information.
NOTE: The wiring used must be rated for the motor nameplate
voltage, plus or minus 10%. Refer to local codes for recommended
wire sizes, correct wire size, and maximum wire run; undersize wire
causes high amp draw and overheating to the motor.
WARNING:Risk of electrical shock. Electrical wiring must
be located away from hot surfaces such as manifold assembly,
compressor outlet tubes, heads, or cylinders.
Grounding Instructions
This product should be connected to a metallic, permanent wiring
system, of and equipment-grounding terminal or lead on the
product.

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Main power disconnect switch
Install a main power disconnect switch in the line from the panel
to the compressor. The main power disconnect switch must be
located near the compressor, for ease of use and safety. When
turned OFF, the main power disconnect switch shuts off all
power to the compressor. When it is turned ON, the compressor
will start and stop automatically, controlled by the pressure
switch.
Air Distribution System
WARNING: Risk of bursting. Plastic or PVC pipe is not designed
for use with compressed air. Regardless of its indicated pressure
rating, plastic pipe can burst from air pressure. Use only metal pipe
for air distribution lines.
INSTALLING AND DISCONNECTING HOSES
WARNING: Risk of unsafe operation. Firmly grasp hose in hand
when installing or disconnecting to prevent hose whip. Ensure
regulated pressure gauge reads 0 psi.
The next figure represents a typical air distribution system.
The following are tips to remember when setting up the air
compressor’s air distribution system.
NOTE: Compressed air from oil lube air compressors will contain
water condensation and oil mist. Several drains, traps and filters
will be needed to supply air without water (including aerosols) or
oil to spray equipment, air tools and accessories requiring filtered
air. Always read the instructions for the air tools and accessories
being used.
• Use pipe that is the same size as the air tank outlet. Piping that
is too small will restrict the flow of air.
• If piping is over 100’ (30.5m) long, use the next larger size.
• Bury underground lines below the frost line and avoid pockets
where condensation can gather and freeze. Apply pressure
before underground lines are covered to make sure all pipe
joints are free of leaks.
• A flexible coupling is recommended to be installed between the
globe valve/air discharge outlet and main air distribution line to
allow for vibration.
• A separate regulator is recommended to control the air
pressure. Air pressure from the tank is usually too high for
individual air driven tools.
• DO NOT install lubricators between the tank and any spray
equipment, air tool or accessory requiring oil-free filtered air.
• Drain all traps, filters and dirt legs daily.

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SPR AY
GUN
AIR
TOOL
DRAIN
LEGS
FI LTER /
MOISTURE
TRAP
DI R T
LEGS
DRAIN
VALVES
DRAIN
VALVE
LUBRIC ATOR
REGUL ATOR
GLOBE VALVE /
AIR DISCHARGE
VALVE
MAIN DISTRIBUTION AIR LINES
Slope pipe in di rection of air o w.
Water condensate ows along
bottom of pipe to drain legs,
preventing it f rom entering feeder
lines.
REGUL ATOR
BALL
FI LTER
FLEXIBLE
COUPLING
DRAIN
VALVE
TYPICAL
COMPRESSED AIR
DISTRIBUTION
SYSTEM
AIR FLOW AIR FLOW
FEEDER LINES SLOPE
WITH AIR FLOW
AIR USAGE
LINES
AIR
COMPRESSOR
FI LTER /
MOISTURE
TRAP
FOR BEST PERFORMANCE
the distance between the
comp ressor and the
moistu re trap should be as
long as possible
DRAIN
VALVES
5 MICRON
FI LTER
.01 MICRON
FI LTER
RISK OF BURSTING. ALWAYS USE
METAL PIPING AND FITTINGS.
How to Use Your Unit (Fig 3)
How to Stop:
Set the Auto/Off switch to “Off”.
Before Starting
WARNING: Do not operate this unit until you read this instruction
manual for safety, operation and maintenance instructions.
Break-in Procedure
NOTICE:Risk of property damage. Serious damage may result if
the following break-in instructions are not closely followed.
This procedure is required before the air compressor is put into
service and when the check valve or a complete compressor pump
has been replaced.
1. Make sure the Auto/Off switch is in the “Off” position.
2. Check oil level in pump. See Oil paragraph in the Maintenance
section for instructions.
3. Recheck all wiring. Make sure wires are secure at all terminals
connections. Make sure all contacts move freely and are not
obstructed.
4. Open the drain valve (counterclockwise) fully to permit air to
escape and prevent air pressure build up in the air tank during
the break-in period.
5. Move the Auto/Off switch to “Auto” position. The compressor
will start.
6. Run the compressor for 30 minutes. Make sure the drain valve
and all air lines are open so there is only a minimal air pressure
build-up in tank.
NOTE: After about 30 minutes, If the unit does not operate
properly, SHUT DOWN IMMEDIATELY, and contact
Product Service.
7. Check all air line fittings and connections/piping for air leaks
by applying a soap solution. Correct if necessary. NOTE: Minor
leaks can cause the air compressor to overwork, resulting in
premature breakdown or inadequate performance.
8. Check for excessive vibration. Readjust or shim air compressor
feet, if necessary.

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9. After 30 minutes, turn the Auto/Off switch to the “Off” position.
10. Close the drain valve.
11. Turn the Auto/Off switch to the “Auto” position. The air receiver
will fill to “cut-out” pressure and the motor will stop.
The compressor is now ready for use.
Before Each Start-Up
1. Place Auto/Off switch to “Off”.
2. Close the drain valve.
3. Visually inspect air lines and fittings for leaks.
4. Check safety valve. See To Check Safety Valve under
Maintenance.
5. Attach hose and accessories.
WARNING: Risk of unsafe operation. Firmly grasp air hose in
hand when installing or disconnecting to prevent hose whip.
WARNING: Risk of unsafe operation. Do not use damaged or
worn accessories.
NOTE: A regulator MUST be installed when using accessories rated
at less than 135 psi.
NOTE: The hose or accessory will require a quick connect plug if
the air outlet is equipped with a quick connect socket.
WARNING:Risk of bursting. Too much air pressure causes a
hazardous risk of bursting. Check the manufacturer’s maximum
pressure rating for air tools and accessories. The regulator outlet
pressure must never exceed the maximum pressure rating.
CAUTION: Risk of unsafe operation. Compressed air from the
unit may contain water condensation and oil mist. Do not spray
unfiltered air at an item that could be damaged by moisture. Some
air tools and accessories may require filtered air. Read the instruc-
tions for the air tools and accessories.
How to Start
1. Turn the Auto/Off switch to “Auto” and allow tank pressure to
build. Motor will stop when tank pressure reaches “cut-out”
pressure.
2. When the tank pressure reaches "cut-out" pressure open the
globe valve/air discharge valve.
IMPORTANT: When using regulator and other accessories refer
to the manufacturers instructions.
WARNING:Risk of bursting. If any unusual noise or vibration is
noticed, stop the compressor immediately and have it checked by
a trained service technician.
The compressor is ready for use.
Shut-down (Fig. 1)
1. Move Auto/Off switch to the OFF position. NOTE: If finished
using compressor, follow Steps 2 - 6.
2. Remove hose and accessory.
WARNING: Risk of unsafe operation. Firmly grasp air hose in hand
when installing or disconnecting to prevent hose whip.
3. 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.
4. Allow the compressor to cool down.
5. Wipe air compressor clean and store in a safe, non-freezing
area.

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OPEN
CLOSE
FIG. 3
OFF
AUTO
MAINTENANCE
Maintenance Chart
Procedure
Daily
Weekly
Monthly
or every
50 Hours
1 year
or 200
Hours
See tank
warning
label
Check safety valve X
Inspect air filter X+
Drain air tank X
Check pump oil level X
Change pump oil X **+
Oil leak inspection X
Inspect drive belt X
Check drive belt tension
X
Check pulley/flywheel alignment
X
Check for unusual noise/vibration X
Check for air leaks X*
Clean compressor exterior X
Remove tank from service X++
* To check for air leaks apply a solution of soapy water around joints.
While compressor is pumping to pressure and after pressure cuts out,
look for air bubbles to form.
** The pump oil must be changed after the first 20 hours or operation.
Thereafter, when using full synth etic non-detergent air compressor
oil, change oil every 200 hours of operation or once a year, whichever
comes first.
+ Perform more frequent in dusty or humid conditions.
++
For more information, call 1-888-895-4549 .
WARNING: Risk of unsafe operation. Unit cycles automati-
cally when power is on. When performing maintenance, you may
be exposed to voltage sources, compressed air, or moving parts.
Personal injuries can occur. Before performing any maintenance or
repair, disconnect power source from the compressor and bleed off
all air pressure.
To ensure efficient operation and longer life of the air compressor
outfit, a routine maintenance schedule should be prepared and fol-
lowed. The following routine maintenance schedule is geared to an
outfit in a normal working environment operating on a daily basis.

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If necessary, the schedule should be modified to suit the condi-
tions under which your compressor is used. The modifications will
depend upon the hours of operation and the working environment.
Compressor outfits in an extremely dirty and/or hostile environment
will require a greater frequency of all maintenance checks.
NOTE: See Operation section for the location of controls.
Checking Safety Valve (Fig. 1)
WARNING: Hot surfaces. Risk of burn. Tubes, pump head, and
surrounding parts are very hot, do not touch (see the Hot Surfaces
identified in Fig. 2). Allow compressor to cool prior to servicing.
WARNING: Risk of bursting. If the safety valve does not work
properly, over-pressurization may occur, causing air tank rupture or
an explosion.
WARNING: Risk from flying objects. Always wear certified safety
equipment: ANSI Z87.1 eye protection (CAN/CSA Z94.3) with side
shields.
Before starting compressor, pull the ring on the safety valve to
make sure that the safety valve operates freely. If the valve is stuck
or does not operate smoothly, it must be replaced with the same
type of valve.
Checking Air Filter (Fig. 1)
WARNING: Hot surfaces. Risk of burn. Tubes, pump head, and
surrounding parts are very hot, do not touch (see the Hot Surfaces
identified in Fig. 2). Allow compressor to cool prior to servicing.
A dirty air filter will not allow the compressor to operate at full
capacity. Keep the air filter clean at all times.
1. Ensure Auto/Off switch (B) is in the OFF Position.
2. Allow unit to cool.
3. Remove the wing nut (L).
4. Removetheoutermetal cover(M). LMN
5. Check the filter element (N) if it is
dirty or filled with paint, replace
it.
6. Place the outer metal cover back
over the filter element.
7. Secure with the wing nut.
CAUTION: Risk of unsafe opera-
tion. Do not operate without air filter.
Draining Air Tank (Fig. 3)
WARNING: Risk of unsafe operation. Air tanks contain high
pressure air. Keep face and other body parts away from outlet of
drain. Use eye protection [ANSI Z87.1 (CAN/CSA Z94.3)] when
draining as debris can be kicked up into face.
WARNING: Risk from noise. Use ear protection (ANSI S12.6
(S3.19) as air flow noise is loud when draining.
NOTE: All compressed air systems generate condensation that accu-
mulates in any drain point (e.g., tanks, filter, aftercoolers, dryers). This
condensate contains lubricating oil and/or substances which may be
regulated and must be disposed of in accordance with local, state,
and federal laws and regulations.
1. Set the Auto/Off switch to “Off”.
2. Pull ring on safety valve allowing air to bleed from the tank until
tank pressure is approximately 20 psi. Release safety valve
ring.
3. Drain water from air tank by opening drain valve (counterclock-
wise) on bottom of tank.
WARNING: Risk of bursting. Water will condense in the air tank.
If not drained, water will corrode and weaken the air tank causing a

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risk of air tank rupture.
NOTICE: Risk of property damage. Drain water from air tank may
contain oil and rust which can cause stains.
4. After the water has been drained, close the drain valve (clock-
wise). The air compressor can now be stored.
NOTE: If drain valve is plugged, release all air pressure. The valve
can then be removed, cleaned, then reinstalled.
Compressor Pump Oil (Fig. 4)
NOTICE: Risk of property damage. Use air compressor oil only.
Multi-weight automotive engine oils like 10W30 should not be used
in air compressors. They leave carbon deposits on critical compo-
nents, thus reducing performance and compressor life.
NOTE: Use full synthetic non-detergent air compressor oil.
NOTE: Crankcase oil capacity is approximately 104 fluid ounces
(3076ml).
Checking
1. The oil level should be to the middle of the sight glass (O).
2. If needed remove oil fill plug (G) and slowly add oil until it
reaches the middle of the sight glass.
Changing
WARNING: Drain tank to release air pressure before removing
the oil fill cap or oil drain plug.
1. Remove the oil fill plug (G).
2. Remove the oil drain plug (H) and drain oil into a suitable con-
tainer.
3. Replace the oil drain plug (H) and tighten securely
4. Slowly add compressor oil until it reaches the middle of the
sight glass (O). NOTE: When filling the crankcase, the oil
flows very slowly into the pump. If the oil is added too quickly,
it will overflow and appear to be full.
CAUTION: Overfilling with oil will cause premature compressor
failure. Do not overfill.
5. Replace oil fill plug (G) and tighten securely.
P = Full
Q = Add
H = Oil drain plug
O = Oil level sight glass
G = Oil fill plug
Fig. 4 H
G
O
Belt Replacement
WARNING: This unit starts automatically. ALWAYS shut off the
main power disconnect, and bleed all pressure from the system
before servicing the compressor, and when the compressor is
not in use. Do not use the unit with the shrouds or belt guard
removed. Serious injury could occur from contact with moving
parts. Hot surfaces. Risk of burn. Pump head, and surrounding
P
Q

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parts are very hot, do not touch (see the Hot Surfaces identified
in Fig. 2). Allow compressor to cool prior toservicing.
1. Set the Auto/Off lever to “Off”, shut off the main power discon-
nect, and relieve all air pressure from the air tank.
2. Remove the front of the
RR
beltguard by removing
the screws (R) using a
Torx T25 bit.
3. Mark pump position on
saddle.
4. Loosen the motor
mounting screws and
slide the motor toward
the air compressor.
5. Remove the belt and
replace with a new one.
6. See the Adjusting Belt Tension before tightening motor
mounting screws.
Adjusting Belt Tension
1. Slide motor into original
Downward Force
Deflection
position, line the motor
up with the mark made
earlier on saddle.
2. Tighten two outside motor
mounting screws enough
to hold the motor in
place for checking pulley
and flywheel alignment.
3. The belt should deflect
1/2” (13 mm)at midway
between the pulley and the flywheel when a 10 pound (4.6kg.)
weight is applied at the midway point.
3. When proper belt tension is achieved, tighten
all four motor mounting screws. Torque to 20-25 ft-lbs
(27.1–33.9 Nm).
NOTE: Once the engine pulley has been moved from its factory set
location, the grooves of the flywheel and pulley must be aligned
to within 1/16” (1.6mm) to prevent excessive belt wear. Verify the
alignment by performing the following Motor Pulley/Flywheel -
Alignment.
Motor Pulley/Flywheel Alignment
NOTE: Once the motor pulley has been moved from its factory set
location, the grooves of the flywheel and pulley must be aligned to
within 1/16” (1.6 mm) to prevent excessive belt wear.
The air compressor flywheel and motor pulley must be in-line (in the
same plane) within 1/16” (1.6 mm) to assure belt retention within
flywheel belt grooves. To check alignment, perform the following
steps:
1. Set the Auto/Off lever to “Off”, shut off the main power discon-
nect, and relieve all air pressure from the air tank.
2. Remove belt guard.
3. Place a straightedge
against the outside of
the flywheel and the
motor drive pulley.
4. Measure the distance
between the edge of
the belt and the straightedge at points A1 and A2 in figure.
The difference between measurements should be no more than
1/16” (1.6 mm).
5. If the difference is greater than 1/16” (1.6 mm) loosen the set

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screw holding the motor drive pulley to the shaft and adjust
the pulley’s position on the shaft until the A1 and A2 measure-
ments are within 1/16” (1.6 mm) of each other.
6. Tighten the motor drive pulley set screw.
7. Visually inspect the motor drive pulley to verify that it is per-
pendicular to the drive motor shaft. Points B1 and B2 of Figure
should appear to be equal. If they are not, loosen the setscrew
of the motor drive pulley and equalize B1 and B2, using care
not to disturb the belt alignment performed in step 2.
8. Retightenthemotordrivepulleysetscrew.Torqueto145–165inlbs
(16.4–20.3Nm).
9. Reinstall belt guard.
Air Compressor Pump Intake and Exhaust
Valves
Once a year have a Trained Service Technician check the air com-
pressor pump intake and exhaust valves.
Inspect Air Lines and Fittings for Leaks
1. Set the Auto/Off lever to “Off”, shut off the main power discon-
nect, and relieve all air pressure from the air tank.
2. Apply a soap solution to all air line fittings and connections/
piping.
3. Correct any leaks found.
IMPORTANT: Even minor leaks can cause the air compressor
to overwork, resulting in premature breakdown or inadequate
performance.
Air compressor Head Bolts - Torquing
The air compressor pump head bolts should be kept properly
torqued. Check the torques of the head bolts after the first five
hours of operation. Torque to 32-37ft.-lbs. (43.4-50.2 Nm).
Service and Adjustments
ALL MAINTENANCE AND REPAIR OPERATIONS NOT LISTED
MUST BE PERFORMED BY TRAINED SERVICE TECHNICIAN.
WARNING: Risk of unsafe operation. Unit cycles automati-
cally when power is on. When servicing, you may be exposed
to voltage sources, compressed air, or moving parts. Before
servicing unit unplug or disconnect electrical supply to the air
compressor, bleed tank of pressure, and allow the air compres-
sor to cool.
To Replace or Clean Check Valve
1. Release all air pressure from air tank. See Draining Air Tank in
the Maintenance section.
2. Set the Auto/Off lever to “Off”, shut off the main power discon-
nect, and relieve all air pressure from the air tank.
3. Using an adjustable
In closed position
disc is visible.
In open
position
nothing is
visible.
Screwdriver
wrench loosen outlet
tube nut at air tank
and pump. Carefully
move outlet tube
away from check
valve.
4. Using an adjustable
wrench loosen pres-
sure relief tube nut
at air tank. Carefully
move pressure relief tube away from check valve.
5. Unscrew the check valve (turn counterclockwise) using a 7/8”
open end wrench. NOTE the orientation for reassembly.
6. Using a screwdriver, carefully push the valve disc up and
down. NOTE: The valve disc should move freely up and down