1. Introduction
Thank you for choosing the Generic Cordless Pressure Washer. This device is designed for efficient cleaning tasks around your home, car, driveway, and patio. Its portable and cordless design offers convenience and versatility. This manual provides essential information for the safe assembly, operation, maintenance, and troubleshooting of your pressure washer. Please read all instructions carefully before use and retain this manual for future reference.
2. Safety Instructions
Always observe basic safety precautions when using electrical appliances to reduce the risk of fire, electric shock, and personal injury.
- Read All Instructions: Familiarize yourself with the controls and proper use of the pressure washer.
- Wear Eye Protection: Always wear safety goggles or glasses with side shields when operating the pressure washer.
- Keep Area Clear: Ensure the work area is free of bystanders, children, and pets.
- Avoid Direct Spray: Never direct the water spray at people, animals, or electrical equipment.
- Secure Connections: Ensure all hose and nozzle connections are tight before operating.
- Use Proper Water Source: Connect the pressure washer to a clean, fresh water source. Do not use recycled water or water containing chemicals.
- Battery Safety: Use only the specified charger and battery pack. Do not expose the battery to extreme temperatures or water.
- Storage: Store the pressure washer in a dry, secure location, out of reach of children.
3. Product Components
The following components are included with your Cordless Pressure Washer:
- Car Washer Unit (Main Body)
- 21V Removable Battery (7500mAh)
- Charging Cable
- Water Pipe
- Quick Connector
- Filter
- Foam Pot
- Bottle Adapter
- Fan-Shaped Spray Nozzle
- Linear Spray Nozzle
- Metal Extension Rod + Buckle

Figure 3.1: Overview of the Cordless Pressure Washer and its included accessories, including the main unit, battery, nozzles, foam pot, and hoses.

Figure 3.2: A detailed view of all individual components supplied with the pressure washer, including the main unit, battery, charging cable, water pipe, quick connector, filter, foam pot, bottle adapter, fan-shaped nozzle, linear nozzle, and metal extension rod.
4. Setup Instructions
4.1 Charging the Battery
- Ensure the battery is fully charged before first use.
- Connect the charging cable to the battery and a suitable power source.
- The charging indicator light will show the charging status. Disconnect once fully charged.
4.2 Assembling the Pressure Washer
- Attach Battery: Slide the charged 21V battery into the base of the main pressure washer unit until it clicks securely into place.
- Connect Water Pipe: Attach one end of the water pipe to the quick connector. Insert the filter onto the other end of the water pipe.
- Connect to Unit: Connect the quick connector to the water inlet port on the pressure washer unit. Ensure a tight fit.
- Attach Extension Rod: Screw the metal extension rod onto the front of the pressure washer unit.
- Select Nozzle: Choose either the fan-shaped spray nozzle or the linear spray nozzle based on your cleaning task. Push the selected nozzle onto the end of the metal extension rod until it locks.
- Optional Foam Pot: For foam application, fill the foam pot with appropriate cleaning solution and attach it directly to the pressure washer unit or the extension rod, depending on the design.

Figure 4.1: The two interchangeable nozzles: fan-shaped for wider coverage and linear for concentrated spray.
5. Operating Instructions
5.1 Basic Operation
- Prepare Water Source: Place the filter end of the water pipe into a bucket of clean water or connect it to a garden hose using the appropriate adapter (if included).
- Prime the Pump: Before starting, hold the trigger for a few seconds to allow water to flow through the system and expel any air.
- Start Cleaning: Press the power button or pull the trigger to activate the pressure washer. Direct the spray towards the surface to be cleaned, maintaining a safe distance.
- Adjust Nozzle: Change nozzles as needed for different cleaning tasks. The fan-shaped nozzle is suitable for general washing, while the linear nozzle provides a concentrated stream for stubborn dirt.
- Stop Operation: Release the trigger to stop the water flow. For extended breaks, turn off the power button.

Figure 5.1: An individual demonstrating the use of the cordless pressure washer for cleaning outdoor surfaces, highlighting its portability and ease of use.
5.2 Using the Foam Pot
- Fill the foam pot with a suitable car wash soap or cleaning solution. Do not overfill.
- Attach the foam pot to the pressure washer unit or extension rod.
- Activate the pressure washer. The unit will draw the solution and create foam for pre-washing or deep cleaning.
- After applying foam, switch back to a water-only setup to rinse the surface thoroughly.

Figure 5.2: An individual applying foam to a car using the pressure washer's foam pot attachment, demonstrating its use for vehicle cleaning.

Figure 5.3: An individual rinsing a car, illustrating the pressure washer's effectiveness in removing soap and dirt from vehicle surfaces.
6. Maintenance
6.1 Cleaning the Unit
- After each use, disconnect the battery and flush the system with clean water to remove any detergent residue.
- Wipe down the exterior of the pressure washer with a damp cloth. Do not use abrasive cleaners.
- Clean the filter regularly to prevent blockages and maintain optimal water flow.
6.2 Battery Care
- Store the battery in a cool, dry place away from direct sunlight and extreme temperatures.
- Do not store the battery completely discharged. Charge it periodically if not used for extended periods.
6.3 Storage
- Drain all water from the pressure washer, hoses, and accessories before storing to prevent freezing damage.
- Store the unit and accessories in a dry, protected area.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Unit does not start | Battery not charged or improperly installed. | Ensure battery is fully charged and securely inserted. |
| Low water pressure | Insufficient water supply; clogged filter; air in the system. | Check water source; clean filter; prime the pump by holding the trigger until steady water flow. |
| Water leaks from connections | Loose connections; worn O-rings. | Tighten all connections; inspect and replace O-rings if damaged. |
| No water flow | Water pipe kinked; filter blocked; no water in source. | Straighten water pipe; clean filter; ensure water source is available. |
8. Specifications
- Model Number: LJLM0373DJHHH7WMPR7
- Power Supply: 21V Removable Battery
- Battery Capacity: 7500mAh
- Host Dimensions (L x H x W): Approximately 36.5 cm x 21 cm x 7.5 cm (14.37 in x 8.27 in x 2.95 in)
- Product Dimensions (L x W x H): 14.41 x 9.29 x 5.47 inches
- Item Weight: 4.15 pounds
- Nozzle Types: Fan-shaped spray, Linear spray
- Manufacturer: Generic
- ASIN: B0FJRGMP18

Figure 8.1: Diagram illustrating the key dimensions of the cordless pressure washer unit, including length, height, and width.
9. Warranty and Support
For warranty information, technical support, or service inquiries, please contact your retailer or the manufacturer directly. Retain your proof of purchase for any warranty claims.
Manufacturer: Generic