Question about Dewalt 3700 Pressure Washer

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How do you replace the pull cord on a dewalt 3750 psi pressure washer

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6ya6ya
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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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  • 1388 Answers

SOURCE: I have a dewalt 3750

I worked at a tool rental center while attending college and learned many tips and tricks about Dewalt and other brand pressure sprayers. Your machine probably has a 13 hp honda and has max pressure of about 3500 to 3700 psi. Most of the problems that customers had were engine related due to severe working conditions including totally wet engine /plug, wet air filter, and or other problems that were easy to remedy. We would set the pressure regulator to minimum pressure and explained to the customer how to increase the pressure as necessary but only after the engine was completely warmed-up to running temp to prevent engine stall. Your machine has a throttle lever between the tank and carb that should be set to max if you are going to set pressure at or neer max range. Most cleaning jobs do not need much pressure. Use lowest pressure to get the job done. Your engine developes around 13hp at about 3600rpm. If you want to maximize the life of you sprayer, then use your machine at about 70% of capacity or about 2000 to 2500 range that will allow you to run your engine slower increasing lifespan. Your sprayer is likely rated at 4 gallons per minute so make sure that the tip is that capacity. The tip has the size stamped which would show the fan degree and flow in gpm. The wrong tip, say a 3.5 gpm will strain the engine to point of stop because the smaller tip increases pressure. Most engine stall is due to high pressure setting on new machines. Lower pressure when warming-up machine and use max pressure rarely when necessary to max life. Please email for other information/questions or simple tests to determine faulty parts, good luck.

Posted on Jan 30, 2009

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  • 2 Answers

SOURCE: I have had two dewalt pressure washers in the last

First off are you taking it to a factory owned or an authorized service center? There is a big difference in the quality of service that you receive. A lot of times DeWALT gets a bad rap because of poor service from authorized service centers. IF you take it to a DeWALT owned center they have guaranteed repair cost and will take good care of you. Next question how old are these units? Where is the leak? How often are you using them-ie how many hours per day, week....Also the oil leak is it in the engine or pump? Neither of those are manufactured by DeWALT they buy the engine from Honda and the pump on yours should be a general-so how could that be DeWALTS fault?

Posted on Apr 07, 2009

nova2nv
  • 197 Answers

SOURCE: cannot get it to uptake the bleach for spraying

On most pressure washers you wont be able to draw soap/bleach into pump unless you are spraying on low pressure.There is a valve on the inside of inlet hose fitting that closes when high back pressure is sensed.Would it draw bleach into hose when wand tip is removed?

Posted on Nov 21, 2009

puertobori
  • 7733 Answers

SOURCE: Dewalt 3800 PSI operates great

When you pull to start squeeze the water hose tigger until start.

Posted on Oct 03, 2010

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1 Answer

How do i change the oil in my dewalt 3750 pressure washer 4.0 gpm


It not going to be the oil but is either the check valves or water packing if not both.

The time you need to change the oil is if it is water contaminated.

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Just pull out the suspect plug and replace with same.

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The engine runs but the water will not come out under pressure


You must have blown out the cones (thats how the water gets compressed inside of pump) in the water pump-

You could try this though on the back of the washer right on top of the water pump is a black knob about the size of your hand that knob will adjust the pressure try turning it and see although I doubt that is the problem-

A pressure washer is not like a compressor you HAVE to pull the trigger every minute NEVER let it just sit there running without pulling the trigger to release the pressure that Dewalt 3800 psi washer you have is a great machine in fact we own 4 of them and they are pretty powerful and easy to damage if left running alone.

TY,

Perry Tradesman

Sep 05, 2014 | Dewalt 3800 PSI Pressure Washer

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Won't start


Are you saying that it WONT start or that you cannot pull the rope to get it to start?

May 15, 2013 | Dewalt 3800 PSI Pressure Washer

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What PSI will the simpson Model WS5040H maintain while in use? I have had difficulty getting anywhere close to the rated PSI on a DeWalt 4200 PSI unit. Idle the pressure stays at about 4200 but as soon...


Engine is difficult to start when cold
  1. Check the battery condition, battery state of charge and starter motor current draw. Replace the battery if marginal and the starter motor if the current draw is beyond specification.
  2. Check the battery cable condition. Clean the battery terminals and replace corroded or damaged cables.
  3. Check the fuel system for proper operation. A fuel pump with insufficient fuel pressure or clogged injectors should be replaced.
  4. Check the engine's tune-up status. Note the tune-up specifications and check for items such as severely worn spark plugs; adjust or replace as needed. On vehicles with manually adjusted valve clearances, check for tight valves and adjust to specification.
  5. Check for a failed coolant temperature sensor, and replace if out of specification.
  6. heck the operation of the engine management systems for fuel and ignition; repair or replace failed components as necessary.
Engine is difficult to start when hot
  1. Check the air filter and air intake system. Replace the air filter if it is dirty or contaminated. Check the fresh air intake system for restrictions or blockage.
  2. Check for loose or deteriorated engine grounds and clean, tighten or replace as needed.
  3. Check for needed maintenance. Inspect tune-up and service related items such as spark plugs and engine oil condition, and check the operation of the engine fuel and ignition management system.

May 09, 2011 | Simpson WS5040H Water Shotgun 5000 Psi...

1 Answer

Can I use a 200 gal. water tank that is not pressurized for my dewalt dp3900 3750 psi pressure washer? the manual says that you should use a water source that has a minimum of 20 psi 5 gallon per miniute....


Hello,
My name is Dane and I am going to help you solve your problem.
A pressure washer pump is lubricated by the water running though it. You never, ever even start one when not connected to an approved water source. If the manual says that it has to have that presure, don't risk it. I would get an auxillary pump and install on your tank.
Well, I hope I've helped. If you found this information useful, please leave me some THUMBS UP if you think I'm deserving! :-) Thank you! Dane

Dec 05, 2010 | Garden

1 Answer

Pull cord is locked. Was running fine and just


any oil in the engine? pull cords are easy to replace but sounds like you run out of oil and the engine locked up!

Jun 21, 2009 | Karcher 2500 PSI Pressure Washer

1 Answer

I have had two dewalt pressure washers in the last year. Both ended up having major oil leaks. I have read the instructions over and over and find nothing that I am doing wrong. Now on my 3750, dewalt is...


First off are you taking it to a factory owned or an authorized service center? There is a big difference in the quality of service that you receive. A lot of times DeWALT gets a bad rap because of poor service from authorized service centers. IF you take it to a DeWALT owned center they have guaranteed repair cost and will take good care of you. Next question how old are these units? Where is the leak? How often are you using them-ie how many hours per day, week....Also the oil leak is it in the engine or pump? Neither of those are manufactured by DeWALT they buy the engine from Honda and the pump on yours should be a general-so how could that be DeWALTS fault?

Mar 24, 2009 | Dewalt 3800 PSI Pressure Washer

2 Answers

I have a dewalt 3750 pressure washer, when I pull the trigger on the spray wand the engine dies


I worked at a tool rental center while attending college and learned many tips and tricks about Dewalt and other brand pressure sprayers. Your machine probably has a 13 hp honda and has max pressure of about 3500 to 3700 psi. Most of the problems that customers had were engine related due to severe working conditions including totally wet engine /plug, wet air filter, and or other problems that were easy to remedy. We would set the pressure regulator to minimum pressure and explained to the customer how to increase the pressure as necessary but only after the engine was completely warmed-up to running temp to prevent engine stall. Your machine has a throttle lever between the tank and carb that should be set to max if you are going to set pressure at or neer max range. Most cleaning jobs do not need much pressure. Use lowest pressure to get the job done. Your engine developes around 13hp at about 3600rpm. If you want to maximize the life of you sprayer, then use your machine at about 70% of capacity or about 2000 to 2500 range that will allow you to run your engine slower increasing lifespan. Your sprayer is likely rated at 4 gallons per minute so make sure that the tip is that capacity. The tip has the size stamped which would show the fan degree and flow in gpm. The wrong tip, say a 3.5 gpm will strain the engine to point of stop because the smaller tip increases pressure. Most engine stall is due to high pressure setting on new machines. Lower pressure when warming-up machine and use max pressure rarely when necessary to max life. Please email for other information/questions or simple tests to determine faulty parts, good luck.

Jan 30, 2009 | Dewalt 3800 PSI Pressure Washer

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