DeWalt DXCMH1393075 Instruction Manual

DXCMH1393075

Two Stage, Belt Drive, Gasoline Driven Air Compressors Les compresseurs d'air à deux étages, la courroie d'entraînement, entraîné par un moteur essence

Compresores motor de gasolina impulsado de aire, dos 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

English

FIG. 1

Pump Specications

2 Cylinder Two Stage Oil Lubricated Cast iron crankcase, cylinder, and head Weight: 136 lbs. (62 kg.) Oil Capacity: 53 oz. (1567 mL)

Engine Specications

Honda 389 cc Internal Combustion 4-stroke High RPM 3600

Specications

MODEL DXCMH1393075 WEIGHT

497 lbs. (225,4 kg)

HEIGHT

46.4” (1178.6 mm)

WIDTH

19.5” (495.3 mm)

Air Compressor

A. Pump Air Intake Filter B. Engine Air Filter C. Engine START/RUN/OFF Switch D. Air Tank Pressure Gauge E. Air Outlet F. Unloader Valve G. Safety Vavle

H. Air Tank Drain Valve I. Pump Oil Fill Plug J. Pump Oil Drain Plug K. Fixed Throttle L. Choke Control M. Fuel Valve Lever N. Starter Grip O. Check Valve

MODEL DXCMH1393075 LENGTH

42" (1066.8 mm)

AIR TANK CAPACITY

30 gallons (113,6 liters)

APPROX. BLOW OFF PRESSURE

175 psi

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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 attention to these symbols.

DANGER: Indicates an imminently hazardous situation

which, if not avoided, will result in death or serious injury.

WARNING: Indicates a potentially hazardous situation

which, if not avoided, could result in death or serious injury.

CAUTION: Indicates a potentially hazardous situation

which, if not avoided, may result in minor or moderate

injury. 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 DeWALT TOOL, CALL US TOLL FREE AT:

1-888-895-4549

Important Safety Instructions

DANGER: Carbon Monoxide. Using an engine indoors can kill you in minutes. Engine exhaust contains high levels of carbon monoxide (CO), a poisonous gas you cannot see or smell. You may be breathing CO even if you DO NOT smell engine exhaust.

• NEVER use an engine inside homes, garages, crawlspaces, or other partly enclosed areas. Deadly levels of carbon monoxide can build up in these areas. Using a fan or opening windows and doors does NOT supply enough fresh air.

• ONLY use outdoors and far away from open windows, doors and vents. These openings can pull in engine exhaust.

OUTLET TUBES

COMPRESSOR CYLINDER

& HEAD

PUMP

CRANKCASE

ENGINE MUFFLER

GASOLINE

ENGINE

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SAVETHESEINSTRUCTIONS

DANGER: RISK OF EXPLOSION OR FIRE

WHAT CAN HAPPEN HOW TO PREVENT IT

• Spilled gas o line and it’s vapors can be come ignited from cigarette sparks, electrical arcing, exhaust gas es and hot engine components such as the muffler.

• Shut off en gine and allow it to cool before adding fuel to the tank.

• Use care in fill ing tank to avoid spill ing fuel. Move unit away from fueling area before starting en gine.

• Heat will ex pand fuel in the tank which could result in spillage and pos si ble fire explosion.

• Keep maximum fuel level 1/2" (12.7 mm) be low bottom of filler neck to allow for expansion.

• Even when the engine is used correctly, CO may leak into your home. ALWAYS use a battery-powered or battery backup CO alarm (not supplied) in the home. Read and fol- low all directions for CO alarm before using. If you start to feel sick, dizzy or weak at anytime, move to fresh air immediately. See a doctor. You could have carbon monoxide poisoning.

WARNING: Do not operate this unit until you read this instruction manual and the engine instruction manual for safety, operation and maintenance instructions.

WARNING: This product may not be equipped with a sparkarresting muffler. If the product is not equipped and will be used around flam ma ble ma teri als or on land covered with materials such as agricultural crops, forest, brush, grass or other similar items, then an ap proved spark arrester must be installed and is legally required in the state of California. It is a violation of California statutes section 130050 and/or sec tions 4442 and 4443 of the California Public Re sourc es Code, unless the engine is equipped with a spark arrester, as defined in section 4442, and maintained in ef fec tive work ing order. Spark arresters are also required on some U.S. For est Service land and may also be legally required under other statutes and or di nanc es.

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.

WARNING: The engine exhaust from this product contains chemicals known to the State of California to cause cancer, birth defects or other reproductive harm.

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 • Combustiblematerials

whichcomeintocontact withhotenginepartscan becomeignited.

• Add fuel outdoors in a well ventilated area. Make sure there are no sources of ignition, such as cigarettes near refueling location.

• Operate compressor in a clean, dry, well ventilated area a minimum of 48" (1.22 m) from any building, object or wall. Do not operate unit indoors or in any confined area.

• Operate compressor in an open area away from dry brush, weeds or other combustible materials.

• Improperly stored fuel could lead to acciden tal ignition. Fuel im prop er ly secured could get into the hands of children or oth er un qual i fied persons.

• Store fuel in an OSHA-approved con tain er, in a se cure location away from work 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.

DANGER: RISK TO BREATHING (ASPHYXIATION)

WHAT CAN HAPPEN HOW TO PREVENT IT

• Breathing ex haust fumes will cause se ri ous injury or death! En gine exhaust con tains carbon mon ox ide, an odorless and deadly gas.

• Always operate air compressor outside in a clean, well ventilated area. Avoid enclosed areas such as garages, basements, storage sheds, which lack a steady exchange or air. Keep children, pets and others away from area of operation.

• 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.

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• 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 fit ting face mask designed for use with your specific application.

DANGER: 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 modifications, and the level of maintenance. The exact effect of these factors on air receiver life is difficult to predict.

If proper maintenance procedures are not followed, internal corrosion 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 unloader valve, 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.

• Excessive vibration can

weaken the air tank and cause rupture or explosion. Excessive vibration will occur if the compressor is not properly mounted or if engine operates above recommended RPM.

• Do not remove the stiffener bar connecting the compressor pump to the engine, except to adjust belt tension. Then securely tighten the stiffener bar bolts. This bar controls unit vibration.

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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.

DANGER: RISK OF INJURY OR PROP ER TY 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.

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WARNING: RISKFROMMOVINGPARTS

WHAT CAN HAPPEN HOW TO PREVENT IT

• The engine can start accidentally if the flywheel is turned by hand or moved by pulling on the starter rope.

• Always disconnect the spark plug and bleed pressure from the air tank before performing maintenance.

• 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 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, 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 OF UNSAFE OPERATION

WHAT CAN HAPPEN HOW TO PREVENT IT

• Unsafe op er a tion of your air compressor could lead to se rious 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 op era tion and con trols 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 prod uct.

• Equip area of operation with a fire extinguisher.

• Do not op er ate machine with missing, broken, or un au thorized parts.

• Never stand on the compressor.

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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

ELECTRIC START

The engine switch (C) can be placed in three

positions; START, RUN and OFF. See Starting under Operation for complete starting

instructions.

UNLOADER VALVE

When the maximum air tank pressure is obtained, the unloader valve (F) will blow-off. This will cause the compressor to exhaust the air to the atmosphere and not the tank.

ManualLock:The manual lock allows you to

OPEN

CLOSED

manually unload the compressor with air pressure in the air tank. To operate the manual lock:

Rotate the manual lock unloader lever to the open position to prevent air tank pressure buildup. Rotate manual lock unloader lever to the closedposition after starting the engine to allow air tank pressure to build. NOTE: Air will not build in tank when manual lock unloader lever in the open position.

SAFETY VALVE

This valve (G) is designed to prevent system

failures by relieving pressure from the system when the compressed air reaches a predeter-

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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

check valve (O) 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.

AIR INTAKE FILTER

The filter (A) is designed to clean air entering the

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 (H) is located at the base of

the air tank and is used to drain condensation at the end of each use. See Draining Air Tank under Maintenance.

TANK PRESSURE GAUGE

The tank pressure gauge (D) indicates the

reserve air pressure in the tank.

GLOBE VALVE/AIR DISCHARGE VALVE:

(sold separately, not shown)

Opens and closes air distribution from compressor. 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.

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.

GASOLINE ENGINE

The gasoline engine powers the pump. The engine drives a pulley and belt, which transfers power from the engine to the pump pistons via a flywheel and a crankshaft. The flywheel fan helps cool the pump.

THROTTLE CONTROL

When maxi mum air tank pres sure is reached and the unloader valve vents air, it activates the throttle control on the engine. This gas saving feature holds the engine at a factory-set idling speed until air pressure in the air tank drops to reset pressure. The unloader valve then reactivates the throttle control and accelerates the engine to full throttle.

LOW OIL SHUT DOWN SENSOR

The air compressor engine is equipped with a low oil shutdown sensor. This is a safety device designed to protect your engine from damage in the event the oil level in the crankcase is below minimum.

If the oil in the engine gets low while the air compressor is running it will automatically shut down the engine and will not restart until oil is added to the engine. If the oil is low before start-up, the engine will not start until oil is added.

NOTE: The low oil shutdown sensor is very sensitive. You must fill the engine to the full mark on the dipstick to inactivate this safety device.

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INSTALLATION

Assembly(refer to Fig. 1, pg. 2)

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

• engine manual

• vibration pads (4)

Check the compressor’s serial label to ensure that you have received the model ordered, and that it has the required pressure 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. Pull ring on safety valve allowing air to bleed from the tank until tank pressure is 0 psi. Release safety valve ring.

2. Apply sealant tape to hose threads.

3. Assemble hose to air outlet (E). IMPORTANT: Do not assemble splitters directly to the air outlet (E).

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. Pull ring on safety valve allowing air to bleed from the tank until tank pressure is 0 psi. Release safety valve ring.

2. Remove hose from air outlet (E).

Lubrication and Oil

ENGINE

1. The engine was filled WITH oil at the manufacturer. Check engine oil level before operating unit. If necessary, fill engine to the appropriate level with recommended oil, see engine's instruction manual supplied by engine manufacturer for correct procedure.

2. Add fuel to engine. See engine's instruction manual supplied by engine manufacturer for correct procedure.

WARNING: Risk of explosion or fire. Gasoline vapor is highly flammable. Refuel outdoors preferably, or only in well-ventilated areas. Do not refuel or check gasoline level while the engine is running. Do not store, spill or use gasoline near an open flame, a source of sparks (such as welding), or near operating electrical equipment.

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

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when spraying paint.

Location

WARNING: Risk of breathing. Exhaust from the gasoline engine

contains deadly carbon monoxide, which is odorless and toxic. Operate engine only in well ventilated areas.

NOTICE: Risk of property damage. In order to avoid damaging the air compressor, do not allow the unit to be tilted more than 10º when operating.

Place air compressor at least 4 ft (1.2 m) away from obstacles that may prevent proper ventilation. Keep unit away from areas that have dirt, vapor and volatile fumes in the atmosphere which may clog and gum up the intake filter and valves, causing inefficient operation.

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 DeWALT service center or call 1-888-895-4549 for assistance.

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 surface. Remove the compressor from the shipping pallet and place it on

the floor or a hard, level surface. The compressor must be level to ensure proper lubrication of the pump and good drainage of the moisture in the tank.

The shipping pallet is not designed as a base for an operating compressor. Operating the compressor while it is on the pallet will void your warranty.

To prevent damage to tank and pump, the tank must be shimmed so the pump is level within 1/8” per lineal foot maximum to distribute oil properly. Fasten to floor and NEVER force tank feet to floor without shims when tightening. We also recommend the use of vibration pads (094-0137) under tank feet (see X).

NOTE: If the compressor is mounted on a vehicle, the vehicle must be parked on a level surface while operating the compressor. This is to ensure proper lubrication of the pump and gasoline engine.

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Connecting a Battery

1. Battery: A 12 volt sealed battery with a minimum ampere-

hour rating of 18 Ah is required (battery not included).

2. Batterycables: Select battery cables to avoid greater than

.05 volt drop in the cable during starter motor operation.

3. BatteryCablesizeandlength:(Gauge x length) Positive Cable: AWG No. 4 x 1.5 m (5.0 ft) maximum. Negative Cable: AWG No. 4 x 2.3 m (7.5 ft) maximum.

4. WiringPrecautions:

A. Connect the battery positive (+) cable to the starter

solenoid terminal.

B. Connect the battery negative (-) cable to the engine

crankcase or engine frame mounting bolt.

C. Do not route the battery cables on or near any hot,

moving or rotating parts or sharp edges. Keep the battery cables and electrical wires away from the fuel line.

D. Protect positive electrical connections with a cover or

insulation.

Failure to connect and disconnect in the proper sequence can cause equipment damage. Ensure there is a clean tight fit from the cables to the post.

WARNING: Remove the cable from the negative (-) side of

thebattery before servicing.

Servicing of batteries are to be performed or supervised by personnel knowledgeable of batteries and the required precautions. Keep unauthorized personnel away from batteries.

Battery Safety Instructions

WARNING: Lead-acid batteries present a risk of fire because

they generate hydrogen gas. The following procedures are to be

followed:

 • Donotsmokewhennearbatteries.  • Donotcauseflameorsparkinbatteryarea.  • Dischargestaticelectricityfrombodybeforetouching 

batteries by first touching a grounded metal surface.

 • Donotdisposeofbatteriesinafire.Thebatteryis

capable

of exploding.

 • Donotopenormutilatethebatteryorbatteries. 

Released electrolyte has been known to be harmful to the skin and eyes and to be toxic.

WARNING: A battery presents a risk of electrical shock and a high short circuit current. The following precautions are to be observed when working on batteries:

 • Removewatches,ringsorothermetalobjects.  • Usetoolswithinsulatedhandles.  • Wearrubbergloves.  • Donotlaytoolsormetalpartsontopofbatteries.  • Disconnectchargingsourcepriortoconnectingor 

disconnecting battery terminals.

 • Determineifthebatteryisinadvertentlygrounded.When

inadvertently grounded, remove source of ground. Contact with any part of a grounded battery is capable of resulting in electrical shock. The risk of such shock is reduced when such grounds are removed during installation and maintenance.

 • Failuretoconnectanddisconnectinthepropersequence

can cause equipment damage. Ensure there is a clean tight fit from the cables to the post.

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Pre-Start Checklist (refer to Fig. 1, pg. 2)

1. Ensure engine START/RUN/OFF switch (C) is in the OFF position.

2. Ensure air tank is drained, see Draining Air Tank under

Maintenance.

3. Ensure the drain valve (H) is closed.

4. Ensure safety valve (G) is functioning properly, see Checking

SafetyValve under Maintenance.

5. Check pump oil level, see Compressor Pump Oil under Maintenance.

CAUTION:

Do not operate without oil or with inadequate oil. DeWALT is not responsible for compressor failure caused by inadequate oil.

6. Check engine's oil and fuel level, see engine's instruction manual

for correct procedures.

7. Visually inspect drive belt. Replace belt if frayed, cracked, or

worn

NOTE: Outer belt cover must be removed to inspect drive belt.

8. Ensure all guards, covers, and labels are in place, legible (for

labels) and securely mounted. Do not use compressor until all items have been verified.

WARNING: Do not operate this unit until you read this instruction manual and the engine 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 used for the first time.

• When the check valve has been replaced.

• When the compressor pump has been replaced.

Theprocedure:

1. Follow Pre-StartChecklist.

2. Rotate the unloader's manual lock to the open position to

prevent air tank pressure buildup.

3. Prepare engine for first time use, see engine's instruction manual for correct procedure.

4. Place the fuel valve lever (M) in the

OPEN

CLOSED

L M

OFF

ON postion.

If the engine is cold, move the choke (L) to the CLOSED position as shown. If the engine is hot, move the choke to the OPEN position.

RecoilStart

a. Turn the engine START/RUN/OFF switch (C) to the RUN

position.

WARNING: Risk of unsafe operation. Pull starter grip slowly until resistance is felt. Then pull starter grip (N) rapidly to avoid kickback and prevent hand or arm injury.

NOTE: Do not allow the starter grip to snap back. Return it gently by hand.

 ElectricStart

a. Connect a battery to the solenoid on the gas engine. See

ConnectingaBattery for procedure.

b. Place

engine START/RUN/OFF switch

START

position and hold until the engine starts.

NOTE: Do not hold the switch in the

START

position for more than 5 seconds. If the engine does not start, wait 10 seconds before retrying. Failure to follow these instructions may result in damage to the starter motor due to overheating.

c. When the engine starts, release the engine switch allowing it

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to return to the RUN position.

NOTE: Do not turn the engine switch to the

START

position while

the engine is running. NOTE: If the oil level in the engine is low, the engine will not start. If

the engine does not start, check the oil level and add oil as needed. NOTE: To ensure maximum oil lubrication, operate the unit on a

level surface.

7. As the engine warms up, move the choke to the OPEN position.

8. Run the air compressor for 30minutes to seat the rings and

lubricate all the internal surfaces. Ensure there is no pressure build up in the air tank by observing the reading on the air tank pressure gauge.

9. Rotate the manual lock on the unloader valve into the closed

position so the air tank pressure can build.

10. Compressed air will be available from the hose air outlet until it is used up or bled off.

OPERATING PROCEDURES Start-up (refer to Fig. 1, pg. 2)

WARNING: Do not operate this unit until you read this instruc-

tion manual and the engine instruction manual for safety, operation and maintenance instructions.

1. Follow Pre-StartChecklist.

2. Rotate the manual lock unloader lever to the open position to assist with start up.

3. Place the fuel valve lever (M) in the ON postion.

If the engine is cold, move the choke (L) to the CLOSED position as shown. If the engine is hot, move the choke to the OPEN position.

5. RecoilStart

a. Turn the engine START/RUN/OFF switch (C) to the RUN

position.

WARNING: Risk of unsafe operation. Pull starter grip slowly until resistance is felt. Then pull starter grip (N) rapidly to avoid kickback and prevent hand or arm injury.

NOTE: Do not allow the starter grip to snap back. Return it gently by hand.

ElectricStart

a. Connect a battery to the solenoid on the gas engine. See

ConnectingaBattery for procedure.

b. Place

engine START/RUN/OFF switch

START

position and hold until the engine starts.

NOTE: Do not hold the switch in the

START

position for more than 5 seconds. If the engine does not start, wait 10 seconds before retrying. Failure to follow these instructions may result in damage to the starter motor due to overheating.

c. When the engine starts, release the engine switch allowing it

to return to the RUN position.

NOTE: Do not turn the engine switch to the

START

position while

the engine is running. NOTE: If the oil level in the engine is low, the engine will not start. If

the engine does not start, check the oil level and add oil as needed. NOTE: To ensure maximum oil lubrication, operate the unit on a

level surface.

6. As the engine warms up, move the choke to the OPEN position.

7. Rotate manual lock unloader lever to the closedposition to allow

air tank pressure to build. NOTE: Pump will not operate with the manual lock unloader lever in the open position.

8. Allow compressor to pump up to blowoff pressure. NOTE: If any unusual noise or vibration is noticed, stop the

compressor and refer to the troubleshooting section. NOTE: The air compressor pump is capable of running continuously.

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To prolong the air compressor's life, it is recommended to run at high throttle 50-75% of the run time and idle for 25% of the run time.

9. Attach hose and accessory.

WARNING: Risk of unsafe operation. Firmly grasp hose in hand

when installing or disconnecting to prevent hose whip.

WARNING: Risk of unsafe operation. Do not use damaged or

worn accessories.

CAUTION: Risk of unsafe operation. Compressed air from the unit may contain wa ter condensation and oil mist. Do not spray un fil tered air at an item that could be damaged by moisture. Some air op er ated tools or de vic es may require filtered air. Read the

in struc tions for the air tool or device.

Shut-down

1. Place the engine START/RUN/OFF switch (C) to the OFF Position.

2. Place the fuel valve lever (M) in the OFF postion. NOTE: If finished using compressor, follow Steps 3–5.

3. Remove hose and accessory.

4. Pull ring on safety valve (G) allowing air to bleed from the tank

until tank pressure is approximately 20 psi. Release safety valve ring.

5. Drain the air tank.

See DrainingAirTank under Maintenance

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.

OPEN

FIG. 3

MAINTENANCE (refer to Fig. 1, pg. 2)

The following procedures must be followed when maintenance or service is performed on the air compressor.

1. Ensure engine START/RUN/OFF switch (C) is in the OFF position.

2. Disconnect spark plug wire.

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

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disassembly to make reassembly easier. NOTE: Any service operations not included in this section should

be performed by a DeWALT factory service center or a DeWALT authorized service center.

MaintenanceChart

Procedure

Daily

Weekly

Monthly

1year

or 200

Hours

Seetank

warning

label

Check safety valve

Inspect air filter

Drain air tank

Check pump oil level

Change pump oil

Oil leak inspection

Inspect drive belt

Check drive belt tension

Check pulley/flywheel alignment

Check for unusual noise/vibration

Check for air leaks

Clean compressor exterior

Remove tank from service

Engine See engine instruction manual. * 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

synth

etic blend 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: To avoid personal injury, always shut off the gasoline engine and relieve all air pressure from the system before performing any service on the air compressor.

To ensure efficient operation and longer life of the air compressor outfit, a routine maintenance schedule should be prepared and followed. The following routine maintenance schedule is geared to an outfit in a normal working environment operating on a daily basis. If necessary, the schedule should be modified to suit the conditions 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(refer to Fig. 1, pg. 2)

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.

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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

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 engine START/RUN/OFF switch (C) is in the OFF position.

2. Allow unit to cool.

3. Remove the wing nut (P).

4. Remove the outer metal cover (Q).

5. Remove element (R) from filter base.

6. If element needs cleaning, blow out with air. Replace if needed. Purchase replacement parts from your local dealer or authorized service center. Always use identical replacement parts.

7. Place element back in filter base.

8. Place the outer metal cover back over

the filter element.

9. Secure with the wing nut.

CAUTION: Risk of unsafe operation. Do not operate without

air filter.

Draining Air Tank (refer to Fig. 3, pg. 17)

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 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 engine START/RUN/OFF switch (C) is in the OFF position.

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 (counterclockwise) 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 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).

NOTE: If drain valve is plugged, release all air pressure. The valve can then be removed, cleaned, then reinstalled.

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Compressor Pump Oil (refer to Fig. 4, pg. 20)

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.

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 components, thus reducing performance and compressor life.

NOTE: Use synthetic blend non-detergent air compressor oil. NOTE: Crankcase oil capacity is approximately 53 fluid ounces

(1567 ml).

Checking

1. Ensure engine START/RUN/OFF switch (C) is in the OFF Position.

2. The oil level should be to the middle of the sight glass (S).

3. If needed remove oil fill plug (I) and slowly add oil until it reaches the middle of the sight glass.

Changing

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: Drain tank to release air pressure before removing the oil fill cap or oil drain plug.

1. Ensure engine START/RUN/OFF switch (C) is in the OFF

position.

2. Allow the unit to cool.

3. Disconnect spark plug wire.

4. Drain air tank.

5. Remove the oil fill plug (I).

6. Remove the oil drain plug (J) and drain oil into a suitable container.

7. Replace the oil drain plug (J) and tighten securely

8. Slowly add compressor oil until it reaches the middle of the sight glass (S). 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.

9. Replace oil fill plug (I) and tighten securely.

10. Reconnect spark plug wire.

NOTE: Pump oil contains substances that are regulated and must be disposed of in accordance with local, state and federal laws and regulations.

T=Full U=Add J=Oildrainplug S=Oillevelsightglass I=Oilfillplug

Fig. 4

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Belt Replacement

WARNING: To avoid personal injury, always shut off the

gasoline engine and relieve all air pressure from the system before performing any service on the air compressor. 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 parts are very hot, do not touch (see the Hot Surfaces identified in Fig.

2). Allow compressor to cool prior to servicing.

1. Ensure engine START/RUN/OFF switch (C) is in the OFF position.

2. Allow the unit to cool.

3. Disconnect spark plug wire.

4. Drain air tank.

5. Remove the front of the

beltguard by removing the screws and washers (V) using a Torx T25 bit.

6. Mark pump position on saddle.

7. Loosen the engine mounting screws and slide the engine toward the air compressor.

8. Remove the belt and replace with a new one.

9. See the Adjusting Belt Tension before tightening engine mounting screws.

10. Reconnect spark plug wire.

Adjusting Belt Tension

1. Ensure engine START/RUN/OFF switch (C) is in the OFF position.

2. Allow the unit to cool.

Downward Force

Deflection

3. Disconnect spark plug wire.

4. Drain air tank.

5. Slide engine into original position, line the engine up with the mark made earlier on saddle.

6. Tighten two outside

engine mounting screws enough to hold the engine in place for

checking pulley and flywheel alignment.

7. 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.

8. When proper belt tension is achieved, tighten all four engine mounting screws. Torque to 15-22 ft-lbs (20.3–29.8 Nm).

9. Reconnect spark plug wire.

Pulley and Fly wheel Alignment

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.

The air compressor flywheel and engine 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:

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1. Ensure engine START/RUN/OFF switch (C) is in the OFF Position.

2. Allow the unit to cool.

3. Disconnect spark plug wire.

4. Drain air tank.

5. Remove belt guard.

6. Place a straightedge against the outside of the flywheel and the engine drive pulley.

7. 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).

8. If the difference is greater than 1/16” (1.6 mm) loosen the set screw holding the engine drive pulley to the shaft and adjust the pulley’s position on the shaft until the A1 and A2 measurements are within 1/16” (1.6 mm) of each other.

9. Tighten the engine drive pulley set screw.

10. Visually inspect the engine drive pulley to verify that it is perpendicular to the drive engine shaft. Points B1 and B2 of Figure should appear to be equal. If they are not, loosen the setscrew of the engine drive pulley and equalize B1 and B2, using care not to disturb the belt alignment performed in step 2.

11. Retighten the engine drive pulley setscrew. Torque to

145–180in lbs (16.4–20.3Nm).

12. Reinstall belt guard.

13. Reconnect spark plug wire.

Air Compressor Pump Intake and Exhaust

Valves

Once a year have a Trained Service Technician check the air compressor pump intake and exhaust valves.

Inspect Air Lines and Fittings for Leaks

1. Ensure engine START/RUN/OFF switch (C) is in the OFF Position.

2. Allow the unit to cool.

3. Disconnect spark plug wire.

4. Apply a soap solution to all air line fittings and connections/ piping.

5. Correct any leaks found.

6. Reconnect spark plug wire.

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: To avoid personal injury, always shut off the gasoline engine and relieve all air pressure from the system before performing any service on the air compressor. Do not use the unit with the shrouds or belt guard removed. Serious injury could

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occur from contact with moving parts. Hot surfaces. Risk of burn. 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.

ToReplaceorCleanCheckValve

1. Ensure engine START/RUN/OFF switch (C) is in the OFF Position.

2. Allow the unit to cool.

3. Disconnect spark plug wire.

4. Release all air pressure from air tank. See Draining Air Tank in the Maintenance section.

5. 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.

6. Using an adjustable wrench loosen pressure relief tube nut at air tank. Carefully move pressure relief tube away from check valve.

7. Unscrew the check valve (turn counterclockwise) using a 7/8” open end wrench. NOTE the orientation for reassembly.

8. Using a screwdriver, carefully push the valve disc up and down. NOTE: The valve disc should move freely up and down on a spring which holds the valve disc in the closed position, if not the check valve needs to be cleaned or replaced.

9. Clean or replace the check valve. A solvent, such as paint or varnish remover can be used to clean the check valve.

10. Apply sealant to the check valve threads. Reinstall the check valve (turn clockwise).

11. Replace the pressure release tube. Tighten nuts.

12. Replace the outlet tube and tighten nuts.

13. Reconnect spark plug wire.

14. Perform the Break-in Procedure. See Break-in Procedure in the Operation section.

Additional Service

Disassembly or service of the air compressor beyond what is covered in this manual is not recommended. If additional service is required, contact your nearest Authorized Warranty Service Center.

Accessories

Recommended accessories for use with your tool are available for purchase from your local dealer or authorized service center. If you need assistance in locating any accessory for your tool, please call 1-888-895-4549 or visit our website www.dewalt.com.

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.

Service Information

Please have the following information available for all service calls: Model Number ____________ Serial Number ___________ Date and Place of Purchase ____________________________

Repairs

To assure product SAFETY and RELIABILITY, repairs, maintenance and adjustment should be performed by a DeWALT factory service center, a DeWALT authorized service center or other qualified service personnel. Always use identical replacement parts.

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Limited Warranty

DEWALT Industrial Tools are warranted from date of purchase. 2 Year – Limited warranty on oil-lubricated air compressor

pumps. 1 Year – Limited warranty on all other air compressor

components. This warranty is not transferable to subsequent owners.

DEWALT will repair or replace, without charge, at DEWALT’s option, any defects due to faulty materials or workmanship. For further detail of warranty coverage and warranty repair information, call 1-(888)-895-4549 or visit dewalt.com. This warranty does not apply to accessories or damage caused where repairs have been made or attempted by others. This warranty also does not apply to merchandise sold by DEWALT which has been manufactured by and identied as the product of another company, such as gasoline engines. Such manufacturer’s warranty, if any, will apply. ANY INCIDENTAL, INDIRECT OR

CONSEQUENTIAL LOSS, DAMAGE OR EXPENSE THAT MAY RESULT FROM ANY DEFECT, FAILURE OR MALFUNCTION OF THE PRODUCT IS NOT COVERED BY THIS WARRANTY. Some

states do not allow the exclusion of limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you. IMPLIED WARRANTIES, INCLUDING THOSE

OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE LIMITED TO ONE YEAR FROM THE DATE OF ORIGINAL PURCHASE. Some states do not allow limitations on

how long an implied warranty lasts, so the above limitations may not apply to you.

What the Company Will Do: (the company) will cover parts and labor to remedy substantial defects due to materials and workmanship during the rst year of ownership, with the

exceptions noted below. Parts used in repair of whole goods or accessories are warranted for the balance of the original warranty period.

What is not covered Under This Warranty? Failures by the original retail purchaser to install, maintain, and operate said equipment in accordance with standard industry practices. Modications to the product, or tampering with components, or failure to comply with the specic recommendations of the Company set forth in the owner’s manual, will render this warranty null and void. The Company shall not be liable for any repairs, replacements, or adjustments to the equipment, or any costs for labor performed by the purchaser without the Company’s prior written approval. The effects of corrosion, erosion, surrounding environmental conditions, cosmetic defects, and routine maintenance items, are specically excluded from this warranty. Routine maintenance items such as: oil, lubricants, and air lters, as well as changing oil, air lters, belt tensioning, etc… fall under the owner’s responsibility. Additional exclusions include: freight damage, failures resulting from neglect, accident, or abuse, induction motors when operated from a generator, oil leaks, air leaks, oil consumption, leaky ttings, hoses, petcocks, bleeder tubes, and transfer tubes.

• The following components are considered normal wear items and are not covered after the rst year of ownership: Belts, sheaves, ywheels, check valves, pressure switches, air unloaders, throttle controls, electric motors, brushes, regulators, o-rings, pressure gauges, tubing, piping, ttings, fasteners, wheels, quick couplers, gaskets, seals, air lter housings, piston rings, connecting rods, and piston seals.

• Labor, service calls, and travel charges, are not covered

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after the rst year of ownership on stationary compressors (compressors without handles, or wheels). Repairs requiring overtime, weekend rates, or any other charges beyond the standard shop labor rate are not covered.

• Time required for orientation training for the service center to gain access to the product, or additional time due to inadequate egress.

• Damage caused by incorrect voltage, improperly wired, or failure to have a certied licensed electrician install the compressor, will render this warranty null and void.

• Damage caused from inadequate lter maintenance.

• Pump wear or valve damage caused by using oil not specied.

• Pump wear or damage caused by any oil contamination.

• Pump wear or valve damage caused by failure to follow proper maintenance guidelines.

• Operation below proper oil level or operation without oil.

• Gas Engines, if product is equipped with a gas engine, see engine manual for specic engine manufacturer’s warranty coverage.

Parts purchased separately: The warranty for parts purchased separately such as: pumps, motors, etc., are as follows:

From Date of Purchase

• All single & two stage pumps 1 year

• Electric motors 90 days

• Universal motor/pump 30 days

• All other parts 30 days

• No return authorization will be issued for electrical components once items are installed.

How do You Get Service? In order to be eligible for service under this warranty you must be the original retail purchaser, and provide proof of purchase from one of the Company’s dealers, distributors, or retail outlet stores. Portable compressors or components must be delivered, or shipped, to the nearest Authorized Service Center. All associated freight costs and travel charges must be borne by the consumer. Please call our toll free number 1-888-895-4549 for assistance.

THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND YOU MAY ALSO HAVE OTHER RIGHTS WHICH VARY FROM

STATE TO STATE.

THE COMPANY MAKES NO OTHER WARRANTY OR REPRESENTATION OF ANY KIND WHATSOEVER, EXPRESSED OR IMPLIED, EXCEPT THAT OF TITLE. ALL IMPLIED WARRANTIES, INCLUDING ANY WARRANTY OF MERCHANTABILITY AND FITNESS FOR PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. LIABILITY FOR CONSEQUENTIAL

AND INCIDENTAL DAMAGES UNDER ANY AND ALL

WARRANTIES, OTHER CONTRACTS, NEGLEGENCE, OR OTHER TORTS IS EXCLUDED TO THE EXTENT EXCLUSION IS PERMITTED BY LAW.

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Troubleshooting Guide

This section provides a list of the more frequently encountered malfunctions, their causes and corrective actions. The operator or maintenance personnel can perform some corrective actions, and others may require the assistance of a qualified DeWALT technician or your dealer.

Excessive air tank pressure-safety valve pops off ......................................................................1

Air leaks .................................................................................................................................... 2

Continuous air leak at unloader valve. ...................................................................................... 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

Compressor is not supplying enough air to operate accessories ............................................ 2, 7, 8, 9, 10, 12, 13

Restricted air intake. .................................................................................................................. 12

Excessive vibration .................................................................................................................... 14, 15

Knocking Noise ......................................................................................................................... 13, 14, 15, 16, 17, 18, 19

Excessive belt wear ................................................................................................................... 13,14,16,19,20

Squealing sound ........................................................................................................................ 13

Engine will not run ..................................................................................................................... 22, 24, 30

Moisture in pump crankcase ..................................................................................................... 5, 11, 23, 24, 25, 26, 27, 28

Pump will not run.......................................................................................................................29

Air tank pressure will not build .................................................................................................. 29

Troubleshooting Codes

CODE POSSIBLE CAUSE POSSIBLE SOLUTION

1 Unloader valve does not release pressure when air

tank reaches blow-offpressure

Unloader valve must be replaced. Contact a DeWALT factory service center or a DeWALT authorized service center.

2 Fittings are not tight Tighten fittings where air can be heard escaping. Check fittings

with soapy water solution. DO NOT OVERTIGHTEN.

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CODE POSSIBLE CAUSE POSSIBLE SOLUTION

3 Defective unloader valve

Turn off engine, rotate manual lock unloader lever to the closed perpendicular position. If air leaks out of air tank through unloader valve, replace unloader valve.

4 Defective air tank Air tank must be replaced. Do not repair the leak.

WARNING: Risk of bursting. Do not drill into, weld or otherwise modify air tank or it will weaken. The air tank can rupture or explode.

5 Leaking seals Contact a DeWALT factory service center or a DeWALT authorized

service center.

6 Defective safety valve Operate safety valve manually by pulling on ring. If valve still

leaks, it must be replaced.

7 Prolonged excessive use of air Decrease amount of air usage. 8 Compressor is not large enough for accessory Check the accessory air requirement. If it is higher than the SCFM

or pressure supplied by your air compressor, a larger compressor is needed to operate accessory.

9 Hole in air hose Check and replace air hose, if required.

10 Unloader valve restricted Remove, clean or replace.

11 Unit operating in damp or humid conditions Move unit to a dry well ventilated area. 12 Restricted air intake filter Clean or replace air intake filter.

13 Loose belt

Check belt tension, see Adjusting Belt Tension under

Maintenance.

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CODE POSSIBLE CAUSE POSSIBLE SOLUTION

14 Engine mount ing bolts are loose Tighten mounting screws. Torque engine mounting bolts to

15– 22 ft-lbs (20.3– 29.8 Nm).

WARNING: Risk of bursting. Excessive vibration could weaken the air tank and cause it to rupture or explode. Mounting screws must be kept tightened.

15 Pump stabilizer bracket bolts are loose Check bolt and tighten if required. Torque pump stabilizer bracket

bolt to 15– 22 ft-lbs (20.3-29.8 Nm).

WARNING: Risk of bursting. Excessive vibration could weaken the air tank and cause it to rupture or explode. Stabilizer bracket bolt must be kept tightened. Never operate the unit unless equipped with the stabilizer bracket.

Loose pulley Tighten pulley set screw, torque to 145–180 in.-lbs. (16.4– 20.3Nm).

Loose flywheel Tighten flywheel screw, torque to 15–18 ft.-lbs.

(20.3–24.4 Nm).

Carbon build-up in pump Contact a DeWALT factory service center or a DeWALT authorized

service center.

Belt to tight

Check belt tension, see Adjusting Belt Tension under

Maintenance.

Pulley misalignment

See MotorPulley/FlywheelAlignmentunder Maintenance.

Engine problem Contact a DeWALT factory service center or a DeWALT authorized

service center.

Engine or pump oil is low

Add DeWALT synthetic compressor oil to pump. See Compressor PumpOil under Maintenance.

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CODE POSSIBLE CAUSE POSSIBLE SOLUTION

Detergent type oil being used in pump Drain oil and refill pump with synthetic blend non-detergent air

compressor oil.

Extremely light duty cycles Run unit for longer duty cycles. It is recommended to run at high

throttle 50-75% of the run time and idle for 25% of the run time.

Piston rings damaged or worn Contact a DeWALT factory service center or a DeWALT authorized

service center.

Cylinder or piston damaged or worn Contact a DeWALT factory service center or a DeWALT authorized

service center.

Compressor cylinder finish worn Contact a DeWALT factory service center or a DeWALT authorized

service center.

Water in pump oil Drain oil and refill pump with synthetic blend non-detergent air

compressor oil.

Manual lock unloader lever in open position Rotate manual lock unloader lever to the closed perpendicular

position.

Engine fuel tank empty Add gasoline, see engine's instruction manual for correct proce-

dure.

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GLOSSARY

CFM: Cubic feet per minute. SCFM: Standard cubic feet per minute; a unit of measure of air

delivery. PSI: Pounds per square inch; a unit of measure of pressure. Code Certification: Products that bear one or more of the fol-

lowing 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.

CaliforniaCode: Unit may comply with California Code 462 (l) (2)/ (M) (2). Specification/model label is on the side of the air tank on units that comply with California Code.

UnloaderBlow-OffPressure: All models are continuous running units controlled by air tank pressure. When the maximum air tank pressure is obtained, the unloader valve will blow-off. This will cause the compressor to exhaust the air to the atmosphere and not the tank. This decreases the load on the engine and allows it to run at a near no-load condition.

UnloaderReset Pressure: When the air tank pressure drops to a predetermined point, the unloader valve closes. The air tank pressure will now increase until it reaches the unloader blow-off pressure.

FREE WARNING LABEL REPLACEMENT: If your warning labels become illegible or are missing, call 1-888-895-4549 for a free replacement.

+ 70 hidden pages

DeWalt DXCMH1393075 Instruction Manual

Specifications and Main Features

Frequently Asked Questions

User Manual