DeWalt DH4240B Instruction Manual Download Page 1

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DH4240B
Pressure Washer

InstructIon ManuaL

If you have questions or comments, contact us.

1-877-FNA-GAS1 (1-877-362-4271)•www.dewaltpw.com

Summary of Contents for DH4240B

Page 1: ...DH4240B Pressure Washer Instruction Manual If you have questions or comments contact us 1 877 FNA GAS1 1 877 362 4271 www dewaltpw com ...

Page 2: ...essure hose Q High pressure pump DH4240B Pressure Washer Engine Refer to the engine instruction manual for location and operation of other engine controls Pump Specifications GENERAL PUMP TX1510A Oil Capacity 14 Ounces For best results pump oil designed specifically for pressure washers is recommended as these contain a rust inhibitor and an anti foaming agent If this oil is not available an SAE 3...

Page 3: ...nd GPM ratings determined in accordance with the Pressure Washers Manufacturers Association PWMA standard PW101 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 WARNING This product and ...

Page 4: ...tion 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 ...

Page 5: ... persons Store fuel in an OSHA approved con tain er in a se cure location away from work area Use of acids toxic or cor ro sive chemicals poisons in sec ti cides or any kind of flam ma ble solvent with this product could re sult in se ri ous injury or death Do not spray flammable liquids DANGER RISK TO BREATHING Asphyxiation What can happen How to prevent it Breathing ex haust fumes will cause se ...

Page 6: ...t it Your pressure washer operates at fluid pressures and velocities high enough to penetrate human and animal flesh which could result in amputation or other serious injury Leaks caused by loose fittings or worn or damaged hoses can result in injection injuries DO NOT TREAT FLUID INJECTION AS A SIMPLE CUT See a physician immediately Inspect the high pressure hose regularly Replace the hose immedi...

Page 7: ... secure trigger in pull back open position Danger RISK of unsafe operation What can happen How to prevent it Unsafe op er a tion of your pressure wash er could lead to se ri ous in ju ry or death to you or others Do not use chlorine bleach or any other corrosive compound Be come fa mil iar with the op er a tion and con trols of the pressure washer Keep operating area clear of all persons pets and ...

Page 8: ...pect the gun to kickback when triggered DANGER Risk of Injury or Prop er ty Damage When Transporting or storing What can happen How to prevent it Fuel or oil can leak or spill and could result in fire or breathing hazard Se ri ous in ju ry or death can re sult Fuel or oil leaks will dam age carpet paint or oth er surfaces in ve hi cles or trailers Oil could fill the cylinder and damage the engine ...

Page 9: ...revent over inflation High velocity fluid spray directed at pneumatic tire sidewalls such as found on automobiles trailers and the like could damage the sidewall resulting in serious injury On pressure washers rated above 1600 psi 11032 kPa use the widest fan spray 40º nozzle and keep the spray a minimum of 8 20 cm from the pneumatic tire sidewall Do not aim spray directly at the joint between the...

Page 10: ...tect eyes and skin from con tact with sprayed materials WARNING RISK OF elec tri cal Shock What can happen How to prevent it Spray di rect ed at elec tri cal outlets or switch es or ob jects con nect ed to an elec tri cal circuit could re sult in a fatal electrical shock Unplug any elec tri cal ly op er at ed product before attempting to clean it Direct spray away from electric out lets and switch...

Page 11: ...quipment used to inflate tires can fill small tires similar to these 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 Tools required Not included 1 2 13 mm open end wrench 1 2 13 mm socket or 1 2 13 mm wrench Hardware Included with your machine 1 Handle F 1 Le...

Page 12: ...zle holder B on the panel assembly A Colors on the panel identify nozzle location and spray pattern Refer to the following chart to choose the correct nozzle for the job to be performed Nozzle Color Spray Pattern Uses Surfaces Red 0 powerful pinpoint for very intense cleaning metal or concrete DO NOT use on wood Yellow 15 intense cleaning of small areas metal concrete or wood Green 25 intense clea...

Page 13: ... water through chemical injection system to rinse system thoroughly If chemicals remain in the pump it could be damaged Pumps damaged due to chemicals will not be covered under warranty Starting Warning To reduce the risk of injury read the pressure washer instruction manual and the engine instruction manual before starting pressure washer DANGER Risk of fluid injection and laceration When using t...

Page 14: ...rn the water source off 4 Verify the filter screen U is in water inlet of pump U The cone side faces out 5 Connect the cold water source V to pump inlet NOTE Water source must provide a minimum of 5 gallons per minute at 20 psi 138 kPa Warning To reduce the possibility of contamination always pro tect against backflow when connected to a potable water system 6 Connect high pressure hose P to pump ...

Page 15: ...age to pump will result 4 Turn water source off 5 Pull trigger on spray gun to relieve any water pressure in hose or spray gun 6 Refer to Storage for proper storage procedures MAINTENANCE WARNING Risk of burning When performing maintenance you may be exposed to hot surfaces water pressure or moving parts that can cause serious injury or death WARNING Risk of fire Always disconnect spark plug wire ...

Page 16: ...provided and back flush with clean water 5 Direct water supply into spray wand to back flush loosened particles for 30 seconds 6 Reassemble the nozzle to the wand 7 Reconnect spray wand to gun then turn on water supply 8 Start pressure washer and place spray wand into high pressure setting to test To Clean the Water Inlet Filter This filter screen U should be checked periodically and cleaned if ne...

Page 17: ...otected from dam age Caution Risk of personal injury Avoid placing hands between handle and frame when assembling to prevent pinching NOTICE Risk of property damage Always store and transport unit in an upright position 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 acc...

Page 18: ...een made or attempted by a repair center not authorized by FNA This warranty gives you specific legal rights and you may have other rights which vary in certain states or provinces For further details of warranty coverage and warranty repair information visit www dewaltpw com and click on Service and Support or call 1 877 FNA GAS1 1 877 362 4271 Latin America This warranty does not apply to produc...

Page 19: ...lons Per Minute The unit of measure for the flow rate of water PSI Pounds per Square Inch The unit of measure for water pressure Also used for air pressure hydraulic pressure etc kPa kilopascal Metric pressure measurement 1 kilopascal equal 1000 pascals Quick connect spray wand Allows the user to quickly change out high pressure nozzles Refer to Spray Wand Nozzles Thermal relief valve When the tem...

Page 20: ...al use 22 23 24 Water leaking at gun spray wand connection 25 26 Water leaking at pump 25 26 27 28 Oil leaking at pump 29 30 31 32 33 34 35 Pump Pulsates 12 Troubleshooting Codes Code possible cause POSSIBLE SOLUTION 1 No fuel Add fuel 2 Low oil Add required amount of oil 3 Pressure builds up after two pulls on the recoil starter or after initial use Squeeze gun trigger to relieve pres sure 4 Chok...

Page 21: ...to the No Choke po si tion 16 High pressure hose is too long Use high pressure hose under 100 feet 30 48 m Lengthen water supply hose instead of high pressure hose 17 Spray wand not in low pressure See Spray Wand Nozzles under Operation 18 Chemical filter clogged Clean filter 19 Chemical screen not in cleaning solution Make sure end of chemical hose is fully submerged into cleaning solution 20 Che...

Page 22: ...g o ring Check and replace 33 Pump overfilled Check for correct amount 34 Incorrect oil used Drain and fill with correct amount and type of oil 35 Vent plug is clogged Clean vent plug blow air through it to remove any blockage If prob lem per sists replace plug 36 Air filter filled with oil Clean air filter element Refer to engine instruction manual for correct procedure Troubleshooting Codes cont...

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