DEWALT DXCMTA6590412 Gas Portable Air Compressor Instruction Manual

June 3, 2024
Dewalt

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DEWALT DXCMTA6590412 Gas Portable Air Compressor

DEWALT-DXCMTA6590412-Gas-Portable-Air-Compressor-
product

Air Compressor

  • A. Pump Air Intake Filter
  • B. Engine Air Filter
  • C. Engine On/Off Switch
  • D. Air Tank Pressure Gauge
  • E. Regulated Pressure Gauge
  • F. Pressure Regulator
  • G. Air Outlet
  • H. Unloader Valve
  • I. Safety Valve
  • J. Air Tank Drain Valve(s)
  • K. Fixed Throttle
  • L. Choke Control
  • M. Fuel Valve Lever
  • N. Starter GripDEWALT-DXCMTA6590412-Gas-Portable-Air-Compressor-fig-1

Pump Specifications

  • Oil-Free
  • Single stage
  • Direct Drive

Engine Specifications

  • Kohler 196 cc
  • Internal Combustion
  • 4-stroke

Specifications

MODEL DXCMTA6590412
WEIGHT 75 lbs. (34.0 kg)
HEIGHT 20.1″ (510,5 mm)
WIDTH 20.9″ (530,9 mm)
LENGTH 23.2″ (589,3 mm)
AIR TANK CAPACITY 4 gallons (15.1 liters)
APPROX. BLOW OFF PRESSURE 155 psi
SCFM @ 90 PSI 5.0 *
* Tested per ISO 1217

Hot Surfaces

Definitions: Safety Guidelines
The definitions below describe the level of severity for each signal word. Please read the manual and pay attention to these symbols.

  • DANGER : Indicates an imminently hazardous situation that, if not avoided, will result in death or serious injury.
  • WARNING : Indicates a potentially hazardous situation that, 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.
  • 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 follow all directions for CO alarm before using. If you start to feel sick, dizzy or weak at any time, move to fresh air immediately. See a doctor. You could have carbon monoxide poisoning.

WARNING

  • 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 spark-arresting muffler. If the product is not equipped and will be used around flam ma blame materials or on land covered with materials such as agricultural crops, forest, brush, grass or other similar items, then an approved 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 sections 4442 and 4443 of the California Public Resources Code, unless the engine is equipped with a spark arrester, as defined in section 4442, and maintained in ef fective working order. Spark arresters are also required in some U.S. For est Service land and may also be legally required under other statutes and or di nances.
  • 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.
  • WARNING: The engine exhaust from this product contains chemicals known to the State of California to cause cancer, birth defects or other reproductive harm.
    SAVE THESE INSTRUCTIONS

DANGER: RISK OF EXPLOSION OR FIRE

WHAT CAN HAPPEN

  • Spilled gas o line and it’s vapors can become ignited from cigarette sparks, elec-trical arcing, exhaust gas es and hot engine components such as the muffler.
  • Heat will expand fuel in the tank which could result in spillage and pos si ble fire or explosion.

HOW TO PREVENT IT

  • Shut off the engine and allow it to cool before adding fuel to the tank.
  • Use care in filling tank to avoid spilling fuel. Move unit away from the fueling area before starting the engine.
  • Keep the maximum fuel level 1/2″ (12.7 mm) below the bottom of filler neck to allow for expansion.
  • Combustible materials which come into contact with hot engine parts can become ignited.
  • Improperly stored fuel could lead to accidental ignition. Fuel improperly secured could get into the hands of children or other unqualified persons.
  • 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.
  • Add fuel outdoors in a well-ventilated area. Make sure there are no sources of ignition, such as cigarettes near the refueling location.
  • Operate the 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 the compressor in an open area away from dry brush, weeds or other combustible materials.
  • Store fuel in an OSHA-ap-proved container, in a secure location away from the work area.
  • Always remain in attendance with the product when it is operating.

DANGER: RISK TO BREATHING (ASPHYXIATION)

WHAT CAN HAPPEN

  • Breathing exhaust fumes will cause serious injury or death! Engine exhaust contains carbon monoxide, an odorless and deadly gas.
  • 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.

HOW TO PREVENT IT

  • 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 the area of operation.

  • 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.

WARNING: RISK OF BURSTING

Air Tank:
On February 26, 2002, the U.S. Consumer Product Safety Commission published Release # 02-108 concerning air compressor tank safety: Air compressor receiver tanks do not have an infinite life. Tank life is dependent upon several factors, some of which include operating conditions, ambient conditions, proper installations, field 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 a 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

  • Failure to properly drain condensed water from air tank, causing rust and thinning of the steel air tank.
  • Modifications or attempted repairs to the air tank.
  • Unauthorized modifications to the unloader valve, safety valve, or any other components which control air tank pressure.

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.

HOW TO PREVENT IT

  • Drain the air tank daily or after each use. If the air tank develops a leak, replace it immediately with a new air tank or replace the entire compressor.
  • 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.
  • The air tank is designed to withstand specific operating pressures. Never make adjustments or parts substitutions to alter the factory set operating pressures.
  • Follow the equipment manufacturer’s recommendation and never exceed the maximum allowable pressure rating of attachments. Never use a compressor to inflate small low-pressure objects such as children’s toys, footballs, basketballs, etc.

Tires:

  • Overinflation of tires could result in serious injury and property damage.
  • Use a tire pressure gauge to check the tire 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 the 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 overinflation.

WARNING: RISK FROM FLYING OBJECTS

WHAT CAN HAPPEN

  • 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.

HOW TO PREVENT IT

  • 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, or attaching tools or accessories.

WARNING: RISK OF HOT SURFACES

WHAT CAN HAPPEN

  • Touching exposed metal such as the engine head, engine exhaust or outlet tubes, can result in serious burns.

HOW TO PREVENT IT

  • Never touch any exposed metal parts on the compressor during or immediately after operation. The compressor will remain hot for several minutes after the operation
  • Do not reach around protective shrouds or attempt maintenance until the unit has been allowed to cool.

WARNING: RISK FROM MOVING PARTS

WHAT CAN HAPPEN

  • The engine can start accidentally if the flywheel is turned by hand or moved by pulling on the starter rope.
  • Moving parts such as the pulley, flywheel, and belt can cause serious injury if they come into contact with you or your clothing.
  • Attempting to operate a compressor with damaged or missing parts or attempting to repair a compressor with protective shrouds removed can expose you to moving parts and can result in serious injury.

HOW TO PREVENT IT

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

  • Unsafe operation of your air compressor could lead to serious injury or death to you or others.

HOW TO PREVENT IT

  • Review and understand all instructions and warnings in this manual.
  • Be come familiar with the operation and controls of the air compressor.
  • Keep the 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 the area of operation with a fire extinguisher.
  • Do not op er ate machine with missing, broken, or unauthorized parts.
  • Never stand on the compressor.

FEATURES

UNLOADER VALVE
When the maximum air tank pressure is obtained, the unloader valve (H) will blow off. This will cause the compressor to exhaust the air to the atmosphere and not the tank. The valve is preset by the manufacturer and must not be removed or modified in any way.

Manual Lock:
The manual lock allows you to 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 H H buildup. Rotate the manual lock unloader lever to the closed position after starting the engine to allow air tank pressure to build.

NOTE:
Air OPEN CLOSED will not build in the tank when the manual lock unloader lever in the open position.

SAFETY VALVE
This valve (I) is designed to prevent system failures by relieving pressure from the system when the compressed air reaches a predetermined level. The valve is preset by the manufacturer and must not be removed or modified in any way. 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.DEWALT-
DXCMTA6590412-Gas-Portable-Air-Compressor-fig-5

AIR TANK DRAIN VALVES
The drain valve (J) is used to remove moisture from the air tank after the air compressor is shut off.

AIR TANK PRESSURE GAUGE
The air tank pressure gauge (D) indicates air pressure in the air tank.

REGULATED PRESSURE GAUGE
The regulated pressure gauge (E) indicates the air pressure available at the outlet side of the regulator. This pressure is controlled by the regulator and is always less or equal to the air tank pressure.

REGULATOR
The regulator knob (F) controls the air pressure coming from the air tank.

To Adjust Regulator:

  1. Turn the knob clockwise to increase regulated pressure and counterclockwise to decrease regulated pressure.

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.

THROTTLE CONTROL
When maximum air tank pressure 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.

INSTALLATION

INSTALLING HOSES

WARNING: Risk of unsafe operation. Firmly grasp hose in hand when installing or disconnecting to prevent hose whip.

  1. Ensure the regulated pressure gauge reads 0 psi.
  2. Apply sealant tape to hose threads.
  3. Assemble hose to air outlet (G).

NOTICE: Do not assemble splitters directly to the air outlet (G).

NOTE: Assembling quick connect bodies to air outlet (G) 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(s) from air outlet(s) (G).

Lubrication and Oil

ENGINE

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

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 the removal of moisture and oil vapor in compressed air is required. NOTICE: Always use an air line filter to remove moisture and oil vapor when spraying paint.

Location

DANGER:
Risk of breathing. Exhaust from the gasoline engine contains deadly carbon monoxide, which is odorless and toxic. Operate the 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 feet (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.

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 baffle walls. Contact a DEWALT service center or call 1-888-895-4549 for assistance.

TRANSPORTING

WARNING:
Risk injury from lifting. Unit weighs more than 70 lbs. (77.6 kg) Do not move or lift without assistance.

NOTICE:
Risk of property damage. Place engine fuel valve lever (M) in the OFF position before moving or transporting unit. When transporting the compressor in a vehicle, trailer, etc. ensure that the air tank is drained and the unit is secured and placed on a protective mat on a flat horizontal surface. DO NOT store in a standing position.

NOTE:
Should the unit tip over, hard starting and smoking will occur due to oil spillage.

PREPARATION FOR USE

Pre-Start Checklist (Fig. 1)

  1. Ensure engine ON/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 (J) is closed.

  4. Ensure safety valve (I) is functioning properly, see Checking Safety Valve under Maintenance.
    NOTICE: Do not operate without oil or with inadequate oil. DEWALT is not responsible for compressor failure caused by inadequate oil.

  5. Check the engine’s oil and fuel level, see the engine’s instruction manual for correct procedures.

  6. Ensure all guards, covers, and labels are in place, legible (for labels) and securely mounted. Do not use the compressor until all items have been verified.

Initial Set-up (Fig. 1)

WARNING:
Do not operate this unit until you read and understand 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 unloader valve has been replaced.

The procedure:

  1. Follow the Pre-Start Checklist under Preparation for Use.

  2. Rotate the unloader’s manual lock to the open position to prevent air tank pressure buildup.

  3. Open the pressure regulator. Rotate clockwise until it stops.
    WARNING: Do not operate this unit until you read and under

  4. Prepare the engine for first-time use, see the engine’s instruction manual for the correct procedure.

  5. Turn the engine ON/OFF switch (C) to the ON position.

  6. Place the fuel valve lever (M) in the ON position.

  7. 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. WARNING: Risk of unsafe operation. Pull the starter grip slowly until resistance is felt. Then pull starter grip (N) rapidly to avoid kickback and prevent hand or arm injury.
    NOTICE : Do not allow the starter grip to snap back. Return it gently by hand.
    NOTE : If the engine does not start, check the oil level and add oil as needed.
    NOTE : To ensure maximum oil lubrication, place the unit on a level surface.

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

  9. Rotate the manual lock on the unloader valve into the closed position so the air tank pressure can build.

  10. Close the pressure regulator. Rotate the regulator knob (F) counterclockwise to its built-in stop. This will allow air to build pressure in the air tank.

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

OPERATING PROCEDURES

Start-up (Fig. 1)

  1. Follow the Pre-Start Checklist under Preparation for Use.

  2. Turn the regulator knob (F) counterclockwise until fully closed. The regulated pressure gauge should read 0 psi.

  3. Rotate the manual lock unloader lever to the open position to assist with a start-up.

  4. Turn the engine ON/OFF switch (C) to the ON position.

  5. Place the fuel valve lever (M) in the ON position.

  6. 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.
    WARNING:
    Risk of unsafe operation. Pull the starter grip slowly until resistance is felt. Then pull starter grip (N) rapidly to avoid kickback and prevent hand or arm injury.
    NOTICE : Do not allow the starter grip to snap back. Return it gently by hand.
    NOTE : If the engine does not start, check the oil level and add oil as needed.
    NOTE : To ensure maximum oil lubrication, place the unit on a level surface.

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

  8. Rotate the manual lock unloader lever to the closed position to allow air tank pressure to build. NOTE: The pump will not operate with the manual lock unloader lever in the open position.

  9. Allow the compressor to pump up to blow off the pressure.
    WARNING : Risk of unsafe operation. If any unusual noise or vibration is noticed, stop the compressor and refer to the troubleshooting section.

  10. Attach hose and accessory.
    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.
    NOTICE : Risk of property damages. 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-operated tools or devices may require filtered air. Read the in instructions for the air tool or device.

  11. Adjust regulator (F) to the desired setting. See Regulator under Features.

Shut-down

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

  2. Place the fuel valve lever (M) in the OFF position.
    NOTE: If finished using a compressor, follow Steps 3–7.

  3. Turn the regulator knob (F) counterclockwise until fully closed. Ensure the regulated pressure gauge reads 0 psi.

  4. Remove the hose and accessory.

  5. Drain the air tank. See Draining Air Tank under Maintenance.
    NOTICE : Risk of property damage. Place engine fuel valve lever (M) in the OFF position before moving or transporting unit.
    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.

  6. Allow the compressor to cool down.

  7. Wipe air compressor clean and store in a safe, nonfreezing area.

MAINTENANCE

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

  1. Ensure engine ON/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 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| X| | | |
Inspect air filter| | X +| | |
Drain air tank| X| | | |
Oil leak inspection| X| | | |
Check for unusual noise/vibration| X| | | |
Check for air leaks| X*| | | |
Clean compressor exterior| | X| | |
Remove tank from service| | | | | X++
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.
    +  Perform more frequent in dusty or humid conditions.
    ++ For more information, call 1-888-895-4549

Checking Safety Valve (Fig. 1)

  • WARNING:
    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 the 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 when using the compressor.

Before starting the 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 Element (Fig. 1)

WARNING:
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 the compressor to cool prior to servicing.

  1. Ensure the engine ON/OFF switch (C) is in the OFF position.
  2. Allow the unit to cool.
  3. Remove filter (A).
  4. If the filter 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.
  5. Place the filter back in the filter base.

NOTICE: Risk of unsafe operation. Do not operate without air inlet filter.

Draining Air Tank (Fig. 1)

WARNING:
Risk of unsafe operation. Air tanks contain high-pressure air. Keep face and other body parts away from outlet of drain. Use 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 airflow 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 that may be regulated and must be disposed of in accordance with local, state, and federal laws and regulations.

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

  2. Turn the regulator counterclockwise to set the outlet pressure to zero.

  3. Remove the air tool or accessory.

  4. Pull ring on the safety valve allowing air to bleed from the tank until tank pressure is approximately 20 psi. Release safety valve ring.

  5. Drain water from air tank by opening the drain valve (counterclockwise) on the 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.

  6. After the water has been drained, close the drain valve (clockwise). 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.
  • NOTE : Tilt unit to drain tanks (B).
  • NOTE : In cold climates, drain the tanks after each use to reduce problems with freezing of water condensation.DEWALT-DXCMTA6590412-Gas-Portable-Air-Compressor-fig-10

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.

Limited Warranty

The Manufacturer warrants from the date of purchase.

1 Year – Limited on all oil-free compressors. This warranty is not transferable to subsequent owners.

The Manufacturer will repair or replace, without charge, at their 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 the Manufacturer which has been manufactured by and identified 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 THE 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 Manufacturer Will Do:
(the Manufacturer) will cover parts and labor to remedy substantial defects due to materials and workmanship during the first 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. Modifications to the product, or tampering with components, or failure to comply with the specific recommendations of the Manufacturer set forth in the owner’s manual, will render this warranty null and void. The Manufacturer 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 specifically excluded from this warranty. Routine maintenance items such as: oil, lubricants, and air filters, as well as changing oil, air filters, 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 fittings, hoses, drain valve, bleeder tubes, and transfer tubes.

  • The following components are considered normal wear items and are not covered after the first year of ownership: Belts, pulleys, flywheels, check valves, pressure switches, air unloaders, throttle controls, electric motors, brushes, regulators, o-rings, pressure gauges, tubing, piping, fittings, fasteners, wheels, quick couplers, gaskets, seals, air filter housings, piston rings, connecting rods, and piston seals.
  • Labor, service calls, and travel charges, are not covered after the first 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 inadequate filter maintenance.
  • Pump wear or damage caused by any oil contamination.
  • Pump wear or valve damage caused by failure to follow proper maintenance guidelines.
  • Gas Engines, if the product is equipped with a gas engine, see the engine manual for specific engine manufacturer’s warrant overage.

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 Manufacturer’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 MANUFACTURER 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 A PARTICULAR PURPOSE, ARE HEREBY DISCLAIMED. LIABILITY FOR CONSEQUENTIAL AND INCIDENTAL DAMAGES UNDER ANY AND ALL WARRANTIES, OTHER CONTRACTS, NEGLIGENCE, OR OTHER TORTS IS EXCLUDED TO THE EXTENT THAT EXCLUSION IS PERMITTED BY LAW.

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

WARNING
Before starting, read and understand the operator manual for safe operation and maintenance. For replacement, manual write to Compressor Service, 118 West Rock Street, Springfield, MN 56087

Risk of fire or explosion
Gasoline vapor is highly flammable. Refuel outdoors or in a well-ventilated area. DO NOT spray flammable liquid in a confined area or toward a hot surface. The spray area must be well-ventilated. DO NOT smoke while spraying or spray where a spark or flame is present. Arching parts – Keep the compressor at least 20 feet away from explosive vapors, such as when spraying with a spray gun.

Risk of carbon monoxide poisoning
Engine produces deadly exhaust. DO NOT run the compressor in an enclosed area.

GLOSSARY

  • CFM: Cubic feet per minute.
  • SCFM: Standard cubic feet per minute; a unit of measure of air delivery.
  • PSI: Pounds per square inch; a unit of measure of pressure.
  • Code Certification: Products that bear one or more of the following marks: UL®, CUL, ETL®, CETL, have been evaluated by OSHA-certified independent safety laboratories and meet the applicable 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.

Troubleshooting Guide

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

Problem/Code

  • Excessive air tank pressure-safety valve pops off ……………………………………………………………..1
  • 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………………………………………………………………………………………………………13
  • Knocking Noise………………………………………………………………………………………………………….. 6, 13
  • Engine will not run………………………………………………………………………………………………………. 14, 15, 16, 21
  • Pressure reading on the regulated pressure gauge drops when an accessory is used…………17
  • Regulator knob has continuous air leak………………………………………………………………………….18
  • Regulator will not shut off air outlet……………………………………………………………………………….18
  • Pump will not run………………………………………………………………………………………………………..19
  • Air tank pressure will not build………………………………………………………………………………………19, 20

Troubleshooting Codes

CODE POSSIBLE CAUSE POSSIBLE SOLUTION
1 Unloader valve does not release pressure when air tank reaches blow-off
pressure The 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 OVER-TIGHTEN.
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.
CODE| POSSIBLE CAUSE| POSSIBLE SOLUTION
---|---|---
13| Engine mounting bolts are loose| Tighten mounting screws. Torque engine mounting bolts to 10– 20 ft.-lbs. (13.5–27.1 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.

14| Air tank pressure is too high| Open the regulator and reduce air tank pressure to less than 40 psi.
15| Engine problem| Contact a DeWALT factory service center or a DeWALT- authorized service center.
16| Engine oil is low| See engine instruction manual.
17| It is normal for some pressure drop to occur| If there is an excessive amount of pressure drop when the accessory is used, adjust the regulator as instructed in Regulator under Features.

NOTE: Adjust the regulated pressure under flow conditions while accessory is being used.

18| Damaged regulator| Replace.
19| Manual lock unloader lever in open position| Rotate manual lock unloader lever to the closed perpendicular position.
20| Regulator open| Rotate the regulator knob counterclockwise to its built-in stop.
21| Engine fuel tank empty| Add gasoline, see engine’s instruction manual for correct procedure.

For product, service or warranty information contact us at:

1-888-895-4549
www.dewalt.com

The following are trademarks for one or more DEWALT power tools: the yellow and black color scheme; the “D” shaped air intake grill; the array of pyramids on the handgrip; the kit box configuration; and the array of lozenge shape humps on the surface of the tool.

References

Read User Manual Online (PDF format)

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