1. Introduction
Thank you for choosing the Lutian LT505-1800A High-Pressure Washer. This manual provides essential information for the safe and efficient operation, maintenance, and troubleshooting of your new pressure washer. Please read this manual thoroughly before initial use and keep it for future reference.
Important Safety Information
- Always wear appropriate personal protective equipment (PPE) such as safety glasses and gloves when operating the pressure washer.
- Never direct the water jet at people, animals, electrical equipment, or the unit itself.
- Ensure all connections are secure before starting the machine.
- Do not operate the pressure washer if the power cord or high-pressure hose is damaged.
- Keep children and pets away from the operating area.
- Always disconnect the power supply before performing any maintenance or cleaning.
2. Product Overview
The Lutian LT505-1800A is a powerful high-pressure washer designed for various cleaning tasks. It features a robust motor, an adjustable spray gun, and a built-in detergent tank for effective cleaning.
Key Components and Features:
- Adjustable Spray Gun: Allows for varied spray patterns to suit different cleaning needs.
- High-Pressure Hose: Durable hose designed to withstand high water pressure.
- Quick Water Inlet Connection: For easy and secure attachment of your water supply.
- Built-in Detergent Tank: Integrated tank for convenient application of cleaning detergents.
- 3 Axial Piston Wobble Plate Pump: Ensures reliable and consistent pressure.
- Self-Resetting Thermal Protector: Automatically shuts off the motor to prevent overheating.
- Total Stop System (TSS): Automatically shuts off the pump when the trigger is released, extending pump life.
- Wheels and Handle: For easy portability and maneuverability.

Image 1: Lutian LT505-1800A High-Pressure Washer showing its main unit, spray gun, hose, and detergent tank. The image also illustrates its 1800W motor power, ability to draw water from a bucket, 7 liters per minute flow rate, and foam dispensing feature, along with a demonstration of car cleaning.
3. Specifications
Detailed technical specifications for the Lutian LT505-1800A High-Pressure Washer:
| Specification | Value |
|---|---|
| Average Pressure | 100 bar |
| Maximum Pressure | 150 bar |
| Average Flow Rate | 6.0 L/min |
| Maximum Flow Rate | 7.0 L/min |
| Motor Power | 1800 W |
| Voltage/Frequency | AC220V-240V~50/60Hz |
| Power Source | Corded Electric |
| Hose Length | 5 Meters |
| Product Dimensions (L x W x H) | 32 cm x 27 cm x 86 cm |
| Color | White |
| Model Number | LT505-1800A |
| Manufacturer | Lutian |

Image 2: A specification sheet for the Lutian LT505-1800A, detailing its nominal and maximum pressure, flow rates, motor power, and voltage/frequency.
4. Setup
Follow these steps to set up your pressure washer for first use:
- Unpacking: Carefully remove all components from the packaging. Check for any damage during transit.
- Assembly:
- Attach the handle to the main unit if it is not pre-assembled.
- Connect the high-pressure hose to the outlet on the pressure washer and to the spray gun. Ensure connections are hand-tight and secure.
- Insert the adjustable spray nozzle into the spray gun.
- Water Supply Connection:
- Connect a garden hose (not supplied) to the quick water inlet connection on the pressure washer.
- Ensure the garden hose is free of kinks and has an adequate water supply.
- Turn on the water supply fully before starting the pressure washer.
- Power Connection: Plug the power cable into a grounded electrical outlet. Ensure the outlet matches the voltage and frequency specifications of the unit.
5. Operating Instructions
Once the unit is set up, follow these steps for operation:
- Purging Air: Before turning on the power, squeeze the trigger on the spray gun to allow water to flow through the system and purge any air. Continue until a steady stream of water emerges.
- Starting the Unit: Turn the ON/OFF switch to the 'ON' position. The motor will start, and the pump will build pressure.
- Using the Spray Gun:
- Hold the spray gun firmly with both hands.
- Point the nozzle at the cleaning surface, maintaining a safe distance.
- Squeeze the trigger to start the high-pressure water flow.
- Adjust the spray pattern by rotating the nozzle to achieve the desired intensity and coverage.
- Detergent Application:
- Fill the built-in detergent tank with a pressure washer-safe cleaning solution.
- To apply detergent, typically the pressure needs to be reduced, or a specific detergent nozzle/setting is used. Refer to the spray gun's instructions for detergent mode.
- Apply detergent to the surface, allow it to soak for a few minutes (do not let it dry), then rinse with high-pressure water.
- Stopping the Unit:
- Release the trigger on the spray gun. The Total Stop System (TSS) will automatically shut off the motor.
- Turn the ON/OFF switch to the 'OFF' position.
- Turn off the water supply.
- Squeeze the trigger to release any remaining pressure in the system before disconnecting hoses.
6. Maintenance
Regular maintenance ensures optimal performance and extends the life of your pressure washer.
- Nozzle Cleaning: If the nozzle becomes clogged or the spray pattern is irregular, use the provided nozzle cleaning pin to clear any debris.
- Water Inlet Filter: Periodically check and clean the water inlet filter to prevent debris from entering the pump.
- Hose and Connections: Inspect the high-pressure hose and all connections regularly for wear, damage, or leaks. Replace damaged parts immediately.
- Storage:
- Drain all water from the pump, hose, and spray gun before storing, especially in freezing temperatures. Run the unit for a few seconds with the water supply off until no more water comes out.
- Store the pressure washer in a dry, frost-free location.
- Coil the high-pressure hose neatly and secure the power cord.
7. Troubleshooting
Refer to this section for common issues and their solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Motor does not start | No power supply; Thermal protector activated; Faulty switch | Check power connection/outlet; Allow unit to cool down; Contact service center |
| No pressure or low pressure | Insufficient water supply; Air in pump; Clogged nozzle; Leaks in system | Ensure full water supply; Purge air from system; Clean nozzle; Check connections for leaks |
| Water leaks from connections | Loose connections; Damaged O-rings/seals | Tighten connections; Replace damaged O-rings/seals |
| Detergent not dispensing | Detergent tank empty; Detergent nozzle clogged; Incorrect pressure setting | Refill tank; Clean nozzle; Adjust pressure/nozzle for detergent mode |
8. Warranty and Support
The Lutian LT505-1800A High-Pressure Washer is manufactured to high-quality standards. For warranty information, technical support, or service inquiries, please refer to the warranty card included with your product or contact your retailer or the manufacturer directly. Keep your purchase receipt as proof of purchase for any warranty claims.