DEWALT DXPW3425 (01) PDF Document

The main components of the DEWALT DXPW3425 pressure washer are:

A. Panel assembly

B. Nozzle holder

C. Professional spray gun

D. Wheel

E. Quick-connect spray wand

F. Frame

G. Engine dipstick/oil plug

H. Engine switch

I. Starter grip

J. Engine

K. Throttle control lever

L. Choke control

M. Fuel valve lever

N. Gas cap

O. Handle assembly

P. High pressure hose

Q. High pressure pump

* Rated Pressure and Rated Water Flow is within manufacturing tolerance of (+/- 10%)

Engine Fuel: Use fresh, high-quality, unleaded gasoline with a pump octane rating of 86 or higher. Do not use fuel containing greater than 10% ethanol. Use of fuels with greater than 10% ethanol are not approved for use in this product per EPA regulations and will damage the unit and void the warranty.

Pump Oil: 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 15W-40 oil may be used.

1. Place the handle (O) onto the frame (F) and secure it with saddle bolts and knobs (R). Avoid placing hands between the handle and frame when assembling to prevent pinching.

2. Attach the high pressure hose (P) to the spray gun. Make sure it is secure.

3. Connect the wand (E) to the spray gun. Make sure the connection is secure.

4. Place the nozzle holder (B) onto the panel assembly (A) and push each nozzle holder into place.

5. Remove the five colored quick-connect nozzles from the plastic bag and insert them into the correct grommet on the nozzle holder. The nozzles are color-coded to match the colored nozzles on the panel assembly.

1. In a well-ventilated outdoor area, add fresh, high-quality, unleaded gasoline with a pump octane rating of 86 or higher. Do not overfill. Wipe up any spilled fuel before starting.

2. Check the engine oil level. Refer to the engine instruction manual for the correct procedure.

3. Check the pump oil level. The oil level should be at the dot in the middle of the sight glass.

4. Connect the water hose to the water source. Turn the water source on to remove all air from the hose. When a steady stream of water is present, turn the water source off. The water source must provide a minimum of 5 gallons per minute at 20 psi (138 kPa).

5. Verify the filter screen (U) is in the water inlet of the pump, with the convex side facing out.

6. Connect the cold water source (V) to the pump inlet.

7. Connect the high pressure hose (P) to the pump outlet.

8. If applying a chemical, refer to the “Chemicals and Cleaning Solvents” section.

9. Turn the water source on.

10. Remove all air from the pump and high pressure hose by depressing the trigger until a steady stream of water is present.

11. Turn the engine ON/OFF switch (H) to the ON position.

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

13. If the engine is cold, move the choke (L) to the CLOSED position.

14. Pull the starter grip (I) slowly until resistance is felt, then pull it rapidly to avoid kickback.

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

16. Depress the trigger on the gun to start water flow. Stand on a stable surface and grip the gun/wand firmly with both hands.

1. If chemicals were applied, place the chemical hose into a container of clean water and draw clean water through the chemical injection system to rinse it thoroughly.

2. Place the engine ON/OFF switch (H) to the OFF Position.

3. Place the fuel valve lever (M) in the OFF position.

4. Turn the water source off.

5. Pull the trigger on the spray gun to relieve any water pressure in the hose or spray gun.

6. Engage the trigger lock (X) when the gun is not in use to prevent accidental spraying.

7. Refer to the Storage section for proper storage procedures.

The pressure setting is preset at the factory. To lower the pressure, follow these instructions:

1. Back away from the surface to be cleaned. The further away you are, the less pressure will be on the surface.

2. Change to the 40° nozzle (white). This nozzle delivers a less powerful stream of water and a wider spray pattern.

NOTICE: Do not attempt to increase pump pressure. A higher pressure setting than the factory set pressure may damage the pump.

The nozzles are stored in the nozzle holder (B) on the panel assembly (A). Refer to the following chart to choose the correct nozzle for the job.

*** NOTICE: The high pressure spray from your pressure washer is capable of causing damage to surfaces such as wood, glass, automobile paint, auto striping and trim, and delicate objects such as flowers and shrubs. Before spraying, check the item to be cleaned to assure yourself that it is strong enough to resist damage from the force of spray.

Always turn the engine off before changing nozzles.

1. Pull the quick-connect coupler back and insert the nozzle.

2. Release the quick-connect coupler and twist the nozzle to make sure it is secure in the coupler.

Ensure the nozzle is completely inserted in the quick-connect socket and the quick-connect collar is fully engaged (forward) before squeezing the gun trigger to prevent injury from flying objects.

Applying chemicals is a low-pressure operation. Use only soaps and chemicals designed for pressure washer use. Do not use bleach.

1. Press the chemical hose (S) onto the barbed fitting located near the high pressure hose connection of the pump.

2. Place the other end of the chemical hose with the filter into the container holding the chemical/cleaning solution. For every 10 gallons of water pumped, 1 gallon of chemical solution will be used.

3. Install the low-pressure (black) nozzle into the quick connect fitting of the spray wand. Chemicals and soaps will not siphon if the black soap nozzle is not installed.

4. After use, place the chemical hose into a container of clean water and draw clean water through the injection system to rinse it thoroughly to prevent pump damage.

Change the pump oil after the first 50 hours of operation and every 100 hours thereafter, or every 3 months. The preferred oil is SIMPSON® Premium Pump Crankcase Oil, or an SAE 15W-40 oil if the former is not available.

To Check Oil:

The oil level should come to the dot in the middle of the sight glass (AA).

How to Change Pump Oil:

1. Loosen the pump oil fill plug (BB).

2. Place a container under the pump oil drain plug (CC).

3. Remove the pump oil drain plug.

4. After the oil is drained, replace the pump oil drain plug and tighten it securely.

5. Refill the pump with the recommended oil.

6. Replace the pump oil fill plug and tighten securely.

If the nozzle becomes clogged, excessive pressure may develop, and the pump pressure may pulsate. Clean the nozzle immediately.

1. Shut off the pressure washer and turn off the water supply.

2. Pull the trigger on the gun handle to relieve any water pressure.

3. Disconnect the spray wand from the gun.

4. Remove the high pressure nozzle from the spray wand. Remove any obstructions with the provided nozzle cleaning tool (Y) and back flush with clean water.

5. Direct the water supply into the spray nozzle to back flush loosened particles for 30 seconds.

6. Reassemble the nozzle to the wand.

7. Reconnect the spray wand to the gun and turn on the water supply.

8. Start the pressure washer and place the spray wand into a high pressure setting to test.

The filter screen (U) should be checked periodically and cleaned if necessary.

1. Remove the filter screen by grasping the end and removing it from the water inlet of the pump.

2. Clean the filter by flushing it with water on both sides.

3. Reinsert the filter into the water inlet of the pump. The convex side should face out.

NOTE: Do not operate the pressure washer without the filter properly installed.

Engine:

Consult the engine instruction manual for storage recommendations.

Pump:

When storing the unit for more than 30 days or when freezing temperatures are expected, use SIMPSON® / POWERWASHER® Pump Guard or an equivalent. This provides proper lubrication to the internal seals.

1. Turn off the pressure washer and disconnect hoses from the pump.

2. Unscrew the bottle valve from the Pump Guard bottle and remove the seal.

3. Screw the bottle valve back onto the bottle.

4. Attach the bottle to the water inlet of the pump.

5. Squeeze the bottle to inject the contents into the pump.

6. With the ignition switch off, simultaneously pull the starter rope and squeeze the bottle. Repeat until the protector fluid exits the pump outlet. This step may require two people.

Pressure Washer:

1. Drain all water from the high pressure hose, coil it, and store it in the cradle of the pressure washer handle.

2. With the nozzle pointed down and the spray gun and wand in a vertical position, squeeze the trigger to drain all water from the spray gun and wand. Store in the gun holder.

3. Store the chemical hose so it is protected from damage.

NOTICE: Always store and transport the unit in an upright position.

Risk of Carbon Monoxide Poisoning:

Using an engine indoors can kill you in minutes as the exhaust contains high levels of carbon monoxide (CO). NEVER use the engine inside homes, garages, or other partly enclosed areas. ONLY use outdoors and far away from open windows, doors, and vents.

Risk of Explosion or Fire:

Spilled gasoline can be ignited by sparks or hot components. Shut off the engine and let it cool before adding fuel. Move the pressure washer away from the fueling area before starting. Keep the maximum fuel level 1/2″ (12.7 mm) below the bottom of the filler neck to allow for expansion.

Risk to Breathing (Asphyxiation):

Engine exhaust fumes can cause serious injury or death. Operate in a well-ventilated area and never near a location occupied by humans or animals. Use only recommended cleaning fluids and follow manufacturer recommendations.

Risk of Fluid Injection and Laceration:

The high-pressure spray can penetrate skin. Inspect the high pressure hose regularly and replace if damaged. Never touch a leaking hose. Keep hands away from the nozzle and direct spray away from people.

Risk of Injury from Spray:

High-velocity spray can break objects, creating projectiles. Always wear ANSI-approved Z87.1 safety glasses and protective clothing. Never point the wand at people or animals.

Risk of Unsafe Operation:

Improper use can lead to serious injury. Familiarize yourself with the controls. Keep the operating area clear. Do not operate when fatigued. Do not compromise safety features or operate with missing parts.

Risk of Injury or Damage During Transport/Storage:

Fuel or oil can leak. If equipped, turn the fuel shut-off valve to OFF before transporting. Otherwise, drain the fuel. Always transport and store the unit in an upright position on a protective mat.

Risk of Electrical Shock:

Spraying electrical outlets can be fatal. Unplug any electrically operated product before cleaning it. Direct spray away from outlets and switches.

Risk of Chemical Burn:

Acids, flammable solvents, or toxic chemicals can cause serious injury. Do not spray such materials. Use only recommended household detergents and cleaners. Wear protective clothing.

Risk of Bursting Tires:

Over-inflation of tires can cause injury. Use a tire pressure gauge to check pressure before each use and while inflating. Add air in small increments.

Risk of Hot Surfaces:

Contact with hot engine components can cause serious burns. During operation, touch only the control surfaces. Keep children away.

Bypass mode: Allows water to re-circulate within the pump when the gun trigger is not pulled.

Chemical hose: Feeds cleaning agents into the pump to mix with the water.

Chemical injection system: Mixes cleaners or cleaning solvents with water to improve cleaning effectiveness.

Choke control: Opens and closes the carburetor choke valve.

CU: Cleaning Units. GPM multiplied by psi. (GPM x PSI = CU)

Fuel valve lever: Opens/closes the connection between the fuel tank and carburetor.

GPM: Gallons Per Minute. The unit of measure for the flow rate of water.

PSI: Pounds per Square Inch. The unit of measure for water pressure.

kPa (kilopascal): Metric pressure measurement. 1 kilopascal equals 1000 pascals.

Quick-connect spray wand: Allows the user to quickly change out high pressure nozzles.

Thermal relief valve: When the temperature inside the pump rises too high, the valve will open and release a gush of water to lower the temperature inside the pump. The valve will then close.

Water supply: All pressure washers must have a source of water. The minimum requirements for a water supply are 20 psi (138 kPa) and 5 gallons per minute.

If the engine on your DEWALT DXPW3425 will not start, check the following possible causes and solutions:

If you are experiencing no or low pressure, consider the following causes and solutions:

For initial use:

After a period of normal use: