DeWalt Pressure Washer no power

texasvet

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This may not be the best place to post this, but I’ve got a DeWalt pressure washer with no pressure.

The engine starts OK & runs fine.

Any thoughts on where to start troubleshooting?
 

mechanic mark

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Gasoline or electric? Model & Serial #’s from engine & pump.
 

catbob

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Check your unloader valve, sometimes they bend or stick
 

ILENGINE

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Unloader valve followed by broken inlet or outlet check valves. Also have seen a few pressure washers, not Dewalt in these other cases but similar brand that makes the Dewalt where the key in the crankshaft comes out and the pump shaft doesn't turn.
 

StarTech

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And I had a bad venturi assembly on a AAA pump this year that no output pressure. First time I seen this.
1671376068771.png
 

ILENGINE

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And I had a bad venturi assembly on a AAA pump this year that no output pressure. First time I seen this.
View attachment 63017
Not had any with loss of pressure due to bad venturi check valves other than being stuck shut allowing no water flow.. Had had a few that would overpressure the pump and kill the engine when the check valve O ring split.. You can remove the check valve and keep using the washer It will operate fine without it.
 
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