Westinghouse WPX3400 Gas Pressure Washer User Manual

Westinghouse WPX3400 Gas Pressure Washer

WPX3400 Gas Pressure Washer

Specifications

• Pressure (PSI/BAR): 3400/234
• Flow Rate (GPM/LPM): 2.6/9.84
• Water Temperature: 104oF/40oC Max
• Hose Length (ft): 25
• Soap Tank Capacity (Gal/L): 0.42/1.6
• Engine Displacement (cc): 212
• Starting Type: Recoil
• Fuel Capacity (Gal/L): 0.87/3.3
• Fuel Type: *Ethanol content of 10% or less. DO NOT use E15 or E85.
• Oil Capacity (Oz/L): SAE 10W-30
• Spark Plug: F7TC
• Spark Plug Gap: Nozzles
• Nozzles: 0o, 15o, 25o, 40o, Soap
• Certifications:

Safety Definitions
The words DANGER, WARNING, CAUTION, and NOTICE are used throughout this manual to highlight important information. Make sure that the meanings of this safety information are known to all who operate, perform maintenance on, or are near the pressure washer.

Product Usage Instructions

Assembly
To assemble the pressure washer, follow these steps:

1. Open the carton and check the contents.
2. Install the handle.
3. Install the mounting foot and lower gun holder.
4. Install the upper gun holder.
5. Insert the spray nozzles.
6. Assemble the spray gun and hose.
7. Fill the oil.
8. Fill the fuel tank.
9. Connect the garden hose.

Operation
To operate the pressure washer, follow these steps:

1. Place the pressure washer in a suitable location.
2. Start the engine.
3. Stop the pressure washer.
4. Select the appropriate nozzle for your cleaning needs.
5. Change the nozzle if necessary.
6. Use spraying tips for specific cleaning applications.
7. Use detergent if required.
8. Transport the pressure washer if needed.

Maintenance
To maintain the pressure washer, follow these steps:

1. Follow the maintenance schedule provided in the manual.
2. Clean the pressure washer regularly.
3. Maintain the air filter.
4. Check the engine oil level regularly.
5. Change the engine oil when necessary.
6. Maintain the spark plug.
7. Service the spark arrestor if needed.
8. Store the pressure washer properly.
9. Perform winter storage procedures if applicable.
10. Check valve clearance if necessary.

FAQ

• Q: Can I return the product to the store?
  A: No, please call customer service at 855-944-3571 for assistance.

• Q: What safety precautions should I take?
  A: Avoid breathing exhaust, wear gloves, and wash hands frequently when servicing the equipment.

• Q: Can I use E15 or E85 fuel?
  A: No, only use fuel with an ethanol content of 10% or less.

WARNING: Operating, servicing, and maintaining this equipment can expose you to chemicals including engine exhaust, carbon monoxide, phthalates, and lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. To minimize exposure, avoid breathing exhaust, and wear gloves or wash your hands frequently when servicing this equipment. For more information go to www.P65warnings.ca.gov.

DISCLAIMERS
All information, illustrations, and specifications in this manual were in effect at the time of publishing. The illustrations used in this manual are intended as representative reference views only. We reserve the right to make any specification or design change without notice.

ALL RIGHTS RESERVED
All rights reserved. No reproduction allowed in any form without written permission from Westinghouse Outdoor Power Equipment.

DANGER
Read this manual before using or performing maintenance on this product. Failure to follow the instructions and safety precautions in this manual can result in serious injury or death.

SAVE THESE INSTRUCTIONS

INTRODUCTION

SPECIFICATIONS

*Ethanol content of 10% or less. DO NOT use E15 or E85.

NOTICE
This product is designed and rated for continuous operation at ambient temperatures up to 104°F (40°C). If needed, this product can be operated at temperatures ranging from 5°F (15°C)–122°F (50°C) for short periods. If the product is exposed to temperatures outside of this range during storage, it should be brought back within this range before operation. This product must always be operated outdoors in a well-ventilated area and far away from doors, windows, and other vents.
Maximum power decreases about 3.5% for each 1,000 feet above sea level, and will also decrease about 1% for each 10°F (6°C) above 60°F (16°C) ambient temperature.

PRODUCT REGISTRATION

For trouble-free warranty coverage, it is important to register your Westinghouse pressure washer.

You can register by

• Completing and mailing the product registration card included in the carton.
• Registering your product online at: https://westinghouseoutdoorpower.com/pages/warranty-registration
• Sending the following product information to:

Westinghouse Outdoor Power Warranty registration
777 Manor Park Drive Columbus, OH 43228

For Your Records

• Date of Purchase:
• Model Number:
• Serial Number:
• Place of Purchase:

IMPORTANT : Keep your purchase receipt for trouble-free warranty coverage.

SAFETY

SAFETY DEFINITIONS
The words DANGER, WARNING, CAUTION, and NOTICE are used throughout this manual to highlight important information. Make sure that the meanings of this safety information is known to all who operate, perform maintenance on, or are near the pressure washer.

This safety alert symbol appears with most safety statements. It means attention, become alert, your safety is involved! Please read and abide by the message that follows the safety alerts symbol.

DANGER
Indicates a hazardous situation which, if not avoided, will result in death or serious injury.

WARNING
Indicates a hazardous situation which, if not avoided, could result in death or serious injury.

CAUTION
Indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.

NOTICE
Indicates a situation which can cause damage to the pressure washer, personal property, and/or the environment, or cause the equipment to operate improperly.

Note : Indicates a procedure, practice or condition that should be followed for the pressure washer to function in the manner intended.

SAFETY SYMBOLS

Follow all safety information contained in this manual and on the pressure washer.

DANGER

CARBON MONOXIDE – using this product indoors CAN KILL YOU IN MINUTES. Operate this product outdoors only in a well ventilated area.
DO NOT operate the product inside any building, including garages, basements, crawlspaces and sheds, enclosure, or compartment. DO NOT allow exhaust fumes to enter a confined area through windows, doors, vents, or other openings.

FUEL SAFETY

DANGER
Fire and explosion hazard. Gasoline is highly explosive and flammable and can cause severe burns or death.

• In case of a gas fire, do not attempt to extinguish the flame if the fuel tank valve is in the ON position. Introducing an extinguisher to a pressure washer with an open fuel valve could create an explosion hazard.
• Gas has a distinctive odor, this will help detect potential leaks quickly.
• Gas vapors can cause a fire if ignited.
• Gasoline is a skin irritant and needs to be cleaned up immediately if it comes in contact with the skin.
• Gasoline and gasoline vapors are extremely flammable and explosive under certain conditions.
• ALWAYS refuel the pressure washer outdoors, in a well-ventilated area.
• NEVER remove the fuel cap with the engine running.
• NEVER refuel the pressure washer while the engine is running. Always turn the engine off and allow the pressure washer to cool for at least two minutes before refueling.
• Only fill fuel tank with gasoline.
• Keep sparks, open flames or other form of ignition (such as match, cigarette, static electric source) away when refueling.
• NEVER overfill the fuel tank. Leave room for fuel to expand. Overfilling the fuel tank can result in a sudden overflow of gasoline and result in spilled gasoline coming in contact with HOT surfaces.
• Spilled fuel can ignite. If fuel is spilled on the pressure washer, wipe up any spills immediately. Dispose of rag properly. Allow area of spilled fuel to dry before operating the pressure washer.
• Wear eye protection while refueling.
• NEVER use gasoline as a cleaning agent.
• Store any containers containing gasoline in a well-ventilated area, away from any combustibles or source of ignition.
• Check for fuel leaks after refueling.
• Never operate the engine if a fuel leak is discovered.
• Store fuel in a container approved for gasoline.
• Do not smoke when filling the pressure washer with gasoline.
• Do not allow the gas tank to overflow when filling.
• Shut down the engine and allow it to cool for two minutes before adding gasoline or oil to the pressure washer.
• Wipe spilled fuel from the unit.
• Never attempt to burn off spilled fuel.
• Store any containers containing gasoline in a well-ventilated area, away from any combustibles or source of ignition.

GENERAL SAFETY PRECAUTIONS

• Do not operate when you are tired or under the influence of drugs, alcohol, or medication.
• Always wear safety goggles or safety glasses with side shields, and as necessary a full face shield as well as full ear protection when operating this product.
• If you begin to feel sick, dizzy, or weak while using the pressure washer, move to fresh air IMMEDIATELY. See a doctor, as you can have carbon monoxide poisoning.
• Only use OUTSIDE and far away from windows, doors, and vents as recommended by the US Department of Health and Human Services Centers for Disease Control and Prevention. Your specific home and/or wind conditions may require additional distance.
• While operating and storing, keep at least five feet of clearance on all sides of pressure washer, including overhead. Allow the pressure washer to cool a minimum of 30 minutes before storage. Heat created by the muffler and exhaust gases could be hot enough to cause serious burns and/or ignite combustible objects.
• Do not touch the muffler or engine. They are very HOT and will cause severe burns. Do not put body parts or any flammable or combustible materials in the direct path of the exhaust.
• Always remove any tools or other service equipment used during maintenance away from the unit before operating.
• Avoid skin contact with engine oil or gasoline. Wear protective clothing and equipment. Wash all exposed skin with soap and water.

DANGER
Risk of injection or injury. High pressure jets can be dangerous if subject to misuse. DO NOT direct discharge stream at persons, animals, electrical devices, or the machine itself. ALWAYS point spray gun in safe direction. Every time you stop the engine, depress the spray gun trigger to relieve pressure.

DANGER
NEVER spray flammable liquids or use pressure washer in areas containing combustible dust, liquids, or vapor. NEVER operate this machine in a closed building or in or near an explosive environment.

The wheels are only intended for hand transport. The wheels are not suitable for towing the pressure washer either on or off-road

WARNING
The wheels are only intended for hand transport. The wheels are not suitable for towing the pressure washer either on or off-road

• NEVER disconnect the high pressure discharge hose from the machine while the system is pressurized.
• DO NOT let water in the pump freeze. See Storage section in the manual for instructions regarding winter storage.
• If water has frozen in the pressure washer, thaw the pressure washer in a warm room before starting.
• Use the pressure washer only for intended uses.
• Operate only on level surfaces.
• DO NOT expose pressure washer to excessive moisture, dust, or dirt.
• DO NOT allow any material to block the cooling slots.
• DO NOT use the pressure washer if the unit sparks, smokes, emits flames, or vibrates excessively.

When starting the pressure washer

• NEVER run the unit dry. Be sure the water supply is completely turned on before operating the unit.
• DO NOT pour hot water on or into the pump; internal parts will be damaged and your warranty will be voided. ONLY use cold water.
• Use only on a level surface.
• Make sure there is proper drainage to dissipate water.
• Make sure that the fuel cap, air filter, spark plug, fuel lines, and exhaust system are properly in place.
• If you spill any gasoline on the tank, allow it to fully evaporate before operating.

When transporting or servicing the pressure washer

• Disconnect the spark boot to prevent accidental starting. When storing the pressure washer:
• Store away from sparks, open flames, pilot lights, heat, and other sources of ignition.
• Do not store gasoline near furnaces, water heaters, or any other appliances that produce heat or have automatic ignitions.

NOTICE
Water under high pressure can damage fragile surfaces. ALWAYS practice on a inconspicuous test area to understand when damage may occur.

WARNING
Use of pressure washers can create wet walking surfaces. While using a pressure washer, forces from the gun can cause you to loose footing and fall.

WARNING
High pressure spray can splash back at operator or propel objects.

• NEVER allow children to operate any pressure washer or play nearby.
• NEVER leave spray gun unattended while machine is running or until after engine has been turned off and pressure has been relieved from the spray gun.
• NEVER repair high pressure hose, replace it.
• NEVER repair leaking connections with sealant, replace damaged O-rings.
• NEVER use spray gun with a damaged or altered trigger lock.
• NEVER: secure the trigger in the open / spray position.
• ALWAYS keep high pressure hose connected to spray gun and pump while in use.
• ALWAY make sure that the spray gun nozzle is properly attached to the lance.
• ALWAYS wear safety goggles when operating this equipment. Safety goggles cover the sides, top and bottom of the eyes. Don’t confuse safety glasses for goggles.
• Use only on a level surface.
• DO NOT use on elevated surface where kickback could result in a serious fall.
• ALWAYS grasp the gun with two hands to prevent potential injury do to the high pressure from the gun.

COMPONENTS

PRESSURE WASHER COMPONENTS

1. Spray Gun: Controls the application of water onto the surface with trigger. Includes trigger lock.
2. Gun Lance: Connects to end of spray gun and works with pressure nozzles included.
3. Thermal Relief Valve: When water reaches 125o F warm water will discharge from pump onto ground to help prevent internal pump damage.
4. Recoil Handle: Pull to start engine.
5. Oil Dipstick/Filler Neck: Used to check/fill oil.
6. Air Filter
7. Pump: Generates high pressure.
8. Unloader Valve: Controls pressure output.
9. High Pressure Outlet: Connection for high pressure hose.
10. Water Inlet: Connection for garden hose.
11. Fuel Tank: Fill with regular unleaded fuel. Do not overfill.
12. High Pressure Hose
13. Fuel On/Off Switch: Turns fuel supply to the engine on and off.
14. Choke: Prepares a cold engine for starting.
15. Nozzles: Varying sizes for various high pressure cleaning applications.
16. Detergent Tank: Siphons detergent into the low pressure stream. Automatically turns on when using black soap nozzle. Only use pressure washer safe detergent.
17. Oil Drain Plug: Used to drain engine oil.
18. Engine On/Off Switch: Turn switch to the ON position before using the recoil starter. Turn to the OFF position to stop the engine.
19. Detergent Hose Connection Barb: Connects detergent tank to pump.
20. Nozzle Cleaning Tool: Used to clean nozzles.

ASSEMBLY

CARTON CONTENTS

CAUTION
Weight hazard. Always have assistance when lifting the pressure washer.

1. Carefully open the carton.
2. Remove and save the carton contents.
3. Remove and discard the packing tray.
4. Unfold the top of the plastic bag enclosing the pressure washer.
5. Carefully cut the vertical corners of the carton.
6. Recycle or dispose of the packaging materials properly.

CARTON CONTENTS

Item Quantity

• User manual 1
• Quick Start Guide 1
• Bottle 10W-30 oil 1
• Bottle funnel tip 1
• Spray gun 1
• Spray gun lance 1
• Handle 1
• High pressure hose 1
• Mounting foot 1
• Nozzle cleaning tool 1
• Spray nozzles 5
• Nut, M8 1
• Spray gun upper holder 1
• Push rivet 1
• Spray gun lower holder 1
• Bolt and nut, M6 1

If any parts are missing, contact our service team at service@wpowereq.com or call 1-855-944-3571.

INSTALL HANDLE
Install the handle on the lower frame with the decal side facing the engine. Slide the handle downward until the spring buttons click into place through the holes in the handle.

INSTALL MOUNTING FOOT AND LOWER GUN HOLDER
Install the mounting foot and secure with the M8 Nut. Attach the lower gun holder with the M6 screw, washers, and nut.

INSTALL UPPER GUN HOLDER
From the front of the unit, remove top-right bolt, washers, and nut. Reinstall with the upper spray gun holder. From the rear of the unit, install the push rivet as shown.

INSERT SPRAY NOZZLES
Insert the colored nozzles into the corresponding holders on the top of the pressure washer.

ASSEMBLE SPRAY GUN AND HOSE

1. Install the spray lance on the spray gun. Tighten the spray gun collar hand-tight. DO NOT over-tighten.

2. Install the high-pressure hose and tighten the collar. DO NOT over-tighten.

3. Engage the trigger lock in the safe position.
   Note : The trigger lock prevents the spray gun from being triggered accidentally. Push the lock fully up to engage it.

4. Select desired nozzle for application. Pull back the quick-connect collar at the end of the spray lance. Insert the nozzle then release the collar. Pull on the nozzle to make sure it is secured.

5. Mount the spray gun in the gun holders.

6. Connect the high-pressure hose to the high pressure outlet on the pump. DO NOT over-tighten.

NOTICE
Be careful to avoid cross-threading, which can cause the hose to leak during use.

INITIAL OIL FILL

NOTICE
THIS UNIT HAS BEEN SHIPPED WITHOUT OIL. Do not attempt to crank or start engine before it has been properly serviced with recommended oil. Failure to add engine oil before starting will result in serious engine damage.

NOTICE
Use of 2-stroke/cycle oil or other unapproved oil types can cause severe engine damage that is not covered under warranty.

The included, recommended oil type for typical use is 10W-30 engine oil. If running the pressure washer in extreme temperatures, refer to the following chart.

1. On a level surface, remove the oil dipstick.
   Note : There is an oil dipstick/filler neck on both sides of the unit. Either can be used to check or add oil.

2. Using the supplied oil and funnel tip, add oil into oil filler neck.
   Note : As residual oil from the factory may remain in  the engine, add the oil incrementally to prevent overfilling the engine. See Engine Oil Level Check in the Maintenance section.

3. Replace the oil dipstick and hand-tighten.

FUEL

WARNING
Fire and explosion hazard. Never use a gasoline container, gasoline tank, or any other fuel item that is broken, cut, torn or damaged.

DANGER
Fire and explosion hazard. Do not overfill fuel tank. Fill only to the bottom of the filler neck. Overfilling may cause fuel to spill onto engine causing a fire or explosion hazard.

DANGER
Fire and explosion hazard. Never refuel the pressure washer while the engine is running. Always turn the engine off and allow the pressure washer to cool for two minutes before refueling.

NOTICE
Do not use E15 or E85 fuel in this product. Engine or equipment damage caused by stale fuel or the use of unapproved fuels (such as E15 or E85 ethanol blends) is not covered by warranty. Only use unleaded gasoline containing up to 10% ethanol.

FUEL REQUIREMENTS

• CLEAN, FRESH, unleaded gasoline, 87–93 octane.
• Up to 10% ethanol (gasohol) is acceptable (where available; non-ethanol fuel is recommended).
• DO NOT use E85 or E15.
• DO NOT use a gas oil mix.
• DO NOT modify the engine to run on alternate fuels.
• DO NOT fuel indoors.
• DO NOT create a spark or flame while fueling.

USING FUEL STABILIZER
Adding a fuel stabilizer (not included) extends the usable life of fuel and helps prevent deposits from forming that can clog the fuel system. Follow the manufacturer’s instructions for use.
Always mix the correct amount of fuel stabilizer to gasoline in an approved gasoline container before fueling the pressure washer. Run the pressure washer for two minutes to allow the stabilizer to treat the entire fuel system.

FILLING THE FUEL TANK

1. Turn the pressure washer OFF and allow to cool for a minimum of two minutes before fueling.

2. Place the pressure washer on level ground in a well ventilated area.

3. Clean area around fuel cap and remove the cap slowly.
   NOTICE
   Only fill the tank from an approved gasoline container. Make sure the gasoline container is internally clean and in good condition to prevent fuel system contamination.

4. Slowly add the recommended fuel. Do not overfill. Fill only to the top of the fuel screen filter visible in the filler neck.

5. Install the fuel cap and tighten until a click is heard.

NOTICE
Fuel can damage paint and plastic. Use caution when filling the fuel tank. Damage caused by spilled fuel is not covered under warranty.

NOTICE
Clean the fuel screen filter of debris before and after each fueling. Remove the fuel screen filter by slightly compressing it while removing it from the fuel tank.

CONNECT THE GARDEN HOSE

NOTICE
Never connect your pressure washer to a hot water supply. Connecting your pressure washer to a hot water source will significantly reduce the life of the pump and will void the warranty.

The water supply must come from a pressurized water spicket. NEVER use hot water or water from pools, lakes, etc. Before connecting the garden hose to the pressure washer:

1. Run water through the hose for 30 seconds to clean any debris from the hose.

2. Inspect the screen and gasket in the pump water inlet. If the screen or gasket is damaged, do not use the pressure washer until replaced.

3. If the screen is dirty, clean it before connecting the garden hose to the pump.

4. Completely uncoil the garden hose or remove completely from reel to prevent kinks.
   NOTICE
   There must be a minimum of 10 ft. (3 m) of unrestricted hose between the pressure washer intake and the hose faucet or shut off valve (such as a “Y” shut off connector).

5. With the hose faucet turned OFF, attach the end of the garden hose to the pump water inlet. Tighten by hand.

NOTICE
Do not run the pressure washer without the water supply connected and turned on, as this may damage the high pressure seals and decrease pump life. Completely unwind the hose from its reel or coil and make sure the hose is not being restricted by tires, rocks, or any other objects that may lessen or prevent water flow to the pressure washer

OPERATION

PRESSURE WASHER LOCATION

DANGER
Asphyxiation hazard. Never operate the pressure washer in an enclosed area. Engine exhaust contains carbon monoxide that can kill in minutes. Only operate the pressure washer outside and away from windows, doors and vents. Place the pressure washer in a well-ventilated area. DO NOT place the pressure washer near vents or intakes where exhaust fumes could be drawn into occupied or confined spaces. Carefully consider wind and air currents when positioning the pressure washer.

This pressure washer must have at least 5ft. (1.5m) of clearance from combustible material. Leave at least 3 ft. (0.91 m) of clearance on all sides of the pressure washer to allow for adequate cooling, maintenance, and servicing.

BEFORE STARTING THE ENGINE
Verify that:

• The pressure washer is placed in an appropriate location.
• The unit is on a dry, flat, and level surface.
• The engine is filled with oil.

STARTING THE ENGINE

WARNIG
Always wear safety goggles or safety glasses with side shields, and as necessary a full face shield as well as full ear protection when operating this product.

NOTICE
Running the unit for more than one minute without spraying water causes heat to build up in the pump. In the event that the pump gets too hot, a thermal relief valve will open to release the hot water. Running the unit without spraying water can damage pump components and will void the warranty.

1. Turn the water supply ON.

2. Pull the trigger on the spray gun to purge all air from the pump and hose. This may take several minutes.

3. Do not start the engine until a steady stream of water is flowing from the nozzle.

4. Turn the engine switch to the ON position.

5. Turn the fuel valve to the ON position.

6. If the engine is cold, move the choke lever to the CHOKE position.

7. Pull the recoil handle slowly until resistance is felt and then pull rapidly.
   Note : If the engine starts briefly and then shuts off,  squeeze the trigger on the spray gun to relieve the pressure before trying to start the engine again.

8. Once the engine starts, move the choke lever to the RUN position. Allow the engine to warm up slightly before use.

STOPPING THE PRESSURE WASHER
During normal operation, use the following steps to stop the pressure washer:

1. Engage the spray gun trigger lock in the safe position.
2. Move the engine OFF/ON switch to the OFF position.
3. Close the fuel valve.
4. Turn the water supply OFF.
5. Disengage the trigger lock and depress the trigger for 15 seconds to depressurize the system.
6. Disconnect the garden hose from the water inlet.
7. Complete all steps in the AFTER EACH USE section of this manual.

DURING AN EMERGENCY
If there is an emergency and the pressure washer must be stopped quickly, push the engine control switch to OFF position immediately.

SELECTING NOZZLES
The quick-connect coupler on the spray lance allows changing between nozzles while the pressure washer is running.

WARNING
Always engage the trigger lock before changing a nozzle.

NOTICE
Only use the nozzles that were supplied with the pressure washers. Using any other nozzles can affect performance and may void the warranty. For replacement nozzles call 855-944-3571.

CHANGING THE NOZZLE
Pull back the quick-connect collar at the end of the spray lance. Insert the nozzle then release the collar. Pull on the nozzle to make sure it is secured.

SPRAYING TIPS
For most cleaning, keep nozzle 8 – 24 in. (20 – 61 cm) away from cleaning surface.

• Damage may occur to the cleaning surface if you spray too close, especially with high-pressure nozzles.
• When beginning to spray, start farther away and move closer to avoid damage to the surface.
• To prevent damage to tires, allow at least 6 in. (15 cm) between a tire and the nozzle.

DETERGENT USE
The use of detergents can dramatically reduce cleaning time and assist in the removal of difficult stains. Many detergents are customized for pressure washer use for specific cleaning tasks. When spraying detergent, the detergent will be diluted 1:12. Approximately 621 ml (21 oz.) of detergent will be consumed from the tank for every minute sprayed.

NOTICE
Only use detergents designed for pressure washers. Pressure washer detergents are as thick as water. Using thicker detergents, like dish soap, will clog the chemical injection system. Do not use household detergents, acids, alkalines, bleaches, solvents, flammable material, or industrial grade solutions, which can damage the pump or cause property damage.
Prepare cleaning solution as instructed on the solution bottle. Always test in an inconspicuous area before beginning. You can effectively clean surfaces by combining the chemical action of detergents with high pressure rinses. On vertical surfaces, apply the detergent starting at the bottom and work your way upward. This method prevents the detergent from sliding down and causing streaks. Begin high pressure rinsing at the bottom and work your way upward. On particularly tough stains, use a brush in combination with detergents and high pressure rinsing.

1. Fill the detergent tank with cleaning solution.

2. Install the detergent nozzle (black) in the spray lance. Detergent will only be drawn through the pump when the black detergent nozzle is attached to the end of the spray lance.

3. Make sure the water supply is ON. Start the engine. Pull the trigger to spray the detergent solution.
   NOTICE
   NEVER use bleach in detergent tank. It will damage the pump and void the warranty.

4. Use long, even overlapping strokes to apply soap. Allow 3 – 5 minutes for the soap to soak in before rinsing. Do not allow the soap to dry on the surface before rinsing. Reapply soap if necessary to maintain a wet surface for the soap to soak in.

DETERGENT SYSTEM FLUSH
The detergent suction system can be flushed by removing the suction tube from the detergent tank and placing the tube in a fresh bucket of water. Only perform a system flush when the detergent tank is empty.

1. With the water supply ON, the black nozzle connected to the spray gun lance, and the engine running, disconnect the suction tube from the bottom of the detergent tank.
2. Place the suction tube in a clean bucket of water, disengage the trigger lock, then depress the spray gun trigger to flush the system.
3. Engage the trigger lock then reinstall the suction tube on the detergent tank.

AFTER EACH USE

1. Lock the spray gun trigger.
2. Turn the engine OFF, then turn the water supply OFF.
3. Disengage the trigger lock and depress the trigger for 15 seconds to depressurize the system.
4. Let the pressure washer cool down.
5. Disconnect the high-pressure hose and water inlet hose.
6. Drain the hoses, spray gun, and nozzle extension.
7. Engage the trigger lock on the spray gun.
8. Wipe off all remaining water with a clean, dry rag.
9. While the pressure washer is turned off, pull the recoil handle 5 – 6 times. This should remove most of the remaining liquid inside the pump.
10. Store the pressure washer in a clean, dry place.

TRANSPORTING

CAUTION
Weight hazard. Always have assistance when lifting the pressure washer.

• Allow the pressure washer to cool a minimum of 30 minutes before transporting.
• Only use the pressure washer’s fixed frame to lift the unit or attach any load restraints such as ropes or tie-down straps. Do not attempt to lift or secure the pressure washer by holding onto any of its other components.
• Keep the unit level during transport to minimize the possibility of fuel leakage or, if possible, drain the fuel or run the engine until the fuel tank is empty before transport.
• The pressure washer wheels are only intended for hand transport. The wheels are not suitable for towing the pressure washer either on or off-road.

CAUTION
Fire hazard. Do not up-end the pressure washer or place it on its side. Fuel or oil can leak and damage to the pressure washer may occur.

MAINTENANCE

MAINTENANCE SCHEDULE

WARNING
Disconnect the spark plug boot from the spark plug when performing maintenance on the pressure washer.

Regular maintenance will improve performance and extend the service life of the pressure washer. Follow the hourly or calendar intervals, whichever occurs first. More frequent service is required when operating in adverse conditions as noted below.

Before Each Use

Check engine oil

• Check water inlet screen and gasket
• Clean around air intake and muffler

After First 5 Hours
Change engine oil

After 50 Hours or Every Season

• Clean air filter
• Change engine oil if operating under heavy load or in hot environments
• Clean spark arrestor

After 100 Hours or Every Season

• Inspect/clean spark arrestor
• Inspect/clean spark plug
• Inspect/adjust valve clearance*

After 300 Hours

• Replace spark plug

• Replace air filter

• Recommend service to be performed by authorized Westinghouse service dealer.

CLEANING THE PRESSURE WASHER

CAUTION
DO NOT spray the pressure washer with water. Water can contaminate the fuel system and can enter the engine through the cooling slots and damage the engine.

1. Use a damp cloth to clean exterior surfaces of the pressure washer.
2. Use a soft bristle brush to remove dirt and oil.
3. Use an air compressor (25 PSI) to clear dirt and debris from the pressure washer.
4. Inspect all air vents and cooling slots to ensure that they are clean and unobstructed.

CLEANING SPRAY NOZZLES
Detach the nozzle from the spray lance. Use the included nozzle cleaning tool to loosen any particles in the nozzle. Flush with water.

AIR FILTER MAINTENANCE

WARNING
Fire hazard. Never use gasoline or other flammable solvents to clean the air filter.

The air filter must be cleaned after every 50 hours of use or six months (frequency should be increased if the pressure washer is operated in a dusty environment).

1. Place the pressure washer on a level surface and allow the engine to cool for several minutes.

2. Use your fingers to unscrew the thumb screw on top of the air filter assembly. Remove the wing nut, then remove the air filter.

3. Use compressed air to clean the air filter from the inside out.
   Note : The outer foam air filter element is not intended to  be removed. If torn, replace the air filter.

ENGINE OIL LEVEL CHECK

CAUTION
Avoid skin contact with engine oil. Wear protective clothing and equipment. Wash all exposed skin with soap and water.

NOTICE
Always use the specified engine oil. Failure to use the specified engine oil can cause accelerated wear and/or shorten the life of the engine.

When using the pressure washer under extreme, dirty, dusty conditions or in extremely hot weather, change the oil more frequently.
Ambient air temperature will affect engine oil performance. Change the type of engine oil used based on weather conditions.

Check the engine oil level before each use.

1. Place the pressure washer on a level surface and allow the engine to cool for several minutes.

2. With a damp rag, clean around the oil dipstick.
   Note : There is an oil dipstick/filler neck on both sides of the unit. Either can be used to check or add oil.

3. Remove the oil dipstick and wipe the dipstick clean.

4. Screw the dipstick fully into the oil filler neck. Remove the dipstick and verify that the oil level is within safe operating range.

5. If low, add recommended engine oil incrementally and recheck until the level is between the L and H marks on the dipstick. DO NOT overfill. If over the full mark (H) on the dipstick, drain the oil to reduce the oil level to the full mark.

6. Replace the oil dipstick and hand-tighten.

ENGINE OIL CHANGE
When using the pressure washer under extreme, dirty, dusty conditions or in extremely hot weather, change the oil more frequently. Change the oil while the engine is still warm from operation.

1. Place the pressure washer on a level surface and allow the engine to cool for several minutes.
2. With a damp rag, clean around the oil dipstick. Remove the dipstick and wipe clean.
3. Place an oil pan (or suitable container) under the oil drain bolt.
4. Using a 10mm wrench, remove the oil drain bolt and allow the oil the to drain.
5. Install the oil drain bolt and tighten securely.
6. Slowly pour oil into the oil filler neck until oil the level is between the L and H marks on the dipstick. Stop frequently to check the oil level. DO NOT overfill.
   Maximum oil capacity: 20 Oz. (0.6 Liter) 7. Install the oil dipstick and hand- tighten.

NOTICE
Do not pollute. Follow the guidelines of the EPA or other governmental agencies for proper disposal of hazardous materials. Consult local authorities or reclamation facility.

SPARK PLUG MAINTENANCE
Inspect and clean the spark plug after every 100 hours of use or six months. Replace the spark plug after 300 hours of use or every year.

1. Place the pressure washer on a level surface and allow the engine to cool.

2. Remove the spark plug boot by firmly pulling the spark boot directly away from the engine.

3. Clean the area around the spark plug.

4. Remove the spark plug with the included spark plug socket wrench.
   NOTICE
   Never apply any side load or move the spark plug laterally when removing the spark plug.

5. Inspect the spark plug. Replace if electrodes are pitted, burned, or the insulator is cracked. Only use a recommended replacement plug.
   Recommended Spark Plug Replacement

6. Measure the spark plug electrode gap with a wire-typefeeler gauge. If necessary, correct the gap by carefully bending the side electrode.
   Spark plug gap: 0.024 – 0.032 in. (0.60 – 0.80 mm)

7. Carefully install the spark plug finger tight, then tighten as additional 3/8 to 1/2 turn with the spark plug wrench.

8. Attach the spark plug boot.

SPARK ARRESTOR SERVICE
Allow the muffler to cool completely before servicing the spark arrestor. Check and clean the spark arrestor after every 100 hours of use or every season. Failure to clean the spark arrestor will result in degraded engine performance.

1. Place the pressure washer on a level surface.
2. Carefully remove the carbon deposits from the spark arrestor screen with a wire brush. The spark arrestor must be free of breaks and tears. Replace the spark arrestor if damaged.

STORAGE
Proper storage preparation is required for trouble-free operation and pressure washer longevity.

NOTICE
Gasoline stored for as little as 30 days can deteriorate, causing gum, varnish, and corrosive buildup in fuel lines, fuel passages, and the engine. This corrosive buildup restricts the flow of fuel, which can prevent the engine from starting after a prolonged storage period. The use of fuel stabilizer significantly increases the storage life of gasoline. Full-time use of fuel stabilizer is recommended. Follow the manufacturer’s instructions for use.

WARNING
Never store a pressure washer with fuel in the tank indoors or in a poorly ventilated area where the fumes can come in contact with an ignition source such as a pilot light of a stove, water heater, clothes dryer, or any other gas appliance, or a spark from an electric appliance.

STORED FOR LESS THAN 30 DAYS

• Allow the pressure washer to cool a minimum of 30 minutes before storage.
• Wipe the pressure washer with a moist cloth. Clean any debris from the muffler cooling vents.
• Store the pressure washer in a well-ventilated, clean, dry location away from sparks, open flames, pilot lights, heat, and other sources of ignition such as areas with a spark-producing electric motor or where power tools are operated. Store in an area out of direct sunlight.
• Do not store the pressure washer or gasoline near furnaces, water heaters, or any other appliances that produce heat or have automatic ignitions.

STORED FOR OVER 30 DAYS
Even properly stabilized fuel can leave residue and cause corrosion if left long term. If storing the pressure washer for two to six months, drain the float bowl to prevent gum and varnish buildup in the carburetor.

WINTER STORAGE
Make sure the pressure washer hose is free of all water before storing for winter. In order to prevent corrosion and keep the water pump from freezing you will need to add RV (non-toxic) antifreeze or similar pump-protection specifically made for pressure washers. Follow the manufacturer’s instructions for use.

DRAINING THE FLOAT BOWL

1. Turn the fuel tank valve to the OFF position.
2. Locate the drain screw on the bottom of the carburetor float bowl.
3. Place an appropriate gasoline container under the drain screw to catch the drained fuel.
4. Loosen the float bowl drain screw and allow the fuel to drain. Tighten the float bowl drain screw.

DRAINING THE FUEL TANK
If storing the pressure washer for longer than six months, drain the fuel tank to prevent fuel separation, deterioration, and deposits in the fuel system.

1. Drain the float bowl.
2. Unscrew the fuel tank cap. Remove the fuel screen filter by slightly compressing it while removing it from the tank.
3. Using a commercially available gasoline hand pump (not included), siphon the gasoline from the fuel tank into an approved gasoline container. DO NOT use an electric pump.
4. Reinstall the fuel screen filter and the fuel tank cap.
5. Push the battery switch to the OFF position.
6. Disconnect the battery quick-connect plugs.
7. Remove the spark plug.
8. Put a teaspoon of engine oil into the cylinder and pull the recoil handle until resistance is felt. At this position the piston is coming up on its compression stroke and both valves are closed. Storing the engine in this position will help prevent internal corrosion. Return the recoil handle gently.
9. Reinstall the spark plug. Leave the spark plug boot disconnected to prevent accidental starting.

VALVE CLEARANCE

NOTICE
Checking and adjusting valve clearance must be done when the engine is cold.

1. Remove the rocker arm cover and carefully remove the gasket. If the gasket is torn or damaged, it must be replaced.

2. Remove the spark plug so the engine can be rotated more easily.

3. Rotate the engine to top dead center (TDC) by pulling the recoil handle slowly. Looking through the spark plug hole, the piston should be at the top (both valves are closed).

4. Both the rocker arms should be loose at TDC on the compression stroke. If they are not, rotate the engine 360°.

5. Insert a feeler gauge between the rocker arm and the valve stem to measure valve clearance.

6. If an adjustment is necessary, hold the rocker arm pivot and loosen the pivot adjusting nut.

7. Turn the rocker arm pivot to obtain the specified clearance. Hold the rocker arm pivot and re-tighten the pivot adjusting nut to the specified torque.
   Torque: 106 inch-pound (12 N•m)

8. Perform this procedure for the other valve.

9. Install the gasket, rocker arm cover, and spark plug.

TROUBLESHOOTING

WestinghousePortablePower.com

Service Hotline: 855-944-3571
777 Manor Park Drive Columbus, OH 43228
™ & © 2023 Westinghouse Electric Corporation
© 2023 Westinghouse Outdoor Power Equipment, All Rights Reserved.
WPX3400 Rev01 122827 Rev02 03/23

References

• Warranty Registration | Westinghouse Outdoor Equipment

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