DeWalt DCPW550, Instruction Manual

English

12

Nozzle (Fig. A, H)

If the nozzle becomes clogged with foreign materials, such as 
dirt, excessive pressure may develop. If the nozzle becomes 
partially clogged or restricted, the pump pressure will 
pulsate. Clean the nozzle immediately.

1.  Shut off the power cleaner 

 2 

 and turn off the 

water supply.

2.  Pull trigger 

 6 

 on main handle 

 1 

 to relieve any 

water pressure.

3.  Remove the nozzle from the spray wand 

 8 

 by pulling 

the quick connect collar 

 9 

 toward the spray wand.

Cleaning

WARNING:

 Blow dirt and dust out of all air vents with 

clean, dry air at least once a week. To minimize the risk 
of eye injury, always wear ANSI Z87.1 approved eye 
protection when performing this procedure.

WARNING:

 Never use solvents or other harsh 

chemicals for cleaning the non‑metallic parts of the 
tool. These chemicals may weaken the plastic materials 
used in these parts. Use a cloth dampened only with 
water and mild soap. Never let any liquid get inside the 
tool; never immerse any part of the tool into a liquid.

MAINTENANCE

WARNING: To reduce the risk of serious personal 

injury, turn unit off and remove the battery pack 

before making any adjustments or removing/

installing attachments or accessories.

 An 

accidental start‑up can cause injury.

Shutdown (Fig. A)

1.  To stop the power cleaner, release the trigger and remove 

the battery.

2.  Turn off water at the faucet.
3.  Discharge residual pressure by squeezing the trigger 

 6 

until no more water comes out of the spray wand 

 8 

.

4.  Disconnect the garden hose from the water intake 

 3 

 and 

drain hose.

5.  Remove garden hose from power cleaner by pulling 

back the collar on the quick connect hose adapter and 
removing it from the quick connect filter.

Cleaning a Surface (Fig. L)

WARNING:

 Risk of injury from spray. Always engage 

the trigger lock when gun is not in use. Failure to do so 
could cause accidental spraying.

Preparing the Power Cleaner (Fig. L)

iMPORTAnT: 

Disengage the trigger lock‑off 

 4 

, squeeze the 

trigger 

 6 

 and hold the trigger for 30 seconds to purge the 

system of air. If air is still found in the water stream, continue to 
run water through the spray handle.

1.  Disengage the trigger lock‑off 

 4 

 .

2.  Squeeze the trigger 

 6 

. 

Preparing Power Cleaner Unit for Use

DANGER:

 Risk of fluid injection and laceration. 

When using the high‑pressure setting, DO NOT allow 
the high‑pressure spray to come in contact with 
unprotected skin, eyes, or with any pets or animals. 
Serious injury will occur.

CAUTION:

 Before operation:

•  Connect the water supply to the power cleaner. 

For instructions on connecting the water supply 
to the power cleaner, please refer to 

Attaching

garden or suction hose 

under 

Assembly 

and Adjustments

.

•  Connect the pressure spray wand, soap bottle, 

or other attachment. For instructions on 
connecting the pressure spray wand, please 
refer to

 To Attach the spray Wand, soap 

Bottle or other Attachment

  under 

Assembly 

and Adjustments

.

Pressure Washing

Preparing Surface for Cleaning

•  Remove objects from the area which could create 

a hazard. 

•  Ensure that all doors and windows are closed tight. Protect 

all plants and trees in the adjacent area with a drop cloth 
ensuring that they will not be harmed by any overspray.

•  Pre‑rinse cleaning area with fresh water.
•  Use only detergents formulated for pressure washers.
•  Always test detergent in an inconspicuous area before use.

Speed Selector (Fig. A, K)

This power cleaner gives you the choice to operate at a lower 
pressure for more delicate jobs, or accelerate the power 
cleaner speed for high‑performance cleaning.

To accelerate, 

pull the speed selector 

 19 

 back toward the 

main handle 

 1 

 into the "HI" position. This mode is best for 

applications that need higher PSI.

For low pressure

, push the speed selector forward toward 

the spray wand 

 8 

 into the "LO" position. This mode is best 

for larger projects that require more time to complete.

nOTE:

 When in "HI" mode, runtime will be decreased as 

compared to when pressure cleaner is in "LO" mode.

1.  To start the power cleaner, disengage the trigger 

lock‑off 

 4 

 and squeeze the trigger 

 6 

. 

nOTE: 

The best angle for spraying water against a 

cleaning surface is 45 °. Spraying head on tends to cause 
dirt particles to embed in the surface. When working on 
vertical surfaces, it is best to apply detergent starting at 
the bottom and working upwards which will prevent the 
detergent from sliding down and causing streaks.

2.  To stop the power cleaner, release the trigger.

nOTE:

 Excessive pump pressure may be the result of a 

clogged nozzle or brass coupling. Always turn off the power 
cleaner and remove the battery before attempting to unclog 
a nozzle or brass coupler.

WARNING:

 Never draw from water that contains 

chemicals. Only draw from fresh water sources.